Digilyzer DL1
User Manual

NTi Audio Contact
Headquarter:

NTi Audio AG
Im alten Riet 102
9494 Schaan
Liechtenstein, Europe
TelFax
E-mailHome+423 - 239 6060
+423 - 239 6089
info@nti-audio.com
www.nti-audio.com

NTi Audio is an ISO 9001:2008
certified company.

© NTi Audio AG
All rights reserved.
Subject to change without notice.
Release 2.20 / Oct. 2014 / Software D2.20
Digilyzer, Minirator, Minilyzer, MiniSPL,MiniLINK and Minstruments are registeredtrademarks of NTi Audio.
2

Made in
Switzerland

Index:
1. Introduction

4

2. Overview

8

CE Declaration of Conformity
Registration
International Warranty and Repair
Warnings
Test & Calibration Certificate
Scope of Delivery
FunctionsMonitoring
Connectors
Battery Replacement

4
5
6
7
7
7

9
10
13
14

3. First Steps

15

4. Basic Operation

18

5. Measurement Functions27

6. Troubleshooting50

7. Accessories

51

8. Appendix

53

9. Technical Specification

64

Channel Status
Bit Statistic
LoggerVU+PPM
Level Measurement
Level Peak
Level RMS
Level Sweep
THD+N
Scope

27
33
35
39
41
42
43
45
47
49

MiniLINK
Mains Power Adapter
Minstruments System Case
Pouch

51
51
52
52

1C2f Format
Logger Event Coding
Professional Format Coding
Consumer Format Coding

53
55
58
61

3

Introduction

1. Introduction
Congratulations and thank you for buying NTi Audio’s Digilyzer
DL1, a product specially suited for professional audio applications.
The Digilyzer offers advanced analysis functions, expected only inmuch larger and more expensive systems. We are convinced you
will enjoy using it!
NTi Audio products are manufactured in compliance with the highest
quality standards and marked with the CE sign.

CE Declaration of Conformity
We, the manufacturer

NTi Audio AG
Im alten Riet 102
9494 Schaan
Liechtenstein, Europe

hereby declare that the product Digilyzer DL1, released in 2001,
conforms to the following standards or other normative documents.
EMC-Directives:		
Harmonized Standards:

89/336, 92/31, 93/68
EN 61326-1

This declaration becomes void in case of any changes on the productwithout written authorization by NTi Audio.
Date:

01.11.2001

Signature:
Position of signatory: Technical Director

4Introduction

Registration
Register as a customer with NTi Audio and benefit from the following
possibilities:• Keep your products up-to-date
Access free firmware and software updates.
• Activate options
Enable additional functions for your products.
• Access premium content
Access downloads, information and specific support for yourproducts.
• Receive application and product news
Sign in for the NTi Audio Newsletter.
• Get fast worldwide support
Register your products for fast support.
• Confirm your ownership
Allows us to contact you with important product notifications
and provides a product record in case of loss or theft.

How to Register• Open the web page “http://my.nti-audio.com”.
• You are prompted to login or create the My NTi Audio
Account.
• The web page “My NTi Audio Products” opens.
• Select the product type and enter the serial number.
• Confirm with “Register”.
• Now the product is listed in the table “My NTi Audio
Products“.

5Introduction

International Warranty and Repair
International Warranty

NTi Audio guarantees the Digilyzer DL1 and its components against
defects in material or workmanship for a period of one year fromthe date of original purchase, and agrees to repair or to replace atits discretion any defective unit at no cost for either parts or labor
during this period.

Restrictions

This warranty does not cover damages caused through accidents,
misuse, lack of care, the attachment or installation of any componentsthat were not provided with the product, loss of parts, connecting the
instrument to a power supply, input signal voltage or connector typeother than specified, or wrongly polarized batteries. In particular,
no responsibility is granted for special, incidental or consequential
damages.
This warranty becomes void if servicing or repairs of the product are
performed by any party other than an authorized NTi Audio service
center or if the instrument has been opened in a manner other thanspecified in this manual.
No other warranty, written or verbal, is authorized by NTi Audio.
Except as otherwise stated in this warranty, NTi Audio makes norepresentation or warranty of any kind, expressed or implied in law
or in fact, including, without limitation, merchandising or fitting for any
particular purpose and assumes no liability, either in tort, strict liability,
contract or warranty for products.
Repair of your Digilyzer DL1
In case of malfunction, take - or ship prepaid - your NTi Audio Digilyzer
packed in the original box, to the authorized NTi Audio representativein your country. For contact details see the NTi Audio web page.
Be sure to include a copy of your sales invoice as prove of purchasedate. Transit damages are not covered by this warranty.

6

Introduction

Warnings
In order to avoid any problems during the operation of the instrument,
follow the rules listed below:• Use the instrument for the intended purpose only.
• Never connect the instrument to a high voltage output suchas a power amplifier, mains power, etc.
• Do not disassemble the instrument.
• Never use the instrument in a damp environment.
• Remove the batteries as soon as they are flat or if the
instrument is not intended to be used for a longer periodof time.

Test & Calibration Certificate
This is to certify the Digilyzer DL1 is fully tested to the manufacturer’s
specifications.
NTi Audio recommends to calibrate this test instrument one (1) year
after purchase. Thereafter the calibration- and adjustment interval issubsequently one (1) year.

Scope of Delivery
The following items are included with the packing:••••

Digilyzer DL1
Rubber Cushion
Chinch-BNC Adapter
User Manual7

Overview

2. Overview
The Digilyzer is a sophisticated tool used to analyze digital audio
signals. It is designed for easy and quick maintenance and debugging
of digital audio equipment and installations. Therefore, the Digilyzer
observes the signals from many points of view simultaneously. An
accurate overview of the actual signal condition is displayed on a large
LCD and hidden errors are visualized (e.g. consistency check).

Menu bar

Carrier
information

PPM meter

Quick status
information

Fig 2-01, Overview display
By using the Digilyzer understanding and handling digital signals is
simple. However, some basic knowledge about digital audio signals
is essential. Please refer to our homepage for some easy literature
about digital audio basics.

Interface types

The Digilyzer supports all common used interface types such as AES3,
S/PDIF, TOS-LINK and ADAT. This range could be further extended
by using external adapters or cheap equipment e.g. a TDIF to ADAT
converter.

8

Overview

Functions
The Digilyzer features many useful measurement functions which areaccessible through a menu bar.

Fig 2-02, Measurement functions

Easy operation

The Digilyzer has an easy to use menu driven user interface. Changing
of the settings takes place at the displayed values – there is nocomplex setup screen. The base element for operational functions
is the cursor (inverted area) which can be navigated through thevarious screens by using the cursor keys. All selectable settings may
be adjusted individually by pressing the enter key and selecting therequested value with the cursor keys. Confirm the setting by pressing
the enter key again.

Fig 2-03, DL1 menu

9Overview

Unit selectedwith cursor tochange setting

Fig 2-04, Changing settings

Monitoring
When it comes to digital audio, one of the major problems is, thathumans do not have digital ears and thus can not listen to theincoming embedded audio signal. The Digilyzer offers a wide rangeof functionality to make digital audio audible.

What you hear is what you measure• Functions with measurement of both channels (e.g. A+B), theoutput of the speaker is a mix of the two channel signals. Overthe headphone output you may hear the signal in stereo (channel
A on the left and channel B on the right side).
Both channels A+B selected

Fig 2-05, Channels A+B selected10Overview• Some functions, e.g. SCOPE, are one channel functions only. You
only hear the channel which is displayed on the screen.
Channel B selected

Fig 2-06, Channel B selected
Digital versus analog
Installations with digital and analog audio lines often cause headacheand struggles. In reality some analog line maybe connected and theDigilyzer can not lock to the (non digital) signal. Therefore, the Digilyzer
has the ability of analog monitoring. The Digilyzer may not lock to the
input signal digitally, but it routes the signal directly to the speakerand headphone output, so you may hear the analog input signal
acoustically. For visual clarification Analog Monitoring ON isflashing on the display.

Flashing

Fig 2-07, Analog monitoring

11

Overview

Debugging or listening?
The built-in speaker on the rear side gives the acoustical response of
the measured signal – everywhere and any time – without the needof a headphone. For the users convenience a good headphone may
be connected for listening in superior quality (up to 24 bit / 96 kHz).
The headphone output may be used as D/A converter, e.g. somerecording with a minidisc-player is requested but no analog output
is available.
Oops – no signal!
Often no signal is found during troubleshooting at digital audio lines.
Can this be? The Digilyzer offers a digital realized “AGC” (automatic
gain control) to “zoom up” the digital signal. So even a change of the
LSB (least significant bit) is fully audible. The tremendous dynamic
range of 140 dB allows to listen to the smallest disturbances. For
example someone just has closed the fader or muted the signal, sojust activate the AGC and listen; even dither noise will be audible.

Description
hotkey AGC
ON/OFF

Hotkey-symbolFig 2-08, Automatic gain control
All the above monitoring functionalities can be controlled by using
hotkeys, displayed in the Fast access setup menu.
Dual domain measurements
Level RMS and distortion (THD+N) measurements are fundamental tocheck A/D converters. The complete test system even checks mixed
mode applications such as A/D converters or digital mixers is available
in combination with the analog signal generator Minirator.

12

Overview

Connectors
The Digilyzer includes the following connectors:

AES3, 110 Ohm
terminated

S/PDIF, 75 Ohm
terminatedHeadphone
outputTOS-Link /ADAT

Fig 2-09, Inputs and outputs of DL1

NOTES• For AES3, 75 Ohm, signals (BNC connector) use theattached Chinch-BNC adapter.
• Insert a jack into the headphone output to switchof the analog monitoring with the internal speaker(e.g. during a live act).

Rubber Cushions

The original packaging of the Digilyzer includes a pair of rubbercushions. These may be adhered on the rear side of the device, so the
output signal is made audible in good quality also whilst the Digilyzer
lays, e.g. on a table, with the speaker on the bottom side.

Chinch-BNC Adapter

The Chinch-BNC Adapter enables the measurement of the AES3id,
75 Ohm standard with the Digilyzer. AES3id is especially required
for the transmission of digital signals over longer cables with a cable
length >100 m.
13

Overview

Battery Replacement
Insert three pieces of 1.5 V alkaline batteries, type AA, LR6, AM3 into
the Digilyzer battery compartment, as shown below.

RubbercushionSpeaker
1. Press

1. Press

2. PullFig 2-10, Open battery compartment

NOTE

Fig 2-11, Inserted batteries• The use of rechargeable NiCd- or NiMH-batteriescauses shorter battery lifetime than specified.
• Do not insert batteries of different types.
• Note the correct polarities of the inserted batteries.
• Remove the batteries as soon as they are flat.

14

First Steps

3. First Steps
This chapter is a quick guide explaining how to make the firstmeasurements with the Digilyzer. The example assumes an S/PDIF
signal as input (e.g. a CD player with S/PDIF output playing a music
CD).
1. Insert batteries2

2. Connect the S/PDIF signal to
the RCA input.

3. Reset the Digilyzer to default
state by holding down the
ESC key and simultaneously
pressing the ON button forabout two seconds.

3

Fig 3-01, Digilyzer
4. S e l e c t S / P D I F a s i n p u tformat4- Move the cursor (inverted box)
one step right to the format
menu by using the cursor
keys.
- Press the enter key to open
the format menu.
- Select S/PD and press theenter key.
-> The channel status information
is displayed and music is
audible trough the built-in
speaker.

Fig 3-02, Format selection

15

First Steps

5. Decrease the volume
Press and hold the ESC- andleft cursor key simultaneously.
T h i s c a u s e s t h e Fast
Access Setup screen to
be displayed and the volume
to decrease.
Decrease/increase
volume hot-keys

6. Measure the accuracy of thesampling rate

5. Volume
indication

Fig 3-03, Volume setting

The accuracy is measured
in ppm, so the unit of thesampling frequency has to bechanged as follows:- Move the cursor to the unit
“Hz”.

6

- Press the enter key to select.
- Press any cursor key tochange from “Hz” to “ppm”.
-> The measured accuracy isimmediately displayed.
- Press the enter key to confirm
the new setting.

Fig 3-04, PPM setting

7. A c t i v a t e t h e V U + P P M
function

7- Press the ESC key twice(cursor moves to the lefttop!).
- Press the enter key to open
the measurement menu.
- Move the cursor down to
VU+PPM.
- Press the enter key to confirm
the new setting.

Fig 3-05, VU+PPM mode
16

First Steps

8. Change auto power off time8

- Move the cursor to SET on themenu line and press the enter
key.
- Select AUTO POWER OFF
with the cursor keys and press
the enter key.
- Set the time to 60 MIN with the
cursor keys.
- Confirm the setting with theenter key.
- Press ESC to leave the
SETUP screen.

Fig 3-06, Auto power off setting

9. Backlight / power off- Press the On/Off key shortly
to energize the backlight.
- The backlight remains active
according to the setting in the
SETUP menu.
- Press the On/Off key fortwo seconds to switch the
instrument off.

Congratulations, the first steps have been done with the Digilyzer tosupport the basic knowledge of the menu and device handling.
NOTE• Pressing the enter key changes a value directly or
enters the selection mode (blinking cursor). The
available settings may be selected with the cursor
keys.
• In the selection mode you may press-  ENTER to confirm the setting-  ESC key to undo the setting.
17Basic Operation

4. Basic Operation
The operation of the Digilyzer is almost self-explanatory, despite thewide range of available measurement functions.

Speaker at
the rear-side

EscapebuttonPower On/OffBacklightEnter /
Cursor keys

Fig 4-01, Control elements
The LCD is divided into the menu bar on top and the results displayed
below, showing various information about the current status.
To quickly get the required information press the enter / cursor keys
and the escape button to allow straightforward navigation through theavailable features. The cursor position is represented by an inverted
display (white on black) of the field holding the cursor.
When the Digilyzer is on, it will utilize the same measurement function
settings as switched off the last time.

18

Basic Operation

Menu Bar
The menu bar allows the user to select the
Measurement
function

Input
sourceInput
formatSetup
screenFig 4-02, Menu bar

Fig 4-03, Measurement function menu

Fig 4-04, Input source menu
19

Battery status,(indication only)Basic Operation

Any of the following formats may be selected
•
•
•
•
•

AES3
S/PD - abbreviation for S/PDIFTOSL - abbreviation for TOS-LINK
ADAT - ADAT format via the TOS-Link input
1C2f - abbreviation of the single channel double sampling
frequency mode, see details to this mode in the appendix.

Fig 4-05, Format menu

Selection of Input Channel

Corresponding to the selected input source the available input
channels may be selected. The individual measurement result ofeach channel is displayed. For a better understanding of the input
channels:• Channel A the left side of a headphone• Channel B the right side of a headphone.

Indicator for Operation / Low Battery
A moving sine symbol indicates that theunit is running properly.
Alternatively, this field shows a low
battery indicator.

Fig 4-06, Low battery indicator
20Basic Operation

Setup Screen
The setup screen allows to customize basic settings of the
Digilyzer.

Fig 4-07, Setup screen

AUTO POWER OFF defines the time of the automatically switch off
after the last key-press.
AUTO LIGHT OFF defines how long the backlight stays on after
being activated.
PPM OVER THRESH defines the number of full scale values, causinga clipping indication at the ppm meter.
MULTIPLE SETUP allows four users to store their individual settings.
To enable the multiple setup mode, set the corresponding entry to
ENABLE. The next time the Digilyzer is switched on, the user will
have to select the individual setup-ID (1, 2, 3 or 4) in the startup
screen. All parameter settings in all measurement modes are now
stored under this ID at the switch off and are recalled if this ID isselected at the next start up.

Fig 4-08, Multiple user startup screen
21Basic Operation

Fast Access Setup
Some key combinations allow fast access to the most frequently usedsettings. Pressing a hot key combination shows the FAST ACCESSSETUP screen and changes the value. If you don’t remember the key
combinations just press ESC for two seconds and the Fast Access
Setup is displayed.
ESC + on/off,mute/unmute
speaker

ESC + enter,
AGC on/off
ESC + up,higher LCD
contrast

Speakermuted
ESC + down,lower LCD
contrast

ESC + left,
volume down

ESC + right,
volume up

Fig 4-09, Fast access setup screen
The symbolized keypad on the left part of the screen indicates the
hot keys function of the individual buttons. The actual adjustment isshown on the right side of the display.
VOLUME, setting of speaker volume. The volume control and themute/unmute settings do not influence the analog monitoring.
Analog audio signals are made audible with the speaker, but nomeasurement result is displayed. In this way analog audio signals
are immediately indicated to the user. To analyze an analog signal
the Minilyzer ML1 is recommended to be used.
AUT. GAIN CONTROL (AGC), all incoming signals are leveled tothe same loudness, even if the signals are -60 dBF. The AGC
amplifies a signal up to 140 dB, so even dithering noise on a silent
line is audible!
CONTRAST, setting of the display contrast. For the detailed readoutof fast changing display indications, e.g. SCOPE or VU+PPM, an
increased LCD contrast is recommended to be set.
22

Basic Operation

Display Basics
Debugging and analyzing digital audio signals need a few explanation
to be best visualized at the same time. For example, a recorder does
not recognize the incoming signal, so it is important to find out:
•
•
•
•
•
•

Is there a digital or an analog signal on the line?
Is there any audible information on the digital line?
What is the format of the data (consumer / professional)?
Does the signalized channel status correspond to the data?
What’s the level and the frequency of the carrier?
… and much more

In many measurement functions the Digilyzer answers all thesequestions at the same time. For easy readout several screen elements
are available on most functions.

PPM meter
Emphasis

Carrier
information

Quick status
information

Fig 4-10, Screen elements

23

Basic Operation

Carrier Information

Carrier frequency
Carrierlevel

Error indicator box

Fig 4-11, Carrier information
Carrier frequency displays the measured frequency in• Hz• ppm, deviation to the next standard frequency
Carrier level indicates the measured carrier level in Vpp. Levels higher
than 5.0 Vpp are indicated as >5 Vpp.

Application hint:
The carrier level is a robust first approximation of signal quality.
With decent short interconnection cables the carrier level• of an AES3 signal is in the range of 2 to 7 Vpp• of a S/PDIF signal is in the range of 200 to 700 mVpp
With impedance problems involved or with long cables the
AES3 signal level may drop to levels below these values, so
the reliability gets worse.

Error indicator box: The Digilyzer checks the digital signal, its
protocol and recognizes a number of errors. These errors can cause
many audible effects, which should ideally never occur. An error isimmediately indicated by the Digilyzer by filling the error indicatorbox black. Afterwards the box empties within ten seconds.

24

Basic Operation

Following errors are analyzed/visualized in the error indicator box:
• Lock / unlock• Validity bit• Confidence bit (the received data eye pattern opening is less thanhalf of a bit period, indicating a poor link not meeting specs)• Bi-phase mark coding error• Parity error• Carrier level below specification (for AES3 and S/PDIF input)
NOTE

The lock/unlock state is the only available error in the
ADAT format.

PPM Meter

Many measurement functions include a PPM meter, displaying themeasured level peak in bargraph form. The scaling details are:Signalclipping
indication

Channel A

Channel B-60 dBF -10 dBF -3 dBF

0 dBF

Fig 4-12, Bargraph markings

NOTE• For signal levels lower than -60 dBF the vertical line
marked above with -60 dBF remains displayed andchanges for muted signals to three dots.
• The number of full scale values causing clipping
indication can be set in the SETUP menu (PPM
OVER THRESH). By default it is set to threesamples.

25Basic Operation

Emphasis

The Digilyzer does not de-emphase any pre-emphased signals. In
case the incoming signal is marked as pre-emphased in the channel
status, the Digilyzer indicates this with PRE-EMPH displayed below
the PPM meter (at all measurement functions with display space
available).

Indication

Fig 4-13, Emphasis

Quick Status Information

In the measurement functions BIT STAT., VU+PPM, LEVEL and
THD+N the essentials of the channel status information are displayed
continuously:

FormatSampling
frequency

Resolution,
word length

Channelinformation

Fig 4-14, Quick status information
The consistency check is constantly running as a background task.
It highlights any parameter showing inconsistency within the physicalparameter. For example, as shown in the above figure, the resolution
claims to be a 24 bit, but in reality it is lower.
26

Measurement Functions

5. Measurement Functions
Channel Status
Digital audio signals (formats AES3 and S/PDIF) have additional
information called channel status, encoded in the signal bit stream.
The Digilyzer directly translates the contents of the status bits anddisplays the results on the channel status screen, thus enabling theuser to directly read the meanings.
The proper interpretation of the status bits is carried out automaticallyby the Digilyzer. The first bit of the channel status indicates whether
the status bits are configured in professional or consumer format.
The professional format has various additional information encodedin the channel status, whereby in the consumer format, the copy
protection is the major concern. ADAT signals do not carry any
status information, so the display will indicate CHANNEL STATUSNOT AVAILABLE ON ADAT.
To display the complete status information three different pages areavailable:• page 1, main status information• page 2, additional status information• page 3, status information in hex code
The page number is displayed at the top center of the measurement
screen. Select the page number with the cursor and press enter toselect the next page.

27

Measurement Functions

Professional Format
Page number

StatusmemoryFormatData coding
Fs locked
Sampling frequ.
Fs scaling

Signal emphasis
Channel mode
User bit format
Auxiliary bit use
Word length

Fig 5-01 Channel status professional, page 1

Page number

StatusmemoryLevel alignment
Reference signal
Time of day
Sample code
Data origin/destination

Data reliability
Cyclicredundancycheck

Fig 5-02 Channel status professional, page 2

Further details to the individual status indications are listed in the
appendix.

28

Measurement Functions
Page number

ColumnnumberRow number

Fig 5-03, Channel status professional, page 3

On the third page the complete status information is displayed as hex
code. The content of each status byte is shown as two digits in hex
code. The status information contains 24 bytes. These are displayed
within three rows and eight columns. The individual row- and column
numbers shall be added together to read the information containing
in the corresponding byte number.
e.g.

row number + column number=08
10 (hex)

=
=
=

+
+
+

4
6
2

byte number
4
14
18

Application hint:
There are many undefined and reserved bit combinations in thechannels status. The HEX view offers the possibility to further
examine the reserved states - if necessary.

29

Measurement Functions

Consumer Format
Page number

StatusmemoryFormatData coding
Sampling frequ.
Clock accuracy

Channel mode
signal emphasis
Source number
Channel number
Word length

Fig 5-04, Channel status consumer, page 1
Page number

Category code
Copy protection
Original fs

Fig 5-05, Channel status consumer, page 2
On page two are the fairly complex category tables, providing simple
device statements, such as e.g. LASER OPTICAL PROD or MINIDISC SYSTEM, interpreted into words and letters for easy read out.
The original sampling frequency field is used to indicate the fs of thesignal prior sampling frequency conversion in a consumer playback
format.
Page three displays the complete status information as hex code.

30Measurement Functions

Consistency Check

The consistency check is constantly running as a background task. It
compares the carrier information with the status information. E.g. thesampling frequency claims to be 44.1 kHz but in reality is 48.0 kHz.
Such errors are immediately displayed via a flashing square aroundthe individual status information.

Measuredsampling
frequency

Wrong sample
frequ. status
information

Fig 5-06, Channel status consistency check

The consistency check is carried out with the following parameters:• Sample frequency• Word length• Clock accuracy• 1C2f usage
Application hints:• Wrong signalization of the sample frequency of digital audio
devices may cause real trouble.
• Some units expected to be e.g. 24 bit devices, signalize 24
bit in the channel status but only send 22 relevant bits. The
consistency check helps to see this problems quick andeasy.

Channel Status Details

Detailed information about the interpretation of each individual bit andbytes may be found in the normative documents IEC 60958-3 and
AES3. A summary is given in the appendix.
31

Measurement Functions

Channel Status Comparison

Both channels of an AES3 or S/PDIF signal have their individual
channel status information. In 99% of all applications the content is
identical. In case of any difference the small square indicators in frontof each label would turn into triangles and constantly toggle.
Channel A
selected

Different status
information ofchannel A and B

Fig 5-07, Channel status comparison

Channel Status Memory

The current channel status information may be stored and recalled.

RecallmemoryStore actual
statusFig 5-08, Channel status memory field
Select STO with the cursor and press enter to store the actual status
information. If any bit in the status is now altered compared to thecurrently stored status, the square flag on the left side of RCL will turninto the toggling triangle, indicating discrepancies. By selecting andholding RCL the memorized status information may be recalled for aquick check of the status difference. The status memory remains also
valid after switching off the device.
32

Measurement Functions

Bit Statistic
The bit statistic function visualizes the state of all bits in the digitalaudio signal.
VUCP data

Actual word
lengthAudio data,channel A,
channel B

Auxiliary bits

Fig 5-10, Bit statistic panel
The display allows you to see quickly which bits of the audio data arepermanently low (0), high (1) or changing (indicated via the up/downarrow symbol).
Actual word length: The actually measured resolution isdisplayed.
VUCP data: The following bit information is displayed:• V, validity bit indicating whether the digital audio bits may
be converted to an analog audio signal; if the validity bit ispermanently 0, the incoming data is valid.
• U, user bit containing any user bit information.
• C, status bit containing the channel status information, this bit
is normally changing.
• P, parity bit, plausibility check of actual subframe, this bit isnormally changing.
Auxiliary bits: These bits may be used for• Audio data
• 2nd channel, e.g. talk back33

Measurement Functions

Audio data: The two lines represent the 20 bit audio word for bothchannels.
• LSB on the left side, least significant bit• MSB on the right side, most significant bit
The right bits always have to be active. In case some of the left bits
are constantly 0, the resolution of the audio signal is obviously lessthan the maximum of 24 bits (including the aux. bits). The numberof arrows from right to left may be counted to find the actual word
length or binary resolution.

Application hints:• Any digital input signal causes that some of the MSB’s areactive. The Digilyzer counts the number of active bits anddisplays the result as actual word length.
• Sometimes bits of the input signal are stucked on “0“ or “1“.
In such a case a device in the signal chain is defective, e.g.
a receiver or a transmitter.

34

Measurement Functions

Logger
The event logger records any irregularity of the digital signals. Besides
the common expectations events such as change of sampling
frequency, word length, consistency check results and many moreare covered.
What is an event?
Events are changes or irregularities of the input signal. They are
acquired for the two channels separately (wherever reasonable) andare split into the following categories:• Carrier based events• Frame based events• Audio signal based events• Channel status based events• Consistency check based events

Basics of logging
Whilst a log is running, the Digilyzer acquires all events (details arelisted in the Appendix). The Digilyzer bundles all events which are
occurred within the recording interval. It generates a new “record”
when a recording interval has finished. The recording interval can be
adjusted at the start of a new log.

Basic setting of logger data

Recordfield
RecordingintervalCalculated
maximum
recording
lengthFig 5-20, Recording setup window
35

Measurement Functions• Select the REC field, press enter and the RECORD window isdisplayed.
• Select the recording interval of the recording. The max.
recording length is defined by this resolution. The Digilyzer has
the capability to store data of 500 recording intervals. A higher
recording interval is causing a shorter maximum recording
length.
• Select and confirm GO! to start the logger function. The
recording setup window disappears and the REC field is
flashing.
• The logging may be stopped by pressing the enter key at the
REC field.
Sum of all
events in
event list

Display interval

Mask frame
Sum of event
occurances

Event name

Event list

Fig 5-21, Overview records
Display interval: The events occurred during the user defineddisplay interval are summarized and shown on the Digilyzer. The
bundling of logger data helps to make the events more clear andeasy to overview.
After the logging is completed the display interval may bechanged.
• Zoom out the intervals, e.g. the error log has a recording intervalof ten seconds and you want to know how many events havebeen found in the last hour, just zoom out to a display intervalof one hour.
• Zoom in to get a more detailed information about the time ofindividual events occurred.
• Set to ALL (maximum zoom out) to get an overview of allrecords.
36

Measurement Functions

Displaying events
The display of the event logger is split into three areas:Basicsetting
Event list
Loggerinfo line

Fig 5-22, Detailed info of records

Event list: After the cursor is navigated to the event list, it canbe scrolled with the up/down key. In this mode the data can bezoomed by using the left and right arrow keys. Press ESC to quit
the event list.
Logger info line: While the cursor is in the event list, the individual
detailed information to the selected event is displayed. Many errors
may occur on channel A or B separately (e.g. AU OVERLOAD)
and be indicated.

37

Measurement Functions

Masking events
For a better overview some events can be hidden from the logging
display (e.g. the audio signal clips very often or the channel statuschanges permanently because of time code). Therefore, the Digilyzer
offers you the possibility to select which events you want to see or
hide. Select the field MASK to enter to the LOGGER DISPLAY MASK
screen.

Event visible atevent list

Eventcategories

Event masked(not visible atevent list)

All masking
on/offFig 5-23, Logger display mask

The first column displays all event categories. The complete event
category or single events of each category can be masked. The filledsquare indicates that the event is displayed at the event list.
NOTE

Masking does not effect the recording.
All events are logged at anytime.

Overview of used event coding
See Appendix.
Application hint:
To read out one specific event only
- select in the LOGGER DISPLAY MASK the ALL ON/OFF fieldand press enter -> all squares will be empty- select the specific event you are looking for, press enter and thespecific square is filled up
38

Measurement Functions

VU+PPMThe Digilyzer offers a combined VU and PPM meter for two channels(stereo). This combination enables a quick and accurate overview on
the momentary peak level and RMS value (power of the signal, whichtends to be an indication for the volume).

Numerical
peak hold
Channel A

Overindicator

Channel B

Peak holdfor PPMVU meter(thick bar)

PPM meter(thin bar)Fig 5-30, VU+PPM panel
Numerical peak hold indicates the all-time max. input peak levelof each channel since the VU+PPM mode has been entered. It
may be reset by placing the cursor on this value and pressing
the return key.
Over indicator: Clipping indication; the number of full scale valuescausing this clipping indication may be adjusted in the SET menu
(PPM OVER THRESH).
VU+PPM Indication: Digilyzer features• VU, volume units indicated as the thick bar; displays the averagevolume level of the audio signal.
• PPM, peak program meter indicated as the center bar; displays
the peak level of the audio signal.

39

Measurement Functions

Application hint:
Broadcast levels are limited to a maximum output peak level. This
is in order to not to overload the transmission lines and to avoid
unpleasant and audible distortions. During tuning through the radio
stations it is clearly noticeable, that some channels are much louder
than others; purposely to increase awareness!
This is accomplished by using compressors and other dynamic
signal processing devices. The intention is to make the material as
loud as possible without exceeding the maximum peak level. Simply
feed the digital audio signal into the Digilyzer and it displays for bothchannels the peak- and VU-levels. The closer the VU level is to the
PPM level, the higher is the compression of the audio material.

40Measurement Functions

Level Measurement
The Level menu features three different measurement selections tochoose from:• Level peak
• Level RMS• Level sweep

Fig 5-40, Level selection menu

Level peak measurements indicate – thought digitally – the maximum
number (value) of the input signal.
Level RMS measures the power of the signal. The RMS functions of
the Digilyzer such as Level RMS, sweep and THD+N are available
as single channel functions only.
Level sweep, based on RMS measurement.

Application hint:
In digital audio the level peak measurement is basically mostly used,while in the analog area RMS values are important. Whenever you
want to make measurements in the area of “frequency response”,
RMS is usually the correct choice.

41

Measurement Functions

Level Peak
The Level peak function displays the actual peak value of theincoming digital audio signal. The digital peak level measurement
provides information about the peak-to-peak signal level, compared to
the full scale of the converter. The result is displayed simultaneously
for both channels in numerical letters and in analog form, indicatedin a bargraph.

Channelindication

Resultand unit

Fig 5-41, Level peak screen

Result and unit: The peak level can be displayed in three differentunits• dBF (decibel full scale)• % (percent of full scale)• x1 (number, e.g. 0.1 of full scale)
The peak level units refer to the maximum possible level of thedigital signal (100% or 0 dBF).

Application hint:
To measure the peak level during a period of time, use the VU+PPM
function and monitor the numerical peak hold values.

42Measurement Functions

Level RMS
The analog Level RMS function measures the RMS level of the digital
input signal. Since the Digilyzer has no information about the reference
voltage, such as the• value to digitize the analog signal• value to convert the digital signal into the analog domain
The RMS values are displayed as relative numbers compared to asine wave signal with 0 dBF (peak value).

Resultand unit

Display mode

FilterAudio frequency

Fig 5-42, Level RMS
Result and unit: The RMS level of the individual selected channel
can be displayed in three different units:• dBr (decibel relative)• % (percent of full scale)• x1 (number)
In case the measured RMS value is smaller than -100 dBr, theDigilyzer displays “<-100 dBr“.
Filter: The audio signal decoded from the digital audio stream canalternativelly be filtered with the following filters prior to the RMS
or THD+N calculations:• HP400, highpass 400 has a good rejection in the area of mainfrequencies – so hum problems may be easily examined andlocalized. The HP400 is also used to measure quantizationnoise.
• 22-22k, bandpass 22-22k is used to define the commonly usedmeasurement bandwidth from 22Hz to 22kHz.
43

Measurement Functions

Display mode: Giving a better readability the display mode
determines the rapidity of following up the input signal changes.
The available modes are:
• SLOW
3 seconds averaging• NRM		1 seconds averaging• FASTno averaging
If averaging is active, measurements are smoothed in an exponential
way (exponential time constant) before being displayed.

44

Measurement Functions

Level Sweep
The Digilyzer supports a RMS based frequency sweep. This function
can be applied to measure the frequency response of devices.
During a frequency sweep, the Digilyzer records the Level RMS of
every input signal, that has a stable frequency and level, provided thatthe frequency is higher than the one of the previous sample (otherwise
the sample will be neglected).

Arrow mode
Zoom
Y-ScaleArrow readout

Fig 5-43, Frequency sweep graphWithin a graph every recorded sample is connected by a straightline approximately to the previous / next sample, thus building thedisplayed curve.
In practice the following steps are required / available for the executionof a frequency sweep.
• Arm the sweep recording process by moving the cursor to the
REC field and pressing the enter key.
• The DL1 detects the start tone (315 Hz or 1 kHz) of an external
sweep and the recording is automatically started. This status
is indicated by the flashing REC field.
Alternatively, the sweep recording may be started manually
by pressing the enter key with the cursor on the ARM field.
Consequently, the DL1 records every incoming signal with ahigher frequency than the previous sample.
45

Measurement Functions• The sweep recording will be stopped when as soon as an input
signal with a lower frequency occurs or manually by the enterkey pressed again (cursor on the flashing REC field).
• In order to analyze the sampled curve more detailed activate thearrow mode by placing the cursor to the corresponding symbol.
Press the enter key and move the arrow to the sample(s) ofinterest by using the left / right keys.
• To zoom in/out the Y-axis move the cursor to the zoom mode
field, press enter and use the left / right keys.
• To scroll through the Y-axis move the cursor to the zoom mode
field, press enter and use the up / down keys.
The last recorded sweep curve will be stored internally, even after
leaving the sweep mode or switching off the Digilyzer. As soon as
the frequency sweep mode is re-entered, the curve will re-appear on
the graph until a new frequency sweep is started.
NOTE

The auto power off is disabled during a frequency
sweep recording.

Test signal:
The sweep measurement can be carried out by using the sweep
signal produced by the Minirator or other external sweeps with thefollowing pre-conditions:
•
•
•
•
•

Signal type:		
Step time: 		Frequency step:		
Max. number of steps:
Start frequency:		

Stepped sweepmin. 1 second / stepmin. 1% increase
160
20 Hz

46

Measurement Functions

THD+N
The THD+N function (Total Harmonic Distortion+Noise) calculates
the deviation of the input signal from an ideal sine wave. Thismeasurement is most important to check and qualify analog/digitalconverters.

THD+N
resultFull scale
indication

Display mode

FilterFundamental
frequency

Level RMS

Fig 5-50, THD + N screen
The Digilyzer is able to calculate THD+N values down to –100dB(0.001%). For better THD+N values “< -100 dB“ (< 0.001%) aredisplayed.
THD+N results of the selected channel may be displayed in dB or %.
Full scale indication appears whenever one sample reaches fullscale. This indication is independent of the clipping of the PPM
meter.
Filter: The audio signal decoded from the digital audio stream canbe filtered with the following filters prior to the RMS or THD+N
calculations:• HP400, highpass 400 has a good rejection in the area of mainfrequencies – so hum problems may easily be examined andlocalized. The HP400 is also used to measure quantizationnoise.
• 22-22k, bandpass 22-22k is used to define the commonly usedmeasurement bandwidth from 22Hz to 22kHz.
47

Measurement Functions

Display mode: Giving a better readability the display mode
determines the rapidity of following up the input signal changes.
The available modes are:
• SLOW
3 sec. averaging• NRM		1 sec. averaging• FASTno averaging
If averaging is active measurements are smoothed in an exponential
way (exponential time constant) before being displayed.

Application hints:• Whenever one sample reaches full scale, slight clipping of thesignal is possible so the THD+N value may degrade. Therefore,
try to level the signal so the full scale indication does notappear.
• An analog to digital (A/D) converter may show the following
errors at the signal conversion:• The imperfect linearity of the converter adds (hopefully little)
new harmonics to the signal.
• Every analog part generates noise which is added to thesignal during conversion.
• An A/D converter has only a finite resolution (e.g. 16 bit), so
the converter must round each sample value, which results
in an error called quantization noise.
A perfect test signal fed into an ideal A/D converter causes a
THD+N of the digitized signal of theoretically-N * 6.02 dB - 1.76 dB(N ... bit resolution of the converter)

E.g. a 16 bit converter has a theoretical THD+N of -98.08 dB.
In practice good converters (even 24 bit) do not achieve better
values than -110 dB. With such measurements the input signal
is often the limiting point. To measure THD+N down to -100 dB
a generated sine wave with a THD+N better than -100 dB is
required. Such a sine wave is often generated only by expensive,
special audio analyzing equipment.

48

Measurement Functions

Scope
The scope shows the waveform of the input signal. It measures the• dominating fundamental frequency• momentary peak level
and adjusts the X and Y-axis scaling automatically.

Pause
Y-Axisscale

Actuallevel peak

Fundamental
frequency

X-Axis scaleFig 5-60, Scope screen
Y-Axis scale: Automatic scaling from 25%/div to 0.1ppm/div (allowing
to see the LSB of a 24 bit signal).
Actual level peak: Since it is sometimes difficult to get a feeling forvalues of e.g. 0.6 ppm, the actual peak level of the data shown on
the screen is displayed in dBF.
X-Axis scale: Automatic scaling from 1 to 500 samples per
division.
Pause: The scope display may be paused by selecting this field withthe cursor and pressing the enter key.
Fundamental frequency: The input signals that fundamental or mostdominant frequency are displayed.

NOTE

The scaling of the SCOPE display cannot be changed
manually.
49

Troubleshooting

6. Troubleshooting
In case the Digilyzer is malfunctioning the software may be reset tofactory set up as described below.

System Break Down
• Switch off the device.
• Reset the Digilyzer to the default status by pressing the ESC
button and switching on the Digilyzer simultaneously.
• Release the ESC button.
• The below screenshot will appear on the display stating on thebottom line LOADING DEFAULT SETUP.
• Verify the correct operation.

SoftwarereleasenumberSerial number

Fig 6-01, Start up screen loading default setup
In case you find system breakdowns happening several times or yourdevice is malfunctioning, please note serial number and software
release number and contact the local NTi Audio representative inyour country.
For contact details see the NTi Audio web page: www.nti-audio.
com

Monitoring
In two channel measurement functions (e.g. Level peak) the monitoringsignal of channel A and B are mixed together (stereo). In case oneof the channels is muted the stereo monitoring signal has a reduced
level.
50

Accessories

7. Accessories
MiniLINK
MiniLINK allows documentation anddata acquisition of all DL1 functions inconjunction with the easy to use MiniLINKPC software.
MiniLINK is an upgradeable kit for all
existing and new Digilyzers. It consists ofa small plug-in USB interface board thatcan be easily installed without any tools.
MiniLINK allows• Storing measurement results andscreenshots into the DL1 flash memory• Logging on-line measurement results
onto the PC

Fig 7-01, MiniLINK

Mains Power Adapter
The Digilyzer can be powered by batteries
or by an external power. This power
adapter is ideally suited for external power
supply. Applicable for european connector
types only.
Fig 7-02, Mains power adapter
Cable length = 2 meter.

51

Accessories

Pouch
The soft pouch protects the
Digilyzer against shocks, dust andwater. With its convenient belt-clip
you can keep it close to you evenwhen you need both hands forother tasks.
Fig 7-03, Pouch

Minstruments System CaseStore your valuable Minstruments test
system consisting of the Digirator andthe Digilyzer DL1 adequately inthe compact system case which
gives you extra space for cables,
connectors and other accessories
you wish to bring along when you
are ‘out in the field’ checking audio
systems.

52

Fig 7-04, System caseAppendix

8. Appendix
1C2f Format
The AES3 standard includes the following two options for 96 kHz
sample rate operation:• To double the frame rate from the previous 48 kHz to 96 kHz(not possible for older equipment). This is the normal operationof the Digilyzer.
• Using the two sub-frames (two channels) of a 48 kHz frame
rate AES3 signal to carry consecutive samples of a mono signal
resulting in a 96 kHz sample rate stream. The samples of one
96 kHz signal are packed “interleaved” into two 48 kHz signals.
This allows older equipment, which transmitters and receivers
are not rated for 96 kHz frame rate operation, to handle 96 kHz
sample rate information.
This mode is called “single channel double frequency mode” or“double wire mode” (two AES3 cables are needed for stereo).
The Digilyzer also enables measurements in this mode. Just
select the input format 1C2f and the input channel menu will
indicate “A i B” (or eg. “1 i 2” for ADAT). This indicates thatchannel A and B are used in an interleaved manner (1C2fmode).
A and B are
interleaved

Fig 8-01, 1C2f selection
The Digilyzer is specified for samples rates up to 96 kHz, so for
a 1C2f signal the resulting sample frequency shall not exceed
this value.
53

Appendix

NOTE• The second channel (e.g. B) is invalid in the
1C2f mode. This is indicated in the measurement
functions like LEVEL PEAK as “—“ or with a verysmall value.
• The 1C2f format is displayed as part of the channel
status menu in the professional format. At many
applications this information is not configured in thechannel status details of the digital audio signal.
• The 1C2f mode is part of the consistency check. In
case the channel status indicates 1C2f mode and
1C2f mode is not selected in the format menu or viceversa, the consistency error window is displayed.
• 1C2f mode is defined for AES3 professional mode
only. The Digilyzer supports the 1C2f mode also inthe consumer and ADAT format. No monitoring isavailable for ADAT signals.

Fig 8-02, 1C2f with ADAT format• The DL1 allows you to switch to 1C2f mode even
if the input sample rate is higher than 48 kHz. Thismay cause the DL1 to unlock to the input signal – or
could exceed the processing power of the Digilyzer.
This is indicated as “CARRIER FREQUENCY TO
HIGH” in the quick status information on the bottomof the display.

54

Appendix

Logger Event Coding
The following chart lists all details to the Digilyzer Logger event coding.
The remark column states:• Any format not applicable (n.a.) for the individual events• Maximum amount of events indicated per second (rec./s) or“sample“ (= each sample is counted)
DL1 eventdescription

remarkCarrier based events
CR UNLOCKCR LOCK

Digilyzer is not able to lock to the
input.

10 rec./s

CR FS TO HIGH Sample frequency in 1C2f mode is
to high.

10 rec./s

CR
CONFIDENCE

The received data eye patternopening is less than half of a bit period(problems on the transmission line).

10 rec./s

CR BI-PHASE

Violation of the biphase-mark format n.a. ADAT,of the carrier signal.
10 rec./s

CR LEVEL

A change of the carrier level greater n.a. ADAT
than 100mV generates this event. &TOSlink,
Details about the carrier level (aver- 1 rec./s
age, min. and max. carrier level) arealso acquired.

CR
FREQUENCY

A change of the carrier frequency
greater than 1 Hz generates thisevent. Details about the carrier frequency (min. and max. carrier frequency) are also acquired.

1 rec./s

Frame based events
FR VALIDITY

Validity bit set. This happens e.g. n.a. ADAT,at a CD player with active error sample
correction.
55

Appendix

DL1 eventdescription

remarkFR PARITY

Parity error. The parity of the received n.a. ADAT
signals is not correct (problems on the 10 rec./stransmission line).

FR
BLOCKCRCC

CRCC Error. The CRCC of the n.a. ADAT
channel status information is incorrect 10 rec./s(problems on the transmission line).
Audio signal based eventsAU
OVERLOAD

A clipping in the audio signal isdetected. The clipping detector isconfigured in the Digilyzer setup
screen. The setting for “PPM OVER
THRESH” is stored within the log.

AU MUTENo audio signal but only zeros have 10 rec./sbeen found.

sampleAU WORDLEN The measured word length or the 10 rec./s
audio signal has changed (donot confuse with the word length
signalized in the channels status).
Channel status based events
CS CON/PRO

T h e p r o f e s s i o n a l / c o n s u m e r n.a. ADAT,
indication bit in the channel status 10 rec./s
has changed.

CS EMPHASIS The emphasis bit of the channel n.a. ADAT,
10 rec./sstatus has changed.
CS
FREQUENCY

The signalized sample frequency in n.a. ADAT,
10 rec./s
the channel status has changed.
56

Appendix

DL1 eventdescription

remarkCS WORDLEN The signalized word length in the
n.a.
channel status has changed.
ADAT, 10rec./sCS CHA<>CHB The status of channel A is not equal tothe channel status of channel B.

n.a.
ADAT,
10 rec./s

CS OTHER

n.a.
ADAT,
10 rec./s

Other bits than those mentioned inthis table changed in the channel
status.
Consistency check based eventsIC
FREQUENCY

The sampling frequency indicated in
the channel status is not equal to themeasured sampling frequency.

n.a.
ADAT,
1 rec./s

IC WORDLEN

The world length indicated in thechannel status is not equal to themeasured word length.

n.a.
ADAT,
1 rec./s

IC FREQPPM

The measured accuracy of thesampling frequency is worse than
the accuracy indicated in the channel
status (consumer mode only).

n.a.
ADAT,
1 rec./s

IC MODE1C2f

In the professional format the 1C2f
mode should be signalized whenused. This event occurs if the pro
channel status signalizes a 1C2f
mode but the Digilyzer is not set to
1C2f mode or vice versa.

n.a.
ADAT,
1 rec./s

57

Appendix

Professional Format Coding
Overview of codings and abbrevations used for the professional
channel status display (MSB left).
Byte

Bit

Bit-info00

Use of channel status
0
CONSUMER
1PROFESSNAL

1

Data coding
0
LINEAR PCM
1NO LIN PCM

Linear PCM samples
No lin. PCM samples

2-4

Audio signal emphasis
000
EMPH NO ID
001
RES.EMPHAS
010
RES.EMPHAS
011
RES.EMPHAS100
NO EMPHAS.
101
RES.EMPHAS
110
50/15uS EM
111
CCITT EMPH

Emphasis no ID
Reserved
Reserved
Reserved
No emphasis
Reserved
50/15 ms emphasis
CCITT emphasis

5

Locking of source sample frequency
0
LOCK NO ID
1
UNLOCKED

Locked (condition
not indicated)

6-7

Sampling frequency
00
see byte 4, bit 3-601
FS=48.0kHz
48.0kHz10
FS=44.1kHz
44.1kHz11
FS=32.0kHz
32.0kHz

0-3

Channel mode
0000
CHNL NO ID
0001
TWO CHANNL
0010
SINGLE CHN
0011
PRM/SEC CH
0100
STEREO CHN
0101
CH MOD RES
0110
CH.MOD RES
0111
1CH FS*2 M
1000
1CH FS*2 L
1001
1CH FS*2 R
1010
CH.MOD RES

1Digilyzer
Channel status Quick view

58

CON
PRO

----2-CHN
1-CHN
PR/SE
STREO
--------FS*2
FS*2L
FS*2R
-----

Explanation

Consumer format
Professional format

Mode not indicated
Two channel mode
Single channel mode
Primary/sec. mode
Stereophonic mode
Reserved
Reserved
1C2f mode
1C2f, stereo left
1C2f, stereo rightReserved

Appendix
Byte Bit12

0-3

Bit-info

Digilyzer
Channel status Quick view

1011
1100
1101
1110
1111

CH MOD RES
CH MOD RES
CH MOD RES
CH MOD RES
see byte 3-----------------

Explanation

Reserved
Reserved
Reserved
Reserved

4-7

Userbits management
0000
UDAT NO ID
0001
UDAT 192 B
0010
UDAT AES18
0011
UDAT USRDF
0100
UDAT 60958
othersUDAT RSRVD

No user information
192 bit block structure
AES18 standard
User defined
Conforms to IEC
Reserved

0-2

Use of auxiliary sample bits000
AUX NO DEF001
AUX 24BIT
010
AUX TLKBCK011
AUX USRDEF
others
AUX RESRVDUse not defined
Use for main audio
Use for talkback
User definedReserved

3-5

Audio sample word length000
WLEN NO ID
001
WLEN 23BIT
010
WLEN 22BIT
011
WLEN 21BIT
100
WLEN 20BIT
101
WLEN 24BIT
110
WLEN RSRVD111
WLEN RSRVD
000
001
010
011
100
101
110
111

6-7

WLEN NO ID
WLEN 19BITWLEN 18BITWLEN 17BITWLEN 16BITWLEN 20BITWLEN RSRVDWLEN RSRVD

Indication of alignment level00
ALGN NO ID
01
ALGN SMPTE
10
ALGN EBU11
ALGN RSRVD
59----23BIT
22BIT
21BIT
20BIT
24BIT
------------19BIT
18BIT
17BIT
16BIT
20BIT
---------

applicable if byte 2,
bit 0-2 is “100“

Reserved
Reserved
applicable in allother cases

Reserved
Reserved
Not indicatedAcc. to SMPTE RP155
According to EBU R68
Reserved

Appendix
Byte

Bit

Bit-info

Digilyzer
Channel status Quick view

3

0-2

Channel identification000
MCMD0 CH
001
MCMD? CH010
MCMD2 CH011
MCMD? CH
100
MCMD1 CH101
MCMD? CH110
MCMD3 CH
111
MCUSR CH4

0-1

Digital audio reference signal
00
NO REF SIG
01
GRAD 1 REF
10GRAD 2 REF
11REFS RSRVD

3-6

Extended sampling frequency
0000
FS NO ID
FS_NOID Not indicated0001
FS RESERVD
FS_RSVD Reserved
0010
FS RESERVD
FS_RSVD Reserved
0011
FS RESERVD
FS_RSVD Reserved
0100
fs=96kHz
96.0kHz0101
fs=88.2kHz
88.2kHz0110
FS RESERVD
FS_RSVD Reserved
0111
FS RESERVD
FS_RSVD Reserved
1000
fs=24kHz
24.0kHz1001
fs=22050Hz
22050Hz1010
FS RESERVD
FS_RSVD Reserved
1011
FS RESERVD
FS_RSVD Reserved
1100
fs=192kHz
192kHz1001
fs=176400
176kHz1110
FS RESERVD
FS_RSVD Reserved1111
FS USERDEF
FS_USER User defined7

Sampling frequency scaling flag0
FS * 1.000
1FS / 1.001

60

MCMD0
----MCMD2----MCMD1----MCMD3
MCUSRExplanation

Mode 0Reserved
Mode 2
Reserved
Mode 1
Reserved
Mode 3User defined
No reference signal
Grade 1 ref. signal
Grade 2 ref. signal
Reserved

No scaling
Scaling 1/1.001

Appendix

Consumer Format Coding
Overview of codings and abbrevations used for the consumer
channel status display (MSB left).
Byte

Bit

Bit-info00

Use of channel status
0
CONSUMER
1PROFESSNAL

1

Data coding
0
LINEAR PCM
1NO LIN PCM

2Copyright
0
1

3-5

Emphasis000
100
othersDigilyzer
Explanation		
Channel status Quick view
CON
PRO

Consumer format
Professional format
Linear PCM samples
No lin. PCM samples

COPYRIGHT ASSERTEDNO COPYRIGHT ASSERTED
2-CHANNEL
NO EMPHAS.
2-CHANNEL
50/15uS EM
RES FMTINF----------Emphasis notindicated
50/15 ms emphasis

10-7

Category code
Includes information about the equipment type,e.g.
MINI DISK SYSTEM,MD PLAYER / RECORDER, ...

2

0-3

Source number
0000
SOURCE : ?
othersSOURCE : (number 1..15)

4-7

Channel number
0000
CHANNEL: ?
othersCHANNEL: (letter A..O)

0-3

Sampling frequency
0010
FS=22050Hz
0000
FS=44.1kHz
0001
FS=88.2kHz
0011
FS=176400

36122050Hz44.1kHz88.2kHz
176400Appendix
Byte

Bit

Bit-info

Digilyzer
Explanation		
Channel status Quick view

3

0-3

0110
0100
0101
0111
1100
1000
others

FS=24.0kHz
FS=48.0kHz
FS=96.0kHz
FS=192kHz
FS=32.0kHz
FS NO IDFS RSRVD

3

4-5

Clock accuracy
00
ACC:LVL2+-1000PPM
01
ACC:LVL3
VARIPITCH
10
ACC:LVL1+/- 50PPM
11
ACC:RSRVD---------

4

1-3

Word length000
WLEN NO ID
001
WLEN 23BIT
010
WLEN 22BIT
011
WLEN 21BIT
100
WLEN 20BIT
101
WLEN 24BIT
110
WLEN RSRVD111
WLEN RSRVD
000
001
010
011
100
101
110
111

4

4-7

WLEN NO ID
WLEN 19BITWLEN 18BITWLEN 17BITWLEN 16BITWLEN 20BITWLEN RSRVDWLEN RSRVD

24.0kHz
48.0kHz96.0kHz
192.0kHz
32.0kHz
FS_NOID
FS_RESERVD----23BIT
22BIT
21BIT
20BIT
24BIT
---------

applicable if byte 4,
bit 0 is “1“----19BIT
18BIT
17BIT
16BIT
20BIT
---------

applicable if byte 4,
bit 0 is “0“

Original sampling frequency
1111
ORIGNAL FS=44.1kHz
1110
ORIGNAL FS=88.2kHz
1101
ORIGNAL FS=22050Hz
1100
ORIGNAL FS=176400
1011
ORIGNAL FS=48.0kHz
1010
ORIGNAL FS=96.0kHz
1001
ORIGNAL FS=24.0kHz
1000
ORIGNAL FS=192kHz
62

Appendix
Byte

Bit

Bit-info

Digilyzer
Explanation		
Channel status Quick view

4

4-7

Original sampling frequency
0111
ORIGNAL FS RESVD_7
0110
ORIGNAL FS=8.0kHz
0101
ORIGNAL FS=11025Hz
0100
ORIGNAL FS=12.0kHz
0011
ORIGNAL FS=32.0kHz
0010
ORIGNAL FS RESVD_2
0001
ORIGNAL FS=16.0kHz
0000
ORIGNAL FS: NO ID

63

Technical Specification

9. Technical Specification
Frame
		

Consumer / Professional, up to 24 bit,
Sampling frequency fs = 32 – 96 kHz,		

Also supports: Interleaved 96 kHz modeon all inputs (single channel double
sampling frequency modes)

Measurements
SignalLevel-FS, level-RMS, signal frequency,
THD+N, event logger, frequency sweep,				

PPM, scope, overload detection,
Full-Scale detection

Carrier		Sampling frequency (accuracy ±2.5 ppm),
carrier level

Frame
		
		

Channel status according to AES 3(ed. 2003) and IEC 60958-3 (ed. 2003),
bit statistics

Event logger
Recording resolution selectable 1”, 10”, 1’, 10’, 1h
Recording duration selectable 8’, 83’, 8h, 83h, 20days
Display Δt1”, 10”, 1’, 10’, 1h, 10h, 24h, all
Recording intervals max. 500
Single errors in one
recording interval
Input connectors
		

10 - 36 000
AES 3 (110 Ohm) XLR, S/PDIF (RCA),TOS-Link, ADAT,		AES 3id (75 Ohm) using Chinch-BNC
adapter, phantom power resistant

Monitor

Built-in speaker, headphone connector

Display
Power supply				

Backlit graphic LCD- 3x AA size dry batteries (alkaline),
typical lifetime 8 hours- External DC power, 7.5 VDC, 500 mA,
stabilized, use NTi Audio recommended
parts only		64

Dimensions (L x W x H) 163 x 86 x 42 mm (6.4“ x 3.38“ x 1.63“)Weight

300 g (10.5 oz) incl. batteries

Temperature

0° to +45° C (32° to 113° F)

Humidity< 90 % R.H., non condensing

Protection Rating

IP51

65

Quick Guide
Digilyzer



EscapeOn / Off (2 sec)

Enter /
Cursor keys

Measurement Function Menu:
CHANNEL STATUS
BIT STATISTIC

PAGE 1
PAGE 2
PAGE 3

LOGGER
VU + PPM

THD + N
SCOPE

PEAK
REL
SWEEP
dth 500 - 10.14

LEVEL