Advanced Science And Novel Technology Company, Inc.
2790 Skypark Drive Suite 112, Torrance, CA 90505

Offices: 310-530-9400 / Fax: 310-530-9402
www.adsantec.com







ASNT6900-MOD64Gbaud PAM4 Data Decombiner with USB Control
External clock input
Built-in high-speed clock recovery from 51 to 64 (Gbaud) data
Built-in high-speed error detector system
USB port for connection to an external PC
Full functional control from GUI software
Single +12V power supply from an external AC-DC converter
High speed 1.85mm connectors for PAM4 differential data input
Low jitter and limited temperature variation over industrial temperature range

Fig. 1. Front and back views of the unit

DESCRIPTION
The ADSANTEC’s differential PAM4 data Decombiner unit can be used for test applications, design
verification, and R&D environments. The fully self-sustained device is integrated in a box with power
conditioning, control circuitry, and a USB computer interface. All signal I/O’s are CML-type. The front panelof the instrument is shown in Fig. 1 (top). It includes connectors as described inRev. 0.0.2

1July 2019

Advanced Science And Novel Technology Company, Inc.
2790 Skypark Drive Suite 112, Torrance, CA 90505

Offices: 310-530-9400 / Fax: 310-530-9402
www.adsantec.com

Table 1.

Table 1. Front-Panel ConnectorsConnector
Name

DESCRIPTION
TypeHigh-Speed I/Os
PAM4 DATA IN P 1.85mm DC-coupled CML differential data output port, requires external SE
PAM4 DATA IN N female 50Ohm terminations to groundThe back panel of the instrument is shown in Fig. 1 (bottom). It contains a power switch (Power), apower supply female connector (+12V DC) for connecting a male 2.5x5.5-barrel jack from anexternal AC-DC adapter (included), and a USB-A connector (USB) for connecting an external PC
with installed Windows GUI control software (USB cable included).
USB
USB Interface

PAM4Decombiner

CLK1_P

PAM4 DATA IN

InputEqualizer

NRZ DATA1NRZ DATA2ED45Error
Detector

CLK1_N
CLK2_P

Fanout Buffer

Clock Splitter
CLK_P

CLK2_N

CLK_N

CLK/2_OUT

DC +12V

Clock Processor
Unit

Power Conditioning

SYNC OUT

Clock IN

Fig.2 Block diagram of the 64Gbaud PAM4 Data Decombiner with USB control
The system consists of four main parts (Fig.2): Input Equalizer, PAM4 Decombiner, High-speed
error Detector, and a Power Supply/USB interface unit.
The Input Equalizer (IE) incorporates the advanced programmable driver amplifier with built-in
four-tap pre-emphasis and external control circuitry; it contains both digital and analog controls to
set signed tap weights for the four delayed copies of the input signal (set apart one clock from eachother by a shift register), which are then summed to produce the output signal.
Rev. 0.0.2

2July 2019

Advanced Science And Novel Technology Company, Inc.
2790 Skypark Drive Suite 112, Torrance, CA 90505

Offices: 310-530-9400 / Fax: 310-530-9402
www.adsantec.com

The processed by the IE incoming PAM4 signal are then handled by PAM4 Decombiner unit toproduce two NRZ signals with half data rate and high-speed clock recovery module yielding highquality system clock used for the entire system operation. The clock phases in PAM4 decombiner
may be individually adjusted via the system’s USB control interface.
The output NRZ signals from PAM4 decombiner directly interfaced to built-in high-speed error
detector unit with data rates up to 33.5Gbps and error detection for industry standard PRBS7,PRBS9, PRBS11, PRBS15, PRBS17, PRBS20, PRBS23, PRBS29, PRBS31. The half rate clock
needed for unit operation is provided by clock recovery module (Fig.1).
All the parameters of this PAM4 Decombiner are controlled by an external PC through a USB port.
A special GUI software is installed on the PC to simplify the system control.

ELECTRICAL CHARACTERISTICS
Table 2. PAM4 Generator Specifications

PARAMETER

MIN

Vcch
Vccm
Vccl
VeePower
Consumption
Data Rate
Input
AmplitudeRev. 0.0.2

1300

TYPICAL MAXUNITGeneral Parameters9-12V5V
3.3V0V
TBDW
Input Data64Gbaud
1000mV3COMMENTPower Supply
Internal Power Supply
Internal Power Supply
External Ground
Based on required system
functionality

Differential pk-pk

July 2019

Advanced Science And Novel Technology Company, Inc.
2790 Skypark Drive Suite 112, Torrance, CA 90505

Offices: 310-530-9400 / Fax: 310-530-9402
www.adsantec.com

(a)

(b)
Fig.3 a). 56 Gbaud/s PAM4 EYE diagram input to ASNT PAM4 Decombiner unit; b) Measured 28Gb/s NRZ EYE diagram at the output of the ASNT PAM4 Decombiner unit with Tektronix Analyzer

Rev. 0.0.2

4July 2019

Advanced Science And Novel Technology Company, Inc.
2790 Skypark Drive Suite 112, Torrance, CA 90505

Offices: 310-530-9400 / Fax: 310-530-9402
www.adsantec.com

MECHANICAL DIMENSIONSPARAMETER TYP
LengthTBD

UNIT COMMENTS
mm

Width

TBD

mm

Height

TBD

mm

REVISION HISTORY
Revision
0.0.2
0.0.1

Rev. 0.0.2

Date
07-2019
01-2018

Changes
Updated Letterhead
Initial release

5July 2019