TT7000
 Device Overview

Basic Setup and User Guide

 Unit Power-up
 Notes and Warnings

 Ports and Controls
 System Modes Remote Operation
 PC Applications
 SCPI Commands
 Contact Info

TT7000 – Introduction to a Compact Multi-Purpose RF Instrument

The TT7000 combines a Microwave Frequency counter, Power Meter,Signal Generator, RF divider, and Prescaler in one compact instrument.
This instrument can either be used as a stand-alone device, or operated
from a PC via USB. The Frequency Counter and Power meter cover theband from 50 to 7000MHz. The Signal Generator covers from 300 to4800MHz.
The TT7000 is very simple to setup and begin to use. Stand-alone usage
only requires a standard 5 volt mini usb cable. This can be powered from aUSB port on a PC, powered USB hub, wall charging adapter, or a lithiumion battery pack. No data connection is needed. Once the device ispowered and the front power button is pressed the device will display thefirmware version and model number. The TT7000 will then boot up into
Dual-Meter Mode and begin displaying the detected RF power level andthe constant wave frequency.

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NOTES AND WARNINGS The MAXIMUM power to the RF input SMA port is +15dBm. Never apply over themaximum level or permanent damage can occur.
 Power measurements will be inaccurate if the automatic counter cannot determine anapproximate frequency. Use the PC GUI to manually enter the frequency range of yoursignal if auto-range is not consistent.
 If the power level is too low or there is no signal input, the frequency counter display willwonder. This is normal functionality.
 The TT7000 requires full USB current of 0.5 Amps. An unpowered USB hub or an
excessively long or low quality USB cable will degrade the device performance. We
recommend a USB 3.0 port, a powered hub, or a short high-quality cable from astandard USB port.

DEVICE PORTS AND FEATURES
Change system mode
buttonPWR STATUS

MODE

ON/OFF5889.7355 MHz

RF Input Signal (SMA)(PWR Meter / Freq Counter)

USB Interface to PC
and DC Power Input

Value step +/- buttons

SG/RF Divider output
Signal (SMA)

USB
PWR

External 10MHz
reference IN (SMA)

10MHz
IN

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STANDALONE USAGE - SYSTEM MODES
Holding down the MODE button for one-half second cycles
to the next system mode. These are comprised of Dual
Meter Mode, Power Meter Mode, Frequency Counter Mode,
Signal Generator Mode, and RF Divider Mode.
1. Dual-Meter Mode: Displays both power level andcounted frequency with quick refresh rate and lowaveraging.

2. Power Meter Mode: Displays a more accurate power
level in dBm with more averaging and longer refresh rate ina larger more readable display size. (-50 to +5 dBm)

3. Counter Mode: Displays the counted frequency input in
MHz with a longer gate time and more precision in a large
font. (50-7000MHz)

4. Signal Generator Mode: Displays the frequency output
on the RF SMA port. Up/Down step buttons change thefrequency. (300-4800MHz)

5. RF Divider Mode: Displays the current divider ratio
between the user s input frequency and the SG SMA output
port. Up/Down Step buttons change the divider ratio (2/4/8).

6. Prescaler Mode (Optional): Displays the current divider
ratio between the user s RF input and the RF signal on theprescaler output port. (16/32/64/128/256)

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Remote Operation via USB
The TT7000 can be remotely operated using SCPI commands via the USB virtual COM port. A
windows GUI application is provided for the Power Meter and Frequency Counter Modes, anda separate GUI application for controlling the Signal Generator Mode. Both are available fordownload on the DS Instruments website and require the .NET framework from Microsoft.
NOTE: Most versions of windows come with .NET and USB drivers pre-installed. If they aremissing or outdated they can both be downloaded from our website.
* Although we do not yet have native control GUIs, Linux and Android along with many embedded operatingsystems have integrated driver support for the TT7000.

Typical User Connections for Remote Operation via USB

USB Power
And Interface

PWR STATUS

DS

ON/OFF5895.821 MHzRFIN

Host PC

RFOUT

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Signal Generator GUI Application

The Signal Generator Control application connects to the TT7000 by selecting a COM port.
The 10MHz reference frequency source defaults to automatic but you can force it tointernal or external if you wish. At this point the output frequency can be set by entering itin the large MHz textbox and clicking apply or pressing enter. RF Output can be enabled or
disabled using the checkbox and apply button once a frequency is set.
The TT7000 signal generator has two output power levels that can be selected in thebooster amp pull-down.

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Power Meter and Frequency Counter GUI Application

The power meter / counter application can simultaneously display the current and historical power
level and input frequency at the RF IN SMA port. As with the signal generator, the counter
reference frequency source can be forced if needed. Auto detect is recommended in mostsituations. A high quality external reference can increase the counter accuracy.
The SYS MODE option lets the user disable the hardware OLED display to gain maximum system
speed and responsiveness in the USB PC Application.

The TT7000 Wideband Power Meter uses the internal frequency counter to calibrate itself. If theinput signal power level is too low and the counter cannot successfully determine the correct
frequency, the power meter accuracy will significantly degrade. In this case the user should enter amanual calibration frequency.
The frequency counter gate time and power meter averaging can be adjusted to the user spreference. Slower update rates average more readings over a longer time, and will result in amore accurate measurement.
When the RUN button is pressed, the TT7000 meter application will continuously display live datafrom the device and build a history graph to the right

A green background inside the meter display indicates a good value. Orange indicates that thesignal is either too weak to count or measure, or that it is not consistent. Red indicates that thepower level is over the maximum readable input level.

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Divider / Prescale Control Application

The Divider Control Application is a simple way to set the RF divider and the Prescaler if it isavailable on the device. The RF divider simply divides the signal detected on the RF Input
SMA port, amplifies it, and makes it available on the Signal Generator RF SMA output port.

The Prescaler has higher divide ratios and outputs the signal on a rear port instead of themain RF output port.
Once the COM port is connected successfully, the user can choose either an RF Divider
ratio or a prescaler ratio.

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Remote Operation via SCPI Commands
For automated or scripted operation the TT7000 can be controlled via SCPI text commands.
The virtual COM port settings are 115200bps, 8 Data bits, 1 stop bit, no parity. Commands
should be terminated with a linefeed character.
Command

Example 1

Example 2

FREQ:CWFREQ:CW 400MHZ

FREQ:CW 3.33GHZ

Set output Frequency

OUTP:STATOUTP:STAT ON

OUTP:STAT OFF

Turn on or off the RF output

POW:AMPL

POW:AMPL 0

POW:AMPL 3

Power output level (uncalibrated) 0-3 range

POW:BOOSTPOW:BOOST ON

POW:BOOST OFF

Description

Booster amplifier on or off

POWER:FETCH?

Returns the input power in dBm

FREQ:FETCH?

Returns the counted input frequency in MHz*SYSMODE x*SYSMODE 1*SYSMODE 2*POWER:FCAL*POWER:FCAL 2000

*POWER:FCAL 0

Sets mode: 1=dua l meter, 2=counter, 3=power, 4=s i ggen
Ma nua l l y s et the freq ra nge for the power meter*IDN?

Return the SCPI identification string*RSTReset unit now*INTREF?

Is the internal reference enabled?

*EXTREF?

Is an external reference signal detected?

*DISPLAY*DISPLAY OFF*DISPLAY ON

Power on of off the display*BUZZER*BUZZER ON*BUZZER OFF

Mute the buzzer*A great free terminal program for windows can be found here : http://www.putty.org

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Technical SupportFor additional questions, suggestions, and technical support please contact us!

DS Instruments Contact Infowww.dsinstruments.com
support@dsinstruments.com(805) 242-6685
Video Tutorials: https://www.youtube.com/channel/
UCc8N904mBm1wWXsLSc4frOw

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