Siglent SDS1000X-E and SDS800X-HD series Bode Plot

Bode plot with Siglent SDS1000X-E and SDS800X-HD oscilloscopes series and a non-siglent AWG.

Overview

At a certain point after getting the SDS1204X-E oscilloscope I started to wonder if it might be possible to use the Bode plot function with a non-Siglent waveform generator. After some hours of researching and reverse engineering I wrote this Python program which is a small server which emulates Siglent arbitrary waveform generator.

The oscilloscope connects using LAN to a PC running this program. The program makes the oscilloscope think that it communicates with a genuine Siglent signal generator. The program extracts the commands sent to the generator, parses them and translates to the command set, which can be understood by the connected to the PC non-Siglent generator.

The program is written in Python and uses sockets library to connect to the oscilloscope and serial library for connecting to serial AWGs, and the PyVISA-py library for connecting to others.

Current version of the program was tested under Linux and MacOS only. Later, I'll test it under Windows too.

Supported AWG Models

As of June 2024 the program supports the following models:

• Uni-Trend UTG1000x (like the UTG1022X) This is a 2 channel 40MHz AWG. It connects to the PC via USB, but not as "dumb" serial. You must provide a Visa compatible connection string as port. See below.

• Rigol DG800/DG900 series (like DG992) When "liberated", this is a 2 channel 100MHz AWG with USB and (with the suitable adapter) ethernet interface. It is somewhat compatible with the SCPI 1992.0 standard. You must provide a Visa compatible connection string as port. See below.

• BK Precision BK4075 One channel 25MHz AWG. Requires a RS-232 serial port for the connection to a PC. It is compatible with the SCPI 1992.0 standard.

• RD JDS6600 Chinese generator which is widely sold on eBay and AliExpress. It connects to the PC as a USB serial port.

• Feeltech FY6600 Another Chinese generator which is widely sold on eBay and AliExpress. It also connects to the PC as a USB serial port.

• AD9910 Arduino Shield https://gra-afch.com/catalog/rf-units/dds-ad9910-arduino-shield/. It also connects to the PC as a USB serial port.

Program Structure

TBD

Oscilloscope Configuration

Before starting the program you have to tell the oscilloscope how to connect to the waveform generator. Connect your oscilloscope to the same network where your PC is connected. Then go to Configure => AWG I/O in the Bode plot settings. Define LAN connection and the IP addres of your PC as the AWG IP. After starting the program you can press Test Connection button to test the communication between the oscilloscope and the PC.

Running The Program

To run this program you must have Python 3.11+ installed. Python 2.7 is not supported anymore.

The source code is located in the sds1004x_bode directory of this repository.

Python sockets requires elevated privileges in Linux, therefore the program has to be run with su or sudo command.

The program must be run in a command line terminal. The file to be run is bode.py. In order to run it, change the current path to the directory where you downloaded the source code. Then write the following command:

sudo python bode.py <awg_name> [<port>] [<baud_rate>] [-udp] [-h]

where

• <awg_name> is the name of the AWG connected to your PC: jds6600, bk4075, fy6600, ad9910, dg800, utg1000x or dummy. Note that dg800 might also work for other SCPI 1992.0 standard compatible AWGs.

• <port> is the port to which your AWG is connected. The type depends on you AWG, see the explanations above. For serial port AWGs, it will be something like /dev/ttyUSB0 or /dev/ttyACM0. If you use the dummy generator, you don't have to specify the port. If you use the dg800 or utg1000x, you must specify a Visa compatible connection string, like TCPIP::192.168.001.204::INSTR or USB0::9893::6453::DG1234567890A::0::INSTR

• <baud_rate> The serial baud rate as defined in the AWG settings. Currently only bk4075 supports it. If you don't provide this parameter, bk4075 will use the default baud rate of 19200 bps. Two other AWGs don't require it: jds6600, fy6600, and ad9910 run always at 115200 bps. The dummy generator doesn't use a serial port.

The dummy generator was added for running this program without connecting a signal generator. The program will emulate a Siglent AWG and the oscilloscope will generate a Bode plot but no commands will be sent to the AWG.

Use -udp if your scope is a SDS800X-HD, or another new Siglent scope.

Use -h for help text.

If the program starts successfully, you'll see the following output:

Initializing AWG...
AWG: jds6600
Port: /dev/ttyUSB0
Starting AWG server...
Listening on 0.0.0.0
RPCBIND on TCP port 111
VXI-11 on TCP port 9009
Creating sockets...

Waiting for connection request...

After starting the program, follow the usual procedure of creating Bode plot. After starting the plotting, the program output will be similar to the following:

Incoming connection from 192.168.14.27:55916.
VXI-11 CREATE_LINK, SCPI command: inst0
VXI-11 DEVICE_WRITE, SCPI command: IDN-SGLT-PRI?
VXI-11 DEVICE_READ, SCPI command: None
VXI-11 DESTROY_LINK, SCPI command: None
VXI-11 moving to TCP port 9010

Waiting for connection request...
Incoming connection from 192.168.14.27:48446.
VXI-11 CREATE_LINK, SCPI command: inst0
VXI-11 DEVICE_WRITE, SCPI command: C1:OUTP LOAD,50;BSWV WVTP,SINE,PHSE,0,FRQ,15000,AMP,2,OFST,0;OUTP ON
VXI-11 DESTROY_LINK, SCPI command: None
VXI-11 moving to TCP port 9009

Waiting for connection request...
Incoming connection from 192.168.14.27:50264.
VXI-11 CREATE_LINK, SCPI command: inst0
VXI-11 DEVICE_WRITE, SCPI command: C1:BSWV?
VXI-11 DEVICE_READ, SCPI command: None
VXI-11 DESTROY_LINK, SCPI command: None
VXI-11 moving to TCP port 9010

Waiting for connection request...
Incoming connection from 192.168.14.27:55976.
VXI-11 CREATE_LINK, SCPI command: inst0
VXI-11 DEVICE_WRITE, SCPI command: C1:BSWV FRQ,10
VXI-11 DESTROY_LINK, SCPI command: None
VXI-11 moving to TCP port 9009

Waiting for connection request...
Incoming connection from 192.168.14.27:48088.
VXI-11 CREATE_LINK, SCPI command: inst0
VXI-11 DEVICE_WRITE, SCPI command: C1:BSWV FRQ,10
VXI-11 DESTROY_LINK, SCPI command: None
VXI-11 moving to TCP port 9010

Changelog

2024-06-27

• Added support for Uni-Trend UTG1000x

2024-05-01

• The program supports the SDS800X-HD series (that uses UDP instead of TCP for the port mapping, and has trouble with re-using the VXI port)
• Added support for the Rigol DG800/DG900 series AWGs over Ethernet. USB was not tested, but should work. You might even use this implementation to connect to other Ethernet or USB connected SCPI 1992.0 standard compatible devices.

2023-11-13

• The program supports the AD9910 Arduino Shield sold by GRA & ACFH.

2019-01-30

• The program supports Feeltech FY6600 AWG.

2018-07-18

• The first version of the program was uploaded to GitHub.

Follow-up Projects

• espBode by Jakub Stępniewicz SQ6SFO - an interface between a Siglent SDS1004X-E oscilloscope and FY6800 AWG implemented on ESP-01 module.

Contributing

I'd like to add here more AWGs but it's impossible to have them all at the home lab. If you'd like to write a driver for an AWG which isn't listed here, please contact me.

Authors

• Dmitry Melnichansky @4x1md - Project idea and implementation.

• Nick Bryant (Dundarave on EEVblog Forum) - Driver for Feeltech FY6600 AWG.

• Don F Becker - Driver for AD9910 Arduino Shield.

• hb020 - Allow use with the newer SDS800x HD (12 bit) scopes, Driver for Rigol DG800/DG900 series.

• alfredfo - driver for Uni-Trend UTG1000x.

Links

1. Siglent SDS1104X-E and SDS1204X-E: Bode plot with non-Siglent AWG on EEVblog Forum.
2. Running the script with SDS1204X-E and JDS6600 AWG on YouTube (best viewed in 1080p quality).

Questions? Suggestions?

You are more than welcome to contact me with any questions, suggestions or propositions regarding this project. You can:

1. Visit my QRZ.COM page
2. Visit my Facebook profile
3. 📧 Write me an email to iosaaris =at= gmail dot com

How to Support or Say Thanks

If you like this project, or found here some useful information and want to say thanks, or encourage me to do more, you can buy me a coffee!

You can aslo make a donation with PayPal:

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73 de 4X1MD