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SmartSDR v3.7.4 and the SmartSDR v3.7.4 Release Notes | SmartSDR v2.12.1 and the SmartSDR v2.12.1 Release Notes
SmartSDR v1.12.1 and the SmartSDR v1.12.1 Release Notes
Power Genius XL Utility v3.8.8 and the Power Genius XL Release Notes v3.8.8
Tuner Genius XL Utility v1.2.11 and the Tuner Genius XL Release Notes v1.2.11
Antenna Genius Utility v4.1.8
SmartSDR v3.7.4 and the SmartSDR v3.7.4 Release Notes | SmartSDR v2.12.1 and the SmartSDR v2.12.1 Release Notes
SmartSDR v1.12.1 and the SmartSDR v1.12.1 Release Notes
Power Genius XL Utility v3.8.8 and the Power Genius XL Release Notes v3.8.8
Tuner Genius XL Utility v1.2.11 and the Tuner Genius XL Release Notes v1.2.11
Antenna Genius Utility v4.1.8
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IMD Testing Flex 6400
Ed Johnson
Member ✭✭
Is it possible to do IMD two tone test using an audio file and DAX? I am looking to do this with a 2m transverter and a spectrum analyzer at several RF power levels
1
Answers
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Yes, I have used Audacity (a free Windows application) to generate a two-tone signal and send it to SmartSDR via DAX. Works well.
73,
Doug K4DSP
0 -
I use my Rohde&Schwarz HF signal generator and my spectrum analyzer using the methods mentioned here: www.ab4oj.com/sdr/flex/6700notes.pdf
The test results for my Flex 6500 are very similar.
Testing a VLF converter for SAQ Alexanderson (example)
0 -
Alex, I believe you are talking about two-tone IMD3 dynamic range testing of the receiver. I believe Ed is referring to TX IMD testing which requires an audio signal generator, not an RF signal generator.
If I am wrong, please let me know.
73,
Doug K4DSP
P.S. The R&S test equipment is very nice. I did some work for R&S in Munich back in the 1990s. Bavaria is a lovely place.
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I lived by Ostbahnhof in Munich for eight years starting in the late 90s. I always wondered what it was like to work at R&S, which is walking distance from there.
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Doug,
Yes, I am talking about two tone Tx test for transmit IMD.
Thanks
Ed W2PH1 -
Thank you for clarifying, that it's a transmit IMD test. Good idea to use Audacity to try this. I've always used NF tone generators and will try an audio file now :-)
73, Alex - DH2ID0
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