[hpsdr] A real newbie question

[Terry Fox]

Hey Pete,
I don’t know about any common software that runs on both.  I have been messing with the Red Pitaya for a while now.  I have run it with SDR#, HDSDR, GNU Radio, and a while back on PowerSDR, but that’s no loaded on the “new” bench computer.

I’m getting ready to do some analysis of the RP, and have been finding and fixing my Rx test equipment accessories.  I just did a quick test using a good, modern signal generator.  I found that on SDR# version 1337, with the generator set to –93dBm, I get a signal about –100dBm on the RP and SDR#.  This level is consistent from about 2MHz to 30MHz.  So, the RP seems to be pretty flat across HF.

I want to do more testing at more RF levels, and particularly LF.  This is just a quick note, as everything was already running on the bench!  Also, don’t run the latest RP ecosystem with Pavel’s software, as there is a bug in the latest ecosystem vs Pavel SW.  If you run that combo, you will get multiple spurs around the main bang.

73, Terry, N4TLF


From: Pete Smith N4ZR 
Sent: Wednesday, October 26, 2016 2:24 PM
To: hpsdr at openhpsdr.org 
Subject: [hpsdr] A real newbie question

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I'm one of the RBN team, and am comparison testing the QS1R and Red Pitaya receivers with VE3NEA's CW Skimserv. I'm getting some anomalies that I can't explain with my 1960's level of electronic sophistication, so I'm looking to begin comparing the two receivers for things like sensitivity, MDS, and so on.

A very useful tool would be an SDR console capable of running with both the QS1R and the Red Pitaya (with software by Pavel Demin).  I have SDRMAXV for the QS1R and PowerSDR from your website, but have no idea whether the signal level readouts on the two programs are in any way comparable.

Does anyone know of a console that will run with both sets of hardware and provide signal levels in dBm?

Alternatively, can anyone tell me if PowerSDRmRX PS is fairly accurate with its signal strength readouts, or at least consistent from 160 to 10M?  I'm seeing about a 20 dB reduction in sensitivity of the Red Pitaya at 20M and above compared with 40 and below.


TIA


73, Pete N4ZR
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