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by Tech_Support
Mon Jul 16, 2018 4:28 pm
Forum: SDRplay related
Topic: RSPduo and other software
Replies: 8
Views: 763

Re: RSPduo and other software

Hello Jukka, The launch of the RSPduo was timed to coincide with a major Ham radio event at Dayton, Ohio. We made it clear at the launch what software was available and what our development plans were. People therefore had a choice whether they buy the product or wait. Unfortunately, no mater what s...
by Tech_Support
Thu Jul 12, 2018 5:36 pm
Forum: General
Topic: Noise level reading
Replies: 4
Views: 165

Re: Noise level reading

Hello Patrick, The noise floor on the spectrum display is the noise power per bin of the FFT, or put another way, it is the total noise power in the resolution bandwidth of the FFT. I cannot see the RBW value in your picture, but it will be shown in the lower right hand corner of your SP1 display. T...
by Tech_Support
Mon Jul 09, 2018 8:55 pm
Forum: SDRplay related
Topic: SDRplay_SDRuno Ver. 1.23.1 HAS BIG PROBLEMS PERHAPS...!!
Replies: 2
Views: 250

Re: SDRplay_SDRuno Ver. 1.23.1 HAS BIG PROBLEMS PERHAPS...!!

Hello glovisol, The only change between 1.23 and 1.23.1 is a change to the API to correct a bug that was affecting the RSPduo tuner 2 at a 10 MHz sampling rate. Nothing else has changed. Can you confirm what hardware you are using and post screen shots that show the effects you are seeing? Ideally o...
by Tech_Support
Fri Jul 06, 2018 4:05 pm
Forum: SDRuno
Topic: SDRuno, dBm levels incorrect in Main SP window during playback
Replies: 3
Views: 162

Re: SDRuno, dBm levels incorrect in Main SP window during playback

Hello Francois, All SDR programs receive an I/Q stream from the ADCs and so all magnitude information is referred initially to the ADC input. To convert this to an antenna referred power level, the software uses a combination of the RSP gain setting values and calibration tables to calculate what th...
by Tech_Support
Thu Jul 05, 2018 9:34 pm
Forum: General
Topic: RSP RECEIVER LOW NOISE HF OPERATION WITH LONG WIRE ANTENNAS
Replies: 12
Views: 692

Re: RSP RECEIVER LOW NOISE HF OPERATION WITH LONG WIRE ANTENNAS

glovisol, I would very much like to commend you on an exceptionally high quality and informative thread. This level of technical information is both rare and invaluable to the whole community. Similarly the contribution from both yourself and Phil (vk7jj) regarding noise measurements and antenna mod...
by Tech_Support
Tue Jun 26, 2018 7:27 am
Forum: General
Topic: Testing RSPduo receiver sensitivity with noise generator
Replies: 44
Views: 2236

Re: Testing RSPduo receiver sensitivity with noise generator

Hello Folks, Decimation will have no discernible affect on sensitivity or noise figure. Decimation increases the ADC resolution and decreases quantisation noise. This will only be noticeable at very low gain settings where the ADC quantisation noise starts to be come significant in the overall syste...
by Tech_Support
Sun Jun 24, 2018 5:25 am
Forum: New Users' experiences
Topic: RSP1a only noise
Replies: 5
Views: 495

Re: RSP1a only noise

Hello John,
You are tuned to 107.2 kHz, not 107.2 MHz.

Sincerely

Tech_Support
by Tech_Support
Sun Jun 17, 2018 7:03 am
Forum: Spectrum Analysis
Topic: Feedback for version 0.9a here
Replies: 117
Views: 6800

Re: Feedback for version 0.9a here

maccountrypilot wrote:well uno will not load when the spectrum analyzer tries to run .... it says there is no rsp present


You can only run one at a time as each application will reserve the RSP.

Sincerely

Tech_Support
by Tech_Support
Fri Jun 15, 2018 8:07 pm
Forum: SDRplay related
Topic: new RSPduo rattle
Replies: 2
Views: 258

Re: new RSPduo rattle

Hello Tim,
This will just be the screws in the green connector. Either tighten them up or un-plug the connector and the rattle will go away.

Sincerely

Tech_Support
by Tech_Support
Thu Jun 14, 2018 1:12 pm
Forum: Spectrum Analysis
Topic: Feedback for version 0.9a here
Replies: 117
Views: 6800

Re: Feedback for version 0.9a here

I suspect what you are seeing here is ADC overload. Moving the RF gain from state 0 to state 8 reduces the RF gain. In my tests, I can see a warning for an overloaded ADC.

Steve can perhaps comment better on this.

Sincerely

Tech_Support

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