Search found 25 matches

by hfsdpk11
Sun Jun 11, 2017 12:38 pm
Forum: SDRuno
Topic: IF GAIN
Replies: 4
Views: 938

Re: IF GAIN

A significant disadvantage in disabling IF AGC is exposing vulnerability to overdriving the ADC which leads to nasty things like images, intermodulation products and possibly de-sensing signals of interest. I think the overdrive warning flag doesn't work if you disable IF AGC, so you won't know the ...
by hfsdpk11
Sun Jun 11, 2017 12:30 pm
Forum: SDRuno
Topic: SDRUno Recording - Bandwidth and Timer Function
Replies: 1
Views: 400

Re: SDRUno Recording - Bandwidth and Timer Function

The recording spectrum is determined by the sample rate and decimation you've selected in the Main window, it's the same as "Final SR". The recorder seems to simply write the post-decimation data stream as a WAV file - there are no supplemental sampling controls in the Recorder function. Y...
by hfsdpk11
Sun Jun 11, 2017 12:21 pm
Forum: SDRplay related
Topic: Record fails with "Unable to create a new output WAV file"
Replies: 1
Views: 512

Re: Record fails with "Unable to create a new output WAV file"

Check your setup. First thing I'd look for is whether the folder path you've specified actually still exists. Does your target drive have enough free space. Creating the WAV file may require Windows to reserve disc space & you don't have enough the process will fail. This happens if your target ...
by hfsdpk11
Sat Jun 10, 2017 1:23 am
Forum: SDRuno
Topic: Erratic RF Gain control
Replies: 6
Views: 1146

Re: Erratic RF Gain control

Actually, I've developed an SDRUno user guide, albeit incomplete, that's available from my Dropbox: https://www.dropbox.com/sh/nz5t2x9ge8td1o2/AACv0z1hKxSJJo6v0OWKg3-pa?dl=0 I've posted this link in the "new users" forum as well. It's in LibreOffice Calc .ods format. As mentioned, it is in...
by hfsdpk11
Sun Jun 04, 2017 12:23 pm
Forum: New Users' experiences
Topic: Operation Difficulties
Replies: 5
Views: 1195

Re: Operation Difficulties

I've taken some time going through each and every indicator and control on SDRUno V1.13 and created a spreadsheet in an attempt to explain all of them. There are some points that are still in question so this is a work in progress. The spreadsheet is in OpenText .ods format and you can get it from m...
by hfsdpk11
Tue May 30, 2017 2:01 pm
Forum: SDRuno
Topic: Channel Skew Adjustment Procedure
Replies: 4
Views: 747

Re: Channel Skew Adjustment Procedure

g1hbe: I did some adjustments after finding a VHF signal 50 dB. above the noise and managed to null out the image with some amplitude and phase adjustment, so thanks again for your guidance. The adjustment wasn't much, only a tick on amplitude and about 1.3 deg in phase. There are four slider select...
by hfsdpk11
Sun May 28, 2017 8:14 pm
Forum: SDRuno
Topic: Erratic RF Gain control
Replies: 6
Views: 1146

Erratic RF Gain control

Is it just me, or do others find the RF Gain (Gain Reduction) control on the Main window to be inconsistent? With IF AGC enabled in Main-SETT-INPUT, moving the RF gain slider results in non-linear, and sometimes reversing, changes in Gain. E.g. at mid-range, it might report 40 dB. Gain, then 35 dB. ...
by hfsdpk11
Sun May 28, 2017 5:21 pm
Forum: SDRuno
Topic: Ctrl Panel & Main SP different freq.
Replies: 7
Views: 970

Re: Ctrl Panel & Main SP different freq.

I think you've got it. In essence, you can tune the VFO of any VRX across: LO +/- SR/2 but not outside of that. Since the RSP has only one LO, you're limited to the bandwidth around it and no more. Look on the VRXs as taking a chunk out of the passband provided by the LO and sampling of the ADC and ...
by hfsdpk11
Sun May 28, 2017 1:35 pm
Forum: SDRuno
Topic: Ctrl Panel & Main SP different freq.
Replies: 7
Views: 970

Re: Ctrl Panel & Main SP different freq.

You can tune a VRX only within the sampling rate bandwidth centred on the LO of VRX0. In your case, VRX-0 sets the LO to 446.753637 MHz. and you're using a sampling rate of 10 MHz. That means the VFO tuning range of <ALL> VRXs is limited to 446.753637 +/- 5 MHz, or roughly 441.75 to 451.75 MHz. You ...
by hfsdpk11
Sun May 28, 2017 1:09 pm
Forum: SDRuno
Topic: Channel Skew Adjustment Procedure
Replies: 4
Views: 747

Re: Channel Skew Adjustment Procedure

Thanks. I'm not seeing any images although the noise floor is only ~35 dB. below the strongest signals I can find so I guess the settings are ok where they are. Curious that in my case (RSP2 pro) the residual LO level is much better with automatic I/Q correction disabled and setting the controls to ...

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