Search found 31 matches

by hfsdpk11
Sun Jun 04, 2017 12:23 pm
Forum: New Users' experiences
Topic: Operation Difficulties
Replies: 5
Views: 3411

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: 2578

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: 3502

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: 3638

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: 3638

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: 2578

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 ...
by hfsdpk11
Wed May 24, 2017 2:46 pm
Forum: SDRuno
Topic: Channel Skew Adjustment Procedure
Replies: 4
Views: 2578

Channel Skew Adjustment Procedure

Would someone please give an explanation how best to adjust the controls in the MAIN "Channel Skew Adjustment" panel? I take it these are controls to adjust the I/Q channels but haven't been able to find an explanation on how to adjust them or what parameter(s) to monitor when making an ad...
by hfsdpk11
Sun May 14, 2017 11:33 am
Forum: SDRuno
Topic: Amateur VHF/UHF Problem
Replies: 2
Views: 1828

Re: Amateur VHF/UHF Problem

Check that LO LOCK in the MAIN window is disabled (not highlighted). If LO LOCK is enabled, that will restrict VFO tuning to within the IF BW and centred on the LO frequency. With LO LOCK disabled, you should be able to enter desired frequency per the instructions in the user manual. There's nothing...
by hfsdpk11
Sun May 07, 2017 12:24 pm
Forum: SDRuno
Topic: Suggestions (or maybe some of these features already exist)
Replies: 4
Views: 2210

Re: Suggestions (or maybe some of these features already exist)

Regarding CW ZAP, I haven't quite figured it out either but it does seem to snap the VFO to the strongest CW signal in the IFBW rather than the FILTER BW. My setup is plagued by several spurs which I can avoid by judicious sampling and filtering but I find that if there's a signal stronger than the ...
by hfsdpk11
Sun May 07, 2017 11:57 am
Forum: SDRplay related
Topic: Recording Audio
Replies: 4
Views: 3468

Re: Recording Audio

Hopefully, I'm understanding your need as wanting to record the audio of several RF frequencies within the RSP IF bandwidth to a single audio wav, mp3 or similar file. One way to do that is to firstly launch your favourite PC audio recorder (I use Audacity because it's supported by both Windows and ...

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