Search found 223 matches

by g1hbe
Mon Nov 13, 2017 10:20 am
Forum: General
Topic: Question about HDSDR and rsp1 dbfs numbers
Replies: 2
Views: 166

Re: Question about HDSDR and rsp1 dbfs numbers

I haven't used HDSDR for ages so I can't help with those numbers, but the CLIP warning means you've got too much gain in the system and the ADC is hitting the stops.
by g1hbe
Thu Nov 09, 2017 8:35 pm
Forum: SDRplay related
Topic: RSP2Pro BC band filter?
Replies: 2
Views: 143

Re: RSP2Pro BC band filter?

The RSP's are very sensitive and will easily match any other RX I have here. If you are using SDRUno software, make sure the AM/FM reject filter is OFF if you wish to listen to MW BC stations.
Just curious, what antenna and which antenna port are you using, as it may have a bearing on your problem?
by g1hbe
Sun Nov 05, 2017 11:16 pm
Forum: SDRplay related
Topic: RSP2 issue
Replies: 3
Views: 284

Re: RSP2 issue

As far as I know, the A & B inputs are identical, the only difference being that B has a bias-T facility. I can't see that causing such a difference though. Have you tried using the Hi-z input for HF as recommended by the makers? I think it uses one less conversion so maybe it avoids the spurii....
by g1hbe
Sat Nov 04, 2017 11:07 am
Forum: General
Topic: Tone hurts ears?
Replies: 2
Views: 175

Re: Tone hurts ears?

Is it a low-frequency tone (like a hum) or a high frequency whistle? If it's a low hum it may be the CTCSS access tone you are hearing. In SDRUno it goes like this: On the upper frame of the RX control panel you will see a button marked EXW. Click it and a new small window (called EX control I think...
by g1hbe
Fri Oct 27, 2017 8:27 am
Forum: General
Topic: FSK
Replies: 3
Views: 250

Re: FSK

The tradition for commercial traffic (ie not amateur) is USB. Tune until the text appears and that will be the correct frequency.
by g1hbe
Tue Oct 24, 2017 11:31 am
Forum: General
Topic: Another odd signal (or signal-like phenomenon)
Replies: 4
Views: 310

Re: Another odd signal (or signal-like phenomenon)

The magic of SDR that you can see these things as well as hear them. Indeed. On a conventional receiver, you'd just hear a 'blip' as the signal passed through the passband, but on a waterfall you can see what it really happening. You can also see all the image responses and other spurii of your rec...
by g1hbe
Sat Oct 21, 2017 11:47 am
Forum: General
Topic: Odd signals and other unusual patterns
Replies: 9
Views: 437

Re: Odd signals and other unusual patterns

That pattern of spikes looks like the type of buzz I get from a nearby plasma TV. If you listen in AM you may hear a sharp buzzing sound.
by g1hbe
Wed Oct 18, 2017 3:01 pm
Forum: General
Topic: SAM mode
Replies: 3
Views: 314

Re: SAM mode

It works reliably here. One mistake people make is to have the tuned frequency and the LO frequency the same, which corrupts the signal. The other possibility is that the signal is fading in and out and the sync is lost.
by g1hbe
Tue Oct 17, 2017 8:46 am
Forum: SDRuno
Topic: SDRuno RSP2pro Frequency entry problem
Replies: 2
Views: 181

Re: SDRuno RSP2pro Frequency entry problem

Surely there can be only one decimal point? For instance 150.123456 MHz doesn't need any more points , it is correct as it stands. Sorry if I am misunderstanding.
by g1hbe
Mon Oct 16, 2017 8:28 am
Forum: SDRuno
Topic: Excessive CPU usage
Replies: 3
Views: 397

Re: Excessive CPU usage

A couple of years ago my Win7 laptop started doing this. It would start up fine but within a few moments everything was running slowly and it was also running hot. To cut a very long story short, it turned out to be a well-known W7 bug which caused the PC to constantly search for updates. The cure w...

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