Search found 285 matches

by g1hbe
Tue Nov 21, 2017 8:58 am
Forum: SDRplay related
Topic: Ant switching bug still present?
Replies: 5
Views: 662

Ant switching bug still present?

I see we still have the 'freezing' when initially switching from Ant A to Hi-z. To replicate it, start Uno at a VHF frequency on ANT A, then move to a low frequency (2MHz in my case) then select Hi-z. Waterfall etc will lock up. Clicking 'stop' and then 'play' corrects it.
by g1hbe
Sun Nov 19, 2017 12:00 am
Forum: SDRuno
Topic: SDRPlay2 wont work on SSB
Replies: 6
Views: 752

Re: SDRPlay2 wont work on SSB

Nicks suggestion is good. It doesn't even have to be anything exotic like WWV, a MW BC station would do. Up or down 1KHz (with suitable switching of USB or LSB) should produce a tone. If you get that, it's working.
by g1hbe
Mon Nov 13, 2017 10:20 am
Forum: General
Topic: Question about HDSDR and rsp1 dbfs numbers
Replies: 2
Views: 522

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: 575

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: 846

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: 536

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: 696

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: 988

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: 1153

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: 980

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.

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