Search found 129 matches

by DaveB
Wed Feb 25, 2015 10:19 pm
Forum: SDRplay related
Topic: Using SDR# to drive the SDRplay RSP
Replies: 53
Views: 21243

Re: Using SDR# to drive the SDRplay RSP

I mean you reach the corner of the "filter" and you may tune a signal outside the "flat" bandpass. I don't know if this is a problem of SDR#, of SDR# plugin or what else... It is a function of the software and it is very irritating :x . Try using HDSDR instead. It has a LO (Loca...
by DaveB
Tue Feb 24, 2015 5:28 pm
Forum: SDRplay related
Topic: Using SDR# to drive the SDRplay RSP
Replies: 53
Views: 21243

Re: Using SDR# to drive the SDRplay RSP

if you try to set the overall gain reduction to 60 dB, it can only do this by attempting to set the IF gain reduction to 60 dB What about the Mixer gain reduction of 19dB that will kick in? After the LNA has turned off (-24dB) when the IF GR reaches a certain level the mixer gain will drop by 19dB ...
by DaveB
Sat Feb 21, 2015 11:09 am
Forum: General
Topic: Slow Scan TV Reception
Replies: 1
Views: 2070

Slow Scan TV Reception

Apologies for not replying to the earlier request - I hadn't spotted it. The original was a link to my post in the Skywaves group and I note the screenshot was corrupted - so first here is a replacement showing an SSTV transmission in progress. Too large to attach so link to Box. https://app.box.com...
by DaveB
Mon Feb 09, 2015 5:37 pm
Forum: General
Topic: DAB software supporting SDRPlay
Replies: 3
Views: 3892

Re: DAB software supporting SDRPlay

Not quite the right solution - but it means I can monitor/listen to DAB whilst checking for DX on the FM Band - a program called "DAB Player" works well with a Realtek 2832 dongle. It only appears to add 2% to my CPU load (i5 4460).

Rgds

David
by DaveB
Wed Feb 04, 2015 9:51 am
Forum: General
Topic: 21 MHZ DX pile up - screen shot and WAV file
Replies: 4
Views: 3026

Re: 21 MHZ DX pile up - screen shot and WAV file

Hi Quimquim, Thanks for suggestion - but the big rectangular block I'm talking about is to the HF side of the 15m amateur band. At 21.58-21.71 and I've also found the same block at double the frequency around 43 MHz and twice as wide. Zoom in a lot and you can see it is one transmission. BTW did you...
by DaveB
Tue Feb 03, 2015 3:10 pm
Forum: General
Topic: 21 MHZ DX pile up - screen shot and WAV file
Replies: 4
Views: 3026

21 MHZ DX pile up - screen shot and WAV file

They are going absolutely nutty on 21 Hz! and I have no idea who they are working - I suspect the DX station is working split frequency - but it makes a good screen shot! https://app.box.com/s/abmzflx8dd555m3pa4crw0yj7b1dp2iz Also an 11 second long .wav file of the pile up. It is rather large as it ...
by DaveB
Mon Feb 02, 2015 11:06 pm
Forum: General
Topic: Removing Zero IF Image signals in FM Broadcast Band
Replies: 4
Views: 4381

Removing Zero IF Image signals in FM Broadcast Band

When first using SDRPlay I noticed that an image of the strongest station - Heart 102.8 - was present. It turns out that this is an inherent feature of SDR receivers that use Zero IF Quadrature Switching Detector - of which SDRPlay is one. In order to get the best image (i.e. unwanted sideband) reje...
by DaveB
Sun Feb 01, 2015 6:56 pm
Forum: SDR Antennas
Topic: Antenna input socket
Replies: 42
Views: 31087

Re: Antenna input socket

Regarding the comment about it being in a plastic box. I would have preferred a diecast box as the SDRPlay radiates a lot of low level spurii. I tested out how much improvement a metal box would give by wrapping it in two layers of kitchen foil, scrunching it up around the aerial connector and ensur...
by DaveB
Sun Feb 01, 2015 6:11 pm
Forum: General
Topic: DAB software supporting SDRPlay
Replies: 3
Views: 3892

Re: DAB software supporting SDRPlay

Thanks for the link - have tried it and it works. However it seems to rely on manually setting the gain - and only a narrow window of gain settings give a good result. So something different needed for each MUX I can pick up (7 altogether from 4 locations). But I shall persevere as it has potential ...

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