Search found 108 matches

by F1BJB
Tue Oct 10, 2017 2:43 am
Forum: SDRuno
Topic: Excessive CPU usage
Replies: 4
Views: 696

Re: Excessive CPU usage

I had this problem with windows 7 and many audio/video related software's. It is not related to SDRuno I tried a lot of tips from various sources with no effect. It seems that the problem mysteriously vanished and I don't know if it was due to an update from Microsoft or the installation of a softwa...
by F1BJB
Wed Oct 04, 2017 3:14 pm
Forum: New Users' experiences
Topic: PC (laptop) power induces significant noise
Replies: 15
Views: 4038

Re: PC (laptop) power induces significant noise

PC monitors or their cables can also produce interference A trick is to start a recording then switch off and disconnect everything from your PC : keyboard, mouse, monitor,speakers , etc Then play back the recording. Of course for a laptop you are limited :) I also found that sometimes interference ...
by F1BJB
Wed Oct 04, 2017 1:47 pm
Forum: SDR Antennas
Topic: antenna seperation
Replies: 4
Views: 823

Re: antenna seperation

This is a complex question there is no simple answer. It depends : On the transmitting power used On the directional properties of both antennas On the polarisation of the antennas On the presence of filters in front of the receiver to reduce the signal of the transmitter If you want to use both at ...
by F1BJB
Mon Oct 02, 2017 2:33 pm
Forum: SDRplay related
Topic: Blew up antenna port A on my new RSP2. :(
Replies: 4
Views: 764

Re: Blew up antenna port A on my new RSP2. :(

On many DVBT dongles the diodes are directly connected to the RF input
So any DC on the coaxial kills them.
Bad design a small capacitor is needed.
by F1BJB
Tue Sep 26, 2017 8:59 am
Forum: SDRplay related
Topic: Choppy/Stuttering audio across platforms.
Replies: 25
Views: 8261

Re: Choppy/Stuttering audio across platforms.

Hi 10MHz span is useful to search visually a wide band for activity but ,except for DVBT and DAB, it is always better to limit the span as much as possible when actually demodulating a particular signal. I have found that 1.5Mhz has 2 side notches that can be very useful to prevent overload by local...
by F1BJB
Mon Sep 18, 2017 8:23 pm
Forum: New Users' experiences
Topic: DRM reception with SDRPlay and SDRUno
Replies: 12
Views: 2369

Re: DRM reception with SDRPlay and SDRUno

supwiddiss wrote:Could someone kindly post a few DRM freqs receivable in the USA?
I have it working with the help of a test file. But so far, no live reception.
Thanks!

Hi
As far as i know there are very few.
The best way is to look/ask here:
http://www.drmrx.org/forum/
by F1BJB
Wed Sep 13, 2017 10:13 am
Forum: SDRplay related
Topic: broadcast spurious in the LF band
Replies: 1
Views: 308

Re: broadcast spurious in the LF band

Hi As the only build in filter in that range is a 12MHz low-pass it is normal. The solution is to use an external one. As the maximum bandwidth of the RSP1 is about 10MHz incorporating narrower filters would have : Destroyed this useful feature Increased the cost a lot. Deteriorated the flatness of ...
by F1BJB
Mon Sep 11, 2017 7:00 pm
Forum: General
Topic: Seeing spectrum of UHF (HDTV) Broadcast Band
Replies: 5
Views: 1152

Re: Seeing spectrum of UHF (HDTV) Broadcast Band

There's not a lot to see with digital TV, just 'blocks' of what looks like noise. That is not true :) If the top of the noise is not flat it indicates either a badly oriented aerial with echoes or SFN or MFN interference. mystere.JPG Here you see the difference between channel 22 correctly received...
by F1BJB
Thu Aug 17, 2017 7:55 am
Forum: General
Topic: sdrsharp 1361
Replies: 7
Views: 1262

Re: sdrsharp 1361

SDRsharper is an alternative to sdrsharp that I have been using happily since it appeared. You just have to add the ExtIO*.dll It can be downloaded here: http://www.qsl.net/sdr/ see also : http://www.sdrplay.com/community/viewtopic.php?t=367 At first glance it may seem complicated but it comes with ...
by F1BJB
Mon Aug 14, 2017 9:32 pm
Forum: New Users' experiences
Topic: SDR/Uno Won't Use VSC
Replies: 10
Views: 1474

Re: SDR/Uno Won't Use VSC

This is an alternative to VAC I used successfully in the past:
http://www.vb-audio.com/Cable/index.htm

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