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by sdrplay
Tue Jul 02, 2019 6:42 pm
Forum: Code Corner
Topic: trying to reduce dc offset with low if modes, api differences
Replies: 4
Views: 287

Re: trying to reduce dc offset with low if modes, api differences

In the IQ stream, the centre will be at the beginning of the data, so I would check that you have the right number of points, etc. - I would also try other frequencies to see if you get the same result.

Best regards,

SDRplay Support
by sdrplay
Mon Jul 01, 2019 9:51 pm
Forum: Code Corner
Topic: trying to reduce dc offset with low if modes, api differences
Replies: 4
Views: 287

Re: trying to reduce dc offset with low if modes, api differences

There is always a DC spike, the IF mode determines where the spike appears. In Zero IF mode, the DC spike is at the LO frequency (0 Hz offset). Software is used to remove the spike which can also remove any signal at the LO frequency (which is why you need to apply an offset between the LO and VFO f...
by sdrplay
Mon Jul 01, 2019 1:18 pm
Forum: SDRplay related
Topic: RSPA1 : Sampling rate vs Bandwidth
Replies: 5
Views: 1533

Re: RSPA1 : Sampling rate vs Bandwidth

If you use the rule to make sure the IFBW is equal to or lower the final sample rate (after decimation), this will avoid any aliasing issues.

SDRplay Support
by sdrplay
Mon Jul 01, 2019 12:32 pm
Forum: SDRplay related
Topic: RSPA1 : Sampling rate vs Bandwidth
Replies: 5
Views: 1533

Re: RSPA1 : Sampling rate vs Bandwidth

The IF BW values are fixed to those that I listed for both Low IF and Zero IF mode. From a processing load perspective (as well as visual) it would make more sense to specify 2 MHz sample rate, decimation of 4 and a IFBW of 300 kHz this will give you a final sample rate of 500 kHz and only 100 kHz e...
by sdrplay
Sun Jun 30, 2019 5:22 pm
Forum: SDRplay related
Topic: Frequency shift for LNB/Es'Hail
Replies: 4
Views: 1357

Re: Frequency shift for LNB/Es'Hail

Maybe my misunderstanding, but there is no fault with the RSP product or the drivers. As long as the specified RF frequency to the RSP API is within the 1 kHz to 2 GHz range that we say on our datasheets, then the API and the RSP will function correctly. SDRuno is a free download, it's not part of o...
by sdrplay
Fri Jun 28, 2019 3:33 pm
Forum: General
Topic: Raspberry Pi4B
Replies: 6
Views: 1052

Re: Raspberry Pi4B

I have tried many SBCs and have them all working with RSPs... RPi3 - RPi4 Asus Tinkerboard Beaglebone Black Orange Pi Odroid C2 Odroid XU4 Pine64 etc. I got the 4GB version of the RPi4B and now have just put it in a case with a fan. CPU Temp is constant at 46deg (it was running closer to 80deg last ...
by sdrplay
Thu Jun 27, 2019 11:23 pm
Forum: General
Topic: Raspberry Pi4B
Replies: 6
Views: 1052

Re: Raspberry Pi4B

Yes had CubicSDR running this evening - looks like I can run up the sample rate higher than with RPi3B+, but only a quick look. Waiting for fan to arrive before being able to run proper comparative tests.

Looking good though. We'll put an image together when time permits.

Best regards,

Andy
by sdrplay
Wed Jun 26, 2019 11:00 am
Forum: SDRuno
Topic: Diversity Demo in Xenia
Replies: 2
Views: 563

Re: Diversity Demo in Xenia

We have been working hard on getting 1.32 released and after Dayton there were some changes that needed to be made to make the system more robust. The software has been with beta testers and we're working on the last few issues and hope to get it released asap. Yes, I was convinced with our early te...
by sdrplay
Wed Jun 19, 2019 8:00 am
Forum: General
Topic: SDR# And RSP-2 ?
Replies: 4
Views: 1807

Re: SDR# And RSP-2 ?

The last version of SDR# to support ExtIO plugins was 1361

SDRplay Support
by sdrplay
Tue Jun 18, 2019 3:28 pm
Forum: SDRplay related
Topic: SDRplay RSP2 appears to be useless on Ubuntu
Replies: 2
Views: 501

Re: SDRplay RSP2 appears to be useless on Ubuntu

You don't need to register to get the API if you don't want to - go to http://www.sdrplay.com/downloads and get the API directly. Before executing the .run file you will need to make it executable first by using chmod 755 filename then you can run the installer as you can see in this video... https:...

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