Search found 973 matches

by sdrplay
Mon Jul 08, 2019 9:04 am
Forum: Code Corner
Topic: newbie question
Replies: 1
Views: 528

Re: newbie question

Not all of the code building commands are pre-installed. In a terminal window, run...

sudo apt install cmake

this will install the cmake command. There may be others that you run into.

Best regards,

SDRplay Support
by sdrplay
Sat Jul 06, 2019 8:04 am
Forum: General
Topic: Rasbian Buster with GNU Radio Workflow Failing on "make"
Replies: 2
Views: 514

Re: Rasbian Buster with GNU Radio Workflow Failing on "make"

Trying to build the API means that the compiler can't find it. Check file location and whether it's the right API for the processor type.

Best regards,

SDRplay Support
by sdrplay
Fri Jul 05, 2019 8:22 pm
Forum: SDRuno
Topic: ADS-B questions (beginner)
Replies: 4
Views: 594

Re: ADS-B questions (beginner)

The standard dump1090 demodulator is 2 MHz. The signal is actually only 50 kHz wide but it can be anywhere +/- 1 MHz of 1090 MHz - we added an 8 MHz demodulator as an experiment to see whether it would acquire more ADS-B data - I've not done a lot of testing, but it should be better than the 2 MHz d...
by sdrplay
Fri Jul 05, 2019 2:04 pm
Forum: SDRuno
Topic: ADS-B questions (beginner)
Replies: 4
Views: 594

Re: ADS-B questions (beginner)

I would recommend looking through our user guide... https://www.sdrplay.com/docs/SDRplay_ADS-B_User_Guide.pdf This explains how you can get the aircraft information into Virtual Radar Server software which you can then view on a map. The difference between interactive and non-interactive mode is tha...
by sdrplay
Thu Jul 04, 2019 1:44 pm
Forum: SDRplay related
Topic: SDRPlay Crashing During Memory Scan
Replies: 1
Views: 405

Re: SDRPlay Crashing During Memory Scan

That is a known issue and has been fixed for the next release 1.32

If you avoid having non-numerical characters in the frequency field this won't be a problem.

Best regards,

SDRplay Support
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: 578

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: 578

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: 1989

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: 1989

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: 5
Views: 2065

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...