Search found 2263 matches

by rtlsdrblog
Sat Sep 14, 2019 4:13 am
Forum: KerberosSDR
Topic: Feature requests / development ideas
Replies: 15
Views: 1019

Re: Feature requests / development ideas

Kerberos designers can correct me if I am wrong but if I got it right this is not like a power vs frequency calibration that you put in a table and update once in a while when some external condition (temperature...) changes. The 4 receivers have a common clock so they are coherent at a certain poi...
by rtlsdrblog
Sat Sep 14, 2019 4:10 am
Forum: KerberosSDR
Topic: run it on rpi4
Replies: 7
Views: 641

Re: run it on rpi4

Hi everyone, I've done all these steps and am able to run the app on my pi4, but I can't get it to do anything. I Click Start Processing and I get no updates. I get no errors when uncommenting the logging in the run.sh either. rtl_test works on all the devices (at least I think, the output is below...
by rtlsdrblog
Sat Sep 14, 2019 4:08 am
Forum: KerberosSDR
Topic: two micro-USB ports, no USB-C...?
Replies: 5
Views: 231

Re: two micro-USB ports, no USB-C...?

Yeah we've added an EEPROM programming step to the QC procedure now.
by rtlsdrblog
Fri Sep 13, 2019 5:36 am
Forum: RTL-SDR Discussion
Topic: Kali Linux 2019 and Bias-T
Replies: 6
Views: 255

Re: Kali Linux 2019 and Bias-T

What version of librtlsdr does Kali run? I'd try uninstalling it, and installing it from source. Probably the version you have in Kali is setting all GPIO to zero initially for some reason.
by rtlsdrblog
Fri Sep 13, 2019 5:34 am
Forum: KerberosSDR
Topic: Chaining 2 KerberosSDR's
Replies: 11
Views: 1639

Re: Chaining 2 KerberosSDR's

how do we enable the noise source via gpio? Can i do it via usb? I am using gnuradio because I am doing beam steering instead of doa. I can use my own noise source but much better to use the internal source. To enable the noise source just call rtlsdr_set_gpio(rtl_rec->dev, 1, 0) in the code. See l...
by rtlsdrblog
Fri Sep 13, 2019 4:55 am
Forum: KerberosSDR
Topic: Single U.FL to SMA adapter faulty
Replies: 1
Views: 84

Re: Single U.FL to SMA adapter faulty

Sorry about that. Signal levels are one thing that is QC checked so it should have been caught.

Contact us at [email protected] and [email protected] for a replacement cable.
by rtlsdrblog
Wed Sep 11, 2019 11:56 am
Forum: RTL-SDR Discussion
Topic: Making standalone app for PlutoSDR from C code on Windows
Replies: 1
Views: 118

Re: Making standalone app for PlutoSDR from C code on Windows

If you're wanting to run code on the PlutoSDRs micro, you're going to have to learn Linux as Windows cannot run on the PlutoSDR.
by rtlsdrblog
Wed Sep 11, 2019 6:55 am
Forum: Troubleshooting Help
Topic: Measuring FM Filter Performance in Downtown Houston
Replies: 1
Views: 121

Re: Measuring FM Filter Performance in Downtown Houston

I don't know why LNA's are so popular for 137 MHz satellites. At this frequency LNA's have minimal benefits unless you have a lot of cable loss. They're actually more likely to cause overloading issues. Try without the LNA, but with the filter in place. SNR is the best metric. I can only guess that ...
by rtlsdrblog
Wed Sep 11, 2019 6:53 am
Forum: Troubleshooting Help
Topic: mouse crashes when sdrsharp is running
Replies: 1
Views: 102

Re: mouse crashes when sdrsharp is running

Might be power related. WHen SDR# starts, the RTL-SDRs will turn on and draw more power. If you're USB port can't handle the power for 2x RTL-SDR and the mouse, then the mouse might drop.

Try other USB ports.
by rtlsdrblog
Wed Sep 11, 2019 6:51 am
Forum: KerberosSDR
Topic: LNA
Replies: 3
Views: 214

Re: LNA

You need to be careful of any phase corruption the LNA introduces. Unless the frequency is high UHF or L-band, I see no value to even trying an LNA as it's probably just going to make things worse since we don't need long cable runs.