Search found 2271 matches

by rtlsdrblog
Sat Sep 14, 2019 4:08 am
Forum: KerberosSDR
Topic: two micro-USB ports, no USB-C...?
Replies: 5
Views: 269

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: 304

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: 13
Views: 1726

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: 105

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: 133

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: 140

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: 115

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: 242

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.
by rtlsdrblog
Wed Sep 11, 2019 6:49 am
Forum: KerberosSDR
Topic: two micro-USB ports, no USB-C...?
Replies: 5
Views: 269

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

Yep we had to degrade back to microUSB as there was too much confusion over the USB-C power port. Works just the same though.

ON is down (labelled with ON and a down arrow)
by rtlsdrblog
Mon Sep 09, 2019 6:01 am
Forum: KerberosSDR
Topic: Feature requests / development ideas
Replies: 17
Views: 1251

Re: Feature requests / development ideas

Hi, I think it would be good to add a NCO to shift the effective reception center frequency anywhere in the 2 MHz or so passband of the RTLSDRs. This is motivated mostly because if you use only the passband around zero frequency and use the RTLSDR LO to tune to the signal of interest then you have ...