Search found 47 matches

by Remon
Mon Aug 20, 2018 12:42 am
Forum: RTL-SDR Discussion
Topic: Popping noises
Replies: 5
Views: 3077

Re: Popping noises

I'm running the dongle at 2.048 MSPS over a local LAN network with rtl_tcp. I'm currently testing my spare dongle for 2 days with no issues at all. This is the rtl_test output after letting it run for 5 minutes from the dongle without problems: [email protected]:~/rtl-sdr $ rtl_test Found 1 device(s): ...
by Remon
Sat Aug 18, 2018 2:02 am
Forum: RTL-SDR Discussion
Topic: Popping noises
Replies: 5
Views: 3077

Popping noises

Does anyone else have popping noises during listening? It sounds like a recording with a microphone without wind screen / pop filter. I do hear it mostly on the 70 cm band. I can hear it during transmissions but also with static noise while there is no signal. With audio filtering enabled the poppin...
by Remon
Fri Aug 17, 2018 12:21 am
Forum: Troubleshooting Help
Topic: Decoding Issues
Replies: 8
Views: 4527

Re: Decoding Issues

You also should set the bandwidth to 34 kHz instead of 250 kHz
by Remon
Tue Jul 24, 2018 1:11 pm
Forum: RTL-SDR Discussion
Topic: Ground RTL-SDR to mast. Good or bad idea?
Replies: 3
Views: 2439

Re: Ground RTL-SDR to mast. Good or bad idea?

I do not necessarily want to ground everything. Nothing is properly grounded, it's just an 30 mm diameter aluminium pipe with an Diamond X30N antenna on top of it on the attic. I had this same setup around 10 years ago with a coax cable running to a lower floor. The reason I want to use cable ties t...
by Remon
Mon Jul 23, 2018 9:35 am
Forum: RTL-SDR Discussion
Topic: Ground RTL-SDR to mast. Good or bad idea?
Replies: 3
Views: 2439

Re: Ground RTL-SDR to mast. Good or bad idea?

Other concern is that the ground from the dongle to the ground of the antenna is choosing the path of less resistance which can be the mast tube instead of the coax shielding. Could this affect the coax cable characteristics?
by Remon
Sun Jul 22, 2018 10:36 pm
Forum: User Projects
Topic: TETRA Trunk Tracker for use with SDR# and TETRA Demodulator plug-in
Replies: 55
Views: 115606

Re: TETRA Trunk Tracker for use with SDR# and TETRA Demodulator plug-in

I'm not sure how I fixed it (probably a reboot or hide encrypted data option) but I don't hear the encrypted voice on low volume anymore. :) Something else I noticed: TTT is setting the WFM bandwidth to 26 kHz, while I see people around the internet mentioning or advising 25 kHz, 40 kHz, 48 kHz, etc...
by Remon
Sun Jul 22, 2018 2:43 pm
Forum: Troubleshooting Help
Topic: CAN NOT OPEN AIRSPY DEVICE
Replies: 2
Views: 3464

Re: CAN NOT OPEN AIRSPY DEVICE

It's simply because you don't have an Airspy device.
by Remon
Fri Jul 20, 2018 3:53 pm
Forum: User Projects
Topic: TETRA Trunk Tracker for use with SDR# and TETRA Demodulator plug-in
Replies: 55
Views: 115606

Re: TETRA Trunk Tracker for use with SDR# and TETRA Demodulator plug-in

Thank you for testing. This IQ base band sample was just for testing if the volume got louder at your setup. Due to the crashing recording plugin I wasn't able to make a recording to catch the behaviour described at scenario 3 in my long post in this thread. However TTT is also suppressing those cal...
by Remon
Fri Jul 20, 2018 2:17 pm
Forum: User Projects
Topic: TETRA Trunk Tracker for use with SDR# and TETRA Demodulator plug-in
Replies: 55
Views: 115606

Re: TETRA Trunk Tracker for use with SDR# and TETRA Demodulator plug-in

I think the Tetra network behaviour is different in Australia. In the Netherlands there is no control only channel. It's all more or less CC/VC combined. Could you do one more test for me please? Because I hear the encrypted voice with my volume at only 15%. Just to make sure I don't have audio leak...
by Remon
Fri Jul 20, 2018 10:20 am
Forum: User Projects
Topic: TETRA Trunk Tracker for use with SDR# and TETRA Demodulator plug-in
Replies: 55
Views: 115606

Re: TETRA Trunk Tracker for use with SDR# and TETRA Demodulator plug-in

First some background information about the Tetra Demodulator plugin and the bugs it got (maybe it helps understanding the problem). I already tried to contact TSSDR on the Russian forum but he hasn't been active for while. I cut this reply in 3 chapters to make it more readable. There are 3 types o...