Search found 193 matches

by DanubeBCL
Fri Oct 27, 2017 10:33 am
Forum: General
Topic: FSK
Replies: 3
Views: 1717

Re: FSK

and they seem to have an FSK “button”, which made me wonder and I thought I should ask on this forum. The SDR softwares follow a different approach. Some keep the nominal frequency and shift the passband when digi modes are selected, others keep the passband and shift the frequency. When a software...
by DanubeBCL
Tue Oct 24, 2017 10:47 am
Forum: General
Topic: Another odd signal (or signal-like phenomenon)
Replies: 4
Views: 2436

Re: Another odd signal (or signal-like phenomenon)

See for example https://en.wikipedia.org/wiki/Ionosonde
Inososonde spurs will frequently appear daily on various SW bands on your spectrum/sonogram. Normal business on SW.
73, Heinrich
by DanubeBCL
Mon Oct 23, 2017 11:43 am
Forum: General
Topic: Buzz in AM mode
Replies: 4
Views: 1940

Re: Buzz in AM mode

There are often ground loops between the antenna ground and PC/audio amplifier ground. You seem to have a lot of 50 Hz and harmonics in both receivers. I think the SDR software for the RTL dongle has a highpass filter suppressing the 50 Hz part more than SDRUno. Or do you use the same SDR software f...
by DanubeBCL
Sat Oct 21, 2017 8:43 am
Forum: General
Topic: Odd signals and other unusual patterns
Replies: 9
Views: 2654

Re: Odd signals and other unusual patterns

Do a search on the term "CODAR". https://www.sigidwiki.com/wiki/CODAR https://www.youtube.com/watch?v=8OF-yhrtqKo I cannot explain your patterns on both sides of 10 MHz. I have never seen them. Your "spikes" look pretty much like computer and/or monitor noise. Try to touch your s...
by DanubeBCL
Fri Oct 20, 2017 8:42 am
Forum: General
Topic: SDRuno freq control with WSJT-X WSPR????
Replies: 7
Views: 3905

Re: SDRuno freq control with WSJT-X WSPR????

Seems to be related with SDRUno. Here WSJT-X (1.70) even crashes shortly after setting a band. I tried the same wit PowerSDR mRX: This works. All frequencies correct, no crash, no 55 Hz issue. It's not related to com0com, I used VSPM (K5FR). I did not investigate further, but it seems to me there is...
by DanubeBCL
Tue Oct 03, 2017 2:32 pm
Forum: New Users' experiences
Topic: PC (laptop) power induces significant noise
Replies: 16
Views: 10830

Re: PC (laptop) power induces significant noise

I have the same issue and run the laptop unplugged, however I'm still plagued with interference across all band Hello, a typical pattern of switched mode devices, mainly switched power supplies. Harmonics spaced between appr. 15 kHz and appr. 100 kHz, depending on the device. We all have such patte...
by DanubeBCL
Wed Sep 20, 2017 9:31 am
Forum: New Users' experiences
Topic: DRM reception with SDRPlay and SDRUno
Replies: 12
Views: 8090

Re: DRM reception with SDRPlay and SDRUno

Could someone kindly post a few DRM freqs receivable in the USA? The attached zip file contains a HTML table (open with your internet browser after extracting) with a mix from AOKI and EIBI schedules with currently listed DRM broadcast. Please note that the list contains duplicates (AOKI/EIBI) whic...
by DanubeBCL
Wed Sep 13, 2017 3:47 pm
Forum: SDR Antennas
Topic: RA0SMS Miniwhip bad performance on SDRPlay
Replies: 36
Views: 24539

Re: RA0SMS Miniwhip bad performance on SDRPlay

I had very clear reception until may, when the ventillation system of the building is modernized, and added inverters to the fan engines. The result is S6-S9 noise around from 8 to 17 MHz. Yes, noise generators are becoming more and more. Photovoltic inverters, lawn mowing robots, switched power su...
by DanubeBCL
Sat Sep 02, 2017 5:58 pm
Forum: SDRuno
Topic: Drivers detected as virus
Replies: 6
Views: 3315

Re: Drivers detected as virus

This is normal business. Many radio softwares (commercial or freeware) are reported evil by a couple of virus engines when you upload them to Virustotal. Some virus engines change their mind daily. Today a software is benign, tomorrow exactly the same software is evil all of a sudden. Next week it i...
by DanubeBCL
Fri Sep 01, 2017 6:02 am
Forum: SDRuno
Topic: Drivers detected as virus
Replies: 6
Views: 3315

Re: Drivers detected as virus

Really strange. I have SDRplay_SDRuno_Installer_1.13.exe and SDRplay_ExtIO_Installer_1.0_2.exe on my PC for months. But Windows Defender never found anything strange. I probed the files manually right now with the latest virus definitions for Windows Defender: No infection found!
73, Heinrich

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