Re: [HamBrewers] Re: What could be the source of this QRM?

 

Hi,

 

Here are some interesting info on common QRM signatures:

http://www.iarums-r1.org/iarums/sound/main.html

 

Other common RF soundbytes are listed here:

http://www.w1hkj.com/FldigiHelp-3.12/Modes/index.htm
http://www.nonstopsystems.com/radio/radio-sounds.html
http://www.kb9ukd.com/digital/

Anil

From: Rajesh K <kc2kby@airtelmail.in>
To: HamBrewers@yahoogroups.com
Sent: Sunday, January 8, 2012 7:21 AM
Subject: RE: [HamBrewers] Re: What could be the source of this QRM?

 

Thanks Anil. Good work. Sounds like a digital signal. I'll continue the research. It is sporadic and not occurring on daily basis.

 

Rajesh.

 

From: HamBrewers@yahoogroups.com [mailto:HamBrewers@yahoogroups.com] On Behalf Of Anil Kumar
Sent: Saturday, January 07, 2012 10:51 AM
To: HamBrewers@yahoogroups.com
Subject: [HamBrewers] Re: What could be the source of this QRM? [2 Attachments]

 

 

[Attachment(s) from Anil Kumar included below]

Hi Rajesh,

 

I often noticed this qrm. I live in Bangalore. Occurance feels quite sporadic do us SWLs.  Not sure about them belonging to any specific SW spectrum.

I have isolated(DSP) the qrm from your sample and attached here for possible research.

 

Regards,

Anil

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