DRM Software Radio Forums  

Go Back   DRM Software Radio Forums > DRM Software Radio - User Forums > Reception Results - Recent Posts
User Name
Password
FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 14-10-2018, 20:26   #1
G4TMV
Registered User
 
G4TMV's Avatar
 
Join Date: Feb 2015
Location: East Lancashire, north west England
Posts: 209
Mystery DRM Signal on 3260 kHz

Hi All,

Jordan Heyburn in Northern Ireland reported the following signal on the World of Radio mailing list, and I can hear it here as well, though not strong enough for a lock as yet. Someone on the list suggested that North Korea may be a suspect as they were supposed to have tested this mode. Maybe some of you will have more luck with getting an ID and can give Jordan an answer?

Jordan's original post:


"I am copying a DRM transmission on 3260kHz however it's too weak to get a lock. Any ideas?

0150 UTC Perseus SDR - Beverage (Japan wire) - Remote QTH Finland

On the other wires (SEA & Southern) the DRM signal is dramatically decreased.

Best Regards,

Jordan Heyburn"
__________________
Alan.

Modified NRD-525G with
Radiokit DRM Decoder Board,
SDRplay RSP-1A, SDR Console v3

Lancashire, UK
53:39.18N 02:10.28W
IO83vp

https://www.ndblist.info
G4TMV is offline   Reply With Quote
Old 15-10-2018, 04:15   #2
zfyoung
Registered User
 
Join Date: Aug 2006
Location: BaiSe, P.R. China @E10636′ N2355′
Posts: 240
Got it via KiwiSDR.

Unstable signal with wildly variable field strength. It seems generated from a good quality Tx station. I have the suspicion the encoded bit stream is purposely scrambled to prevent outsider from deciphering it (That is why DreaM can NOT display any useful/meaningful Info.). Also the center DC freq is quite odd (3262Khz).
zfyoung
Attached Images
File Type: gif 3262kHz.GIF (88.7 KB, 88 views)
__________________
Any kind of audio drop-out is worse than any kind of low quality audio: No audio, No log report.

My Rx location: GuangXi Province @ E10636′ N2355′
zfyoung is offline   Reply With Quote
Old 15-10-2018, 07:14   #3
MARCEL
Registered User
 
Join Date: Mar 2010
Location: Northeast France
Posts: 372
Hello,

I have this signal S9 of my S/Meters and SNR 7 to 9 db.

This signal and the mention CELT in the audio Codec remind me the same signal as on 4770 kHz with DRM A service!!!!! I think that it is the same station.

https://nsa39.casimages.com/img/2018...2915639800.jpg

https://nsa39.casimages.com/img/2018...2941693798.jpg
__________________
DRM:
Mixer Platine MF9 Mhz with Dream

Antenna:
Mantova Turbo 5/8 wave for 27 mhz
Long Wire 80 meter
MARCEL is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Forum Jump


All times are GMT. The time now is 14:16.


Powered by vBulletin Version 3.5.3
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.