|
07-08-2006, 08:36
|
#1 |
|
Registered User
Join Date: Apr 2003
Location: Bad Wildungen, Germany
Posts: 121
|
OldieStar Radio on 1575 kHz
Hi all,
new DRM station in Germany: OldieStar Radio on 1575 kHz from Burg. See screenshot. 73, Klaus
__________________
Equipment: Winradio WR-G303i magnetic longwire balun (12,5 m) DX-10 active antenna http://www.drm-dx.de |
|
|
|
07-08-2006, 16:49
|
#2 |
|
Registered User
Join Date: Apr 2003
Location: Bad Wildungen, Germany
Posts: 121
|
Transmission times in DRM on 1575 kHz are 0800-1400 UT with 20 kW and 2200-0400 UT with 100 kW.
At the other times the frequency is used by VoR in AM. 73, Klaus
__________________
Equipment: Winradio WR-G303i magnetic longwire balun (12,5 m) DX-10 active antenna http://www.drm-dx.de |
|
|
|
|
07-08-2006, 22:12
|
#3 |
|
Registered User
Join Date: Dec 2002
Location: Frankfurt, Germany
Posts: 1,314
|
Strong signal, but an impulse response as long as the chineese wall.They use the wrong antenna type at night. Around 12 db and no audio. No AM Interference is visible.
__________________
regards, Carsten AOR 7030 + Wellbrook ALA 1530P & DWT + Degen DE31 + TG33 Free DRM Tools for analysing, controling and automating your DRM reception and logging |
|
|
|
|
08-08-2006, 04:11
|
#4 |
|
simone
Join Date: Jan 2003
Location: Bad Salzschlirf, Hessen, Germany
Posts: 7,922
|
Bad results, not very strong signal and co-channel interference in the last hour this morning, also something was wrong with the audio feed!
Simone |
|
|
|
|
08-08-2006, 04:14
|
#5 |
|
Roland
Join Date: Mar 2004
Location: Munich, Germany
Posts: 2,748
|
A bad result
Quite a bad result this morning with a long impulse response and in addition on-channel interference which could not be nulled.
OFDM symbols were transmitted but without audio. See screenshot for spectrum, WMER and impulse response. Roland |
|
|
|
|
08-08-2006, 04:15
|
#6 |
|
Roland
Join Date: Mar 2004
Location: Munich, Germany
Posts: 2,748
|
Log
And here is the log.
Roland |
|
|
|
|
08-08-2006, 04:20
|
#7 | |
|
simone
Join Date: Jan 2003
Location: Bad Salzschlirf, Hessen, Germany
Posts: 7,922
|
Quote:
Hi Roland, there was audio but very low level see attachment, with speakers set to maximum I could hear some music. Simone |
|
|
|
|
|
08-08-2006, 04:29
|
#8 | |
|
Roland
Join Date: Mar 2004
Location: Munich, Germany
Posts: 2,748
|
Quote:
Well, I didn't hear any with speakers adjusted for normal but low audio levels but I was also busy trying to find an optimum loop position but to no avail... I have read that an NVIS antenna is used and the results are exactly of the kind that I expected. I think one should forget about DRM and NVIS antennas, they just don't fit together. Roland |
|
|
|
|
|
08-08-2006, 05:32
|
#9 |
|
Registered User
Join Date: Jun 2006
Location: Bremen / Germany
Posts: 51
|
Not much, but a signal for me:
__________________
73 de DE8MSH OP Marco Loc JO43kb |
|
|
|
|
08-08-2006, 22:24
|
#10 |
|
Roland
Join Date: Mar 2004
Location: Munich, Germany
Posts: 2,748
|
At night
At night, the impulse response looks even worse than it did in the morning when it was not completely dark anymore.
Not much audio can be decoded from a signal with so many echoes. If audio can be decoded, it is only barely audible even if all volume sliders are fully up here. Roland |
|
|
|
|
08-08-2006, 22:38
|
#11 |
|
Roland
Join Date: Mar 2004
Location: Munich, Germany
Posts: 2,748
|
August 8
Not worth further logging.
Roland |
|
|
|
|
09-08-2006, 04:13
|
#12 |
|
simone
Join Date: Jan 2003
Location: Bad Salzschlirf, Hessen, Germany
Posts: 7,922
|
Bad results again, a weak signal and co-channel interference.
Still the audio problem with extremely low audio level. Simone |
|
|
|
|
09-08-2006, 04:38
|
#13 |
|
Registered User
Join Date: Jun 2006
Location: Bremen / Germany
Posts: 51
|
This is what I get with my Aircoil:
__________________
73 de DE8MSH OP Marco Loc JO43kb |
|
|
|
|
09-08-2006, 04:42
|
#14 |
|
Registered User
Join Date: Mar 2006
Location: 25km SE Karlsruhe
Posts: 163
|
Signal can be seen
 but nothing to be heard WDR on 1593 works better - and is in similar distance with less power ...
__________________
-Bernhard- |
|
|
|
|
09-08-2006, 23:59
|
#15 |
|
Roland
Join Date: Mar 2004
Location: Munich, Germany
Posts: 2,748
|
August 9
Reception of the DRM signal as such was much better than on the days before. However, interference was often strong and although the interfering carrier was only a few dB above the averaged DRM signal, it still did cause a deep notch in the WMER vs carrier plot.
A lower bitrate at a better protection level (B/A = 0/0) might improve the situation. The impulse response was considerably shorter than on the days before, it still had a lot of peaks but their amplitudes fell off much faster than before. Were there any changes on the antenna used at night or was it just a change in propagation that made the difference? The audio problem was unchanged so it was / is still impossible to listen to normal audio. Roland |
|
|
|
 |
| Thread Tools | Search this Thread |
| Display Modes | |
|
|
Linear Mode
