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Sixten
31-03-2009, 08:07
Hi all.

New DRM station on 9535Mhz Radio Romania International. I have very strong QRM from jamming station on 9540Khz. So log is not so good.

http://www.rri.ro/art.shtml?lang=1&sec=20&art=20011
Sixten
31-03-2009, 19:02
Hi all..

SORRY very problem from AM on 9530 and 9540.

I listen to program over AM transmitter on 11735Khz . This is totaly clear cannel, so please switch over DRM to 11735. Thanks Sixten
Sixten
02-04-2009, 19:25
Hi all.

Better signal her this evning. Problem is not DRM TX in SNR ,big problem is strong splatter from VOA on 9530 and Kina on 9540 . If DRM is 44dbuV so is AM station 84dbuV . See picture of input spectrum .
Sixten
03-04-2009, 20:27
Hi all.

Low signal stringth and AM splatter first 20min. but 1722 UTC propagtion go up and signal stringth up to S9+20db in QSB so now better reciption .:) :) :)
Sixten
04-04-2009, 19:05
Hi all.


Very bad propagition today and fading from 34 to 74 dbuV. And strong splatter from 9540 AM
Sixten
07-04-2009, 19:07
Hi all.

Very strong signal stringth this evning. Only dropouts in down fading so AM spaltter from 9540 give problem. :) :) :) :)

Up to 74dbuV !!!!
Sixten
09-04-2009, 19:01
Hi all.

Sorry very bad propagation this evning but strong signal in max fading.
Sixten
10-04-2009, 20:50
Hi all.

Strong signal today but very splatter problem from strong AM on 9540 Khz
FritzWue
11-04-2009, 19:30
Problems with AM interference at + and - 5 kHz.
Audio source is obviously for AM, so low quality.
Nice to see feedback to Sixten directly! :)
I attached a little zipped mp3 recording of the interfering AM station on 9540 kHz.
This station is really wide, at least +/- 8 kHz.
Sixten
11-04-2009, 19:55
Hi all.

Very bad propagtion this evning. And AM splatter problem. :mad:
Digger
30-04-2009, 21:33
Not the best result here either.
FritzWue
01-05-2009, 21:18
Not good here tonight, telefone audio and 21 kbps.
Seems nobody can handle the modulator to adjust the bitrate or change the message text. :rolleyes:
Sixten
03-05-2009, 18:30
Hi all.

This freq. is not useful for DRM . And TX stop after 10min.
Sixten
23-05-2009, 20:22
Hi all.

Reciption this evning was best of all day. Strong signal and only AM from CRI on 9540 Khz . AM on 9530 Khz is close down. And I switch over to my LW on 50m , this antenna restrain signal from this direction with -10db is was better for DRM .Decoded Audio 95% ok . :)
Digger
01-07-2009, 21:18
Problematic frequency with a terrible adjacent splatter channel that spoiled all the fun...
mitajohn
02-08-2009, 19:18
Hi all,

I didn't expect a better result with the presence of these strong splatters. Who is going to listen to?
Bad frequency choice for my area (?), two strong AM TXs on +/- 5kHz. See the plot and the screen shot of the frequency spectra after DRM TX sign off.
Sixten
30-08-2009, 19:01
Hi all.


Better propagation for DRM on this freq. this evning.
FritzWue
04-09-2009, 19:01
To the end problems with a strong AM station on 9540 kHz.
FritzWue
11-09-2009, 20:23
Basically a good 25dB SNR signal with low audio quality, but often no reception possible due to interference from Radio Bejing 5 kHz up in AM with +/- 8kHz modulation.
Per
13-09-2009, 19:02
Hi,

A very short (!) reception, 2 minutes, then the station left the air @ 17:57 UTC.
Excellent signal, but only the left audio channel was used?
Nice txt msg:
Please send reception reports of this test transmission to c.hoerlle@tsb-ag.de
Best regards to Sixten in Sweden and thanks for the reports!
Sixten
20-09-2009, 18:59
Hi all.

Strong signal but deep fading down so splatter from 9540 give drop outs.
Per
25-09-2009, 18:31
Hi,

Today a slightly longer report, but with very bad result. AM interfernce from + 5 kHz.
Still only one audio channel? Do they never listen to their own broadcasts? :confused:

Time: 17:07-17:25 UTC.
Sixten
07-04-2010, 18:29
Hi all.

Good signal in start but 1730 total balckout of propagatin. :confused:
petecchiaro
12-04-2010, 19:04
Last 10min transmission log.
Good signal sometimes fading causes audio drops

PS program ID to be adjusted!
petecchiaro
14-04-2010, 18:41
12 min log from Rome. Good signal but no audio due to an intereference on 9540 (probably China)..

program ID still to be adjusted
FritzWue
30-04-2011, 21:06
21 kbps and audio only up to 5 kHz:
petecchiaro
28-07-2011, 18:37
30 min log from Rome;
at the end some interference at 9540 decreased performance.

Program ID still not compliant with HFCC
Digger
09-09-2011, 21:05
Another log from Romania today. Good reception.