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Old 31-03-2009, 07:07   #1
Sixten
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9535 kHz SNR Tiganesti E2

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
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File Type: png 9535-090330-1702-1757-SIXTEN .png (49.8 KB, 137 views)
File Type: jpg 9535_Input.jpg (44.7 KB, 116 views)
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Last edited by Sixten : 31-03-2009 at 07:12.
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Old 31-03-2009, 18:02   #2
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Mar.31

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
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File Type: png 9535-090331-1703-1748-SIXTEN .png (48.0 KB, 105 views)
File Type: jpg 9535_drm.jpg (35.3 KB, 112 views)
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Old 02-04-2009, 18:25   #3
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Apr.02

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 .
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File Type: png 9535-090402-1703-1755-SIXTEN .png (55.2 KB, 91 views)
File Type: jpg 9535_Splatter.jpg (36.5 KB, 102 views)
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Old 03-04-2009, 19:27   #4
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Apr.03

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 .
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Old 04-04-2009, 18:05   #5
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Apr.04

Hi all.


Very bad propagition today and fading from 34 to 74 dbuV. And strong splatter from 9540 AM
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Old 07-04-2009, 18:07   #6
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Apr.07

Hi all.

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

Up to 74dbuV !!!!
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Old 09-04-2009, 18:01   #7
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Apr.09

Hi all.

Sorry very bad propagation this evning but strong signal in max fading.
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Old 10-04-2009, 19:50   #8
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Apr.10

Hi all.

Strong signal today but very splatter problem from strong AM on 9540 Khz
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Old 11-04-2009, 18:30   #9
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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.
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File Type: png 9535_090411_1700_DK6QI.png (72.8 KB, 74 views)
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File Type: zip SAM 9,540000MHz 11.04.2009 19 59 44.zip (71.7 KB, 79 views)
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Old 11-04-2009, 18:55   #10
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Apr.11

Hi all.

Very bad propagtion this evning. And AM splatter problem.
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Old 30-04-2009, 20:33   #11
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Not the best result here either.
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File Type: png 9535-090430-1731-1746-HED362.png (40.4 KB, 79 views)
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Old 01-05-2009, 20:18   #12
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Not good here tonight, telefone audio and 21 kbps.
Seems nobody can handle the modulator to adjust the bitrate or change the message text.
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File Type: png 9535_090501_1737_DK6QI.png (11.8 KB, 71 views)
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Old 03-05-2009, 17:30   #13
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Hi all.

This freq. is not useful for DRM . And TX stop after 10min.
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Old 23-05-2009, 19:22   #14
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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 .
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Last edited by Sixten : 23-05-2009 at 19:25.
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Old 01-07-2009, 20:18   #15
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Problematic frequency with a terrible adjacent splatter channel that spoiled all the fun...
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