DTK Jülich on 5972 kHz (actually 5970 kHz)

[sveron]

Hello to all,

As seen in the latest (#63) edition of the DX Listening Digest by Glenn Hauser (www.worldofradio.com), there is a temporary DRM transmission from Jülich :

Deutsche Telekom from Apr. 10 to May 10:
0600-0700 on 5972 JUL 040 kW / 340 deg to NoEu in DRM mode
1500-1600 on 5972 JUL 040 kW / 240 deg to SoEu in DRM mode

It is now transmitting with the following parameters a data-only stream :
DRM mode B, 5 kHz bandwith,
SDC 4QAM, MSC 16QAM,
interleaver 2s,
date/time, which are false (Aug. 13 2004 at 10:20 UT this afternoon),
Data service : 5,52 kbps EEP with only a short ID 123456 but no stream identification.

Very good 'reception' here this afternoon (SNR 20dB). No data could be decoded.

73, de Stephane

[Andreas]

Just for fun I made a log of this (test?) transmission.

Quite good results. Please note that I entered the false QRG of 5955 kHz to get the correct distance to the Tx.

[Digger]

Hi,

Nice and quiet, but here is a log just for fun too. Strong signal here: S9 +30 dB = 58 dBuV if substituted with my Stabilock 4040.

Terje

[Andreas]

I just checked the morning transmission. Signal was very weak, SNR 5 to 6 dB only. No log.

Indeed perfect digital silence (except a little bit of hum from the external PC
speakers :rolleyes: )

No sync at all with DRMSWR.

[simone]

No sync at all with DRMSWR.
Hi Andreas,
it should also work with FhG, seems your freq. offset is too large as you don´t tune properly on this signal, with the 5 kHz wide signal don´t tune to the center of the spectrum, I guess with a Rx using an IF of 12kHz you need to tune to 5970 kHz (I think you are all on 5972 kHz)
Simone

[Andreas]

I guess with a Rx using an IF of 12kHz you need to tune to 5970 kHz (I think you are all on 5972 kHz)
Simone

Thank you very much! Exactly as you said, when I tune on 5970 kHz FhG is working also. SNR is about 1 to 2 dB lower compared to DREAM as in most cases. Signal as such seems to be weaker than yesterday.

[stegewicht]

Here´s a Reception-Report for 5972 kHz.

[dk8cb]

The last few minutes gave a low SNR due to strong on-channel interference.

Roland

[johnn]

Late developer on this TX. Should I see any data? Dream seems to work as for others using 5970kHz.
SNR up to 22dB with DRT1 at 1530hrs, no log.

[carknue]

The frequency 5972 khz is wrong, it should be 5970khz. It is half bandwidth mode. Otherwise VOR on 693 khz were on 701 khz. For Dream it doesn't matter but the DRm Software Radio does not sync on 5972 khz, but it does on 5970khz.

[simone]

... exactly, see my post above from April 21st ;)
Simone

[drmdab]

I don't know if anyone is still interested in the solution of this "mystery":
It was a Fraunhofer test from Jülich. ;)

Very sad there aren't any test transmissions today, I've never heard one but I like them... :)