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Mitsuru Ito
10-01-2007, 07:35
Hi all,
This is log file of VOR on 15640KHz in Japan.
There are no names of station (VOR) only dots.
I can not faind any informations about-
this signal at HP of VOR.
Andrew
12-01-2007, 12:39
Hi Mitsuro,

test transmissions with VOR program on 15640 kHz were transmitted from Komsomolsk-na-Amure, TX also belongs to RTRN (Russian Television and Radio broadcasting Net). Broadcasting target is China, so you received side lobe only.

Best regards,

Andrew
Mitsuru Ito
13-01-2007, 02:13
Hi andrew
Many thanks for informations of VOR.
I understood reason of instability in Japan.
It is not soo good stability in thismorning too .
zfyoung
15-01-2007, 06:50
Broadcasting target is ChinaReally?Ah, That can explain the unusually strong signal here in Shenzhen, right next to Hongkong in southern China.

I'll upload log file when I can.
zfyoung
16-01-2007, 00:58
Strong and relatively stable signal here. Because of terrible Electric-Magnetic conditions here in urban center, reception is not perfect. Audio source could be better, the English broadcast service sounds a little dull.
zfyoung
16-01-2007, 01:02
Another log file.
zfyoung
22-01-2007, 00:33
Weak and unstable signal. What happened? Did they change the direction of transmission antenas? If this is purely due to bad propagation conditions, they might try SFN as well.
zfyoung
23-01-2007, 05:40
Unstable signal. Channel impulse response is good, yet suffers from moments of deep fading. I prefer multiple echos rather than single echo for that case gives better stability in signal strength.
zfyoung
23-01-2007, 05:50
Only short log, good audio quality.Still plagued with deep fading.
zfyoung
25-01-2007, 06:25
Strong signal, not robust enough though.
zfyoung
29-01-2007, 00:48
Very bad result.
zfyoung
29-01-2007, 01:02
a roller-coaster ride.
Owdjim
04-02-2007, 07:04
Hi All

I received a very,very weak signal on 15640 kHz for just the last couple of minutes before sign-off today.

Cheers, Chris
zfyoung
05-02-2007, 00:05
No major improvement in weeks! Audio is on and off.
For good reception,they should :

a. use Robust Mode A,since the Channel Impulse Response is quite compact;
b. use lower Code Rate for channel coding;
c. 250 degree beam is too large. they should aim at the densly populated area in the coastal region.
Digger
06-03-2008, 13:53
There is something on 15640 kHz now at 14:50 UT that sounds like a DRM signal, but neither Dream nor the DRM Software Radio reacts to the signal at all. Any hints? :confused:



QRT at 15:00 sharp :confused: