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dk8cb
25-10-2005, 23:34
Quite a number of fade-outs today but the local interference level was also high with my neighbour's low-voltage lighting being switched on. Still good to listen to however.

Nice to hear that the sync loss problem is being investigated closer.

Roland

simone
26-10-2005, 06:24
Hi all,
quite good again last night, maybe a local problem at the beginning ;)
@ James: Thanks for the information on the sync loss problem, it occured again 3 times, see attachment
Simone

FritzWue
26-10-2005, 23:10
The first dropout was caused by plugging from the wire to the loop antenna, the others wasn't me.

dk8cb
26-10-2005, 23:21
Some dropouts, partly due to a high local noise level.

Roland

simone
27-10-2005, 06:23
Hi all,
good conditions last night, all dips in the graph Tx related (sync loss problem and/or interruptions). Interestingly the interruptions also occured simultaneously on HF (5875 kHz)
Simone

FritzWue
27-10-2005, 18:18
Driving from 53754 Sankt Augustin to 48712 Gescher.
Some dropouts without any visible reason.

dk8cb
27-10-2005, 23:59
Similar problems as seen on shortwave today could be observed on mediumwave as well

Roland

simone
28-10-2005, 06:07
Hi all,
some longer breaks in transmission last night, in the first hour it did not look like it is worth recording a logfile,
later good results when there was a signal, also the sync loss problem occured again, see attachment
Simone

simone
29-10-2005, 07:37
Hi all,
no such breaks in transmission as the night before, again a few sync losses, some caused by interruptions of the signal, see attachment
Simone

dk8cb
29-10-2005, 10:03
Hi,

partly a weak signal last night.

Roland

simone
29-10-2005, 10:07
Hi all,
pretty good results for the first 2.5 hours this morning (besides the known problems), see attachment
Btw local sunrise now at 0610 UTC.
Simone

carknue
29-10-2005, 23:31
Not perfect.

simone
30-10-2005, 17:22
Hi all,
quite good last night, besides the known problems, see attachment
73, Simone

dk8cb
30-10-2005, 23:05
Local noise level was high and there was also quite a bit of fading. I noticed a sync loss at 22:27 but there may have been others as well.


Roland

simone
31-10-2005, 07:49
Hi all,
some dropouts when the signal was weaker from 1750- 1850, quite good for the rest last night, sync loss problem occured only once, see attachment
Simone

simone
31-10-2005, 09:14
Hi all,
good results at the start this morning (sync loss problem once) compared to the strange results yesterday which might have been Tx related, but no signal today after 0704 until I stopped the logfile at 0850, see comparison with yesterday attached
Simone

edit: Transmission was continued from 0945

simone
01-11-2005, 05:17
Hi all,
a few dropouts last night at times of deep fading, but also interruptions and the sync loss problem occured, see attachment
Simone

simone
01-11-2005, 12:05
Hi all,
pretty good results early this morning until there was again a break in transmission, see attachment
Simone

simone
01-11-2005, 13:16
Hi all,
good results also after transmission was continued until signal got weaker at 1230!
Simone

df9rb
01-11-2005, 13:32
Good also during daylight with the EWE-antenna! A few deep fadings and also some interruptions in data stream. I presume this because the signal was not weak during these interruptions.

Bernd, DF9RB

dk8cb
01-11-2005, 13:35
Hi,

not a good result last night with a sometimes long impulse response that seemed to be a foretaste of what's coming up in winter.

Roland

hsseppo
01-11-2005, 17:53
Hi,

1296 kHz was only 84% in Helsinki

Seppo

dk8cb
01-11-2005, 23:34
Hi,

today, I modified a cheap PLL LW/MW/SW/FM single conversion receiver which I had bought on ebay for 1.51 EUR + postage (which amounted to 5.90 EUR, a lot more than the receiver itself). The receiver is not yet fully optimized for DRM and I am still working on improving it but reception on it was already remarkably good.
The largest dropout in the log was caused by myself. There seemed to be sync losses at 22:10 and 22:49 UTC.
The receiver with its built-in ferrite antenna was inductively coupled to the loop by placing it about 30 centimeters away.

Roland

simone
02-11-2005, 06:08
Hi all,
good conditions, most dips caused by the known problems (snyc loss problem and interruptions)
Simone

jbriggs
02-11-2005, 12:17
This morning we installed an alternate DRM exciter to see if this helps with some of the problems. This in service at 12:00 on 2nd. So we are very interested to see reports of any breaks or sync losses.
Thanks, James

carknue
02-11-2005, 22:08
Not perfect.

dk8cb
03-11-2005, 01:13
Hi,

here is a four hour log, transmission continued after midnight local time and still does.

There were many moments when the impulse response looked bad and when signal strength was also momentarily low. This caused quite a number of dropouts. I did not notice any reception problems apart from during those moments. Except from the occasional pulse spike, there was no noticeable local interference. I also did not see any signal interruptions during my logging period.

Unfortunately, reception quickly seems to become worse as winter approaches.

Roland

simone
03-11-2005, 07:23
Hi all,
lot of fading but good results, two dropouts during deep fading, no sync losses or interruptions, see attachment
Simone

Btw, there still was a signal before 0500 this morning.

FritzWue
03-11-2005, 07:58
The winter conditions with weird impulse response at night are coming again. Later after sunrise the loop usually is not as stable as the wire antenna.

hsseppo
03-11-2005, 20:15
Hi,

just good enough for listening, 94% decoded.

73, Seppo

dk8cb
03-11-2005, 23:06
Hi,

much better conditions than yesterday. Reception was excellent. Unfortunately, I could only listen for a little more than an hour. I did not notice any technical problems.

Roland

simone
04-11-2005, 06:20
Hi James, all,
no sync losses/ interruptions, so after a long time again a 100% result for the nearly 5 hours that I recorded the logfile last night :)!
Simone

dk8cb
04-11-2005, 09:58
Hi,

a period with good reception in Munich this morning but I tuned to another frequency when there was a deep fade-out.

Roland

hsseppo
04-11-2005, 19:19
Hi,

rather good today. 96% decoded.

Seppo

dk8cb
04-11-2005, 23:03
Hi,

there were a few periods when Orfordness' signal faded out but in between, signal was quite strong and the impulse response looked perfect, much unlike the day before yesterday.

Roland

simone
05-11-2005, 07:47
Hi all,
again no Tx related problems last night, 3 dips in the graph at times of deep fading, see attachment
Simone

carknue
05-11-2005, 11:05
Some results from the early morning. Not good.

simone
05-11-2005, 12:54
Hi all,
good results this morning until 0900, except the dropouts in the first 10min, not sure what caused the problems. Later no Tx related dropouts.
Simone

dk8cb
05-11-2005, 23:06
Not so bad today. No problems with the impulse response but signal lost strength during the course of my logging period.

I did not notice any technical problems on the transmitted signal, the old "rejuvenated" Thales seems to do its job perfectly.

Roland

simone
06-11-2005, 10:15
Hi all,
excellent results last night, strong and stable signal, no Tx problems, perfect decoding, see 6 hours log attached
Simone

simone
06-11-2005, 10:23
... and also quite good this morning until 0930 (sunrise 0623), a few dropouts when the signal was weaker around 0600, see attachment
Simone

jbriggs
06-11-2005, 16:04
Thanks for the posts so far, it seems no "sync loss" or short breaks in the RF field strength (not fading! the previous reported problems) have been observed since the 2nd November? Please keep posting observations here! Thanks. James

dk8cb
06-11-2005, 23:12
Hi,

Strong co-channel interference at times but also a good signal in between. No problems that were associated with the impulse response.
The big dropout was of my own making, I accidentally destroyed the power connection and had to resolder it. :rolleyes:

No trace of any transmitter problems.

Roland

simone
07-11-2005, 06:20
Hi James, all,
no more problems since 2nd Nov, good conditions again last night, another 100% result for a 5 hour period, see attachment
Simone

FritzWue
07-11-2005, 08:29
Although it's only mono.......what a relief to listen to the better 21.6kbps audio quality on BBC mediumwave after all the telephone and digitalized AM quality many stations offer on shortwave.

hsseppo
07-11-2005, 20:19
Hi all,

BBC 1296 kHz was strong today in Helsinki. 99% decoded.

Seppo

dk8cb
07-11-2005, 23:05
A very good result considering the fact that the local noise level was high and that there was a strong on-channel signal at times.

I did not notice any interruptions or sync losses.

Roland

simone
08-11-2005, 06:19
Hi all,
quite good results last night from 1715, great that the problems noticed earlier in the evening did not reoccur during the night :)!
Simone

FritzWue
08-11-2005, 22:15
DRM at its best, good signal, audio close to FM at 21.6kbps although mono, and good content.

dk8cb
08-11-2005, 23:13
A high local noise level from my neighbour's low-voltage lighting and also occasional fading with on-channel interference.

Roland

simone
09-11-2005, 06:26
Hi all,
good conditions last night, strong signal, no problems with fading and interferers from 1835, also no Tx related problems, see attachment
Simone

hsseppo
09-11-2005, 20:18
Hi,

In Helsinki 92% decoded during 271 minutes.

73, Seppo

dk8cb
10-11-2005, 08:58
A bit of fading and local noise as well.

Roland

simone
10-11-2005, 16:49
Hi all,
sorry Iīm a bit late with last nights results ;)
Pretty good conditions and no Tx related problems!
Btw also good results at the beginning early this morning.
Simone

FritzWue
10-11-2005, 18:36
...and this is the result in darkness on a short vertical antenna ontop of a car with onchannel AM interference.
Driving from 59368 Werne to 48712 Gescher.
I could not identify the AM station, perhaps from Spain.
It's the old game, not enough signal level.... :p

dk8cb
10-11-2005, 19:25
Originally posted by FritzWue

It's the old game, not enough signal level.... :p

But enough signal from the interfering stations to destroy almost everything. :mad:

Roland

hsseppo
10-11-2005, 20:16
Hi all,

today I tested a simple 1 meter diameter indoor coaxial shielded loop antenna. It was clearly better than my 5 meter outdoor wire. 97% decoded.

73, Seppo

simone
11-11-2005, 06:24
Hi all,
a few dropouts in the first half hour (including 2 sync losses, not sure about the reason), quite good later despite sometimes a weak signal and strong AM interferers
Simone

dk8cb
11-11-2005, 09:57
Not bad towards the end despite local interference.

Roland

FritzWue
11-11-2005, 14:57
Driving from Duisburg to Dortmund via A2.
Three major dropouts:
1. high voltage line
2. tunnel
3. high voltage line

simone
12-11-2005, 09:15
Hi all,
good conditions and great results last night, see attachment
Simone

dk8cb
12-11-2005, 10:59
A few dropouts during fading but good in between.

Roland

carknue
13-11-2005, 18:00
The only working QRG now seems to have a hickup...:D

Andreas
13-11-2005, 18:06
Oh dear, they seem to HAVE a problem.

Btw 5875 is still working, with some drop-outs, while all other "usual suspects" in the 49m band are silent :confused: :confused: :confused: :confused: :confused: :confused: :confused: :confused: :confused: :confused:

dk8cb
13-11-2005, 19:18
Sounds really funny, listen to the attachment if you can't receive it yourself.

Roland

dk8cb
13-11-2005, 19:36
The hickupping person doesn't get his throat cleared because it seems to be throttled, ie bandwidth is only about 9.6 kHz, see attachment. :D

Does he say "family structure"?

Roland

carknue
13-11-2005, 20:12
I "love" totally automated stations with no human being around to fix this. What a luck that there are still no DRM Radios in the stores, so nobody will take a note of this.

dk8cb
13-11-2005, 20:40
I really miss the music from the WOMAD music festival which would have been broadcast today.

Roland

jbriggs
13-11-2005, 22:33
Sorry for the fault, we never saw this one before, so it is important to find out the cause rather than simply rebooting all the equipment. It could be at the studio or transmitter site, as from the description it is not obvious what is the cause. So it will be fixed in the morning once we find out exactly what the cause is.

dk8cb
13-11-2005, 22:41
Originally posted by jbriggs
... so it is important to find out the cause rather than simply rebooting all the equipment.

If the scheduled end of transmission at 23:00 UTC will not clear the current state as well ...
Or is it just the TX that is switched off?

Roland

simone
14-11-2005, 05:11
Hi James, all,
the problem ist still the same at the beginning of the transmission this morning, so good for investigating whatīs causing the problem.
Simone

jbriggs
14-11-2005, 09:12
Hi Roland, it looked like a software fault rather than any transmitter fault, so I was expecting the same fault this morning. In fact it seems the Thales Modulator PC at Orfordness has crashed so the fault was at Orfordness.

FritzWue
14-11-2005, 18:11
Orfordness working again this afternoon.
Driving from Osnabrueck to 48712 Gescher.
The short vertical antenna ontop of the car is good at low elevation, so some early problems with onchannel AM interference. The AM carrier was often visible, probably from Spain.

dk8cb
14-11-2005, 23:38
Hi,

on-channel carriers were strong (with the signal from Valencia perfectly nulled) and there were a lot of fading periods causing many dropouts.
Local interference level was low.

Roland

simone
15-11-2005, 06:20
Hi all,
strong and stable signal (except the first 10min), perfect results, see attachment
But seems to be the wrong datastream at the start this morning (RTHK)!
Simone

dk8cb
15-11-2005, 23:15
Hi,

there were some problems with a long impulse response tonight. Local interference level was low and I have no idea what caused the sudden improvement in reception that can be seen in my log.

Roland

simone
16-11-2005, 06:18
Hi all,
great conditions last night, nearly perfect results, see attachment
Simone

FritzWue
16-11-2005, 20:55
Driving home from near 58507 Lüdenscheid to 48712 Gescher.
Good results tonight:

carknue
16-11-2005, 21:35
Not really usefull results.

dk8cb
16-11-2005, 22:49
Hi,

it seems as if winter conditions are looming. Here is a screenshot showing the slowly lengthening impulse response as monitored here in Munich today.

dk8cb
17-11-2005, 00:14
A number of dropouts during which the impulse response looked worse than it did in my post above.

Roland

simone
17-11-2005, 06:17
Hi all,
perfect in my location, 100% correctly decoded audio for 6 hours, no problems with the IR, also the signal from Valencia seems to be weaker than in the past, see attachment
Simone

dk8cb
18-11-2005, 01:14
Hi,

I was so busy with other things that I forgot to switch DRM on, so here is only an 18 minute report. Perfect reception during that time.

Roland

simone
18-11-2005, 06:21
Hi all,
pretty good conditions again last night, nearly perfect results, see attachment
Simone

FritzWue
18-11-2005, 18:19
Driving from the outskirts of Mainz to near Duesseldorf.
Problems with AM interference. I saw the first carrier ontop of the signal north of Wiesbaden at 15:30 local time in the afternoon.

dk8cb
19-11-2005, 09:15
In general, signal strength was good but there were also periods with fade-outs and both on-channel and local interference causing dropouts.

Roland

simone
19-11-2005, 10:25
Hi all,
good results last night with a few minor dropouts, see attachment
Simone

simone
19-11-2005, 10:26
... and a strong and stable signal for 5 hours this morning
Simone

FritzWue
19-11-2005, 21:43
At my location besides 177kHz this is my DRM audio quality reference.
It's only mono, but it sounds good.

dk8cb
19-11-2005, 23:03
Quite good to listen to tonight.

Roland

simone
20-11-2005, 07:51
Hi all,
great results again last night, see attachment
Simone

Andreas
20-11-2005, 20:14
High but not at all stable SNR. I wonder why. Seems not only to be the usual sensitivity of medium wave to local noise.

As I can see a carrier in the center of the input spectrum and also it is getting the later the worse I guess it is on-channel interference to blame, coming from the east (?)

dk8cb
20-11-2005, 23:54
Originally posted by Andreas
I guess it is on-channel interference to blame, coming from the east (?)

Here (http://www.drmrx.org/forum/attachment.php?&postid=19167) again the link to the map showing the geographical locations of other on-channel stations and their daytime coverage assuming non-directional transmitting antennas.

Roland

dk8cb
21-11-2005, 00:00
Some dropouts but also quite good periods when it was fun to listen, especially with the kind of audio quality that can now be enjoyed on BBC transmissions.

Roland

FritzWue
21-11-2005, 13:27
Quite good, but here also problems with A.M. signals.
The analyzer screenshot was taken at 07:25 UTC.

simone
21-11-2005, 16:22
Hi all,
some minor dropouts when interferers were quite strong last night, not really a problem for listening, good audio quality
Simone

dk8cb
21-11-2005, 23:07
A strong signal but a few moments when my local interference took advantage of fading causing short dropouts. Nevertheless quite good to listen to.

Roland

simone
22-11-2005, 06:05
Hi all,
quite good again last night, 3 dropouts at times of deep fading, perfect from 1920, see attachment
Simone

FritzWue
22-11-2005, 07:29
Sad but true: At 07:00 local time 177kHz and 1296kHz are the only readable DRM signals at my location, even the 75m telefone doesn't work.
The slow transition from night to daytime conditions with strong echoes that merge over time:

FritzWue
22-11-2005, 17:11
Driving from west of 49808 Lingen (Ems) to 48712 Gescher.
Little problem half way with a.m. carrier ontop.

dk8cb
22-11-2005, 23:03
Despite a few dropouts and a high local noise level, it was quite ok to listen.

Roland

simone
23-11-2005, 07:49
Hi all,
pretty good conditions again last night,see attachment

Here is the EPG (http://www.stoepplernet.de/drm/BBC_WS_EPG/index.html) information that could be decoded from the MMservice, containing programming information for the next 12 days plus BBC logos etc., it took about 2min to receive each xml file, so nearly half an hour to get all the information. And here (http://www.stoepplernet.de/drm/BBC_WS_EPG/EPG_1296.png) is a screenshot when the EPG is displayed correctly (example for Dec 1st), and thatīs behind more (http://www.stoepplernet.de/drm/BBC_WS_EPG/sportsworld.png) .
Simone

FritzWue
23-11-2005, 20:27
Driving from near Duesseldorf to 48712 Gescher.
Problems with AM right ontop of the signal sometimes.

dk8cb
24-11-2005, 00:32
I only listened for a short period but apart from one dropout, reception was quite good then.

Roland

simone
24-11-2005, 06:40
Hi all,
great results last night, see attachment
Simone

simone
25-11-2005, 12:01
Hi all,
perfect decoding last night, see attachment
Btw it seems there are a few bugs in the transmitted dataservice (EPG)
Simone

carknue
25-11-2005, 23:13
Not possible here to get a stable signal. Also spanish AM station is very strong sometimes. No pleasure to listen.

dk8cb
25-11-2005, 23:33
Too much fading and interference.

Roland

simone
26-11-2005, 15:17
Hi all,
a pretty strong signal from Orfordness last night (maybe the snow helped ;)), so not much trouble with the interferers, perfect decoding except one short dropout, see attachment
Simone

simone
26-11-2005, 15:20
... and also quite good results this morning, and the best alternative during the period when there were problems from Rampisham and Kvitsoy was using a lower bitrate.
Simone

dk8cb
27-11-2005, 01:06
Hi,

there were quite a number of dropouts during a certain period, reception became a lot better later. I turned the loop slightly once but I didn't take down the exact time, it probably coincides with the improvement in reception but the plot doesn't give the impression of a sudden change, perhaps it was just a result of propagation conditions.

Roland

simone
27-11-2005, 06:58
Hi all,
perfect decoding for 6 hours last night, although interferers were quite strong at times, see attachment.
Simone

midre
27-11-2005, 11:13
Hi DRMs,

first reception result on 1296 kHz for a long time.
Much better conditions as in my early DRM reception times...;-)

regards, Michael

dk8cb
28-11-2005, 01:36
A lot of interference from both local and distant sources.

Roland

dk8cb
28-11-2005, 23:09
A bit of local interference and fading. The latter seems to become more common the more we get into winter.

Roland

midre
28-11-2005, 23:21
Hi DRMs,

again good conditions on 1296 kHz.

regards, Michael

simone
29-11-2005, 16:08
Hi all,
nearly perfect last night, see attachment
Simone

dk8cb
29-11-2005, 19:56
Some fading and a strong on-channel carrier at times this morning.

Roland

FritzWue
29-11-2005, 21:53
Driving from near 35390 Giessen to 48712 Gescher via A45, A2, A31. The dropouts were caused by fading plus AM interference.

carknue
29-11-2005, 23:09
Not good.

dk8cb
29-11-2005, 23:49
Hi,

signal faded out deeply quite often and interference took over in those moments.

Roland

simone
30-11-2005, 06:24
Hi all,
nearly perfect results again last night, see attachment
Simone

FritzWue
30-11-2005, 19:37
Driving from 48301 Nottuln to 48712 Gescher.
Good results tonight.

carknue
30-11-2005, 23:03
Not good.

dk8cb
30-11-2005, 23:26
Quite good during the last 40 minutes.

Roland

FritzWue
19-12-2005, 19:38
Drving from from near Cloppenburg via A31 and A28 to Oldenburg.
The first dropout was a static rainshower, the second was in the river Ems tunnel.

FritzWue
19-12-2005, 19:39
Driving down the A31 from near Meppen to 48712 Gescher.

df8uo
19-12-2005, 20:48
Hi all,
attached the result with a small active loop antenna indoor.
73, Daniel

dk8cb
19-12-2005, 23:41
Fading and both local and distant interference caused a not so good result.

Roland

dk8cb
19-12-2005, 23:44
Strong local interference combined with a sometimes weak signal produced a result that was not nice, see screenshot.

Roland

dk8cb
19-12-2005, 23:45
There was a break in transmission at 22:58 UTC, see screenshot.

Roland

dk8cb
19-12-2005, 23:47
The later, the better.

Roland

simone
20-12-2005, 16:33
Hi all,
results for the past two nights, some Tx related dropouts that occur regularly since last Monday, see attachment
Simone

dk8cb
20-12-2005, 23:06
There was a break in transmission at 22:14 UTC.

Roland

simone
21-12-2005, 07:45
Hi all,
good results, Tx problems see attachment
Simone

simone
22-12-2005, 06:32
Hi all,
bad conditions and many dropouts at the beginning, better from 1850 (Tx problem 2003), see attachment
Simone

dk8cb
22-12-2005, 12:00
Reception could have been better.

Roland

FritzWue
22-12-2005, 20:11
Driving home from Duisburg to 48712 Gescher.
Not good tonight, AM carrier visible ontop all the time.

dk8cb
22-12-2005, 23:04
A few moments of fading and a break in transmission at 22:07 UTC. Quite a good and solid signal during the rest of the time.

Roland

simone
23-12-2005, 07:23
Hi all,
some dropouts during a period of deep fading (1815- 1945), quite good for the rest of the time, also 2 interruptions, see attachment
Simone

simone
24-12-2005, 05:55
Hi all,
again some dropouts due to deep fading,
also an interruption at 1909 and another Tx problem at 2210 which caused an error with Dream and I had to restart it.
Simone

dk8cb
24-12-2005, 08:11
I have seen days with better reception and less local interference and fading.

Roland

dk8cb
24-12-2005, 09:37
Good at the beginning of my logging period this morning but signal became too weak after some time.

Roland

simone
24-12-2005, 14:43
Hi all,
not too bad until 0805 this morning, Tx problem occured twice, see attachment
Simone

simone
25-12-2005, 07:25
Hi all,
quite good results until 2100, later some dropouts due to strong interferers, the Tx porblem occured twice
Simone

dk8cb
25-12-2005, 23:05
Too much local interference and fading. Listening to music from J.S.Bach during "Concert Hour" was nevertheless enjoyable, even with a few dropouts.

Roland

simone
26-12-2005, 05:09
Hi all,
better conditions than the past days, only a few short dropouts (3 were Tx related) during my 7hours log, see attachment
Simone

dk8cb
26-12-2005, 23:07
Not good over here.

Roland

simone
27-12-2005, 06:35
Hi all,
a few dropouts but quite good most of the time, see attachment
Simone

dk8cb
27-12-2005, 23:06
Reception improved a bit after my neighbour had switched his interference sources off.

Roland

simone
28-12-2005, 07:10
Hi all,
a few dropouts last night (at least 1 was Tx related), see attachment
Btw there is still a SDC problem, although I can receive AFīs, EPG etc. OK.
Simone

simone
29-12-2005, 06:34
Hi all,
quite good most of the time, see attachment
Simone

dk8cb
29-12-2005, 09:26
A typical winter result for my location.

Roland

dk8cb
30-12-2005, 00:45
I was only able to tune in for the last 25 minutes.

Roland

simone
30-12-2005, 07:20
Hi all,
quite good results from 1830, Tx problem occured 2*, see attachment
Simone

dk8cb
30-12-2005, 23:35
Not bad until Dream suddenly showed a much lower SNR than the DRMSW. I then stopped Dream and tried a resync but to no avail.

Roland

dk8cb
30-12-2005, 23:39
I restarted Dream a while after the decoding result had become bad and I also did a comparison with the DRMSW. Interestingly and quite different from normally observed behaviour, the DRMSW produced chunks of audio data consisting of single words or syllables during times when Dream produced no audio at all. Dream's SNR was also significantly lower, see screenshot.

Roland

simone
31-12-2005, 05:26
Hi all,
no surprise about the results last night, as tests back in August this year had already shown that mode A works much better than mode B on this transmission. Interesting to see that the current Tx problem also occured with this datastream.
Btw yesterday the transmission had started with the regular datastream in the morning, donīt know when it was changed.
Hopefully they will be back using the normal datastream soon (currently it is still using mode B).
Simone

simone
31-12-2005, 14:22
Hi all,
many dropouts this morning, this mode is not robust enough for this transmission even with a strong signal in my location, see attachment
(btw Tx problem at 0614)
Simone

dk8cb
31-12-2005, 14:52
Originally posted by simone
... this mode is not robust enough for this transmission even with a strong signal in my location

I also noticed yesterday that the decoding result was influenced a lot more by on-channel signals than it usually is when mode A is being used. With mode A, an on-channel carrier that is 20 dB stronger does not necessarily cause a dropout. With mode B however, even a 10 dB stronger carrier often caused an audio dropout.

Roland

simone
01-01-2006, 08:00
Hi all,
many dropouts last night (at least 1 was Tx related), still using mode B, required SNR is too high with the current configuration for my location, see attachment
Happy New Year
Simone

simone
01-01-2006, 19:11
Hi all,
conditions improved after the first 1.5 hours this morning, still not using the normal configuration, see attachment
Simone

dk8cb
02-01-2006, 00:09
A rather bad result. Signal gained strength during the course of transmission.

Roland

simone
02-01-2006, 06:16
Hi all,
conditions improved a lot from 2130, so quite good results then despite mode B is still being used, Tx problem occured 2*, see attachment
Simone

dk8cb
02-01-2006, 23:09
Today, the signal was much better than it was on the past few days, there was no local interference and on-channel signals were weaker than they usually are in winter.
But even under such improved conditions, mode B did not work very well.

Roland

simone
03-01-2006, 06:50
Hi all,
pretty good conditions last night, great results although it was still mode B, see attachment
Simone

dk8cb
03-01-2006, 23:39
One of the strangest results I ever got on this frequency.

I have no explanation whatsoever for the sudden improvement but I know that local interference did not seem to be involved.

At 21:10 UTC, Dreams MSC CRC indicator turned grey for a moment.

Roland

simone
04-01-2006, 16:16
Hi all,
nearly perfect results using mode A again, just two Tx related dropouts, see attachment
Simone

FritzWue
04-01-2006, 21:08
Driving from Dortmund via B1, A45, A2, A31 to 48712 Gescher.
One interruption in the Gelsenkirchen A2 tunnel.
Good reception for the rest of the time!

dk8cb
05-01-2006, 00:34
Quite a good result today. I was only able to listen for about the last 45 minutes.

Roland

simone
05-01-2006, 06:39
Hi all,
quite good again last night, see attachment
Btw text messages were not working and old data in the EPG. (The text message on HF is always the same since a couple of days)).

simone
06-01-2006, 06:07
Hi all,
nearly perfect results (apart from 2 Tx related sync losses), also text messages and EPG were working again
Simone

FritzWue
06-01-2006, 06:59
Driving from near Bottrop to Cologne via A31, A2, A3:

FritzWue
06-01-2006, 07:11
Diving from near Leverkusen to 48712 Gescher via A3, A2, A31.
Max. SNR missing as the notebook shut down with empty battery.

dk8cb
06-01-2006, 12:44
Quite good initially but more and more dropouts later.

Roland

dk8cb
06-01-2006, 23:03
The dropouts in my report look more annoying than they really were since there were quite long periods of good reception in between.

Roland

simone
07-01-2006, 07:06
Hi all,
good results last night, see attachment
Simone

dk8cb
07-01-2006, 23:04
Hi,

I have seen much worse results during winter. The dropouts resulted from fading. During the rest of the time, the signal was quite strong, especially during the last hour when on-channel interference was often only visible in Dream's WMER plot.

Roland

simone
08-01-2006, 05:19
Hi all,
quite good again last night, see attachment
Simone

dk8cb
08-01-2006, 23:01
Signal was strong and even the local interference from my neighbour's lighting power supplies did not influence the decoding result significantly.

Roland

simone
09-01-2006, 07:38
Hi all,
a weak signal at the beginning, quite good from 1720, see attachment
Simone

dk8cb
09-01-2006, 23:21
A sometimes a bit longer impulse response as well as local and distant interference caused a shaky result.

Roland

simone
10-01-2006, 08:08
Hi all,
great results last night, the few dropouts in the last half hour were probably a local problem (too much multitasking ;)).
Simone

simone
10-01-2006, 16:31
Hi all,
good results also for more than 4 hours this morning, see attachment
Simone

FritzWue
10-01-2006, 18:32
Driving from Minden to 48712 Gescher via A30, A31.
Sometimes problems with AM carrier ontop.

dk8cb
10-01-2006, 23:00
Great reception tonight!

Roland

simone
11-01-2006, 06:20
Hi all,
a weak signal in the first minutes, perfect from 1930, see attachment
Simone

simone
11-01-2006, 17:35
Hi all,
thatīs what the AF service looks like on the BBC WS.
Simone

dk8cb
11-01-2006, 23:14
Again a night with excellent reception.

Roland

simone
12-01-2006, 05:59
Hi all,
great results last night, see attachment
Simone

dk8cb
12-01-2006, 16:36
Originally posted by simone thatīs what the AF service looks like on the BBC WS.


I wonder why the BBC advertises 9470 kHz as running until 15:00 UTC when in reality, it always stops transmitting at 14:28 UTC for quite some time now. :confused:

Roland

hsseppo
12-01-2006, 20:05
Hi all,

perfect today in Helsinki. 49 minutes, 99.98%

Seppo

simone
13-01-2006, 06:21
Hi all,
a few dropouts with a weak signal at the beginning, then signal got stronger,
btw the error in the AF data mentioned above has already been corrected.
@Klaus: There is still an error in the drm-dx.de schedule
Simone

dk8cb
13-01-2006, 09:26
Originally posted by simone
btw the error in the AF data mentioned above has already been corrected.

That was my intention when I posted it here. :)

But why is the end shown as 14:30 UTC when it is always 14:28 UTC?

Roland

dk8cb
13-01-2006, 11:49
A bit shaky last night with a lot of interference and a very bumpy spectrum.

Roland

hsseppo
13-01-2006, 20:39
Hi,

93%, 211 minutes.

73, Seppo

dk8cb
13-01-2006, 23:11
What a catastrophic result today!

Roland

simone
14-01-2006, 08:04
Hi all,
good conditions when I started the logfile, later signal was weaker and interferers were quite strong, but still good results with this mode.
Simone

dk8cb
14-01-2006, 23:04
Hi,

not really good but a lot better than yesterday. Quite good for listening during the last one and a half hour.

Roland

simone
15-01-2006, 14:18
Hi all,
good results even at times of a weaker signal last night, see attachment
Simone

simone
15-01-2006, 14:20
... and also pretty good results during the first 4 hours this morning, ecxept a short period around 0800, see attachment
Simone

dk8cb
15-01-2006, 23:02
The later, the better.

Signal was sometimes weak and interference was often a lot stronger than the DRM signal. Quite a strong signal towards the end however.

Roland

simone
16-01-2006, 07:35
Hi all,
only a few dropouts caused by a weaker signal from 1730- 1945, quite good results last night
Simone

dk8cb
17-01-2006, 00:45
Not bad during the last hour.

Roland

simone
17-01-2006, 07:08
Hi all,
only a few dropouts last night, see attachment
Simone

simone
17-01-2006, 16:08
... and great results early this morning
Simone

FritzWue
17-01-2006, 21:42
Driving home from Ahlen to 48712 Gescher via Muenster.
Good results with some problems when stopping at the fuel station and the restaurant.

dk8cb
17-01-2006, 23:20
A few dropouts. Local and distant interference was strong.

Roland

simone
18-01-2006, 10:21
Hi all,
good results last night, a few dropouts at the beginning, perfect from 1930, see attachment
Simone

simone
18-01-2006, 10:22
... also pretty good from 0600- 0800 this morning
Simone

FritzWue
18-01-2006, 21:20
Driving from 48712 Gescher to Mannheim via A31, A2, A3, A67 at daytime: :cool:

FritzWue
18-01-2006, 21:22
Driving from Mannheim to 48712 Gescher via A67, A3, A2, A31:

dk8cb
18-01-2006, 23:01
Quite ok.

Roland

simone
19-01-2006, 05:46
Hi all,
pretty good last night, see attachment
Simone

simone
19-01-2006, 15:02
Hi all,
perfect results for 4 hours this morning, see attachment
Simone

FritzWue
19-01-2006, 17:44
Driving on the A31 from 46244 Kirchhellen to 48712 Gescher:

simone
20-01-2006, 05:44
Hi all,
excellent results last night, see attachment
Simone

dk8cb
20-01-2006, 09:43
Just a 15 minutes report.

Roland

simone
20-01-2006, 13:21
Hi all,
good results until 0830 this morning
Simone

simone
21-01-2006, 05:13
Hi all,
good conditions last night, no problems during my listening period, but transmission did not stop as scheduled, it was on all night.
Simone
edit: Sorry, I guess I was wrong assuming transmission did not stop as scheduled.

simone
21-01-2006, 09:47
... and also great results for 4 hours this morning, see attachment
Simone

dk8cb
21-01-2006, 10:51
Hi,

strong local interference and fading on Orfordness' signal caused a not so good result.

Contrary to Simone's statement, I registered a regular end of transmission at the usual time, see screenshot.

Roland

carknue
21-01-2006, 22:33
No pleasure to listen, as usual for me. Signal collapses quite often and then there is the strong spanish station.

dk8cb
21-01-2006, 23:15
Hi,

good periods with pleasant listening but also a period with fading.

Roland

simone
22-01-2006, 10:41
Hi all,
perfect results from 1630- 2300 last night, see attachment
Simone

simone
22-01-2006, 10:43
... and great results this morning for nearly 4 hours
Simone

dk8cb
22-01-2006, 23:05
Hi,

today, there were good periods and bad periods with deep fading.

Roland

simone
23-01-2006, 07:48
Hi all,
quite good again last night, see attachment
Simone

hsseppo
23-01-2006, 20:29
Hi all,

rather good in Helsinki. 94% 295 minutes.

Seppo

FritzWue
23-01-2006, 22:26
Driving home from near Duesseldorf to 48712 Gescher via A3, A2, A31.
Listening to the BBC with 21.6kbps on mediumwave is a real relief after spending some time with the bad audio from Taldom on 49m.

dk8cb
23-01-2006, 23:27
Quite a steady signal and a rather good result today.

Roland

simone
24-01-2006, 06:30
Hi all,
nearly perfect last night, see attachment
Simone

FritzWue
24-01-2006, 18:29
Driving home from near Osnabrueck to 48712 Gescher via A30, A31.
Another perfect result on 1296 kHz! DRM is real fun this way!

dk8cb
24-01-2006, 23:37
Excellent reception despite a high local noise level.

Roland

dk8cb
25-01-2006, 23:55
Rather good tonight.

Roland

dk8cb
26-01-2006, 23:13
not a good result tonight. There were periods with weak signal.

Roland

carknue
27-01-2006, 22:05
No success with this frequency.

dk8cb
27-01-2006, 23:10
Quite ok today.

Roland

dk8cb
28-01-2006, 23:03
"Only" 98.9% today but very good over long periods and very pleasant listening.

Roland

dk8cb
29-01-2006, 23:15
Quite a number of dropouts today but also very pleasant listening during 'International Recital' with excellent audio quality.

Roland

dk8cb
30-01-2006, 23:03
Hi,

one large dropout during fading but quite good for the rest of the time.

Roland

dk8cb
31-01-2006, 23:11
Not so good tonight.

Roland

dk8cb
01-02-2006, 23:21
Perfect throughout!

Roland

dk8cb
02-02-2006, 23:39
Just one dropout due to fading.

Roland

dk8cb
04-02-2006, 00:32
Not a good result today. When I tuned in, signal was weak, interference from distant stations was strong and the impulse response didn't look good either.

Signal improved a bit later but the overall result was not a good one.

Roland

FritzWue
04-02-2006, 00:56
Good results this afternoon and in the early evening here:

simone
04-02-2006, 11:46
Hi all,
very good conditions last week, all nights better than 99.9% correctly decoded audio (1700- 2300 UTC), no Tx problems, again quite good last night, see attachment
Simone

FritzWue
04-02-2006, 21:33
Just a few minutes tonight, brilliant signal:

dk8cb
04-02-2006, 23:02
A few dropouts but also good over long periods.

Roland

carknue
04-02-2006, 23:11
Good listening.