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Old 22-11-2014, 16:56   #121
Linux-DRM
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AFS

Quote:
Originally Posted by Digger
My DR111 has now become stable again, it has stopped playing pranks like changing pre-set channels, but I discovered another thing: The wake-up timer is unreliable. If I set the DR111 in the evening to wake up at 6 UTC the next morning it seems like it doesn't start. Oversleep guaranteed!

Today in the morning I set it to start at 1100 UTC to log KBS from WOF. I had set the sleep timer to 30 minutes and activated it. The DR111 did start (wow!) and I got 28 logs of nothing. The AFS on Woofferton made the DR111 look for alternative frequencies all the time. The 28th log from 1131 UTC became 62 minutes long after I manually switched off the radio. No AFS and the DR111 stayed calm. No stress anymore, but on the other hand, no signal left to decode.

By the way, these wake-up problems I found when I used my oldest DR111. Last night I dug out my second DR111 only to find the same problem. Perhaps one should try to load an older firmware? Who knows...

Regarding the AFS, in theory it sounds great but the reality is it's a pain in the rear end, although trying to do the honourable thing by tuning to an alternative frequency (which is more often than not worse than the freq you're on. I remember when I had my Starwaves Truckbox/Carbox in the car when DW/BBC were on DRM for most of the day and the AFS would kick in as soon as the signal was lost for a few seconds. In the end I disabled AFS. Not sure if the DR111 has the capability to disable AFS or not though.
I have experienced similar problems using 'AF' on RDS trying to tune on FM when there is only ever one frequency being transmitted (except for national stations, which I must admit is quite handy ).

Disable AFS if at all possible, is my recommendation.
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Radios: MR 27024, 2 x Tecsun PL-660, Eton G3 & E5, Tecsun PL-365
Antenna: Homebrew Magnetic Loop (3-30MHz)
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Old 22-11-2014, 18:13   #122
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Quote:
Originally Posted by Linux-DRM
Not sure if the DR111 has the capability to disable AFS or not though.
... using 'AF' on RDS trying to tune on FM when there is only ever one frequency being transmitted (except for national stations, which I must admit is quite handy ).

Disable AFS if at all possible, is my recommendation.

If you set the DR111 to "expert mode", then it stays on the frequency.

The AF on RDS works fine. I have tested it on trips from Switzerland to Sweden and you stay on the same programme (as long as it is broadcast nationwide).

If I try to use the DR111 "wake-up" function, unfortunately there is no way of getting it into the "expert mode".

If Woofferton reads this, perhaps he would disable the AFS on NHK and KBS, as there are no alternative frequencies...
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Last edited by Digger : 22-11-2014 at 18:15.
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Old 22-11-2014, 23:00   #123
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Quote:
Originally Posted by Digger
The AF on RDS works fine. I have tested it on trips from Switzerland to Sweden and you stay on the same programme (as long as it is broadcast nationwide).

If Woofferton reads this, perhaps he would disable the AFS on NHK and KBS, as there are no alternative frequencies...

Yes, national radio stations are fine with RDS, it's the local stations (here at least) that do not have an alternate frequency that sends it spinning round until it realises there is none. Why they didn't include a flag in the broadcast saying, 'don't bother looking' I will never know
Maybe they did? but is badly implemented on the radios I have used.

Yes, a broadcaster having AFS enabled on a single frequency broadcast is down right daft.
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Old 23-11-2014, 05:44   #124
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Alternative Frequency Selection

I believe that the problem with Alternative Frequency Selection at Woofferton is not limited to 9760 kHz, but also to their 3955 kHz transmission too!
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Old 23-11-2014, 08:07   #125
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The DR111 did not "wake up" this morning to log RRI...
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Old 25-11-2014, 08:45   #126
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No wake-up timer function

Even my second DR111 doesn't bother to wake up and log 3955 kHz in the mornings... Last night I set the DR111 to wake up at 0600 UTC, set to "ON", and the sleep timer was set to 60 minutes. The pre-set channel was DRM 1-2, 3955 kHz.

This morning there was no log and when I switched on the radio manually it was on DRM 1-2 but the frequency read 9780 kHz... I pressed the DRM 1-2 again and the frequency changed to 3955 kHz. Peculiar.

I wonder if this radio has a back-up battery in it? I pulled the plug for 10 minutes and when I pressed SET after reconnecting the power supply the calendar says "2155-10-01" and the time was 10:00 (should have been 09:41).

I would like to live and to hear what the DR111 can receive on the 1st October 2155...
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Old 30-11-2014, 14:32   #127
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Play .rec files with DR111 or DReaM

Quote:
Originally Posted by G0SVN
Does anyone know how to playback REC files on a PC?

@Neil:

http://www.hobbyradio.se/en/drm/drmplayback_en.html#bbc

Or, according to Newstar:

To playback the recording, press DRM key until you come to a new group
which is right after DRM-1, DRM-2 ,DRM-3, we call it "DRM Playback Group",
playback will start automatically when SD card is inserted, use |<< and >>|
key to switch between previous and next recording file, and INFO key to
show file information. A leading letter [P] indicates the playback status
which helps distinguishing from normal DRM reception.

Hint: The recording file *.rec on the SD card can also be playback on PC,
all service information a kept. To do this, create a shortcut pointing to
your dream.exe, and add "--rsiin" to the end of the command line, then
simply drag and drop the *.rec file to the shortcut icon, Windows will automatically call dream.exe and start playback
Attached Images
File Type: jpg images3.jpg (58.0 KB, 132 views)
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Last edited by Digger : 30-11-2014 at 14:36.
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Old 18-12-2014, 20:49   #128
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Perhaps a bit far-fetched, but it is possible to pick up the 12 kHz IF in the DR111 and feed it to a PC with Dream installed. Or SoDiRa if you prefer.
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