[vdr] Re: Switching to RTL-transponder causes black screen

[christian.glass@t-online.de (Christian Glass)]

> > I am using VDR 1.2.2 with DVB-driver as of 01.08.2003.
> > When directly (with a number key) switching to one of the TV-stations
> > residing on transponder 12188 H 27500, which I call the
"RTL-transponder",
> > VDR produces a blank black screen an no audio. EPG's short messages
still
> > appear!
> > If I switch to channel "Super RTL" I get the channel "LCP" from the
> > transponder 12207 V 27500 with no audio instead.
> > Switching a little further, e.g. to "Pro 7" causes all channels to work
> > properly again.
> > Often this faulty behaviour causes VDR becoming unstable and animates
the
> > watchdog to restarting VDR in a loop.
> > I can't pinpoint the side effects causing this. Did anyone encounter
similar
> > problems?
> Can you try switching channels with the szap utility that comes with the
> driver?

I did that. Here are the results:

I Zapped ARD --> RTL2 --> ARD --> Super RTL
##################################
linux:/dvb/apps/szap # szap "ARD"  -a1 -c /video/channels.conf
reading channels from file '/video/channels.conf'
zapping to 'ARD':
sat 0, frequency = 11837 MHz V, symbolrate 27500000, vpid = 0x0065, apid =
0x0066
using '/dev/dvb/adapter1/frontend0' and '/dev/dvb/adapter1/demux0'
status 03 | signal b0a9 | snr addc | ber 00002a05 | unc 00000000 |
status 1f | signal af05 | snr bcdf | ber 00007500 | unc 00000000 |
FE_HAS_LOCK

linux:/dvb/apps/szap # szap "RTL 2"  -a1 -c /video/channels.conf
reading channels from file '/video/channels.conf'
zapping to 'RTL 2':
sat 0, frequency = 12188 MHz H, symbolrate 27500000, vpid = 0x00a6, apid =
0x0080
using '/dev/dvb/adapter1/frontend0' and '/dev/dvb/adapter1/demux0'
status 03 | signal 3946 | snr 7047 | ber 00001100 | unc 00000000 |
status 03 | signal 2cf6 | snr 702c | ber 00000000 | unc 00000000 |
status 03 | signal 282b | snr 706e | ber 00000000 | unc 00000000 |
status 03 | signal 4bbe | snr 7905 | ber 00000000 | unc 00000000 |
status 01 | signal 7df5 | snr ab84 | ber 0000ff08 | unc 00000000 |
status 1f | signal a5cf | snr b43f | ber 0000ad00 | unc 00000000 |
FE_HAS_LOCK
status 1f | signal a55d | snr b400 | ber 00000000 | unc 00000000 |
FE_HAS_LOCK

linux:/dvb/apps/szap # szap "ARD"  -a1 -c /video/channels.conf
reading channels from file '/video/channels.conf'
zapping to 'ARD':
sat 0, frequency = 11837 MHz V, symbolrate 27500000, vpid = 0x0065, apid =
0x0066
using '/dev/dvb/adapter1/frontend0' and '/dev/dvb/adapter1/demux0'
status 03 | signal b0ff | snr ab09 | ber 0000ff10 | unc 00000000 |
status 1f | signal af02 | snr bc91 | ber 0000ff00 | unc 00000000 |
FE_HAS_LOCK

linux:/dvb/apps/szap # szap "Super RTL"  -a1 -c /video/channels.conf
reading channels from file '/video/channels.conf'
zapping to 'Super RTL':
sat 0, frequency = 12188 MHz H, symbolrate 27500000, vpid = 0x00a5, apid =
0x0078
using '/dev/dvb/adapter1/frontend0' and '/dev/dvb/adapter1/demux0'
status 03 | signal 38ef | snr 701d | ber 0000fc00 | unc 00000000 |
status 03 | signal 2bc6 | snr 7035 | ber 00000000 | unc 00000000 |
status 03 | signal 2801 | snr 70aa | ber 00000000 | unc 00000000 |
status 01 | signal 616d | snr 7c4d | ber 00000000 | unc 00000000 |
status 03 | signal 8339 | snr af71 | ber 00000000 | unc 00000000 |
status 1f | signal a55c | snr b3fa | ber 00000000 | unc 00000000 |
FE_HAS_LOCK
status 1f | signal a5b9 | snr b427 | ber 00000000 | unc 00000000 |
FE_HAS_LOCK
status 1f | signal a5a3 | snr b436 | ber 00000000 | unc 00000000 |
FE_HAS_LOCK##################################

As you can see there are 5 "hops" with no "FE_HAS_LOCK" with RTL2 and Super
RTL.
The switching to RTL resulted in black screen, no audio.
The switching to Super RTL resulted in channel "LCP", no audio as described
above.

> Maybe there's a problem with switching polarization. Can you measure the
> voltage at the sat cable when switching between H and V channels?

I will check that and post the results here, again.



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