Am 24.07.2013 16:06, schrieb Antti Palosaari:
Could you test attached patch?
It enhances reception a little bit, you should be able to receive more
weak signals.
I was able to made test setup against modulator. Modulator + attenuator
+ attenuator + TV-stick, where I got picture using Windows driver at
signal level -29dBm whilst on Linux -26.5dBm was needed. With that patch
Linux driver started performing same as Windows.
regards
Antti
Hello,
unfortunately your patch doesn't bring any change: I rebuild the kernel
with it but the driver still gives no signal on the two higher frequencies.
For safety I tried the channel.conf with windows and vlc and everything
worked as it should.
Thanks,
jan
# kernel 3.8.0-26-patched1 - output of: tzap -c channels.conf -t 10 MDR
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
tuning to 538000000 Hz
video pid 0x0611, audio pid 0x0612
status 00 | signal 0000 | snr 0000 | ber 0000ffff | unc b7768b48 |
status 1f | signal bfa0 | snr 0102 | ber 00000000 | unc 00000000 |
FE_HAS_LOCK
status 1f | signal bfa0 | snr 0104 | ber 00000000 | unc 00000000 |
FE_HAS_LOCK
status 1f | signal bfa0 | snr 0102 | ber 00000000 | unc 00000000 |
FE_HAS_LOCK
status 1f | signal bfa0 | snr 00fb | ber 00000000 | unc 00000000 |
FE_HAS_LOCK
status 1f | signal bfa0 | snr 00fd | ber 00000000 | unc 00000000 |
FE_HAS_LOCK
status 1f | signal bfa0 | snr 0103 | ber 00000000 | unc 00000000 |
FE_HAS_LOCK
status 1f | signal bfa0 | snr 00ff | ber 00000000 | unc 00000000 |
FE_HAS_LOCK
status 1f | signal bfa0 | snr 00f9 | ber 00000000 | unc 00000000 |
FE_HAS_LOCK
status 1f | signal bfa0 | snr 00fa | ber 00000000 | unc 00000000 |
FE_HAS_LOCK
status 1f | signal bfa0 | snr 00f7 | ber 00000000 | unc 00000000 |
FE_HAS_LOCK
reading channels from file 'channels.conf'
# kernel 3.8.0-26-patched1 - output of: 'dvbsnoop -s feinfo' while
watching MDR [shortened]
Current parameters:
Frequency: 538000.000 kHz
Inversion: OFF
Bandwidth: 8 MHz
Stream code rate (hi prio): FEC 2/3
Stream code rate (lo prio): FEC 1/2
Modulation: QAM 64
Transmission mode: 8k mode
Guard interval: 1/4
Hierarchy: none
# kernel 3.8.0-26-patched1 - output of: tzap -c channels.conf -t 10 ZDF
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
tuning to 594000000 Hz
video pid 0x0221, audio pid 0x0222
status 00 | signal 0000 | snr 0000 | ber 0000ffff | unc b7718b48 |
status 00 | signal bfca | snr 0000 | ber 0000ffff | unc 00000000 |
status 00 | signal bfca | snr 0000 | ber 0000ffff | unc 00000000 |
status 00 | signal bfca | snr 0000 | ber 0000ffff | unc 00000000 |
status 00 | signal bfca | snr 0000 | ber 0000ffff | unc 00000000 |
status 00 | signal bfca | snr 0000 | ber 0000ffff | unc 00000000 |
status 00 | signal bfca | snr 0000 | ber 0000ffff | unc 00000000 |
status 00 | signal bfca | snr 0000 | ber 0000ffff | unc 00000000 |
status 00 | signal bfca | snr 0000 | ber 0000ffff | unc 00000000 |
status 00 | signal bfca | snr 0000 | ber 0000ffff | unc 00000000 |
reading channels from file 'channels.conf'
# kernel 3.8.0-26-patched1 - output of: 'dvbsnoop -s feinfo' while
watching ZDF [shortened]
Current parameters:
Frequency: 594000.000 kHz
Inversion: AUTO
Bandwidth: 8 MHz
Stream code rate (hi prio): FEC 1/2
Stream code rate (lo prio): FEC 1/2
Modulation: QPSK
Transmission mode: 2k mode
Guard interval: 1/32
Hierarchy: none
# kernel 3.8.0-26-patched1 - output of: tzap -c channels.conf -t 10 ARD
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
tuning to 618000000 Hz
video pid 0x0601, audio pid 0x0602
status 00 | signal 0000 | snr 0000 | ber 0000ffff | unc b7767b48 |
status 00 | signal bf93 | snr 0000 | ber 0000ffff | unc 00000000 |
status 00 | signal bf93 | snr 0000 | ber 0000ffff | unc 00000000 |
status 00 | signal bf93 | snr 0000 | ber 0000ffff | unc 00000000 |
status 00 | signal bf93 | snr 0000 | ber 0000ffff | unc 00000000 |
status 00 | signal bf93 | snr 0000 | ber 0000ffff | unc 00000000 |
status 00 | signal bf93 | snr 007f | ber 00004ca0 | unc 00000000 |
status 00 | signal bf93 | snr 0000 | ber 0000ffff | unc 00000000 |
status 00 | signal bf93 | snr 0000 | ber 0000ffff | unc 00000000 |
status 00 | signal bf93 | snr 0000 | ber 0000ffff | unc 00000000 |
reading channels from file 'channels.conf'
# kernel 3.8.0-26-patched1 - output of: 'dvbsnoop -s feinfo' while
watching ARD [shortened]
Current parameters:
Frequency: 618000.000 kHz
Inversion: AUTO
Bandwidth: 8 MHz
Stream code rate (hi prio): FEC 1/2
Stream code rate (lo prio): FEC 1/2
Modulation: QPSK
Transmission mode: 2k mode
Guard interval: 1/32
Hierarchy: none
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