Difference between revisions of "PcHDTV"

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(Mini HOW-TOs)
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== Mini HOW-TOs ==
 
== Mini HOW-TOs ==
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'''How do I enable QAM support using the video4linux drivers instead of [[DVB]]'''?
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<blockquote>
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See this [http://www.xmission.com/~pchdtv/forum/viewtopic.php?t=543 post].
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</blockquote>
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'''How do I scan for QAM channels?'''
 
'''How do I scan for QAM channels?'''
 
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'''How do I know if a QAM channel is encrypted?'''
 
'''How do I know if a QAM channel is encrypted?'''
 
<blockquote>
 
<blockquote>
There does not seem to be a way to tell for certain. See this [http://www.linuxtv.org/pipermail/linux-dvb/2005-March/000460.html post] and this [http://www.linuxtv.org/pipermail/linux-dvb/2005-March/000557.html reply] (March, 2005). You can also go to this [http://www.avsforum.com site] , click on "HDTV" on the left hand side, then choose Local HDTV Info and Reception, then go to the thread index to find your local area. You should be able to find quite a bit of discussion from people with QAM tuners in their TVs or as separate tuners like the Samsung SIR-T4151 which will indicate if your local channels are in clear QAM or not.
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There does not seem to be a direct way to tell for certain. See this [http://www.linuxtv.org/pipermail/linux-dvb/2005-March/000460.html post] and this [http://www.linuxtv.org/pipermail/linux-dvb/2005-March/000557.html reply] (March, 2005). There is, however, an indirect way to find out which channels are encrypted. Visit the [http://www.avsforum.com/avs-vb/forumdisplay.php?s=&forumid=45 Local HDTV Info and Reception] on [http://www.avsforum.com AVS Forum]. Find the thread topic that corresponds to your local area. You should be able to find quite a bit of discussion from people with QAM tuners in their TVs or separate tuners like the Samsung SIR-T4151 which will indicate if your local channels are in clear QAM or not.
 
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Revision as of 01:41, 24 March 2005

A U.S. based DVB Card Vendor that produces ATSC HDTV PCI cards and claims explicitly that they are working under Linux.

FAQ

TODO...

Mini HOW-TOs

How do I enable QAM support using the video4linux drivers instead of DVB?

See this post.

How do I scan for QAM channels?

pcHDTV 3000 supports unencrypted QAM channels over cable. You must have the DVB module drivers (cx88_dvb) loaded to use QAM. [TODO add link to pcHDTV forums on DVB driver installation.] To scan for QAM channels:

1. Get the dvb-apps tools from cvs.

cvs -d :pserver:anonymous@linuxtv.org:/cvs/linuxtv login
cvs -d :pserver:anonymous@linuxtv.org:/cvs/linuxtv co dvb-apps

2. Read the dvbs-apps/INSTALL to compile and install.

3. Save this channel.conf to ~/.azap/channels.conf.

You should be able to scan for QAM channels using azap (part of the dvb-apps tools). Run 'azap [channel]' to scan for a specific channel. For example:

$ /usr/local/bin/azap c88
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
tuning to 609000000 Hz
video pid 0x0000, audio pid 0x0000
status 1f | signal f3f6 | snr fd27 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
status 1f | signal ef9c | snr fd2b | ber 00000000 | unc 00000000 | FE_HAS_LOCK
status 1f | signal f3f6 | snr fd29 | ber 00000000 | unc 00000000 | FE_HAS_LOCK

The FE_HAS_LOCK indicates a signal lock on channel c88. Cable channels typically begin at c80.

You can also use MythTV 0.17 to automagically scan for channels on your DVB card. Make sure you compile it with DVB support. MythTV 0.17 only enables QAM-256. See this thread for a patch that enables QAM-64.

How do I know if a QAM channel is encrypted?

There does not seem to be a direct way to tell for certain. See this post and this reply (March, 2005). There is, however, an indirect way to find out which channels are encrypted. Visit the Local HDTV Info and Reception on AVS Forum. Find the thread topic that corresponds to your local area. You should be able to find quite a bit of discussion from people with QAM tuners in their TVs or separate tuners like the Samsung SIR-T4151 which will indicate if your local channels are in clear QAM or not.

How do I record a stream from DVB?

You can use dvbstream and dtvstream. See this post (March 19, 2005).

Links


http://www.pchdtv.com
http://www.xmission.com/~pchdtv/forum