I would initially say it is not feasible.  You would need multiple PCs
with several IMAQ cards (+ audio) each to get all the data into a
system, and very large, fast hard drives to store the data.  The drives
would fill up very quickly.

If you went to on demand recording of selected channels, it becomes
reasonable, but still big.  It would depend on the actual requirements.

One thing I would consider if you decide to do a system like this is to
look at video to firewire converters that combine a video and audio
signal and convert it to digital video for firewire.  I don't know if
this format is compatible with the NI firewire drivers (I doubt it), but
that might compress the video enough to record several channels on a
single computer.  They might be cheaper than IMAQ cards, which could
only handle one channel each.  They would also take care of
synchronizing the video and audio for you.  I don't know if the quality
would be considered professional quality, though.

I would probably just look at a large tape machine that records several
channels to a large magnetic tape, and have backup system ready when you
need to change the tape.

Bruce

------------------------------------------
Bruce Ammons
Ammons Engineering
www.ammonsengineering.com
(810) 687-4288 Phone
(810) 687-6202 Fax



-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Roman Golubovski
Sent: Monday, March 01, 2004 4:24 AM
To: [EMAIL PROTECTED]
Subject: [A] Infinite continuous logging of 16 TV (A+V) channels


Hello,

This is out of my expertise so I am posting it on the forum. A friend
from a TV station would like to set a system for continuous 24h (or
on-demand) recording of 16 TV channels (composite or AV) with
professional quality.

What would be the cheapest and most efficient solution HW&SW - single or
multiple IMAQ cards, single or multiple PCs, drivers, software, ...,
considerations on reliability?

I appreciate any info regarding any aspect, especially concrete
products.

Thanks in advance,


Roman Golubovski, MSc Dipl-EEng
[EMAIL PROTECTED]



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