Product manual

Contemporary Research 6 232-ATSC Digital HDTV Tuner
DIGITAL TUNING OF CABLE Channels
Symptom: Channel ID is in XX-XX form, not cable box Guide form
Cable boxes translate the actual channel #s into a virtual Channel Guide, using channels 2
– 900, or more.
The actual (physical) channels have IDs in XXX-XX form, just like off-air channels. Non-
cable HDTV tuners like the ATSC or LCD TVs don‟t provide Guide features, so the channels
will be displayed in their native, physical major-minor channel form.
Some cable franchisees have a listing by physical channel, many do not. You can press the
INFO button on the HD2-RC remote to view the channel name.
Symptom: The tuner found the Channel, but the screen is blank when tuned in
If the channel is scrambled, the screen will be blank, and a “SCRAMBLED” message will
appear on the screen. That means the channel is not Clear QAM.
Cable companies scramble all premium channels, while local HD and some basic channels
may or may not be scrambled, depending on the local cable provider.
o The best approach is to call the cable provider and ask for Engineering.
They can give you a list of clear QAM channels, complete with major-minor
channel numbers. That way, you know what can be tuned before you install
(and when you design the system).
o With that list, you could skip scanning and enter the channel numbers manually in
the tuner.
 Type in the Physical # of the channel, plus a – and 1. That way, the tuner
knows to look for a digital channel. Usually, the major number of a cable
channel is its physical channel
 When the tuner finds the channel, it will add all associated sub-channels
 Go to the onscreen Menu/Channels/Add-Delete. Move through the list of
sub-channels, using Enter to Delete any scrambled channels
o If you already scanned the channels, and have long list of scrambled channels, you
can erase scanned digital channels by using the D0=3, and T^ RS-232 commands.
This will scan analog channels and delete any digital channels in the scan list so
you have a clean slate for tuning.
Tip – to skip scanning analog channels, press Select or Enter once scanning begins.
POWER/VIDEO OUTPUT
Symptom: Tuner appears to be on, channel display is lit, but unresponsive, no video/audio out
This often occurs when a 232-ATSC is used to replace an old 232-series analog tuner.
The solution is to not use the old 500 Ma power supply, and use the 1.5 Amp power supply that
comes with the ATSC. The old supply has enough juice to light up the front panel LEDs, but nothing
else.
Symptom: No video on Component Out
The RGB and Component outputs are switchable, and the tuner ships set to RGB. Use Front Panel
Mode, next section to switch the HD analog video to Component.