Contemporary Research
10
ATSC+SDI HDTV Tuner
Troubleshooting
TUNING CABLE CHANNELS
Tip:
The 232-ATSC+SDI will skip encrypted channels automatically when you activate a channel scan
Tip:
You can skip scanning analog channels by pressing
Select
after you start the scan.
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 companies are using a useful format – the cable channels will have a single virtual
channel that is the same as the Guide, and local TV channels may use the same virtual major-minor
listing as the off-air channel.
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.
POWER/ NO VIDEO or AUDIO
Symptom: Tuner cycles power and LEDs
Power supply is not providing enough amps of power (1 A or more). If you’re replacing an old CR analog
tuner, the old power supply is 500 mA, and will cause the “power cycle” effect. Use the power supply that
came with the tuner, or call to order a new one. Voltage range should be 11-14 VDC.
Symptom: Tuner appears to be on, channel display is lit, but unresponsive, no video/audio out
When the tuner turns on, it will display
Voltage Low
or
Voltage High
if there is power problem.
Go to the
Setup: Firmware
menu and click the
Right
key to display the exact voltage.
