Contemporary Research QMOD-HD Manual - Manual (Page 7)

Contemporary Research 7 QMOD-HD
Tips & Troubleshooting
Common Symptoms and Solutions
Symptom Solutions
QMOD channel tunes fine
connected directly to a TV, but
not when combined with in-house
RF system. There are several classic caused for this. When you insert the channel into the
house system, there are added interference and level issues.
 If you’re mixing with an incoming cable feed, assume there are no
“empty” channels. Usually, your QMOD channel conflicts with an existing
cable channel. Read the QMOD Integration Guide to learn how to use
blocking filters to screen out the offending cable channel.
 When your combining the QMOD channel with an existing system, it has
to be set to the right RF level. For example, if the analog channels are
running at 55 dBmV, you’ll need an RF amplifier to raise the QMOD 29
dBmV out to at least 45 dBmV.
 Use a digital RF meter.
QMOD channel is Green  Also could be Orange or Purple. This is the color background the QMOD
inserts when there is no or improper video input. This means that the
QMOD is working, the channel is tuned correctly, but there is an input
problem. It’s also good test signal when you set up QMODs before the
sources are connected. You can also feed audio to the QMOD and test
that as well.
 Patterned green over RGBHV/YPbPr image. Usually caused by extreme H
or V image shrink. When Horizontal or Vertical is active (white line in
middle of H or V bottom line, press the Up button and click the SELECT
button. That will reset values for that resolution to default.