Contemporary Research
10
QMOD-HDSC
Tips & Troubleshooting
Symptoms
Solutions
Error Codes
Encoder Error
“R” appears at top left of front panel display, notes the encoder is resetting:
Usually the VGA or scaler output is not set to 1080i/720p 59.94 Hz – Use
the Measure menu to see the H and V frequency
Press the left and right arrows together to reset the QMOD
If neither fixes the condition, call CR Support
“X” appears, notes there is no communication with the encoder
If you check the Firmware menu, the last 4 characters will likely be
“0000” instead of “02E5”
Call CR Support
No composite video signal
“V” Appears when there is no video input, often for RGBHV when
receiving a Component source
No FPGA firmware (QAM)
“xxxxxxx”
appears when you use the firmware loader, or press the right
arrow when you view the firmware version on the QMOD.
V X.X = Control Firmware
02E5 = Encoder Firmware
J83B and following = FPGA firmware
“xxxxxxx” means that the FPGA firmware is incomplete or corrupted.
Re-install firmware or call CR Support if you can’t update.
Green screen
That’s good news – it means the TV is receiving the channel from the QMOD. The
green (or blue, purple) background means that there is no video input or the
resolution of your source doesn’t match the QMOD settings.
Black Screen or No Signal
Reset the QMOD by pressing the Left and Right arrows together.
Component
No video – check input wiring and settings
Tip – you can use RCA to HD15 cable to connect
YPbPr
Press left and right panel buttons together to reset encoding
Tuning Issues
Displays not finding channel in scanning, or have problems locking on to channel.
Update QMOD Firmware
Check CRWWW.COM, Downloads for the latest firmware, download, and install.
Update Settings
The update won’t affect your current settings. Make sure you are set to Vid Bitrate
18, CVCT On, QAM 256, PMT 0.
Test offline
Test a sample TV connected directly to the QMOD to eliminate problems in the RF
system.
Can’t tune channel
This is generally a result of a problem in the “digital handshake” between the
modulator and the TV’s digital tuner. Modern sets such as LG accept a wide range
of settings in the channel and metadata.
Old TV – try 64 QAM, also note that many old TVs have very poor tuning
capabilities.
Old TV Firmware- TV brands update their firmware as well.
If the display tunes offline, then there are problems in merging the
QMOD with the RF system.
Call CR Support
No audio
Check audio inputs and wiring
Set source digital source output to PCM
Some Sharp displays lack the standard QAM codec to play MPEG1 stereo, those
models should be avoided for commercial sites.
