Contemporary Research QMOD-SDI Manual - Manual (Page 8)

Contemporary Research
8 QMOD-SDI
General Symptoms and Solutions
Symptoms Solutions
Status Codes Appears on QMOD front panel display
SDI Lock “*” appears at end of bottom line when not locked to SDI signal
“?” appears when SDI is locked but at incorrect resolution or Hz
Virtual Channel “*” appears at end of top line when QMOD is using a virtual channel.
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 the QMOD is in Video Input, and no video is
present. Goes away when video is active.
 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
 02A2 = 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
Wrong resolution – set both to match each other
Wrong vertical frequency, source must output 59.94 Hz
Press left and right panel buttons together to reset encoding
PC VGA PC graphic cards rarely output video-standard HDTV at 720p/1080i, 59.94 Hz
– use VGA scaler
 TV One iT-C2-400
 Extron DVS-340 (with recent firmware)
Set scaler Hz to 59.94 (some state 60Hz but do 59.94 on YPbPr outputs)
DVD Check cables and input setting
Some players only output 480p/480i on Component
Try changing Resolution
Tuning Issues Displays not finding channel in scanning, or have problems locking on to
channel.
Update QMOD Firmware Check CRWWW.COM 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.
QAM 64 Test You can set QAM to 64 and bitrate to 18. This has the effect similar to
raising RF level by 6 Db.
Test offline Test a sample TV connected directly to the QMOD to eliminate problems in
the RF system.
No audio For embedded SDI audio, update to firmware 3.8 or higher. This allows
playback of AES audio that does not use an error correction bit
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.