Contemporary Research 7 QMOD-SDI
Tips & Troubleshooting
Common Symptoms
QMOD constantly resets – analog
inputs
Usually, the encoder is resetting because the input video isn’t set to a correct
HDTV resolution or frequency.
Check if your QMOD has V 5.1 or higher firmware, if not, go to
www.crwww.com/downloads.asp, and install new firmware to your
QMOD.
Front panel will show No Signal or Unknown SIG(nal) if the Component
input is selected, No Signal for Video
QMOD SDI switches to
background color during setup or
occasionally.
The SDI input processor constantly tests the quality and resolution of the SDI
input, then auto-syncs the QMOD resolution to match 1080i 27.97 Hz, 720p 59.94
Hz, or 480i 29.97 Hz. If you’re getting a color background, watch the bottom
right-hand corner of the QMOD LED screen for:
No Signal – not present or can’t lock on to signal. Check source or add a
SDI reclocker between the signal and the QMOD-SDI input.
Unknown SIG – the SDI resolution does not match the above 3
settings. Usually, the source video might be set for 60 Hz. Change the
source settings to the correct frequency.
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.
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.
Appears on QMOD front panel display
“*” appears at end of bottom line when not locked to SDI signal
“?” appears when SDI is locked but at incorrect resolution or Hz
“*” appears at end of top line when QMOD is using a virtual channel.
“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.
“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.
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