Specifications

Troubleshooting
VTM Series Installation and Operation Handbook
7-3
Table 7-1. VTM Series: Problems, Causes, and Solutions (continued)
Problem/Symptom Possible Cause Solution or Explanation
Waveform not locked when
External Reference
(EXT REF) is selected (cont)
External Reference inputs are not
connected properly for the
configuration.
Check that the external reference
configuration is in the expected
mode (Loop or Split).
If in loop mode, there should only
be one input signal. If in split
mode, the Blackburst signal should
be applied to the REF A input,
while a Tri Level signal should be
applied to the REF B input.
Audio level reading too low
The input reference level is not
correctly set.
Use the SETUP MENU to check
the input reference level setting.
When displaying an A&B or
C&D parade, the second
display is not locked or is
offset
The two signals are not
genlocked or are not timed.
Genlock or time the signals.
There is excessive cable length. Add digital DA to cable run.
Add reclocking DA to cable run.
Eye Pattern not clear
There is excessive jitter. Source is causing jitter.
Picture width not correct
The aspect ratio is not set
correctly.
Change aspect ratio in the setup
menu.
Input switches by itself
The router control is on. Turn off router control in the setup
menu.
No communications on
remote (RCU) port
The baud rate is not correct. Select the proper RCU baud rate.
The IP address is incorrect. Provide the correct IP address in
setup menu.
No communications on
Ethernet port
Incorrect Ethernet cable. For a direct connection, use a
crossover cable. For a network
connection, use a standard
Ethernet cable.
If the problem still exists after troubleshooting the VTM Series, see Section 1, “Service
Support,” for further instructions.