1 March, 2005
V1629OM.DOC/ A
Page 10 of 10
3.11 TROUBLE
SHOOTING
The V1629 is a reliable and easy to use unit but there could be some circumstances where the
output is not what is expected. This short guide may help to solve problems quickly.
SYMPTOM POSSIBLE
CAUSE(S)
No O/P from either channel
Is the module powered? Check the +V LED
Is the correct rear module being used?
Are the input(s) true SDI D1 signals.
No O/P from one channel
Is there a SDI D1 input?
Are you looking at chroma with the channel set to YC?
Is the input connected to the right BNC? Note that channel B input
is at the opposite end to channel A.
Mono Output (burst present)
The unit may be set to produce the wrong colour standard – PAL N
when you expect PAL I or PAL M when you expect NTSC. See
section 3.4.
Is the input monochrome?
Mono Output (no burst)
You are probably looking at the Y output with the channel set to
YC.
No syncs on output
Assuming the input is OK (correctly identified on the front panel or
over DART) then you are probably looking at the C output with the
unit set to YC.
Wrong colour standard
Set incorrectly on the DIL switch or over DART.
Wrong level in NTSC
Probably caused by the unit being set to Japanese NTSC on the
internal DIL switches or over DART.
Permanent PLUGE
Is the GPI input grounded? (Note that a 75R termination is
sufficient to enable PLUGE.) Either remove the GPI or set the
internal switch to inhibit it.
Can’t get PLUGE
Is it inhibited on the internal DIL switch?
3.12 DART
CONTROLS
The following parameters can be controlled over DART, and a corresponding status read back:
PARAMETER DEFAULT
STATE
Ch A YC Select
CVBS
Ch A Standard Select
PAL I or NTSC
Ch A Blank Vertical Interval
VI Passed
Ch A
Disable Dynamic Rounding
DR ON
Ch A
NTSC Japan
EIA NTSC
Ch B YC Select
CVBS
Ch B Standard Select
PAL I or NTSC
Ch B Blank Vertical Interval
VI Passed
Ch B
Disable Dynamic Rounding
DR ON
Ch B
NTSC Japan
EIA NTSC
Both Channels: PLUGE Select
Not Selected
The following parameters reflect the status of the module and can be read over the DART remote
control, but there is no corresponding control parameter:
PARAMETER
Local or Remote Control
Ch A
I/P Fail
Ch A
I/P Format (625 or 525)
Ch B
I/P Fail
Ch B
I/P Format (625 or 525)
