Panasonic WJ-SX550B Operating Instructions Manual page 22

r VS/VD Input Connector (VS/VD IN)
Accepts either the VD (Vertical Drive) pulse or the VS (Video Sync) signal for synchronizing the system.
Notes:
• This input is looped through to the VS/VD Output Connector.
• When the VD (or VS) signal is supplied to the VS/VD Input Connector, turn the VD/VS selection switch (SW4) on the cir-
cuit board to the VD (or VS) position. The factory default setting of the VD/VS selection switch (SW4) is VS. Ask quali-
fied service personnel about setting up this switch.
• The external sync signal should meet CCIR specifications and should not contain any jitters, such as a VTR playback
signal.
t VS/VD Output Connector (VS/VD OUT)
Outputs either the VD (Vertical Drive) pulse or the VS (Video Sync) signal for synchronizing other system components.
Note: The input at the VS/VD Input connector is looped through to this output. These inputs and outputs are connected
internally.
y VD Output Connector (VD OUT)
Outputs VD (Vertical Drive) pulses for synchronizing other system components.
Notes:
• The internal VD pulse or the loop-through external VD pulse is provided at this connector.
• When the VS signal is supplied to the VS/VD Input Connector, the VD output signal from the VD Output Connector
will be delayed by approximately 15 µs with respect to the V-sync of the VS input signal.
By changing the position of jumper connector (CN14) on the board, this connector can be used for displaying the system
status on the monitor screen. (Set Up Menu is displayed during setup mode.)
Caution
This board should be installed in the WJ-SX550B Matrix Switcher even if the WJ-AD550 Extension Unit is used.
23
3H
VS input signal
VD output signal
approx. 15 µ sec
V
2