Rs232 Port; Camera Inputs - GE SymDec 4 User Manual

10 SymDec 4
User Manual

RS232 Port

The RS232 port is provided for external control of the SymDec 4 from a PC via the PC's serial port. This
requires the use of a DB9-F to DB9-F null modem cable (or DB25-F depending on the type of RS232 port on
the PC).
Table 7. RS232 port pinouts
Pin
1
2
3
4
5
6
7
8
9

Camera Inputs

There are two BNC jacks for each camera. Either jack can receive a camera signal. The signal is looped
(directly connected to the other jack), making the camera signal available to other equipment.
The camera input connectors are auto terminating.
This means that the input signal will automatically be terminated with 75-Ohms unless a 2
to the 2 BNC connector of the same camera input. Make sure there is 75-Ohm termination at the end of the
nd
video line if the signal is looped through the SymDec 4.
Time base correction is performed during digital capture. As a result, cameras do not require synchronization.
Cable
Connectors
Auto terminating
Passive looping
Use
DCD
RX
TX
DTR
Grounded
Not connected
RTS
CTS
Not connected
75-Ohm coaxial
BNC
Yes
Yes
cable is connected
nd