15.4 External I/O Section (BNC (IN/OUT) and I/O for
synchronous operation (SYNC IN/OUT))
BNC I/O
Item Specifications
Connector BNC connector
I/O level TTL
I/O logic Negative logic, falling edge
Minimum pulse width 10
μ
s
IN signal TRIG IN and OUTPUT
IN
OUT signal TRIG OUT, OUTPUT OUT, and READY OUT
I/O for Synchronous Operation
Item Specifications
Connector RJ-11 connector
I/O level TTL
Minimum pulse width 10
μ
s
Pinout
Pin No. SYNC IN SYNC OUT
1 OUTPUT IN OUTPUT OUT
2 NC NC
3 TRIG IN TRIG OUT
4 GND GND
5 NC READY OUT
6 NC
*
* This pin is used for servicing the GS200. Do not use it.