33
7.7 Remote Port
The QM accepts commands from the RS-232C port. That means you can control
the QM remotely via a computer or any other serial device. To interface the computer
with the QM, the remote port of the multiplexer should connected with the DB-9 or DB25
connectors with the following connection.
Note: When using a PC you must defeat the hardware port handshaking in software
or by hardware. In hardware you must connect RTS to CTS and also connect DTR to
DTS. In other words make the computer think the QM is always ready to recieve data.
)
8
/
4
M
Q
(
5
2
B
D
L
A
I
R
E
S
9
B
D
T
R
O
P
2
2
3
3
7
5
)
8
/
4
M
Q
(
5
2
B
D
L
A
I
R
E
S
5
2
B
D
T
R
O
P
2
3
3
2
7
7
Table 1: Remote Control connection with DB-25 to DB-9 Cable
Table 2: Remote Control connection with DB-25 to DB-25
