Patton electronics 1140RC User Manual page 13

4.3 WIRING UP THE MODEL 1140RC
Both of the rear interface cards compatible with the Model 1140RC
have one RS-232 port and one dual-connector fiber port (see Figure 6.
below). Depending upon the card you have, the fiber port will be either
an ST or SMA connector. The RS-232 port is always a female HD-26
connector.
Figure 6. Model 1140RC interface card options
4.3.1 RS-232 CONNECTION
The RS-232 port on the rear card of the Model 1140RC is wired as
a DCE, and uses a female HD-26 connector. The HD-26 is an alternate
connector according to the EIA RS-232E specification, and the pin-out
is the same as a standard DB-25. Pin 26 is not used.
You will need an interface cable to connect the Model 1140RC to
your RS-232 device. Assuming your RS-232 device is a DTE (PC,
host, terminal, workstation, etc.), the cable should be wired straight
through . You may either provide your own cable, or you may purchase
an HD-26 to DB-25 cable from Patton Electronics Company. Please
call the Patton Sales Department at (301) 975-1000 for price and
delivery information.
Notice!
Any terminal cable connected to the Model 1140RC
must be shielded cable, and the outer shield must be 360
degree bonded–at both ends–to a metal or metalized backshell.
Dual SMA
Dual ST
TX
RX
A1
HD-26 F HD-26 F
12
TX
RX
A1