HP E8402A, User And Service Manual, Page: 22 / 249

24 Getting Started Chapter 1
RS-232 Interface
The RS-232 interface on the rear panel of the Enhanced Monitor mainframes
(HP E8402 and E8404) can be used to control the Enhanced Monitor from a
computer or a terminal.
Refer to Chapter 3 for RS-232 programming information. The
SYSTem:COMMunicate:SERial ...
commands set and/or modify the
configuration of the Enhanced Monitor’s serial interface. Serial
communication commands take effect after the end of the program message
containing the command(s).
Default RS-232 parameters are:
•
Baud: 9600
•
Bits: 8
•
Parity: None
•
Stop bits: 1
•
DTR/RTS: On
•
Pace: XON
•
Echo: On
•
ERES: On
•
Line buffer: On
Note
If you use the Enhanced Monitor RS-232 interface (located on the
back of the mainframe) while the mainframe is in the standby mode,
you must supply an ex5Vdc to the +5VEXT connector
(located near the RS-232 interface). If you use the RS-232 interface
while the mainframe is powered on, you do not need to provide the
ex5Vdc.
Ex5V Supply
The Ex5V supply is for powering the Enhanced Monitor (including
the RS-232 interface) while the mainframe is powered down (standby
mode). This requires a stable 5 volt supply capable of 1.5A amps maximum
(500mA typical, refer to specifications in Appendix A). Refer to Figure 1-4.