Chapter 3 Front-Panel Operation and Features
RS-232 Interface Reference
66
DB-25 Serial Connection If your computer or terminal has a 25-pin serial port with
a male connector, use the null-modem cable and 25-pin adapter included with the
Agilent 34398A Cable Kit. The cable and adapter pin diagram are shown below.
RS-232 Troubleshooting
Here are a few things to check if you are having problems communicating over the
RS-232 interface. If you need additional help, refer to the documentation that came
with your computer.
• Verify that the power supply and your computer are configured for the same baud
rate, parity, and number of data bits. Make sure that your computer is set up for 1
start bit and 2 stop bits (these values are fixed on the power supply).
• Make sure to execute the SYSTem:REMote command to place the power supply
in the remote mode.
• Verify that you have connected the correct interface cable and adapters. Even if
the cable has the proper connectors for your system, the internal wiring may be
incorrect. The Agilent 34398A Cable Kit can be used to connect the power supply
to most computers or terminals.
• Verify that you have connected the interface cable to the correct serial port on your
computer (COM1, COM2, etc.).
Instrument
PC
DB9
Male
DB9
Female
DB9
Female
DB9
Male
DCD
RX
TX
DTR
1
2
3
4
5
6
7
8
9
GND
DSR
RTS
CTS
RI
TX
RX
RTS
CTS
DSR
GND
DCD
DTR
5182-4794
Cable
5181-6641
Adapter
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
2
3
4
5
6
7
8
20
DB25
Female
DB25
Male
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