Agilent Technologies M1205A V24, Руководство по обслуживанию, Страница: 131 / 358

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An RS232 Transmit/Receive (loop back) test can be performed to check both the transmit and
the receive capabilities of the RS232 port. The test is performed as follows:
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Change to Service Mode.
6WHS
Connect the RS232 loopback test connector to the RS232 port.
1
6WHS
Press .
6WHS
Press .
6WHS
Using the softkeys, configure the port to:
‡
Port #1:
Comp On
‡
Baud Rate: 9600
‡
Tx/Rx #1 Order: High/Low
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Press and then press .
6WHS
Power the instrument down.
6WHS
Power the instrument up.
6WHS
Press .
6WHS
Press .
6WHS
Press to initiate the loopback test.
The message
“RS232 port receive and transmit test passed”
appears
with
“Port #1 <-> Port #1”
if the test is successful; if not, the message
“RS232
port transmit and receive test failed”
appears. If the test is unsuccessful,
both the cable and the System Board should be examined and/or exchanged.
1
A loopback test connector can be fabricated from either a 9-pin male connector (which can
be directly connected to the RS232 port on the rear of the instrument) or from a 25-pin
female connector (which can be connected to the RS 232 port through the RS232 cable
supplied with the instrument.
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