Agilent Technologies E4418B Service Manual page 128

Troubleshooting
Introduction
All/Other
Which POST Test
Serial Interface
Select
System/Inputs
Remote Interface
Select Interface
GPIB (IEEE 488)
Prev
Command Set
SCPI
Connect power meter
to a GP-IB controller
and send the
command "*RST"
Investigate power
meter failure
A2 Processor assy
6-10
Figure 6-4: Troubleshooting Guide - RS232/422 Interface
Start
Power up
meter
POST
No
Pass?
failed?
Did power
Yes
meter reset?
No
A4 Comms assy
defective
defective
End
Yes
Select
System/Inputs
Remote Interface
Select Interface
RS422
Connect RS422 Self Test
Connector to RS232/422
Connector on rear panel
Select
System/Inputs
More
Service
Self Test
Individual
More
Serial Interface
RS422 Loop Back
Run Test
Yes
No
Test Pass?
No
Agilent E4418B/E4419B Service Guide
Select
Done
System/Inputs
Remote Interface
Select Interface
RS232
Connect RS232 Self Test
Connector to RS232/422
Connector on rear panel
Select
System/Inputs
More
Service
Self Test
Individual
More
Serial Interface
RS232 Loop Back
Run Test
Test Pass?
Yes
No fault found with
RS232/422 serial
interface check user
application/
implementation