Troubleshooting

Introduction

All/Other

Figure 6-4: Troubleshooting Guide - RS232/422 Interface

 

 

 

 

 

 

Start

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power up

 

 

 

 

 

 

 

 

 

 

 

meter

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

 

 

POST

 

 

Yes

 

 

 

 

 

 

 

 

Pass?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Select

 

 

 

 

 

 

 

 

 

 

 

 

System/Inputs

Which POST Test

 

 

 

 

 

 

 

Remote Interface

failed?

 

 

 

 

 

 

 

Select Interface

 

 

 

 

 

 

 

 

 

 

 

 

RS422

Select

Investigate power meter failure

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”

Did power

Yes

meter reset?

No

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

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

A2 Processor assy

A4 Comms assy

defective

defective

No fault found with RS232/422 serial interface check user application/ implementation

End

6-10

Agilent E4418B/E4419B Service Guide

Page 118
Image 118
Agilent Technologies e4418b, e4419b manual Troubleshooting Guide RS232/422 Interface