Agilent Technologies e4418b, e4419b Suggested Diagnostic Equipment, Introduction, Troubleshooting

Troubleshooting

Introduction

Introduction

This chapter enables qualified service personnel to diagnose suspected faults with the power meter Rmt I/O (Remote Input/Output) signal lines and RS232/422 serial port.

If there is a problem when attempting to use the RS232/422 serial interface or the remote I/O functions, consult the User’s Guide and confirm that all the user setups are correct before proceeding with the following fault finding flow charts.

Suggested Diagnostic Equipment

1.Digital multi-meter capable of measuring voltage and resistance, for example, Agilent E4975.

2.Signal source capable of producing 300 ms TTL single shot pulses, for example, Agilent 33120A.

3.+5 V TTL logic level source.

4.RS232 self test connector - 9 way ‘D’ type female connector with the following pins wired together:

Pin 2	(Rx)	to Pin 3	(Tx)
Pin 4	(DTR)	to Pin 6	(DSR)
Pin 7	(RTS)	to Pin 8	(CTS)

5.RS422 self test connector - 9 way ‘D’ type female connector with the following pins wired together:

Pin 1 (CTS-) to Pin 9 (RTS-)

Pin2 (Rx-)	to Pin 4	(Tx-)
Pin 3 (Tx+)	to Pin6 (Rx+)
Pin7 (RTS+)	to Pin 8	(CTS+)

6.8 way RJ45 plug with flying leads wired to pins 2, 3, 4, 5 and 6 to apply and monitor signals on the remote TTL I/O connector.

7.HP-IB controller and cable - required to apply “*RST” command through the rear panel GP-IB connector.

Note	In the following flowcharts a bold font indicates the label of a
	soft/hard key the user must select.

6-2 Agilent E4418B/E4419B Service Guide