Troubleshooting the Test Set

Troubleshooting Procedures

Table 5-4 Instrument Self-Test Indicator State Definitions

Self-Test Indication

LSN

TLK

SRQ

REM

Time (Following Power-On)

 

 

 

 

 

 

Pass ROM Test

OFF

OFF

ON

ON

0.5 to 0.2 seconds

 

 

 

 

 

 

Start RAM Test

OFF

OFF

OFF

ON

N/A

 

 

 

 

 

 

Pass RAM Test

OFF

OFF

OFF

OFF

after 2 seconds

 

 

 

 

 

 

HP 85102 IF The service adapter can substitute as a test set by returning the 20 MHz IF Amplifier Test signal from the HP 85102 to the amplifier on the HP 85102. Doing this

determines whether a fault is in the test set or is in the HP 85102.

Figure 5-8 Service Adapter Connections

Using the Service Adapter

1.Connect the service adapter as shown in Figure 5-8.On the network analyzer, press:

INSTRUMENT STATE [PRESET]

MENUS [MARKER]

STIMULUS [MENU]

{STEP}

PARAMETER [MENU]

2.Examine each user parameter by pressing the {USER 1 a1} through {USER 4 b1} softkeys to observe unratioed power level traces at each channel.

3.The traces should be flat lines, quite close to one another, as indicated by the marker value (typically about –28 dB, ±5 dB).

5-12HP 8517B S-Parameter Test Set Manual