HP 8517B manual Isolating Signal Path Problems, Unratioed Power Test, Testing Signal Paths

Troubleshooting the Test Set

Troubleshooting Procedures

Unratioed Power Test

We will examine six RF signal paths in the test set by observing their associated IF signals. Figure 5-10through Figure 5-15show the test set traces (and simplified block diagrams) that are typical for RF paths 1 through 6.

Isolating Signal Path Problems

Figure 5-9 Diagram of IF Signal Path

Determining the RF component in the test set that is most likely the cause of a failure can be accomplished within four steps:

1.Run the signal-path tests on paths 1 through 6 using the procedures on the following pages.

2.Record your test results in Table 5-6for each path.

3.Compare the results in Table 5-6with those in Table 5-7.

4.Investigate the most probable cause, based on the information in Table 5-7.

Testing Signal Paths 1-4

1.Set the network analyzer to its factory default settings by pushing the front-panel TEST switch.

2.Set the source for step mode. Press the network analyzer keys:

INSTRUMENT STATE [PRESET]

STIMULUS [MENU]

{STEP}

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