HP 8517B manual Assembly Replacement Procedures, Initial Precautions Switch/Splitter Replacement

Initial Precautions

Switch/Splitter Replacement

HP 8517B Test Set Replacement Procedures

Assembly Replacement Procedures

Assembly Replacement Procedures

Before beginning any of the procedures in this chapter, do the following:

1.Turn off the HP 8517B test set.

2.Disconnect the test set’s power cord.

3.Remove the top- and side-covers, trim strips, and handles.

4.Do not exceed the maximum torque necessary to secure a connector. Refer to Table 6-1for torque specifications.

5.Exercise caution with semi-rigid cables; they can be bent very easily.

6.Reverse an assembly’s removal procedure for reinstallation, unless otherwise instructed.

A18 Switch/Splitter Assembly

1.See Table 6-2for component locations.

2.Remove the five semi-rigid cables and the three flexible cables from the switch/splitter. (Reposition cables as required to ease removal.)

3.Remove the two fixed attenuators from the switch/splitter (note that there are three fixed attenuators in Option 007, and in Option 004 “plus” 007).

4.Remove the two screws that attach the switch/splitter to the bracket.

5.Remove the switch/splitter from the test set.

Frequency Converter Replacement

A14, A10 to A13 Frequency Converter Assembly

The frequency converter consists of the A14 VTO (voltage-tuned oscillator) assembly and four samplers, A10 through A13. See Figure 6-2for component locations.

1.Remove the semi-rigid cable attached to each of the four samplers.

2.Remove the four in-line attenuators from the samplers (only in Options 007, Option 002 “plus” 007, and Option 004 “plus” 007).

3.Remove the six flexible cables from the frequency converter by pulling gently on the gold connector.

4.Remove the four frequency converter mounting plate screws and the bracket screw that fastens the frequency converter to the chassis.

5.Unplug the ribbon cable near the front panel.

HP 8517B S-Parameter Test Set Manual 6-5