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4-9. Setting the PROTECT/UNPROTECT Switch to UNPROTECT
The effects of ELECTROSTATIC DISCHARGE can damage electronic compo-
nents. Use grounded wrist straps and mats when you are performing any kind of
service on this module.
The oscilloscope board contains a calibration PROTECT/UNPROTECT switch. This switch must be set
to UNPROTECT before calibration can be done. Set the switch to UNPROTECT as follows:
1. Remove power from the instrument. Pull halfway out all of the modules located above the
oscilloscope and remove the filler panels and cards located above the oscilloscope. See figure 4-1
for the removal sequence.
2. Remove the oscilloscope module and set the PROTECT/UNPROTECT switch to the UNPROTECT
position. See Figure 4-2 to locate this switch.
3. Repeat step 2 for every oscilloscope module if this is a multimodule calibration.
4. Reinstall the modules and filler panels in reverse order of steps 1 and 2.
Figure 4-1. Endplate Overlap - Top Sequence
Figure 4-2. Location of the PROTECT/UNPROTECT Switch
HP 16532A - Calibration
4-3