HP 8511A Operating And Service Manual page 41

NOTE
Figure 4-2
Operation
The a1 or a2 input port must be used for system phaselock.
Rear Panel Features
5. Line module. This assembly houses the line cord connector, line fuse
and line voltage selector. Pull out the right side of the line module cover
to replace or change the fuse, or to change the voltage selection. Note
that the voltage selector drum must be removed to rotate it to a different
setting. Recommended fuse values are printed on the rear panel.
6. J10 Test Set Interconnect. This connector is used only in test sets with
Option 001. It allows connecting a second test set to an HP 8510 system
and automatically selecting the IF output from either test set for
processing by the HP 8510.
7. J11 Test Set Interconnect. This connector transmits the IF signal from
the test set to the HP 85102 IF Detector. It also transmits control signals
bidirectionally.
8. HP 8510 System Bus Address Switch. This five-gang binary-weighted
switch selects the system bus address of the test set. The binary weight
of each pole is indicated on the rear panel as are the on and off positions.
Decimal twenty (off-off-on-off-on, from left to right) is the default
setting.
9. J12 HP 8510 System Bus Connector. This connector is used for GPIB
communications with the HP 85101 display/processor.
4-2 HP 8511A Test Set Operating and Service Manual