Rear Panel Features - HP 85106D Manual

HP 85105A mm-Wave Controller

Rear Panel Features

Rear Panel Features
1. Line Module
This assembly houses the line cord connector, line fuse and line voltage
selector. Pull out the top 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 voltage setting.
Recommended fuse values are printed on the rear panel.
2. 0.5 V/GHz
This input to the instrument comes from the RF source. A voltage level of
0.5 volt is input to this connector for every GHz of RF source frequency. Pin
number 14 of the module interface on the front panel of the HP 85105A
carries this voltage to the test set modules.
3. LO Input
This input to the instrument comes from the LO source. The signal is split
and amplified then output to the front panel of the HP 85105A.
4. ALC Output
This dc level is applied to the RF source. The ALC signal is either generated
by the highband test set or the HP 85105A. If a test set is used, the ALC
signal generated by the test set is input to the HP 85105A via the front panel
module interface. If a highband test set is not sensed by the HP 85105A, the
internal ALC signal generated on the RF Leveling Amplifier Assembly is
routed to this connector.
Figure 6-5 Rear Panel Features of the Standard HP 85105A
HP 85106D mm-Wave System 6-9