HP 85106D mm-Wave System
6-19
HP 85105A mm-Wave Controller
Theory of Operation
Theory of Operation
The mm-wave controller when used in conjunction with the HP V85104 test
set, provides all of the features and functions of a full S-parameter test set.
Refer to the block diagram while reading the following description:
An LO signal is input to the rear panel of the mm-wave controller, divided
and input to two identical 2 GHz to 8 GHz leveling amplifier assemblies. An
RF signal is applied to the mm-wave controller rear panel, then sent to a
coaxial switch. If the mm-wave controller is the test set selected by the
HP 8510, the RF is routed through the coaxial switch the RF leveling
amplifier assembly and to a PIN switch were the RF is routed from the active
port (either port 1 or port 2) of the mm-wave controller.
If a coaxial test set is selected by the HP 8510, the RF signal is routed from
the coaxial switch, then out through the mm-wave controller rear panel.
Incident and reflected IF signals are applied to the mm-wave controller from
the test set modules via the module interface on the mm-wave controller
front panel. These signals are amplified and output to the analyzer to be
processed and displayed. If the coaxial test set is selected by the HP 8510 the
IF from the test set is routed through the mm-wave controller rear panel
connectors, J10 and J11, then to the HP 8510.
Whenever a test set module is connected to the module interface of the
mm-wave controller, a +5 Vdc level is applied to module interface pin 18.
The result - the ALC from the test set module is routed through the
mm-wave controller to the RF source. If the +5Vdc level is not at this pin,
then the internal ALC in the mm-wave controller is routed from the RF
leveling amplifier assembly to the RF source.
CAUTION
Electrostatic discharge sensitive
Handle only at static safe work stations.
The assemblies in these procedures are very susceptible to damage from
electrostatic discharge, and their reliability will be impaired.
Содержание 85106D
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