Keysight U3020AS26, Руководство пользователя и сервисное руководство

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30 Keysight U3020A User’s and Service Guide
Figure 9 Test set block diagram
Controller module and power supply
Inside the controller module there are two main components, the AC-DC power supply and
controller board. The AC-DC power supply is a 12V/65W power supply that is converted to various
voltages by means of DC-DC converter inside the module. It provides regulated voltages to all
assemblies in the Test Set. The internal DC voltage has the following nominal specification:
– +24 V
– +12 V
– +5 V
The controller board is the “brain” of the Test Set, it handles all the communication between the
Controller and the Test Set via LAN or GPIB connectivity.
39495EXT module
This module provides the bias and control signals for the RF Switches.
Distribution board
The Distribution board (Y1151A) provides a passive control signal interface between the 34945EXT
module and the RF Switches.