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U3020AS16
Service Information
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/65 W
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
(Not Used)
—
+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 and Y1154A) provides a passive control signal
interface between the 34945EXT module and the RF Switches.
I/O Distribution Board
The I/O Distribution board provides a passive control signal interface between
the controller module I/O port and the front panel Port LED board.
LED Indicator Board
This board provides an LED indication of the Port setting in the Test Set. The
LED indicator board is driven by the digital IO of the Test Set.
DC-DC Converter Module (24 Vdc Switch Drive)
This
module is an addition that will allow a faster switching configuration. It
employs the 12 Vdc mainframe power supply to increase the needed 24 Vdc
switch drive source.
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Keysight U3020AS16 User's and Service Guide
