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An electronic plug-in test set | Up
Fire Controlman Volume 05-Display Systems and Devices | Next
Chapter 4 -The Computer Display Set AN/UYQ-21 (v) |
P U L S E A M P L I F I E R / S Y M B O L
GENERATOR (PA/SG)— The PA/SG is really two
pieces of equipment in one cabinet. The pulse
amplifier provides amplification and distribution of
computer data to the PPI consoles.
The pulse
amplifier also receives data from the PPI consoles
for input to the computer. The symbol generator
decodes data from the CDS computer and generates
the symbol waveforms or stroke code to paint a
symbol. Systems with PPI consoles that have the
console internally generated and refreshed symbols
(CIGARS) modification installed will not have a
separate symbol generator. In these systems only,
the pulse amplifier is installed.
Systems with
CIGARS modified PPI consoles that also have the
direct computer interface (DCI) will not have either
the pulse amplifier or symbol generator.
PLAN POSITION INDICATOR (PPI)— The
PPI receives data from the RDDS and CDS
computer and creates a visual display on a CRT.
There are several models of the AN/UYA-4(V) PPI.
The PPI also allows the operator to input data to the
CDS computer.
DATA DISPLAY GROUP SIMULATION
AND TESTING— The data display group allows for
the generation of simulated video and radar signals
using the video signals simulator (VSS) and offline
testing of most equipment using the test message
generator.
Circuit card repair and alignment is
accomplished using the electronic plug-in test set.
VIDEO SIGNALS SIMULATOR (VSS)— The
VSS generates simulated video and radar signals for
operator training and system troubleshooting. The
VSS can generate simulated video using inputs from
a ship’s radar system and can mix simulated video
with actual live video.
TEST MESSAGE GENERATOR (TMG)— The
TMG allows the maintenance technician to input up
to four computer words to paint symbols on the PPI
consoles.
This allows the operator to perform
offline tests on each individual CIGARS equipped
console or one display group.
ELECTRONIC PLUG-IN TEST SET— The
electronic plug-in test set allows the technician to
troubleshoot and align circuit cards and assemblies
of the Data Display Group AN/UYA-4(V). Special
adapters and cables allow the technician to control
the signals applied to each pin of the card under test
to isolate the faulty circuit.
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