RADAR SWITCHBOARDS
The
switchboard, shown in figure
5-27, replaces all
1109, and
1505
switchboards. It provides selectable distribution of data
from any Navy conventional search radar set. The
digitally-controlled switchboard can accept signals
from five radar sets and four
interrogator sets. It
will then distribute them to six individual radar
indicators and six
decoders. It can also accept mode
control from any
decoder associated with any of the
radar indicators and switch the mode control of the
interrogator associated with the radar set being viewed
on that indicator.
switchboard allows radar and
signals from ship’s radar and RDDS (Radar Display and
Distribution System) inputs to be selected from up to 16
signal data converters. It provides up to nine selectable
outputs to the AN/SPA series radar indicators. So, up to
nine different operators can select one of 16 input
sensors to display at their indicator. Each of the 16 input
sensors can consist of three radar videos, RDDS (data
stream), and IFF control with its associated videos. The
more significant design features include:
Local or remote selection of input sensors
Conversion of RDDS (data stream) back to
analog (for older indicators)
Distribution of any of the 16 input sensors to any
of up to nine separate radar indicators
Detection of improper operation by self-test
(BIT)
Signal Data Converter
The Signal Data Converter, CV-3989/SP (SCV),
shown in figure 5-28, is designed for installation inside
the shipboard radar room. It is mated to the radar
(triggers), antenna azimuth, ship’s gyro-heading, and
ship’s speed or distance (ship’s pit log).
The SCV conditions and multiplexes the various
data inputs into a single digital data stream. his permits
a single cable to distribute RDDS stream data
throughout the Ship.
Some of these systems in-
clude:
Radar trigger(s)
Radar antenna
unstabilized)
azimuth (stabilized and
Figure 5-27.—Radar Distribution Switchboard, SB-4229/SP.
Dead reckoning information
Ship’s heading
Radar set sensor ID
The SCV also contains the necessary circuitry for
future growth and expanded use in data distribution. A
compatible switchboard is required to interface the data
from various radar sets with other systems.
Maintenance
The maintenance of the CV-3989/SP and the
SB4229/SP is performed by the Electronics Technician
(ET) assigned maintenance responsibilities for the
5-16
