TM 11-5840-281-12-1
1-14.
SYSTEM PRINCIPLES OF OPERATION.
The radar set group consisting of the receiver-transmitter, antennas, antenna drives, and pedestal is located adjacent to
the runway. The two control-indicator groups together can be located up to 250 feet from the radar set group. The
control-indicator that is cable-connected (three cables) to the radar set group Is designated the "master" and controls the
operation of the radar set group. The other control-indicator is connected by four cables to the master and is designated
the "slave". The control- indicators are identical and in an emergency may be interchanged as described in Emergency
Procedures (para 2-15). When In the shelterized configuration, both control-indicators are installed inside the shelter and
either control-indicator can be selected the master by using the MASTER IND 1-2 switch. Refer to TM 11-5895-474-12
addendum for information relating to the AN/TSQ-71 B landing control system.
The receiver-transmitter group may be manually rotated on the antenna pedestal to any reciprocal of a runway heading
through 360 degrees. This enables gca landing service to two runways from one site location with a minimum of system
realinement. More than two runways may be serviced from one site location, provided the radar set group is reoriented
and the cursors are realined.
1-15
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