TM 11-5840-281-12-1
24. HEIGHT FINDER OPERATION. (CONT)
NOTE
Video clutter and the ways to reduce it are explained in Precision Approach
Operation, Video Clutter (para 2-7) and Search Operation, Reducing Video
Clutter (para 2-6).
When not in operation, perform Preliminary Control Settings (para 2-4) and
Preliminary Operating Procedure (para 2-5), omitting Scan and Video
Presentation checks, to place the radar set in operation. Perform Precision
Approach Operation (para 2-7) first, then perform the following.
1. Place EL CURSOR switch (1) to HF position.
2. Rotate ALTITUDE control (2) clockwise or counterclockwise until the height finder cursor bisects the radar target as
shown In view A.
3. Rotate EL TARGET control (3) clockwise or IF GAIN EL control (4) counterclockwise to reduce the vertical size of the
radar target. Use care when operating with a slave control-indicator, so as not to reduce the radar target too much.
4. On ALTITUDE indicator (5), obtain altitude (in hundreds of feet).
5. Place EL CURSOR switch (1) to GP position.
2-9. SIMULTANEOUS MODE OPERATION.
The simultaneous mode of operation utilizes both control-indicators. The control-indicator that is cable connected to the
radar set group is the master control-indicator. When the radar set is used in conjunction with a landing control system
shelter, either control-indicator can be designated the master by activating the MASTER IND 1-2 switch on control-
indicator C-7012rTPX-44. The master control-indicator will have a beta scan for precision approach operation and the
slave control-indicator will have a ppi scan for search operation.
NOTE
Reducing video clutter is accomplished by using the controls on the master
control-indicator. See Search Operation (para 2-6) and Precision Approach
Operation (para 2-7) for examples of video clutter that exist on ppi and beta crt
displays.
Go to Search Operation, Reducing Video Clutter (para 2-6) for procedures used
to reduce clutter due to ground returns and precipitation. Be careful that the
target being tracked on the slave is not lost when using controls on master
control-indicator to reduce clutter.
When not in operation, perform Preliminary Control Settings (para 2-4) and
Preliminary Operating Procedure (para 2-5), omitting scan and video
presentation checks, to place the radar set In operation.
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