UH-60Q 直升机技术手册 直升机操作手册 1(100)

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3.17.1 Antenna. Two PLS blade antennas are located under the fuselage. See Figure 3-1 for exact locations.
3.17.2 Controls and Functions. All controls for the PLS are located on the control display unit, mounted in the lower console. The function of each control is as follows:
CONTROL/  FUNCTION 
INDICATOR 
CDU Display  Shows survivor number, mode, and 
frequency. 
SVR  Identify  the  survivor  number 
displayed next to it. 

CONTROL/ INDICATOR
Alphanumeric Display
Frequency Display
Entry keypad
CLR ENT T/R INTG
MODE Select switch
OFF
BIT
FREQ
CODE

BRST
CONT
HOME
CHAN Selector A B
243.0
282.8
VOL knob
Remote Display Unit (on instrument panel)
FUNCTION
Indicate system mode of operation.
Indicates frequency of operation in the BRST, CONT, and HOME modes, or 6 digit survivor ID code, or results of BIT.
Used for survivor selection, survivor ID code entry, and channel A and B frequency selection.
Deletes indication on display.
Enters displayed value in memory.
Controls radio interrogation operations.
Locked out in OFF position. Pull and turn to change from OFF to any other position.
Removes power from set.
Starts built in test.
Enables entry of desired frequency.
Enables entry of codes for up to nine AN/PRC-112 radios.
Each interrogation is triggered with a manual command.
Interrogations are automatically transmitted by system.
Operates as direction .nding receiver.
Selects Channel A frequencies.
Selects Channel B frequencies.
Selects preset 243.0 MHz.
Selects preset 282.8 MHz.
Not connected.

ALPHANUMERIC

FREQUENCY DISPLAY
ENTRY KEYPAD

AB0616
SA

Figure 3-26. PLS Central Display Unit

CONTROL/  FUNCTION  CONTROL/  FUNCTION 
INDICATOR  INDICATOR 
NO UPDT  In  BRST  mode,  indicates  no  Bargraph  and  Gives  pilot  visual  steering 
response to last interrogation.  Bullseye  directions to survivor. 
In HOME mode, indicates receive  A solid bullseye is displayed when 
signal  strength  below  receive  the  helicopter  in  line  with  the 
threshold.  If  any  data  has  been  survivor.  As  the  helicopter  turns 
received, display  retains  the  last  away from the in line position, the 
valid reading until another survivor  bullseye extinguishes, and vertical 
is selected.  bars light up indicating direction of 
FT  NM  Indicate FT when distance is less than 9900 ft, and NM when range is greater than 9900 ft.  turn needed to line up with the survivor. The bargraph will activate one bar on each side of the solid sphere if a steering command has 
Distance display  Indicates distance from survivor.  not  been  received,  or  when  the 
system  is  in  BRST,  CONT,or 
HOME mode. 

DISTANCE DISPLAY

AB0617
SA

3.17.3 Modes of Operation.
3.17.3.1 Test Mode. Test mode is selected when the mode switch is in the BIT position. Built in test (BIT) takes approximately 5 seconds, and results in a display of BIT PASS or the name of the failed unit followed by FAIL.
3.17.3.2 Data Entry Mode. Data entry mode is selected when the mode switch is in the FREQ or CODE position. Use this mode to select and enter transponder codes and frequencies for the system to use.
　
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