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Preliminary - Subject to Change Without Notice
5.D.(1)(l) Other Side PPT- (J10531-37) OTHER SIDE PTT
Unit/Pin
76J1-23
76J1-15
76J1-36
76J1-57
Revision 0
10640I00.SLK
KHF 1050 SYSTEM INSTALLATION MANUAL
This input is continuously read.
NOTE: The VOICE PUSH-TO-TALK LO pin may be connected
externally to airframe ground in some
installations.
When asserted, the OTHER SIDE PTT input prevents the
system from transmitting.
This input is continuously read.
In a dual system installation, when this input is
connected to the KEY EVENT output of the KRX 1053
Receiver/Exciter in the opposite system, it prevents
this system from transmitting whenever the KEY EVENT of
the other system is asserted.
When asserted, bit 18 of message (Output label 037),
word ID #1 "Other side keyed" is set to 0.
The OTHER SIDE PTT and the KEY EVENT discrete
inputs/outputs function as an "interlock" to ensure
that both systems can not transmit at the same time.
Such an interlock function is required when two HF
systems share a common antenna on an aircraft.
Example: If the co-pilot is transmitting (or tuning the
antenna) on the right-side HF system, the pilot will
not be able to key the left-side system until the
right-side system returns to the receive mode. Once the
right-side system has returned to receive mode, the
pilot will be able to immediately transmit (or tune the
antenna) on the left-side system.
Function
Strapping
Power
MAU/MCDU
On/Off
Tuning Mode
Ground
Stuck MIC
TBD
Controller
Open
Select
N
May be grounded for KHF 1050 System
to be be always on.
Accepts burst ARINC 429 input.
Ground to limit transmission to 30
second default.
N/A with Burst Tuning Control.
23-10-09
Comment
Page 2034
Mar/2003
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