Operation - Honeywell KHF 1050 System Installation Manual

Preliminary - Subject to Change Without Notice
5.D.(1)(d) Key Event - (J10531-13) KEY EVENT
5.D.(1)(e) Left Side (J10531-98) L SIDE and Right Side (J10531-13)
Revision 0
10640I00.SLK
KHF 1050 SYSTEM INSTALLATION MANUAL
In a system consisting of two external HF controllers,
with one controller connected to HF CONTROLLER INPUT #1
data bus and the other connected to HF CONTROLLER INPUT
#2 data bus, this tuning and control mode allows the
receiver/exciter to automatically accept
tuning/control data bursts from either controller.
In either the BURST or CONTINUOUS mode, the
receiver/exciter sends continuous data to the
controller.
The KRX 1053 Receiver/Exciter processor samples the
state of this discrete input only at initial power
application. The state of this discrete is assumed to
not change during operation.
The KRX 1053 Receiver/Exciter asserts the KEY EVENT
discrete output when the transmitter is activated by
any activation method.
This output may be used by external equipment, such as
a flight recorder, to sense when the HF system is
transmitting.
When the LEFT SIDE discrete input is asserted and the
RIGHT SIDE descrete input is not asserted, the KRX 1053
Receiver/Exciter accepts ARINC 429 data in which the
SDI field is set to 10B, 00B, or 11B. (SDI field 00B
identifies an "all call" message and SDI field 11B
identifies a "tune both" message.)
Additionally, the KRX 1053 Receiver/Exciter sets the
SDI field of all ARINC 429 transmitted messages to 01B
(bit 9 = 1, bit 10 = 0). This condition identifies the
system as HF #1.
When the RIGHT SIDE discrete input is asserted and the
LEFT SIDE discrete input is not asserted, the KRX 1050
Receiver/Exciter accepts ARINC 429 data in which the
SDI field is set to 10B, 00B, or 11B.
(SDI field 00B identifies an "all call" message and SDI
field 11B identifies a "tune both" message.)
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23-10-09
Page 2030
Mar/2003