Operation - Honeywell KHF 1050 System Installation Manual

Preliminary - Subject to Change Without Notice
5. KPA 1052 Power Amplifier Built-In-Test
The power amplifier design incorporates provisions for
monitoring its own operation to detect any condition or
occurrence that the operator (a flight crew member) might
observe and interpret as a reason for requesting a
maintenance action.
The maintenance data collection provision includes the
following three types of monitoring: Power-On Test,
Conditions Monitoring and Initiated test, as defined
below.
PA Alarm 1 - This alarm will be generated whenever the SWR
at the input to the antenna coupler is too high. The
antenna coupler will try to retune to lower SWR during
transmit mode.
PA Alarm 2 - This alarm will be generated whenever an
invalid band error request occurs, a higher than normal
SWR within the PA is generated, a higher than normal
output power occurs, an over-temperature condition
exists, or the PA has no output power. This alarm inhibits
all transmissions.
The BITE tests that shall be performed at system turn-on,
at pilot activated or continuously are summarized in Table
1002.
Load SWR (PA ALM#1)
Temperature (PA ALM#2)
Transmitter Power at 50 W
(With KAC 1052 in the system)
Note1: PA ALM#1 and PA ALM#2 are sent to the KAC 1052 with
discrete lines. The KAC 1052 then sends the PA Alarm data to the
KRX 1053. Label 351 information is actually sent by the KRX 1053.
Revision 0
10640I00.SLK
N
KHF 1050 SYSTEM INSTALLATION MANUAL
FUNCTION
During Tx Only
PA BITE Matrix
Table 1002
POWER ON PILOT CONT
X X
23-10-09
Label 351
Bit
Note 1
X 18
X 18
18
Page 1004
Mar/2003