Apr/2006 - Honeywell KHF 1050 System Installation Manual

These stations are located in Fort Collins, Colorado and Kekaha, Hawaii.
Consult the HF frequency propagation chart in
Propagation Distance"
time of day and distance from the transmitter. These stations transmit in the AM
mode. However, they can be received by the KHF 1050 System in the USB
Voice (UV), LSB Voice (LV), AM or Reduce-Carrier (RC) modes.
If a signal can not be heard, check the connection to the antenna, the antenna
itself and ensure that all coaxial cables that interconnect the KHF 1050 System
are properly connected.
4. Adjust the squelch level as needed to LOW, MED or MAX to achieve the
minimum level required to suppress the receiver noise on a channel tune has
no voice signal present.
2.E. Transmitter Performance Check
1. Select the HF position on the audio panel microphone switch.
CAUTION: VERIFY THAT NO ONE IS STANDING ON THE GROUND NEAR
2. Select a channel on which the aircraft is authorized to transmit, with the
appropriate mode of operation, which is typically USB Voice (UV). Momentarily
press the PTT switch to start the antenna tuning process.
Assuming the KAC 1052 Antenna Coupler has not previously been on this
frequency, the antenna coupler will begin to tune to the antenna and the
controller display will begin to indicate that tuning is taking place. Refer to the
controller information for the details of how tuning is annunciated by the
particular controller being used. When using an RM-855 controller, only an
audio tune tone is available.
In the event that the operating frequency selected had previously been tuned
by the KAC 1052 Antenna Coupler, the antenna coupler will utilize stored tune
information and match to the antenna in less than 50 msec. However, changes
in antenna impedance can occasionally result in the KAC 1052 needing to
retune on a previously tuned frequency.
Revison 2
N
KHF 1050 SYSTEM INSTALLATION MANUAL
for an overview of the frequency to use for a particular
THE AIRCRAFT OR TOUCHING THE AIRCRAFT. WITH MANY
TYPES OF AIRCRAFT HF ANTENNAS, THE ENTIRE AIRFRAME
BECOMES PART OF THE ANTENNA. ANYONE STANDING ON
THE GROUND COULD RECEIVE AN ELECTRICAL SHOCK IF
TOUCHING THE AIRCRAFT, OR IF ENTERING OR EXITING
THE AIRCRAFT DURING A TRANSMISSION BY THE KHF 1050
SYSTEM. DO NOT OPERATE THE HF SYSTEM WHILE THE
AIRCRAFT IS BEING FUELED.
"Table 2008 - Typical HF Signal
23-10-09
Page 1007

Apr/2006