Clearing user programmed emergency channels, Clarifier – BendixKing PS440 System KHF 1050 User Manual
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Revision 1 May/2003
KHF 1050/PS440 Pilot’s Guide
Clearing User Programmed Emergency Channels
Perform the following steps to revert back to the factory programmed
emergency channels.
1. Press the EMER button to enter the emergency channels.
2. Press and hold the left inner knob for 3 seconds to the system off.
3. Press and hold the EMER, TEST and FUNC buttons simultaneously
while pressing the left inner knob to turn the system back on.
4. Continue holding the three buttons until CLEMR is displayed in the
lower part of the display.
5. While still holding the three buttons, press the ENT button. All factory
programmed emergency channels are now restored.
CLARIFIER
The purpose of the Clarifier is to help elimi-
nate the unnatural “tinny sound” found at
times with SSB audio voice quality as a
result of off-frequency ground station
transmissions. The Clarifier works by
allowing frequency adjustment of ±250 Hz
whether the channel involved is semi-
duplex or simplex tuned. It is not normally
used in the AM mode.
Long range HF signals received under less
than optimum propagation conditions may
still vary in quality and volume.
To use clarifier, perform the following steps:
1. Turn the left outer knob to OPT. The Clarifier will be displayed first,
denoted by the C as shown in Figure 11.
2. Turn the right inner knob to adjust the Clarifier frequency up or down
for reception.
3. Select any other function to exit the Clarifier. When another frequency
or channel is selected the Clarifier value will return to 000.
MARITIME RADIOTELEPHONE NETWORK (PUBLIC CORRESPON-
DENCE) CHANNEL OPERATION
All 246 ITU public correspondence channels in the maritime radiotele-
phone network are programmed permanently in the electronic memory of
the KHF 1050 System. These channels may be used by aircraft to make
telephone calls through the High-Seas-Operator Network. Refer to
Appendix B for channels and frequencies.
To use the ITU channels perform the following steps:
Figure 11
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