BendixKing PS440 System KHF 1050 - Manual (Page 7)

FAIL MODE
If there is a failure in the PS440 the bottom row on the display will show
PANEL.
A failure elsewhere in the system will display FAIL (ACP in the case of
an Antenna Coupler pressure warning or failure) on the top row of the
display.
Depending on the nature of the failure, the system will display the follow-
ing on bottom row of the display:
RXEX Receiver/Exciter Failure
PA Power Amplifier Failure
CPLR Antenna Coupler Failure
PRS W Antenna Coupler Pressure Warning (service will be required
soon)
PRS F Antenna Coupler Pressure Failure (transmitter power has been
reduced to 50 Watts. The antenna coupler requires service.)
SQUELCH
The KHF 1050 system offers four types of squelch with corresponding
values as follows:
SBH - (Syllabic Squelch High). This is the default squelch and is usually
best for normal voice communications. A syllabic squelch opens upon
receiving a signal with voice-like characteristics while ignoring other sig-
nals. With syllabic squelch, there is the possibility that the first syllable of
a voice reception may be partially squelched. The possible adjustment
levels are open, meaning no squelch action (OPN), minimum (MIN),
medium (MED) and maximum (MAX).
SBL - (Syllabic Squelch Low). This squelch is also a syllabic squelch
and is intended for voice communications where the desired signal is
very weak and noisy. This squelch is more prone to opening on noise
than the SBH squelch. The possible adjustment levels are open (OPN),
minimum (MIN), medium (MED) and maximum (MAX).
SQH - (Signal/Noise Squelch High). This is a traditional signal-to-noise
squelch best suited for listening to non-voice signals, or voice signals
that do not respond well to one of the syllabic squelches. Compared to
the syllabic squelches, a higher signal level is generally required for this
squelch to perform well. The possible adjustment levels are 1-32, where
1 is open squelch.
SQL - (Signal Level Squelch). This is a signal strength squelch which
opens on any strong input signal. It opens quickly on strong signals, but
also opens on strong noise or static. Use of SQL is recommended for
use only with strong signals and under low noise conditions. This
Revision 1 May/2003 KHF 1050/PS440 Pilot’s Guide
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KHF1050 PG R1 4/29/03 3:14 PM Page 3