Operation 3-70, Figure 3-82 clarifier – BendixKing KHF 990 User Manual
Page 107
CLARIFIER
A clarifier function is provided by the KFS 594 which can be used to
adjust SSB reception in USB or LSB in the channelized mode of
operation. The CLARIFIER works whether the channel involved is
semi-duplex or simplex. It is not normally used in the AM mode and
cannot be used if the mode selector switch is in A3J or A3A position.
The purpose of the CLARIFIER is to help eliminate the unnatural
“tinny sound” found at times with SSB audio voice quality as a result
of off-frequency ground station transmissions.
To operate the CLARIFIER, unstow the “cursor” by pressing the
Frequency/Channel control knob (lower right). Press it until the last
digit in the receive frequency is flashing, then rotate this knob to
select a new number. If this doesn’t improve the quality of the audio
you are hearing, try additional changes in the last digit. In effect you
are making small changes in the receive frequency. (Radio amateurs
call this Receiver Incremental Tuning-RIT.) If you transmit while using
the CLARIFIER, however, you will transmit on the originally selected
frequency. The dash to the right of the channel number will not flash
and you will not enter the program mode. To exit clarifier operation,
press the STO button or return the digits to those originally selected.
Remember, long range HF signals received under less than optimum
propagation conditions may still vary in quality and volume.
Operation
3-70
KHF 950/990 Pilots Guide
Rev. 0
Dec/96
1
S
T
O
HF
OFF
TEL
AM
USB
LSB
A3J
A3A
VOL
SQ
083.7
14
-
22
CH
M
H
Z
T
X
K
H
Z
Figure 3-82 Clarifier