Kenwood TS-140S Instruction Manual page 10

@ _ Display Panel
The fluorescent display tube displays operational in-
formation such as the operating frequency, memory
channel information, and RIT information. (See page
13.)
FUNCTION keys
A/B_ : Selects VFO A or VFO B.
SPLIT: For split frequency operations; A-R, B-T (A
receive, B transmit), or B-R, A-T.
A=B : Equalizes the frequencies and modes of VFO
A and VFO B.
@ _ RIT control
When the transmit frequency of the distant station
drifts a little bit during the QSO, but you do not wish
to alter your transmit frequency to compensate, you
may wish to make use of the RIT control function.
This control allows shifting the receive frequency
without shifting the transmit frequency. The RIT
control allows you to shift the receiver frequency.
This control is also useful for pileups when the DX
station is transmitting a little above or below his
receive frequency.
The RIT step size is either 10 Hz or 20 Hz. Please
refer to Section 4-2-8 for information on how to
select the desired step size.
Notes:
Tt
The RIT offset is displayed on the main display.
You can therefore preset the offset before you
actually need to use it. When you move to
another station make sure you turn OFF the RIT
switch.
. The figure at the right illustrates that the RIT
display and the VFO display may not agree exact-
ly in all instances since the RIT and VFO tune in
10 Hz steps. The normal resolution of the VFO is
100 Hz, so if the RIT or VFO is turned slowly the
associated display may not update immediately.
You will have to tune 100 Hz to see the display
actually change.
VFO RIT
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10
IF SHIFT control
The IF SHIFT control allows you to shift the IF pass-
band of the receiver, without changing the actual
center frequency of the receiver. This control is
useful when there is interference near your center
frequency.
Note:
The IF SHIFT control does not function in the AM or
F
USB mode
Interference from lower frequencies can be
reduced or eliminated by rotating the IF SHIFT
control in the @ direction. This will cause the
resulting audio frequencies to have a slightly tre-
ble response, i.e.low cut filter (low frequencies
attenuated). Interference from higher frequencies
can be reduced or eliminated by rotating the IF
SHIFT control in the © direction. This will cause
the resulting audio frequencies to sound a little
bassy, i.e.high cut filter (high frequencies at-
tenuated).
LSB mode
Interference from lower frequencies can be
reduced or eliminated by rotating the IF SHIFT
control in the @ direction. This will cause the
resulting audio frequencies to sound a little
bassy, just the opposite of the effect in the USB
mode. Interference from higher frequencies can
be reduced or eliminated by rotating the IF SHIFT
control in the © direction. This will cause the
resulting audio frequencies to appear a little on
the high side, again just the opposite of the USB
mode.
M modes.
es
Turned counterclockwise
=
Turned clockwise
=>
IF filter passband
characteristic
® ®
Signal \
Interfering signal (e)
Signal
Signal
(e) Interfering signal (e)
Turn the knob counterclock-
wise to eliminate interference
from signal ©).
Turn the knob clockwise to
eliminate interference from
signal @).
IF SHIFT operation