Filter
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VFO
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RIT
rotating the IF SHIFT control in the e direction.
This will cause the resulting audio frequencies to ap-
pear a little on the high side, again just the opposite
of the USB mode.
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.CW mode
The operation of the IF SHIFT control is similar to
that for USB with the exception that you can con-
trol the tone of the CW note by using the RIT
control.
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.XIT control
When the RIT/XIT control is rotated with the XIT
switch depressed the transmit frequency can be
varied + / -1 .2 kHz without affecting the receiver
frequency.
Pressing the switch again releases the XIT function.
@ RF gain control
This control adjusts the gain of the receiver high-
frequency amplifier section.
For normal receiver performance, and maximum gain,
this control should be in the full clockwise position. If
you are having trouble copying the desired signal make
a note of the stations peak S-meter reading. Then, ad-
just the RF control counterclockwise, so that the meter
needle is stationary at this level. Now, all signals that
were less than the desired signal will be attenuated,
such as static noise, etc., making the completion of
the OSO easier.
If the incoming signal pegs the S-meter you can also
reduce the receiver gain by counterclockwise rotation
of the RF control. The S-meter pointer will always ad-
vance up-scale as the RF control is rotated counter-
clockwise, as a visual reminder that the gain of the
radio has been reduced.
@ AF gain control
Turn the inside knob to increase or decrease the
volume.
~ SELECTIVITY switch
When an optional filter is installed, the radio's pass-
band can be switched to one of four different band-
widths.
@ RIT/XIT control
.RIT control
When the transmit frequency of the distant station
drifts a little bit during the OSO, 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
+ / -1.2 kHz. This control is also useful for pileups
when the OX station is transmitting a little above
or below his receive frequency.
Notes:
1. The RrT 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.
2. The figure at the right illustrates that the RIT dis-
play and the VFO display may not agree exactly in
all instances since the RIT and VFO tune in 10Hz
steps. The normal resolution of the VFO is 100 Hz,
so if the RIT or VFO is turned slowly the associat-
ed display may not update immediately. You will
have to tune 100 Hz to see the display actually
change.
The switch has five pQsitions; AUTO, N, M 1, M2 and
W, that are used to select the bandwidth. The M 1, and
N positions are not active until the optional filters are
installed, see the accompanying chart. This switch
should normally be set to the AUTO position. The IF
bandwidth will then be selected for optimum receiver
characteristics, according to the MODE that has been
selected. Manual override is possible by simple rota-
tion of the SELECTIVITY control.