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4-3.
R-DX (Receive
Pre-Amp)
Under normal conditions, your TS-700SP has enough
sensitivity to receive incoming signals of average strength.
For weak signals and DX communications, the pre-amp may
be used.
This is turned on by the R-DX switch.
The gain of
the receiver RF stage is increased by several dB, thus in-
creasing sensitivity.
When using the pre-amp, the receiver is more suscep-
table to cross-modulation and blocking from strong signals.
It is only effective
on
weak
signals.
The
booster
also
amplifies external noise.
Sometimes turning on the noise
blanker will reduce this noise.
4-4.
RIT (Receiver Incremental Tuning)
The term
"RIT"
is an abbreviation
for "receiver in-
cremental tuning'.
The RIT feature enables you to shift the
receive frequency without changing the transmit frequency.
The receive frequency may be shifted up to +2 kHz.
Note:
The digital display
does
not show
this frequency
shift.
If you want to talk to two stations that are not exact-
ly on the same frequency, proceed as follows:
1. Tune in one of the stations (RIT off).
2. Turn on the RIT and tune in the other station with
the RIT control.
The RIT indicator will light.
Remember
to turn
the
RIT off before
tuning
to
another frequency.
4-5.
NB (Noise
Blanker)
The NB
(Noise
Blanker)
switch
is used to suppress
pulse noise such as ignition noise generated by cars.
4-6.
RF GAIN
(Fig. 7)
This is used to adjust the receiver RF stage gain. Nor-
mally, leave it fully clockwise.
For a very strong incoming
signal, turn it counterclockwise.
If there is a strong signal in
the vicinity of your operating frequency, lower the RF gain to
reduce intermodulation
interference.
If the RF GAIN is reduced excessively, the ''S' meter
deflection
will
increase
irrespective
of incoming
signal
strength, and is due to the circuit characteristic.
The
RF AGC
circuit is the threshold
type; the "S"
meter will read correct signal strength at all time.
14
Maximum
"S" meter reading
of an incoming signal.
AF
RF
GAIN &—
Gain
Pointer deflection
with RF gain
knob turned
counterclockwise
Full clockwise
Signals weaker
Z
position
than this level
are attenuated.
AF
RF
GAIN ©
Gain
A
anes mode, set
Tur
é
iterclock-
the METER switch to
wise erclock
the "S" position.
4-7. LOW
POWER
SETTING
Ps
°
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