Kenwood TS-130SE - Manual (Page 10)

4.1.5. IF SHIFT CONTROL
The IF SHIFT control is used to shift the passband of the IF
filter without changing receive frequency. By turning this
control in either direction, the IF passband is shifted as
shown in Fig. 4-3.
The IF SHIFT is effective in eliminating interference when
the receive signal is superimposed on nearby signals during
operation in both SSB or CW mode.
Turned in 0 direction
IF filter passband
Turned in © direction
e ©
© 0
Turn in © direction
to eliminate inter­
ference from signal (§)
Turn in © direction
to eliminate inter­
ference from signal @
Fig. 4-3 IF SHIFT CONTROL
(1) USB Mode (10 MHz and above)
Adjust the IF SHIFT control in the © direction and lower
frequencies are cut. Adjust the control in the © direction
and high frequencies are cut.
(2) LSB Mode (3.5, 7 MHz)
Adjust the control in the © direction and higher frequencies
are cut. Adjust the control in the © direction and low fre­
quencies are cut.
(3) CW Mode
By using the IF SHIFT in conjunction with the RIT, tone
quality can be adjusted.
4.1.7 NAR-WIDE switch operation
For short to medium distance communication, the WIDE
position may be used for both SSB and CW operation. For
DX (long distance) communication, the NAR position will be
an advantage in reducing interference.
This feature, in combination with the IF SHIFT control, will
provide outstanding interference rejection. The receive IF
bandwidth is 2.4 kHz in the wide position, and 270 or
500Hz for CW (with optional filters YK-88CN and YK-88C
respectively) and 1.8 kHz for SSB (with optional filter
YK-88SN), both in the NAR position. In transmit,
bandwidth is automatically WIDE.
PASSBAND WIDTH (-6dB) kHz
MODE
FILTER
CW SSB
WIDE NARROW WIDE NARROW
No optional filter 2.4 * 2.4 •
YK-88C or CN 2.4
500
or 270
2.4 «
YK-88SN 2.4 1.8 2.4 1.8
YK-88C or CN
YK-88SN
2.4
500
or 270
2.4 1.8
* Can not be received.
4,2 TRANSMISSION (Fig. 4-4)
CAUTION: -------------------------------------------
Before transmitting, be sure to connect an antenna or dum­
my load with a VSWR of less than 1.5:1. Never attempt to
transmit with the antenna terminal left open.
When testing the transmitter, connect a 50-ohm dummy
load, rated at more than 100W. Refer to Fig. 4-1 for initial
control settings.
When the TS-130SE is ready for transmission, use the
following procedure;
• SSB Operation
1 Set the MODE switch to SSB.
2 Meter switch to ALC.
3 Standby switch to SEND.
4 Speak into the microphone and adjust the MIC GAIN for
meter deflection within the ALC zone at signal peaks.
• PROC (processor) operation
In DX (long distance) operation, it may be desirable to in­
creased talk-power by using the speech processor.
The speech processor in the TS-130 Series combines an
audio compression amplifier with changes in ALC time cons­
tant to provide extra audio punch to increase average SSB
output power, while suppressing sideband splatter. To ac­
tivate, turn on the PROC switch, and readjust mic gain.
Operated as described, destortion will be minimal.
However, tone quality will be affected. It is therefore ad­
visable to conduct normal operation with the processor dis­
abled.
NOTE: --------------------------------------------------------------------------
When a high-output microphone is used, input overload and
distortion will result.
To prevent this, use an attenuator in the microphone circuit
as shown below, or connect a 10k —33kS2 resistor (depen­
ding on microphone used) across the microphone input.
(Mic control setting should be approximstely 12 O'clock)
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