Kenwood TS-430S User Manual

Page 10

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5.1.5.1.

SQUELCH

To eliminate receiver noise at the no-signal condition,

slowly advance the squelch clockwise until the noise just

disappears (threshold point).

The squelch will open and the speaker will operate when a

signal is received. If the signal is weak or fades, readjust

the squelch for consistent reception.

5.1.5.2.

NOTCH CONTROL

If a single tone such as a CW signal is superimposed on

the receive signal, turn the NOTCH ON and adjut the

NOTCH control to eliminate or minimize the beat signal. A

beat of approximately 900 Hz can be eliminated at the

center position of the control. The NOTCH is effective bet

ween 350 and 2600 Hz.

5.1.6. RIT CONTROL

By using the RIT (Receiver Incremental Tuning) control, the

receive frequency can be shifted by about ± 1 kHz with

out changing the transmit frequency.

If the frequency of the station you are working changes,

your receive frequency can be reset by turning the RIT

switch ON and adjusting the RIT control. Adjusting the

control

clockwise

increases

the

frequency.

When

first

calling another station, the RIT should be OFF, otherwise

your transmit and receive frequency will not coincide.

5.1.7. 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. 5-3.

The IF SHIFT is effective in eliminating interference when

nearby signals are superimposed on the receive signal dur

ing either SSB or CW operation. IF SHIFT does not oper

ate in the AM or FM modes.

(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 (7 MHz and below)

Adjust the control in the + direction and higher frequen

cies are cut. Adjust the control in the - direction and low

frequencies are cut.

(3) CWMode

By using the IF SHIFT in conjunction with the RIT, tone

quality can be adjusted.

5.1.8.

NAR-WIDE switch operation

For short to medium distance communication, the WIDE

position may be used for both SSB and CW operatin. 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 SSB and CW wide position,

270 or 500 Hz for CW (with optional filters YK-88CN or

YK-88C)

and

1.8

kHz

for

SSB

(with

optional

filter

YK-88SN), in the NAR position.

*ln the AM MODE without an optional filter, both WIDE

NARROW positions are 2.4 kHz. With a YK-88A, Wide is

6 kHz, and Narrow is 2.4 kHz.

*ln transmit bandwidth is automatically WIDE.

PASSBAND WIDTH (-6 dB) kHz

MODE

SSB

WIDE

NARROW

WIDE

NARROW

WIDE

NAR

No optional filter

2.4

•

2.4

YK-88C or CN

2.4

500

or 270

YK-88SN

2.4

1.8

YK-88A

NOTE: ------------------------------------------------------------------------ .

1. Without optional filters, there is no SSB or CW recep

tion in the NAR switch position (*).

2. The NAR/WIDE switch does not function in the AM, FM

mode.

3. Without an optional filter, the AM mode bandwidth is

2.4 kHz.