Control Functions - Icom IC-28A Instruction Manual

SECTION 3 CONTROL FUNCTIONS
3-1 FRONT PANEL
LCD READOUT (4) (D
02 Ф 9 Refer to SECTION 8 - 2. (9
DUP TAR TONE WRITE SET T/DSQL
TONE [AQS]
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(D VOLUME CONTROL/POWER
SWITCH [VOL/PWR]
VOL/PWR
C) PUSH-ON
(2 SQUELCH CONTROL/CHECK
SWITCH [SOL/CHK]
SQL/CHK
PUSH-ON
Ф *
(8 VFO/MEMORY READ
о SWITCH [VFO/MR]
Push this control to turn the power ON and OFF. Turn the control
clockwise to increase the audio level. Refer to SECTION 5 - 1
RECEIVING.
The squelch circuit quiets the noise from the receiver while no
signals are being received. While monitoring a vacant channel, turn
the control clockwise until the green T/R LED goes out. Refer to
SECTION 5-1 RECEIVING.
A second function of this control is to allow the operator to monitor
the transmit frequency when the duplex mode is selected. Push the
control to use the CHECK function. The receive frequency is
restored when the control is released. Refer to SECTION 5 - 4
DUPLEX PROGRAMMING.
Push to select either the VFO mode or the MEMORY mode of
operation. When the MEMORY mode is selected, the letter "М"
appears under the memory channel number on the LCD readout.
Refer to SECTIONS 5 - 1 RECEIVING and 5- 2 MEMORY READ-
ING.
This is a multi-function switch which operates in different ways
depending on which mode is currently selected with the IC-28A/E.
In the VFO mode, the SET SWITCH permits programming of the
subaudible tone encoder on the IC-28A (U.S.A. version), the trans-
mit offset frequency and the tuning step size of the TUNING
CONTROL. Refer to SECTIONS 5-4 SUBAUDIBLE TONE EN-
CODER and DUPLEX PROGRAMMING, and 5- 1 RECEIVING.