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The main tuning knob is also equipped with
a variable rate function. Unlike tuning STEP
as set via the STEP button, the rate control
is used to determine how many steps per
revolution the main tuning knob makes.
The FAST rate is slightly less than 2x the
SLOW rate. See VFO ENC RATE in
Section 4.
The main tuning knob has an adjustable
drag feature. See DRAG ADJUSTMENT
FOR THE MAIN TUNING KNOB in Section
5 of this manual.
(20) MNU
The MNU button is used for two functions.
A momentary push of the MNU button
enters or exits the transceiver menu system.
The function of all menu items can be found
in Section 4 of this manual.
The MNU button can also be used to lock
the main frequency tuning knob. Press and
hold for 2 seconds. The red LED above the
MNU button will light, indicating the tuning
knob lock is in use. To disable, press and
hold MNU for 2 seconds. The LED will go
dark and the main tuning knob will be again
in use.
While the lock function is in use, the menus
can still be accessed by momentarily
pushing the MNU button.
To exit the menu, press MNU.
Tip: the menu system can also be exited by
pressing the MULTI encoder or any other
transceiver button.
(21) TX, ALC, RX
These are indicator LED's.
In receive mode, the green RX LED will be
lit. When transmitting, the TX and/or ALC
LED's will light. In AM and FM modes, the
TX and ALC lights will be lit constantly while
transmitting.
In CW modes, the TX and ALC LED's will
blink on and off with each character
transmitted.
588 manual
Part #74409
Printed in USA
In LSB and USB modes, the TX LED will be
lit as long as the radio is in transmit. The
ALC light is used to adjust proper mic gain.
See (25) MIC/MON.
(22) RIT, XIT, RIT/XIT ENCODER
The knob located directly below the RIT and
XIT buttons at far right is used for
adjustment of RIT or XIT value.
To turn RIT and/or XIT on, press the
appropriate button. When RIT is pressed,
RIT+0000 will appear on the screen. When
XIT is added by pressing XIT, the display
will change to read RIT/XIT+0000.
When turned on, RIT can quickly be cleared
to zero by pressing the RIT button. Same
applies to the XIT button. If both are in use
simultaneously, pushing either button will
clear to zero.
RIT and/or XIT value will be retained and
brought back up if other than zero when they
are turned off.
To exit RIT and/or XIT, press and hold the
appropriate button for two seconds.
(23) ALT
Buttons 24 through 29 are dual function
buttons. The functions indicated in white
lettering are primary functions (meaning
when the button is pushed, that function is
active). The functions indicated in yellow
lettering are alternate functions and are
accessed by first pressing the ALT button.
Press ALT. The horizontal lines that
separate the transceiver functions shown at
the bottom of the screen will move
downward and turn yellow and ALT will
appear on the screen at lower left.
There is a window of 5 seconds for a button
to be pushed, selecting an ALT function
after the ALT button is pushed. If no
function is selected, ALT disappears from
the screen and the radio returns to regular
operation.
Second release – August 2007
13
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