Icom IC-28A Instruction Manual page 25

5-9 OPTIONAL UNITS
E PROGRAMMING THE UT-28
DIGITAL CODE SQUELCH
UNIT
E PROGRAMMING THE UT-29
TONE SQUELCH UNIT
The following are descriptions for the operation of two optional
units which provide alternative squelch circuits. Refer to the
INSTRUCTION sheets which accompany each unit for installation
instructions and additional information.
1) Push the T/D. SOL SWITCH.
e "D.SOL'"' appears on the display.
2) Push the SET SWITCH.
e "D.SOL'" begins flashing on the display.
e A five digit group code and the memory in which it is stored
appear. There are three memories reserved for storing group
codes.
3) Use the front pane! DOWN/UP SWITCH to select the desired
group code memory.
4) Push the SET SWITCH again.
e AQS" begins flashing on the display and "D.SQL'"' disappears.
e A single digit in the group code also begins flashing.
5) Turn the TUNING CONTROL to set the flashing digit to the
number desired.
6) Use the front panel DOWN/UP SWITCH to select another digit in
the group code.
e The newly selected digit begins flashing and the digit may be set
with the TUNING CONTROL.
7) Set the three remaining group code digits in a similar manner. |
8) Push the SET SWITCH.
1) Use the DUPLEX SWITCH to select the simplex mode.
e "DUP-—" or "БОРУ" should not appear on the display.
2) Push the T/D.SOL SWITCH.
e "D.SOL" апа "TONE" appear on the display.
3) Push the SET SWITCH.
e "D.SQL" and "TONE" begin flashing on the display.
eA tone number and the memory in which it is stored appear.
There are three memories reserved for storing tone numbers.
e Refer to the chart for the correlation between the tone numbers
and their associated frequencies.