Motorola GP68, Service Manual

Page: 48 / 85

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6881086C09-O March, 1997
Radio Programming Information GP68 Portable Radios Service Manual
Programming the GP68 Radio
NOTE
If you reach the upper or lower limit of the
PL/DPL codes, the displayed code wraps
around to the opposite limit and starts to
increment or decrement from that point.
Press the Light/Enter Button for three seconds, then
release. Press the Light/Enter Button again until “Pch”
with the channel number is displayed.
The new Receive PL/DPL code is adopted.
To Select the Transmit PL/DPL Code
There are 126 different Transmit PL/DPL codes available,
numbered from 001 to 126 (see Receive and Transmit PL/
DPL Codes on page 4-9). Transmit PL/DPL code ‘000’ rep-
resents Carrier squelch.
From the frequency mode, press and hold until
the LCD displays ‘rPL.” followed by the active Receive
PL code number (takes about 3 seconds). Press
momentarily to toggle the display to ‘tPL.” followed by
the active Transmit PL code number. You can toggle
between editing of the Receive and Transmit PL/DPL by
pressing momentarily. In the following example
(Figure 4-19), the Transmit PL/DPL code is 020.
Rotate the Channel Selector Knob clockwise to
increase, or counter-clockwise to decrease, the active
Transmit PL/DPL code.
NOTE
If you reach the upper or lower limit of the
PL/DPL codes, the displayed code wraps
around to the opposite limit and starts to
increment or decrement from that point.
Press the Light/Enter Button for three seconds, then
release. Press the Light/Enter Button again until “Pch”
with the channel number is displayed.
The new Transmit PL/DPL code is adopted.
NOTE
If the Receive PL/DPL code is programmed
for ‘000’, then the Receive PL/DPL (Coded
squelch) mode cannot be selected. To select
the Receive PL/DPLmode, the Receive code
must be changed to other than zero (see To
Select the Receive PL/DPL Code on page 4-
7 and Receive and Transmit PL/DPL Codes
on page 4-9). For Transmit, PL/DPL codes
are transmitted if the selected Transmit PL/
DPL Code is non-zero.
Figure 4-17 Selecting the Receive PL/DPL Code.
Figure 4-18 Selecting the Transmit PL/DPL Code.
3
UHF
C T C S
S
2
3
1
UHF
C T C S S
2
3
1
1
B
SQL
B
SQL
B
SQL
2
Figure 4-19 .
CTCSS
3