Service manual

OPERATION
3-7
April 2001
Part No. 001-9800-203
After the highest programmed number is displayed,
wrap-around to the lowest programmed number occurs
and vice versa. The wrap-around tone sounds when
this occurs (if tones are enabled).
High Tier Models
The front panel Select switch is used to change
the system and group. Rotating this switch clockwise
increases the system or group, and rotating it counter-
clockwise decreases the system or group. After the
highest system or group is selected, wrap-around to
the lowest system or group occurs and vice versa. The
wrap-around tone sounds when this occurs (if tones
are enabled).
Pressing the Select switch toggles between the
system and group select modes. With the numeric
display mode (see preceding section), the active mode
is indicated by an arrow in the display. This arrow
points to “Sxx” when the system select mode is
enabled, and to “Gxx” when the group select mode is
selected (see following example).
Select Mode Indicator (Numeric Display Mode)
If the alpha tag display mode is selected (high tier
models only), the system or group select mode is indi-
cated by an underline in the left-most character posi-
tion. This underline is on the system alpha tag line
when the system select mode is selected, and on the
group alpha tag line when the group select mode is
selected (see following example).
Select Mode Indicator (Alpha Tag Display Mode)
Programming of the “Select Knob Default”
parameter determines if the transceiver reverts to the
system or group select mode. For example, if it is
programmed for the group select mode, it is in the
group select mode when power is turned on and
returns to that mode when the programmed delay timer
expires. This timer starts when a change is made, and
it is programmable for 0-15 seconds. When “0” is
programmed, the transceiver remains in the last
selected mode until power is cycled. Then default
mode is then selected.
3.4.6 SETTING SQUELCH CONTROL
The squelch level for LTR operation is set during
transceiver alignment and cannot be reset by the user.
However, the squelch level for conventional systems
can be set by the user as described in the following
information. If the squelch level cannot be changed by
the user (not recommended), a default level is used.
With low tier models, the squelch level can be set by
the user if the AUX1 or AUX 2 switch is programmed
for the Squelch function. With high tier models, the
FCN switch must be enabled.
With dual band (12.5/25 kHz) models, separate
levels are maintained for each band. Adjusting the
squelch with a 12.5 kHz channel selected sets the 12.5
kHz level, and adjusting it with a 25 kHz channel
selected sets the 25 kHz level. Proceed as follows:
1. Select a conventional system, and a non-busy group
programmed for carrier squelch. If the group is
programmed for Call Guard squelch, the monitor
mode described in Section 3.9.1 must also be
enabled.
2. With low tier models, press AUX1 or AUX2
(whichever is programmed for squelch adjust) so the
appropriate decimal point is lighted. Then within 8
seconds, press the CHL down switch until noise is
heard and then press the CHL up switch until the
noise just mutes.
3. With high tier models, press the FCN switch and
then within 8 seconds rotate the Select switch as you
would a normal squelch control. Rotate it counter-
clockwise until noise is heard and then rotate it
clockwise slightly past where the noise just mutes.
The squelch adjust mode is indicated by
System Select
Mode
Group Select
Mode
Group Select
Mode
System Select
Mode