Service manual

OPERATION
3-12
April 2001
Part No. 001-9800-203
shown below. With low tier models, if one of the
auxiliary switches is programmed for encryption (see
next paragraph), the display decimal point associated
with that switch is the encryption indicator.
Encryption can also be manually enabled or
disabled by the ENCRYPT menu parameter (high tier
only) an option switch if it is programmed for encryp-
tion. This allows the user to override the group encryp-
tion programming. Selecting another system or group
causes encryption to revert to the status PC
programmed for that group.
Encrypted calls are received even if encryption is
not enabled. However, encryption must be enabled to
transmit an encrypted call. When transmitting an
encrypted call, wait approximately 1 second before
speaking. This gives the receiving encryption device
time to establish synchronization which ensures that
all of the first word is received. If the proceed tone is
used (see Section 3.5.13), speaking can begin as soon
as it sounds because it is delayed for the required time.
3.5.8 FUNCTION SWITCH (HIGH TIER ONLY)
The FCN (function) switch performs the
following functions. If this switch is not programmed
or is disabled, these functions are not available. When
the function select mode is active, “FCN” is displayed
on the lower line of the display. This mode is automat-
ically exited if no additional activity occurs within 8
seconds.
Menu Mode Select - Pressing FCN twice selects the
menu mode described in Section 3.6.
Home System/Group Select - Pressing FCN and then
the Select switch selects the home system/group as
described in Section 3.5.9.
Squelch Adjust - Pressing FCN and then rotating the
Select switch sets the conventional mode squelch level
as described in Section 3.4.6.
3.5.9 HOME SYSTEM/GROUP SELECT
The Home Select feature quickly selects the
preprogrammed home system/group. With low tier
models, this is done by pressing the AUX1 or AUX2
switch programmed for this feature. With the high tier
models, the home system/group is selected by first
pressing the FCN switch and then the Select switch.
The home system/group is then displayed and it
becomes the selected system/group (it is not tempo-
rarily selected).
If the home system/group is selected while scan-
ning, scanning halts for the programmed scan delay
period. With high tier models, if the home system is
programmed but the group is left blank, the last
selected group in that system is selected. If no home
system is programmed or the FCN switch is disabled,
the home select feature is not available. With low tier
models, the home system/group must be one that is
selectable, and both the system and group must be
programmed.
3.5.10 HORN ALERT
General
This feature activates an external alert such as the
vehicle's horn or lights when calls are received on
selectable groups or priority ID codes programmed for
this feature. With high tier models, when enabled
either manually or automatically as described in the
following information, is displayed as shown in
the following illustration. With low tier models, if an
AUX1/AUX2 switch is programmed for horn alert, the
decimal point for that switch is the horn alert indicator.
If no horn switch is programmed, there is no indicator.
With low tier models, the horn alert on-off times
and number of cycles is fixed. When a call is received
that enables the horn alert, it turns on for 0.5 second
and off for 0.5 second for three cycles (3 seconds). It
then goes back to the disabled state. With high tier
models, the on and off times are each programmable
Encryption
Indicator
Horn Alert
Enabled