EFJohnson LTR-Net 002-9803-601 - Manual (Page 22)

GENERAL FEATURES
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parameter or option switch is not available, encryption may be fixed
in the enabled mode by programming. When encryption is enabled,
is indicated in the upper part of the display (see page 14).
To transmit an encrypted call, encryption must be enabled as
just described and the selected group must be programmed for
encryption. Encrypted calls are always received regardless of the
currently selected encryption mode and group programming (if the
radio is equipped with encryption). When transmitting an encrypted
call, wait approximately 1 second before speaking. This gives the
receiving transceiver time to establish synchronization which
ensures that all of the first word is received. If the proceed tone is
used and an encrypted call is transmitted, two beeps instead of one
sound and the tone is automatically delayed for the required time.
Function (FCN) Switch
If an option switch is programmed for FCN (function), it selects
the following features. When the function select mode is active,
“FCN” is displayed on the lower line of the display. This mode is
automatically exited 2 seconds after a change is made or 8 seconds
after no activity.
Menu Mode Select - Pressing FCN twice or the Menu option switch
selects the menu mode as described on page 33.
Home System/Group Select - Pressing FCN and then the Select
switch or the HOME option switch selects the home system/group as
described in the next section.
Squelch Adjust - Pressing FCN and then rotating the Select switch
with a conventional system selected sets the squelch level as
described on page 18.
Home System/Group Select
To select the preprogrammed Home system/group, simply press
the FCN switch and then the Select switch. Alternatively, press the