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Enable Secure On Desired
Channels
Other Secure Options
Secure Retrofit Tuning
Secure Alignment
Procedure
General
Appendix A- 6
To actually use the secure option, Secure must be enabled on the
channels for which it is desired. A channel can be strapped to secure-
only, or clear-only, or secure/clear-selectable.
For conventional channels, proceed as follows: Press F4 at the Main
Menu to see the CHANGE/CREATE/VIEW menu. Press F6 to see
Conventional Systems, Personalities, MDC, Options. Press F3 to see
Conventional Personalities, Options. Press F6 to see the SECURE
OPTIONS screen. Press Tab to select the Secure/Clear Strapping field.
For trunking channels, proceed as follows: Press F4 at the Main Menu
to see the CHANGE/CREATE/VIEW menu. Press F4 to see Trunking
Systems, Personalities, Call Lists, Options screen. Press F4 to see
Trunking Personalities: Talk Groups, Emergency Options, etc. Press Tab
to select the Strapping field. An Announcement Group must be
specified for the Strapping parameter to appear. This selects the
Announcement Group Strapping. Press F7 to select Talk Groups. Press
Tab to select the strapping of each Talk Group.
There are other secure options that can be changed on a per-channel
basis, such as: Proper Code Detection, Transmit XL, or CFB. For
conventional channels, these options are found on the same screen as
Secure/Clear Strapping (F4/F6/F3/F6). These options are XL Transmit,
Scan Holdoff Strapping, RX Modulation, and Proper Code Detect. For
trunking channels, the only selectable option is Proper Code Detect.
This can be found by going to the MORE OPTIONS screen (F9) from
the screen that was used to select secure/clear Strapping for trunking
channels.
After installing a secure-retrofit board into a radio, the secure TX
deviation and the secure RX discriminator level must be tuned. Follow
the procedure outlined in Section 9 "Secure Alignment Procedure"
in this publication for the tuning of these two secure-related
alignments.
The TX deviation balance (compensation) does not need to be
performed as part of the secure retrofit procedure. Use the transmit
deviation balance (compensation) procedure as outlined in this
appendix, only when a complete radio alignment is being performed
with a secure board installed.
For optimum radio performance, the secure transmit deviation and
the receive discriminator level must be set. Refer to Section 5, "Radio
Alignment Procedure", for a description of the radio alignment test
setup, an RSS service menu overview, and for general radio tuning
procedures. All normal radio tuning should be performed in the
proper sequence before proceeding with secure tuning.
Note that the transmit deviation balance (compensation) tuning must
be performed differently if a secure board is installed in the radio.
Follow the procedure changes outlined below when tuning transmit
deviation balance, and complete the normal tuning. Then proceed

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