Motorola APX Series User Manual

Rekey Requests, OTAR transmissions include Delayed Acknowledgments, and Power-up
Acknowledgments.
Some of the selected options require configuration at the Key Management Controller (KMC) site to
work properly.
NOTICE: This feature must be preprogrammed by a qualified radio technician. Contact your
system administrator for more information.
6.12.3.8
Infinite UKEK Retention
This feature enables Unique Key Encryption Key (UKEK) to be permanently stored in the radio even
when all the encryption keys are erased. Without this UKEK key, the radio cannot be rekeyed over the
air. The Infinite UKEK Retention settings can be different for each secure profile.
NOTICE: This feature must be preprogrammed by a qualified radio technician. Check with your
dealer or system administrator for more information.
6.12.3.9
Hear Clear
Hear-Clear is a noise reduction system which composed of Companding and Random FM Noise
Canceller.
Companding
Reduces the channel noise, such as OTA transmission that is predominantly present in UHF2 and
900 MHz channel with the following features.
Compressor
Reduces the background noise flow and the speech signal at transmitting radio.
Expander
Expands the speech while the noise flow remains the same at receiving radio.
Random FM Noise Canceller (Flutter Fighter)
Reduces the unwanted effects of random FM noise pulses caused by channel fading under high
Signal-to-Noise (S/N) conditions such as in a moving transportation. The fading effects, heard as
audio pops and clicks, are canceled without affecting the desired audio signal.
The Random FM Noise Canceller operates only in receive mode.
NOTICE: This feature must be preprogrammed by a qualified radio technician. Check with your
dealer or system administrator for more information.
6.13
Radio Lock
This feature requires you to enter a password to unlock the radio when it powers on. The default
password is 0123456789.
Your service provider determines the following requirements:
• Number of characters for a password (maximum 10 characters)
• Number of attempts for password entry
If you are prompted to change the password, enter a new password as reusing the default password is
not allowed.
If you exhaust all attempts at entering the correct password, the radio is deadlocked. Restart the radio
to start over.
6875947M01-HM
Advanced Features
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Motorola APX Series Specifications

General

Brand	Motorola
Model	APX Series
Category	Two-Way Radio
Language	English