Mdc Over-The-Air Rekeying (Otar) Page; Hear Clear - Motorola ASTRO APX 6000 Series Quick Reference Card

Hide thumbs Also See for ASTRO APX 6000 Series:
Table of Contents

Advertisement

MDC Over-the-Air Rekeying (OTAR) Page

This feature allows to view or define MDC Over-the-Air
Rekeying (OTAR) features.It is applied only when operating in
secure encrypted mode and only for conventional
communications. In additional to Rekey Requests, OTAR
transmissions include Delayed Acknowledgements, and Power-
up Acknowledgements.
Some of the options selected may also need to be set up at the
Key Management Controller (KMC) site to work properly.
Note:
This feature must be preprogrammed by a qualified
radio technician. Check with your dealer or system
administrator for more information.
36
English

Hear Clear

There are two components of Hear Clear.
1
Companding:
Reduces the channel noise, e.g. 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.
2
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 in a transportation. The fading
effects, heard as audio pops and clicks, are cancelled without
affecting the desired audio signal.
The Random FM Noise Canceller operates only in receive
mode.
Note:
This feature must be preprogrammed by a qualified
radio technician. Check with your dealer or system
administrator for more information.

Advertisement

Table of Contents
loading

Table of Contents