Hear Clear; Security; Using The Radio Lock; Unlocking Your Radio - Motorola ASTRO APX 7500 Series Quick Reference Card

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.
reduces the background noise flow and the
•
Compressor –
speech signal at transmitting radio.
expands the speech while the noise flow
•
Expander –
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.
This feature must be preprogrammed by a qualified
Note:
radio technician. Check with your dealer or system
administrator for more information.
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English

Security

Using the Radio Lock

This feature changes your radio to a more robust security
system that protects the use of the secure encryption keys.
If this feature is enabled in your radio by a qualified radio
technician, when you turn the radio on, the display shows Radio
locked.

Unlocking Your Radio

Procedure:
Enter your numeric password.
1
Secure-equipped radios – 6 to 8 characters.
Clear radios – 0 to 8 characters.
Press the Menu Select button directly below Select to enter
2
the code.
OR
Press the Menu Select button directly below Delete to
delete any unwanted characters.
OR
Press the Menu Select button directly below Cancel to exit
the feature.