Hear Clear; Radio Inhibit; Gps Or Gnss; Gps Performance Enhancement - Motorola APX 2000 User Manual

68012005017-DP
Chapter 7 : Advanced Features
7.13.3.6

Hear Clear

Hear-Clear is a noise reduction system which consists 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.
NOTE: This feature must be preprogrammed by a qualified radio technician. Check with your
dealer or system administrator for more information.
7.14

Radio Inhibit

This feature allows the system administrator to put a radio into a nonfunctional state when the radio is
missing or in an unknown hand. The radio stays in this state regardless of its power changes.
NOTE:
If the radio has Intersystem roaming capability, the system administrator is able to put the radio
into a nonfunctional state when the missing radio roams to another system.
The radio can only be uninhibited by receiving an uninhibited command from the system
administrator.
7.15

GPS or GNSS

NOTE: This feature is addressed as GPS across the manual as the naming convention of the
buttons and strings remain the same as the legacy feature of GPS.
The availability and accuracy of this location information (and the amount of time that it takes
to calculate it) varies depending on the environment in which you are using the GPS feature.
For example, GPS location fixes are difficult to obtain indoors, in covered locations, between high
buildings, or in situations where you have not established a clear broad view of the sky.
If adequate signals from multiple satellites are available, your GPS feature only provides an
approximate location, usually within 10 meters from your actual location, but sometimes farther away.
7.15.1

GPS Performance Enhancement

Sometimes, the GPS feature may be unable to complete a location calculation successfully. You then
see a message indicating that your radio cannot connect to enough visible satellites.
To maximize the ability of your radio to determine a fix, take note of the following guidelines:
• For your initial fix, hold the radio in the face position.
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