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Alert Tone Indicators

Power-Up

Each time the radio is turned on, a microcomputer and syn-

thesizer self-test occurs. A high pitched alert tone is gener-

ated for approximately 1/8 second to indicate that the

microcomputer and synthesizer are functioning properly. A

second low pitched tone will then be generated if the start-

up test is not successful.

Transmit on Blank or Receive-

Only Channels

Pressing the PTT button while

tuned to a blank or "receive-

only" channel will cause an alert

tone. The tone will continue as

long as the PTT button is

depressed. The radio transmit-

ter is not enabled.

Transmit Inhibit on Busy Channel with Busy Channel

Lockout

Pressing the PTT button during a "busy channel" condition

(other than your PL/DPL group) generates a continuous

busy tone that lasts as long as the button is depressed.

Time-Out-Timer

The Time-Out-Timer (T.O.T.)

limits the amount of transmis-

sion time to a preset length. At

the end of this time an alert tone

indicates that your transmission

has been cut off. The alert con-

tinues as long as the PTT button

is depressed.

GP300 Portable Radios