User's Manual

5.6 ANALOG TAB PAGE
The analog page allows selection of the analog/voice mode parameters and is shown below:
The selections are:
TX pre-emphasis-Selects whether the external audio signal is pre-emphasized i.e. had its high-frequency
audio content boosted or whether the signal is sent with a flat audio response. Voice signals typically use
pre-emphasis.
RX de-emphasis-Selects whether the external audio output signal is de-emphasized i.e. had its high-
frequency content attenuated or whether the signal is outputted with a flat frequency response. Pre-
emphasis and de-emphasis are normally used together.
Busy Channel TX Lockout-This selection will allow a transmission to be inhibited if there is activity on
the receive frequency. This would normally be used when the transmitter and receiver operate on the same
frequency and is used to avoid interference to a transmission already in progress. The presence of activity
of the channel is determined by signals which exceed the Carrier Detect On setting (see below).
CD Output Level-Sets the logic level of the Carrier Detect Output pin.
Squelch Enable-Selects whether signals below the Carrier Detect Off level will be muted (squelched) or
whether all signals are allowed to pass to the audio output pins.
TX Timeout Timer-Selects whether the transmitter in limited in the maximum time that it is allowed to
transmit continuously and how long that time would be. This is designed to avoid overheating the
transmitter when the Test (PTT) pin is taken active for a long time.
Aux Out (RX) Gain-Sets the audio output level for the audio output pins.
Aux In (TX) Gain-Sets the gain, not the maximum deviation, for signals at the audio input pins.