Installation Instructions

OM-E 2072-09287-00
3-12
3-5.2.3 Radio Filter Bandwidth and Service Type
The radio filter bandwidth must be selected in accordance with the type of signal to be transmitted and
received. For the transmit mode, the type of signal is identified by detecting the active PTT signal,
which is one of the following:
• MIC PTT – PTT from the microphone connected to the front panel AUDIO connector;
transmits your voice.
• Data PTT – PTT from a data device, for example, a modem, connected to the radio set through
the DATA connector; it causes the radio to switch to the data mode and transmit the modem
signal.
The radio operating mode is automatically adapted for best performance with the signal expected for
the detected PTT type.
A default filter bandwidth can be configured for each channel using MENU > MORE > PROG >
RAD > CHAN (if no particular filter is set for the current channel, the radio retains the previously
used filter). When a new type of call is received or sent, the bandwidth filter changes automatically,
depending on the PTT source (voice, data or CW), and the programmed bandwidth for the channel
being used.
Bandwidth set to: Service type: Filter changes after:
2.1 kHz Data First data PTT
2.7 kHz Voice First microphone PTT
3.0 kHz Data First data PTT
3.3 kHz High speed data First data PTT
CW Morse First CW PTT
LSM Low speed data First data PTT
NOTE
When the filter bandwidth is set to CW, the following CW filter
bandwidths can be configured in the Programming mode using
MENU > MORE > PROG > RAD > PRMT: 0.25, 0.5 or 0.8 (kHz).