With the exciter being agile, the user can change frequency from 87.5MHz
to 108.0 MHz in 0.1Mhz increments. The step size is 100 kHz. At the lower
and upper frequency limits of the FM band, the frequency will wrap back
around.
Can set the desired Forward RF level between 1% and 105% of the rated
power of the unit. The gain on the driver stage is adjusted to maintain the
desired level
Choose the VSWR shutdown trip point to between 1.1:1 and 1.8:1. If the
measured VSWR is above the set trip point then the system will fold back
the forward power to a safe level.
Pre-emphasis adds a boost to high frequencies in the FM signal to increase
the signal above the noise floor. The FM signal then is de-emphasized at
the radio receiver. Users can change the amount of pre-emphasis to suit
their location and receivers. Setting the pre-emphasis to 0 µs turn off the
pre-emphasis. The North American standard pre-emphasis is 75 µs, while
most of the rest of the world incorporates 50 µs.
Controls from FM Settings Screen
Goes to FM Settings screen
Goes to Audio Levels screen
Enters selection mode to change options above
Goes to the Currents screen
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