User's Manual

NEXUS BROADCAST PRODUCTS
The model NBE-25 is an FM broadcast exciter transmitter based upon a totally solid
state design, using the latest modern and reliable techniques on the market.
The main characteristics of the equipment are:
! Output power adjustable from frontal panel between 0 to 20 Watts, with automatic
power control, the output power does not vary with change of temperature.
! Protection for excessive reflected power: if it goes over 5 W the incident power is
reduced to ensure the reflection level does not exceed 5 W;
! The power stage allows open circuit and short circuit operation of the output, due to
use of an MRF173 MOSFET that has a maximum RF power of 80 W;
! The control-interface unit is an microprocessor which by using the front panel push
buttons can program the VCO frequency from 87.50 MHz to 108.00 Mhz. In order to
change the frequency a password is required.
This exciter is built into one 19" rack space, comprising a number of interconnections
between modules mounted internally on the bottom of the apparatus, for easy removal
and replacement.