TEX1000-LCD
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User Manual
Rev. 1.1 - 23/06/05
4. General Description
The
TEX1000-LCD
, made by R.V.R. Elettronica SpA, is an
exciter for Frequency
Modulated audio broadcasting
in a frequency modulation able to transmit in the
band between 87.5 and 108 MHz in 10kHz step, with an output RF power adjustable
up to a maximum of 1000 W into a 50 Ohm standard load.
The
TEX1000-LCD
is available in version with Integrated Stereo Coder.
This exciter contains a low-pass filter that reduces the harmonic emissions to below
the limits allowed by international regulations (CCIR or FCC), and can therefore be
used as a
transmitter
connected directly to the antenna.
Outstanding audio features this device has are low distortion and intermodulation
values (typically 0.03%) and the high signal to noise ratio (typically 80 dB).
Important
TEX1000-LCD
features are compactness and great use simplicity. The
machine, infact, was designed to be modular: its various functions are run from
modules nearly all connected to each other with male and female connectors or with
flat cables ending in connectors. This type of design makes maintenance operations
and any required module replacement easier.
The RF power section makes use of four MOSFET modules, able to deliver more
than 300W each.
The operating frequency is governed by a thermally-compensated, reference oscillator
working within a phase-locked loop (PLL). The
TEX1000-LCD
reaches frequency
lock within a maximum of 30 seconds.
The
TEX1000-LCD
is able to work in all range frequency without calibration and
setting operations.
The microprocessor system includes an LCD display on front panel and push-button
panel for interaction with the user, and implements the following functions:
•
Setting the output power
•
Setting the operating frequency
•
Activation and deactivation of power delivery
•
Measurement and display of the working parameters of the exciter
•
Communications with outside devices
Four LEDs indicate the machine status and are found on the front panel: ON, LOCK,
FOLDBACK and RF MUTE, moreover two red LEDs indicate eventual Power Supply
breakdowns.
