Elenos T30000, Handbook

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Hand Book T30000 -
20
Technical Office TEL: +39 532 829 965 FAX: +39 532 829 177
ACTIVATION OF THE TRANSMISSION SYSTEM
Before supplying electrical power to the transmission system, check that all equipment components have
there on/off switches switched OFF. Check that the frequency of the modulator has been correctly
programmed and that it has been adjusted for zero RF power. Activate the circuit breaker which
supplies power to the transmission system. Move the small switch on the panel of the T30000 to the
ST BY position (advised). Switch on the three phase equipment to check for correct rotation of the
three phase cooling fans. In the case of the T30000, if the connection of the three phases is correct, 3
seconds after switch-on, the UNDER PRESSURE indicator, located on the front panel, will go out.
WARNING! If the phases are not correctly connected, carry out the following procedure: SWITCH
OFF the main circuit breaker of the electrical installation so as to remove electrical power from the
whole transmission system. Remove the rear panel of the T30000 to access the terminal connector
block. Invert two of the phases. If other equipment has to be reconnected, consult their respective
technical manuals. Close the rear panel of the T30000 and all other transmission equipment. Switch on
the installation's main circuit breaker. Switch on the power on/off switches of all the transmitter
components of the system. At this point the T30000 is ready to operate and follows the following start-
up sequence: the following front panel indicators will light: ON, TIMER ACTIVITY, ST BY (if
selected), UNDER PRESSURE (for about 3 seconds) and ERRATIC V.F. (for about 10 seconds).
Each stage of the system has a start-up sequence and only when concluded will that stage operate at
radio frequency. The modulator will remain inactive until the start-up phase of all the system
equipment is concluded. After about 300/400 seconds the TIMER ACTIVITY indicator, located on
the front panel of the T30000 "final" amplifier will go out. This signifies that the pre-heating cycle of
the thermionic tube's filament has ended. Move the switch on the front panel of the T30000 to the
H.T. position; the ST BY indicator will now go out, the H.T.1 indicator will light and, after about a
second, the H.T.2 indicator will also light. When all the components of the transmission system have
concluded their respective initial phases, the modulator is also enabled. The modulator has its own
preliminary phase; when this has terminated, the whole transmission system is ready for the frequency
tuning operations. All other components of the transmission system, both active and passive must be
tuned before the T30000 amplifier is ready for frequency tuning. It is essential that the modulator, in
the first phase, is adjusted for zero power output when it concludes its preparatory cycle (for other
equipment, consult the technical manual supplied).