AR 2000W1000D, Руководство по эксплуатации и обслуживанию

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Model 2000W1000D
2 Rev B
The driver amplifier also contains two switching power supplies. The input voltage range to the power
supplies is 120–240 VAC, 50-60Hz, selected automatically. The AC input power, combined for these two
supplies is approximately 700 watts.
PS1 is a multiple output supply. The main +24 volts DC supplies voltage to the RF low level A1 and A2
overdrive sense board. The +12 volts DC is for operating the cooling fans and the –12 volts DC is supplied
to the A1, A4 and A5 RF modules. Primary AC circuit protection is provided by the circuit breaker in the
Power Entry Module.
PS2 is a +23 volt, 44S switching power supply that supplies the drain voltage to driver modules A4 and A5.
The 2000W1000D cabinet also contains a 3-phase power distribution unit 200-240 VAC, 50 amp, 50/60Hz.
This allows the driver amplifier and the 500 watt amplifiers to operate from one power source.
1.4 PROTECTION CIRCUITS
Features incorporated into this unit include RF output level protection circuits, thermal protection circuits,
and internal DC level sensing and monitoring circuits that sense the voltage on each of the final and driver
amplifier modules. There is protection for the AC main circuit. All switching supplies are short circuit
protected. Reaching a threshold of either of the RF forward (incident) or reverse (reflected) power limit
adjustments, which are adjusted to approximately 2400 watts and 1500 watts respectively, will initiate
limiting, or smooth drive level fold-back, in a low-level stage of the amplifier chain. If the limiting circuits
cannot keep the amplifier’s levels below the limit threshold, the protection circuits will invoke a shutdown of
the main power supplies and low-level driver in the amplifier. Power amplifier modules are monitored for
both over-current and under-current. A RESET function is provided to permit re-powering of the amplifier in
case of transient or temporary activation of the amplifier’s protection circuitry. The low-level driver and
output amplifier subassemblies are thermally monitored.
The digital control panel monitors all fault signals, stores and displays any that are invoked and asserts the
required action.
1.5 INSTALLATION
Before proceeding, thoroughly inspect the amplifier for signs of physical damage that may have been
incurred during shipment and completely read the following installation and operating instructions, paying
special attention to all
CAUTION
notes.
1.5.1 Location
Select an operating location that will permit air to circulate freely around the amplifier’s cabinet. The
Model 2000W1000D utilizes air cooling and should be located where the normal flow of air into or exiting
from the unit will not be restricted, diverted, or re-circulated through the unit itself; in particular, the flow of
warm air exiting the rear of the amplifier should not be impeded.
Do not position the unit next to a wall or other equipment that would restrict the flow of air into the bottom
of the unit or out of the rear of the unit.