AR 1000S1G6C, Operating And Service Manual

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Model 1000S1G6C
2 Rev A
PS3 is a single output supply. The main +24.0 volts DC supplies voltage to the Terminal Blocks to power Fan
assemblies B1 through B36.
PS4 is a single output supply. The main +24.0 volts DC supplies voltage to the Drain FETs in the A2, A3, A5,
A6, A7 and A8 Quad amplifiers.
PS5 is a single output supply. The main +24 volts DC supplies voltage to the Drain FETs in Quad modules
A21-28.
PS6 is a single output supply. The main +24 volts DC supplies voltage to the Drain FETs in Quad modules
A13-20.
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 1200 watts and 250 watts respectively, will initiate limiting, or smooth
drive level foldback, 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 1000S1G6C 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.