Amplifier Research 75A250A, Руководство пользователя

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Model 75A250A Manual Text
1-1
REV A
SECTION I
GENERAL INFORMATION
1.1 G
ENERAL
D
ESCRIPTION
The Amplifier Research (AR) Model 75A250A is a self-contained, broadband Radio Frequency (RF)
amplifier designed for laboratory applications where instantaneous bandwidth, high gain, and moderate
power output are required. Solid state technology is used exclusively to offer significant advantages in
reliability and cost. When used with a frequency-swept signal source, the AR Model 75A250A will
provide 75 watts of swept power output from 10KHz to 250 megahertz (MHz). Typical applications
include antenna and component testing, wattmeter calibration, electromagnetic interference (EMI)
susceptibility testing, use as a driver for frequency multipliers and higher power amplifiers, and use as an
RF energy source for Magnetic Resonance Imaging (MRI) studies. The Model 75A250A can be
operated locally by using the unit’s front panel controls, or remotely by using its built-in IEEE-488 or RS-
232 interfaces.
1.2 P
OWER
S
UPPLIES
The Model 75A250A contains two switching power supplies. The input voltage range to these power
supplies is 90–132 Volts Alternating Current (VAC) and 180–264 VAC, 50/60Hz, universal or
automatically selected. The user does not have to switch or change anything on the Model 75A250A
when changing the unit’s AC input voltage. The unit’s AC power consumption is 400 watts nominal. A
built-in circuit breaker provides primary AC circuit protection.
1.3 S
PECIFICATIONS
Refer to the “Amplifier Research Data Sheet” on the following pages for detailed specifications.
All voltage measurements referenced in this manual are Direct Current (DC) unless stated otherwise.