Amplifier Research 75A250A Manual - Halaman 3

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Model 75A250A

1.1

ENERAL

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.

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

OWER

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

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.

SECTION I

GENERAL INFORMATION

Manual Text

The Model 75A250A can be

1-1

REV A