Tektronix Encore

Amplifier Research 125A400
RF Amplifier, 10kHz - 400MHz, 125W

Amplifiers - RF and Microwave >> 1 GHz or Less and 101 Watt to 999 Watt >> RF Amplifier, 10kHz - 400MHz, 125W
Rent Used Test Equipment
Manufacturer: Amplifier Research
Model: 125A400

Amplifier Research 125A400 RF Amplifier, 10kHz - 400MHz, 125W

Electronic Test and Measurement Equipment

Amplifier Research 125A400 RF Amplifier, 10kHz - 400MHz, 125W Product Datasheet Download Product Datasheet

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Product Overview

Rent Amplifier Research 125A400 Amplifier (Call for availability):

The Amplifier Research 125A400 is a self-contained, air-cooled, broadband, completely solid state amplifier designed for applications where instantaneous bandwidth and high gain are required. Push-pull LDMOS circuitry is utilized in all high power stages in the interest of lowering distortion and improving stability. The Amplifier Research 125A400, when used with an RF sweep generator, will provide a minimum of 125 watts of swept power.


The Amplifier Research 125A400 is equipped with a Digital Control Panel (DCP) which provides both local and remote control of the amplifier. The DCP uses a color LCD touch screen and a single rotary knob to offer status reporting and control capability. The display provides operational presentation of Forward Power and Reflected Power plus control status and reports of internal amplifier status. Special features include a gain control, pulse input capability, forward RF sample port, and a reflective RF sample port for precise power measurements.


All amplifier control functions and status indications are available remotely in GPIB/IEEE-488, RS-232, RS-232 fiber optic, Ethernet and USB format. The buss interface connectors are located on the back panel and positive control of local or remote operation is assured by a switch on the front panel of the amplifier. High efficiency universal input, power factor corrected switching power supplies provides DC to all internal sub-assemblies.


Housed in a stylish, contemporary enclosure, the Amplifier Research 125A400 provides readily available RF power for typical applications such as RF susceptibility testing, antenna and component testing, watt meter calibration, particle accelerators, plasma generation, communications and use as a driver for higher power amplifiers.


Functions and Specifications for the Amplifier Research 125A400 Amplifier Includes:


RATED OUTPUT POWER: 125 watts minimum


INPUT FOR RATED OUTPUT: 1.0 milliwatt maximum


POWER OUTPUT @ 3 dB compression

Nominal:140 watts

Minimum: 125 watts


POWER OUTPUT @ 1 dB compression

Nominal: 100 watts

Minimum: 75 watts


FLATNESS: ± 2.0 dB maximum


FREQUENCY RESPONSE: 10 kHz–400 MHz instantaneously


GAIN (at maximum setting): 51 dB minimum


GAIN ADJUSTMENT (continuous range): 20 dB minimum


INPUT IMPEDANCE: 50 ohms, VSWR 1.5:1 maximum


OUTPUT IMPEDANCE: 50 ohms, nominal


MISMATCH TOLERANCE: v100% rated power without foldback up

to 6.0:1 mismatch, above which may limit to 62.5W reflected power.

Will operate without damage or oscillation with any magnitude and

phase of source and load impedance.


MODULATION CAPABILITY: Will faithfully reproduce AM, FM,

or pulse modulation appearing on the input signal



Signal (into 50 ohms): +3.0 to 6.0 VDC


HARMONIC DISTORTION.: Minus 20 dBc maximum at 75 watts




RF POWER DISPLAY: 0–200 watts full scale


PRIMARY POWER: 85–264 VAC 47–63 Hz, 600 watts maximum

@ 0.99 P.F. typical

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