Amplifier Research 500A250B RF Amplifier 10 kHz – 250 MHz 500W

Description

Amplifier Research 500A250B 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 Model 500A250B, when used with an RF sweep generator, will provide a minimum of 500 watts of swept power.

The Model 500A250B is equipped with a Digital Control Panel (DCP) which provides both local and remote control of the amplifier. The DCP uses a 3.75 inch diagonal graphic display, menu assigned soft keys, a single rotary knob, and four dedicated switches to offer extensive control and status reporting 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, 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 and USB format. The bus interface connectors are located on the back panel and positive control of local or remote operation is assured by a keylock on the front panel of the amplifier. High efficiency universal input, power factor corrected switching power supplies provides DC to all internal subassemblies.

Housed in a stylish, contemporary enclosure, the Model 500A250B 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.

 

Features

  • Solid state
  • Broadband
  • Air cooled
  • Gain control
  • Push-pull LDMOS circuitry
  • Mismatch tolerant
  • Modulation capability
  • RF connector – Type N
  • Interface – IEEE-488, RS-232 & USB
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Specifications

RATED POWER OUTPUT

500 watts

INPUT FOR RATED OUTPUT

1.0 milliwatt maximum

POWER OUTPUT @ 3dB compression

Nominal

600 watts

Minimum

500 watts

POWER OUTPUT @ 1dB compression

Nominal

500 watts

Minimum

350 watts

FLATNESS

±3.0 dB maximum

FREQUENCY RESPONSE

10 kHz-250 MHz instantaneously

GAIN (at maximum setting)

57 dB minimum

GAIN ADJUSTMENT (Continuous Range)

10 dB minimum

INPUT IMPEDANCE

50 ohms, VSWR 1.5:1 maximum

OUTPUT IMPEDANCE

50 ohms, nominal

MISMATCH TOLERANCE

100% of rated power without foldback up to 6.0:1 mismatch, above which may limit 250W 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

HARMONIC DISTORTION

Minus 20 dBc maximum at 350 watts

THIRD ORDER INTERCEPT POINT

65 dBm typical

RF POWER DISPLAY

0-750 watts full scale

PRIMARY POWER

 (selected automatically)

180-264 VAC

47-63 Hz, 2500 watts maximum @ 0.99 P.F. typical

REMOTE INTERFACES

IEEE-488, RS-232, USB

CONNECTORS

RF input

Type N female on front panel

RF output

Type N female on front panel

Forward Sample

BNC female on front panel (coupling factor 60 dB typical; data supplied)

Reverse Sample

BNC female on rear (coupling factor 60 dB typical)

Safety Interlock

15 pin female Type D on rear panel

REMOTE CONTROL

IEEE-488

24 pin female on rear panel

RS-232

9 pin Subminiature D on rear panel

USB

Type B female

COOLING

Forced air (self contained fans)

SIZE (W x H x D)

50.3 x 34 x 56.9 cm, 19.8 x 13.4 x 22 in.

WEIGHT 

45.8 kg (101 lb)

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