Tektronix Encore

Amplifier Research 250T8G18
Microwave Amplifier, 7.5 - 18 GHz, 250W

Amplifiers - RF and Microwave >> Above 1 GHz and 101 Watt to 999 Watt >> Microwave Amplifier, 7.5 - 18 GHz, 250W
Rent Used Test Equipment
Manufacturer: Amplifier Research
Model: 250T8G18

Amplifier Research 250T8G18 Microwave Amplifier, 7.5 - 18 GHz, 250W

Electronic Test and Measurement Equipment

Amplifier Research 250T8G18 Microwave Amplifier, 7.5 - 18 GHz, 250W Product Datasheet Download Product Datasheet

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Product Overview

RENT AR 250T8G18 (call for availability)

The Amplifier Research (AR) 250T8G18 is a self contained, forced air cooled, broadband traveling wave tube (TWT) microwave amplifier designed for applications where instantaneous bandwidth and high gain are required. A reliable TWT provides a conservative 250 watts minimum at the amplifier output flange. Stated power specifications are at the fundamental frequency.

The AR 250T8G18 Amplifier's front panel digital display shows forward and reflected output plus extensive system status information accessed through a series of menus via soft keys. Status indicators include power on, warm-up, standby, operate, faults, excess reflected power warning and remote. Standard features include a built-in IEEE-488 (GPIB) interface, 0 dBm input, VSWR protection, gain control, RF output sample port, auto sleep, plus monitoring of TWT helix current, cathode voltage, collector voltage, external video pulsing, heater current, heater voltage, baseplate temperature and cabinet temperature.

The modular design of the AR 250T8G18 Amplifier's power supply and RF components allow for easy access and repair. Use of a switching mode power supply results in significant weight reduction. The external video pulsing feature reduces prime power use for pulse applications.

Housed in a stylish contemporary cabinet, the AR 250T8G18 Amplifier is designed for bench top use, but can be removed from the cabinet for rack mounting. The AR 250T8G18 Amplifier provides readily available RF power for a variety of applications in Test and Measurement, (including EMC RF susceptibility testing), Industrial and University Research and Development, and Service applications.

Features and Specifications of the AR 250T8G18 Amplifier include:

  • Power (fundamental), CW, @ Output Connector:
    • Nominal: 300 watts
    • Minimum: 250 watts
    • Linear @ 1dB Compression: 70 watts minimum
  • Flatness: ±12 dB maximum, equalized for ±5 dB maximum at rated power
  • Frequency Response: 7.5-18 GHz instantaneously
  • Input for Rated Output: 1.0 milliwatt maximum
  • Gain (at maximum setting): 54 dB minimum
  • Gain Adjustment (continuous range): 35 dB minimum
  • Input Impedance: 50 ohms, VSWR 2.0:1 maximum
  • Output Impedance: 50 ohms, VSWR 2.5:1 typical
  • Mismatch Tolerance: Output power foldback protection at reflected power exceeding 50 watts. Will operate without damage or oscillation with any magnitude and phase of source and load impedance. May oscillate with unshielded open due to coupling to input. Should not be tested with connector off.
  • Modulation Capability: Will faithfully reproduce AM, FM, or pulse modulation appearing on the input signal. AM peak envelope power limited to specified power.
  • Video Pulse Capability:
    • Pulse Width: 0.05 microseconds min
    • Pulse Rate (PRF): 100kHz max
    • RF Rise and Fall: 30 ns max (10% to 90%)
    • Delay: 300 ns max from pulse input to RF 90%
    • Pulse width distortion: ±30 ns max (50% points of output pulse width compared to 50% points of input pulse width)
  • Noise Power Density: Minus 70 dBm/Hz (maximum), Minus 72 dBm/Hz (typical)
  • Harmonic Distortion: Below 10 GHz, minus 5 dBc max., minus 7 dBc typ.10-12 GHz, minus 8 dBc max., minus 12 dBc typ. Above 12 GHz, minus 20 dBc max., minus 30 dBc typ.
  • Primary Power: 190-260 VAC, 50/60 Hz single phase, 2.5 KVA maximum
  • Connectors:
    • RF input: Type N female on rear panel
    • RF output: Type WRD –750D24 waveguide flange on rear panel
    • RF output sample port: Type N female on rear panel
    • GPIB: IEEE-488 (f) on rear panel
    • Interlock: DB-15 (f) on rear panel
    • Video: BNC-female on rear panel
  • Cooling: Forced air (self-contained fans), air entry and exit in rear.



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