Amplifier Research 250TR7Z5G18
Microwave Amplifier, 7.5 - 18 GHz, 250W

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Product Overview

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The Amplifier Research (AR) 250TR7z5G18 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 250TR7z5G18 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, heater current, heater voltage, baseplate temperature and cabinet temperature.

The modular design of the AR 250TR7z5G18 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 AR 250TR7z5G18 Amplifier is designed for 19 inch rack mounting, offers four side mounted carry handles, plus non-slip feet for bench top use. The AR 250TR7z5G18 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 250TR7z5G18 Amplifier include:

• Power (fundamental), CW, @ Output Flange:
• Nominal: 280 watts
• Minimum: 250 watts
• Flatness:  ±12 dB maximum
• 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 fold back 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.
• Noise Power Density: Minus 70 dBm/Hz maximum, Minus 72 dBm/Hz typical
• Harmonic Distortion: Below 10 GHz, minus 5 dBc maximum, minus 7 dBc typical 10-12 GHz, minus 8 dBc maximum, minus 12 dBc typical, Above 12 GHz, minus 20 dBc maximum, minus 30 dBc typical
• Primary Power: 190-260 VAC, 50/60 Hz single phase, 2.5 KVA maximum
• Connectors:
• RF input: Type N precision female on rear panel
• RF output: Type WRD –750D24 waveguide flange on rear panel
• RF output sample port: Type N precision female on rear panel
• GPIB: IEEE-488 (f) on rear panel
• Interlock: DB-15 (f) on rear panel
• Cooling: Forced air (self-contained fans), air entry and exit in rear.