Amplifier Research 7400TP4G8 Pulse Amplifier 4 GHz – 8 GHz 7400W

Description

Amplifier Research 7400TP4G8 is a self contained, forced air cooled, broadband traveling wave tube (TWT) microwave amplifier system designed for pulse applications at low to moderate duty factors where instantaneous bandwidth and high gain are required. Reliable TWT subsystems provide a conservative 7400 watts minimum peak RF pulse power at the amplifier output connector. Stated power specifications are at the fundamental frequency.

The amplifier's front panel digital display shows forward and reflected average power output or forward and reflected peak power, 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 average or peak reflected power warning and remote. Standard features include a built-in IEEE-488 (GPIB) interface, 0dBm input, TTL Gating, VSWR protection, gain control, RF output sample ports, auto sleep, plus monitoring of TWT helix current, cathode voltage, collector voltage, heater current, heater voltage, baseplate temperature and cabinet temperature. Modular design of the power supply and RF components allow for easy access and repair. Use of switching mode power supplies results in significant weight reduction.

The rated power is developed by efficiently power combining the outputs from two 4500 watts (nominal) pulse TWTs that are factory matched in gain and phase, resulting in an excellent combination of wide instantaneous bandwidth with improved harmonic levels.

Housed in a stylish contemporary cabinet, the amplifier provides readily available pulsed RF power for a variety of applications in Test and Measurement, (including EMC RF pulse susceptibility testing), Industrial and University Research and Development, and Service applications.

 

Features

  • Broadband
  • Forced air cooled
  • Digital display
  • Pulse Modulation
  • IEEE-488 (GPIB) interface
  • VSWR protection
  • Gain control
  • RF output Sample ports
  • Auto sleep
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Specifications

POWER (Fundamental), Peak Pulse, @ Output

Nominal

10,000 watts

Minimum

7,400 watts

FLATNESS

±10 dB maximum, ±5 dB at rated power

FREQUENCY RESPONSE

4 – 8 GHz

INPUT FOR RATED OUTPUT

1.0 milliwatt maximum

GAIN (at maximum setting)

69 dB minimum

GAIN ADJUSTMENT (continuous range)

35 dB minimum

INPUT IMPEDANCE

50 ohms, VSWR 2.5:1 maximum

OUTPUT IMPEDANCE

50 ohms, VSWR 2.5:1 typical

MISMATCH TOLERANCE

Output pulse width foldback protection at peak reflected power exceeding 4,000 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.

PULSE CAPABILITY

Pulse Width

0.2 – 50 microseconds.

Pulse Rate (PRF)

100 kHz maximum

Duty Cycle

4% maximum.

RF Rise and Fall

35 ns max (10% to 90%).

Delay

300 ns maximum from pulse input to RF 90%

Pulse Width Distortion

±30 ns maximum (50% points of output pulse width compared to 50% points of input pulse width)

Pulse Off Isolation

80 dB minimum, 90 dB typical

Pulse Input

TTL level, 50 ohm nominal termination

NOISE POWER DENSITY

(pulse on)

Minus 65 dBm/Hz maximum; Minus 85 dBm/Hz (typical)

(pulse off)

Minus 140 dBm/Hz (typical)

HARMONIC DISTORTION

Minus 15 dBc maximum

PRIMARY POWER

208 VAC ± 10%, 3 phase, delta (4 wire) 50/60 Hz, 5 KVA maximum

CONNECTORS

RF input

Type N female on rear panel

RF output

Type WRD-350 waveguide flange on rear panel

RF output forward and reflected sample ports

Type N female on rear panel

Pulse input

Type BNC female on rear panel

GPIB

IEEE-488 female on rear panel

Interlock

DB-15 female on rear panel

COOLING

Forced air (self contained fans), air entry and exit in rear.

SIZE (W x H x D)

50.3 x 53 x 91 cm, 19.8 x 21 x 36 in

WEIGHT (approximate)

123 kg, 270 lbs

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