Calibration Business Division

10000TP8G10 – Travelling Wave Tube Amplifiers

The Model 10000TP8G10 is a self contained, forced air cooled, broadband traveling wave tube (TWT) microwave amplifier designed for pulse applications at low to moderate duty factors where instantaneous bandwidth and high gain are required. A reliable TWT subsystem provides a conservative 10,000 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 6000 watts (nominal) microwave tubes that are factory matched in gain and phase to offer moderate harmonic levels without added filters. 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.

AR also offers a broad range of amplifiers for CW (Continuous Wave) applications. See Model Configurations for alternative packaging, and special features.

Key Specifications

POWER (Fundamental), Peak Pulse, @ Output: Nominal, 11000 watts; Minimum, 10000 watts
FLATNESS: ±6 dB maximum
INPUT FOR RATED OUTPUT: 1.0 milliwatt maximum
GAIN (at maximum setting): 70 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 5000
Pulse Width 0.07 – 40 microseconds.
Pulse Rate (PRF) 100 kHz maximum
Duty Cycle 4% maximum.
RF Rise and Fall 30 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
Pulse Off Isolation 80 dB minimum, 90 dB typical
Pulse Input TTL level, 50 ohm nominal