Rev B
1
1. DESCRIPTION
AND
SPECIFICATIONS
This manual provides operating, interfacing and selected service information pertinent to AR
Worldwide Model 500T8G18 Broadband Microwave Amplifier. The Model 500T8G18 is a 500 watt I/J
band traveling-wave tube amplifier (TWTA).
This manual supports models offering three phase and
single phase operation, as well models offering additional special features. Refer to the model
specification sheet to determine the applicable features of
this
unit.
1.1 TWTA
DESCRIPTION
The amplifier uses a broadband traveling-wave “supertube” assembly that consists of two traveling wave
tubes (TWTs) that are power combined to provide 500 watts minimum output over the amplifier's full
bandwidth. The amplifier is well suited for susceptibility and general laboratory testing where moderate
harmonic levels instantaneous bandwidth and high gain are required.
For bench top use the amplifier is supplied in an enclosure with integral carrying handles.
The amplifier is completely self-contained. It is packaged in two sub units: a power supply/control module
that is housed in a standard 19 inch rack cabinet 8.75 inches high, and an RF power unit (the supertube) that is
housed in a rack cabinet 5.25 inches high. They are interconnected by low voltage and high voltage cable
assemblies.
Primary power is 208 volts (±10%) 50/60 Hz., three-phase, five-wire or alternatively depending upon Model
190-260VAC single-phase 50/60 Hz. An efficient switching power supply design provides minimum power
consumption. In addition, TWTs are provided with dual collectors to minimize prime power consumption. A
fast regulation control loop and a high degree of filtering ensure performance within specifications over a
wide range of operating conditions. The amplifier is fully enclosed, and the upper and lower panels of the
enclosures are interlocked to reduce the likelihood of accidental contact with high voltage.
1.2 SUGGESTED
APPLICATIONS
•
RF Susceptibility testing
•
Antenna and component testing
•
Equipment calibration
•
General laboratory instrumentation
1.3 SPECIFICATIONS
Refer to the Amplifier Research Data Sheet at the end of this section for detailed specifications.
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