Atec 500T1G2 User Manual
Model 500T1G2
M1 through M11
500 Watts CW
1GHz-2.5GHz
The Model 500T1G2 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 500 watts minimum at the amplifier output connector. Stated power specifications are
at fundamental frequency.
The 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 IEEE488 (GPIB) interface, 0dBm 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. Modular design of the power supply and RF components allow for easy
access and repair. Use of a switching mode power supply results in significant weight reduction.
Housed in a stylish contemporary cabinet, this unit is designed for benchtop use, but can be removed from the
cabinet for rack mounting. The Model 500T1G2 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.
See model configuration for primary power and package alternatives.
500T1G2 TYPICAL POWER OUTPUT
600
CW
500
400
WATTS
300
200
100
0.5 1 1.5 2 2.5 3
LINEAR @ 1dB COMPRESSION
FREQUENCY (GHz)
ar worldwide • rf/microwave instrumentation 060206
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POWER (fundamental), CW, @ OUTPUT CONNECTOR
Nominal ................................................................537 watts
Minimum ...............................................................500 watts
Linear @ 1 dB Compression ...................................125 watts minimum
FLATNESS.....................................................................±8 dB maximum, equalized for
±5 dB maximum at rated power
FREQUENCY RESPONSE ...............................................1–2.5 GHz instantaneously
INPUT FOR RATED OUTPUT ..........................................1.0 milliwatt maximum
GAIN (at maximum setting) ...........................................57 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 100 watts. Will
MODULATION CAPABILITY...........................................Will faithfully reproduce AM, FM, or pulse modulation appearing on the input
NOISE POWER DENSITY ...............................................Minus 80 dBm/Hz (maximum)
Minus 87 dBm/Hz (typical)
HARMONIC DISTORTION.............................................Minus 3 dBc maximum
Minus 4 dBc typical
PRIMARY POWER .......................................................... See Model Configurations
CONNECTORS
RF input .................................................................Type N female on rear panel
RF output ...............................................................7–16 DIN female on rear panel
RF output sample port ............................................Type N female on rear panel (Forward Power)
GPIB...................................................................... IEEE-488 (f)
Interlock ................................................................DB15 on rear panel
COOLING....................................................................Forced air (self-contained fans), air entry and exit in rear.
SPECIFICATIONS, MODEL 500T1G2
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.
signal. AM peak envelope power limited to specified power.
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