Atec 300T2G8 User Manual
Model 300T2G8,
M1 through M19
300 Watts CW
2.5GHz–7.5GHz
The Model 300T2G8 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 300 watts minimum at the amplifier output connector. Stated power specifications are
at the 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, 0 dBm input, VSWR protection, gain control, external video pulsing, 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. The external video pulsing feature reduces prime
power use for pulse applications.
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 300T2G8 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 package alternatives and special features.
300T2G8 TYPICAL POWER OUTPUT
500
CW
400
300
WATTS
LINEAR @ 1dB COMPRESSION
200
100
2 3 4 5 6 7 8
FREQUENCY (GHz)
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POWER (fundamental), CW, @ OUTPUT CONNECTOR
Nominal ................................................................350 watts
Minimum ...............................................................300 watts
Linear @ 1 dB Compression ...................................75 watts minimum
FLATNESS.....................................................................±12 dB maximum, equalized for ±5 dB maximum at rated power
FREQUENCY RESPONSE ...............................................2.5-7.5 GHz instantaneously
INPUT FOR RATED OUTPUT ..........................................1.0 milliwatt maximum
GAIN (at maximum setting) ...........................................55 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 60 watts. Will
MODULATION CAPABILITY...........................................Will faithfully reproduce AM, FM, or pulse modulation appearing on the input
VIDEO PULSE CAPABILITY
Pulse Width............................................................0.05 microseconds min
Pulse Rate (PRF)......................................................100 kHz max
RF Rise and Fall......................................................30 ns max (10 % to 90%)
Delay.....................................................................300 ns max from pulse input to RF 90%
Pulse Width Distortion.............................................± 30 ns (50% points of output pulse width compared to 50% point of input pulse
NOISE POWER DENSITY
(pulse on) ..............................................................Minus 85 dBm/Hz (maximum); Minus 90 dBm/Hz (typical)
(pulse off) ..............................................................Minus 140 dBm/Hz (typical)
HARMONIC DISTORTION.............................................Minus 3.0 dBc maximum, Minus 4.5 dBc typical
PRIMARY POWER ..........................................................190-260 VAC
50/60 Hz single phase
3.0 KVA maximum
CONNECTORS
RF input .................................................................Type N female on rear panel
RF output ...............................................................Type N female on rear panel
RF output sample port ............................................Type N female on rear panel
GPIB...................................................................... IEEE 488 (f) on rear panel
Interlock ................................................................DB-15 (f) on rear panel
Video.....................................................................BNC-female on rear panel
COOLING....................................................................Forced air (self contained fans), air entry and exit in rear.
SPECIFICATIONS, MODEL 300T2G8
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.
width)
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