Amplifier Research 40T4G18 TWT Amplifier 4.2 GHz – 18 GHz 40W
Description
Amplifier Research 40T4G18 is a self contained, forced air cooled, broadband traveling wave tube (TWT) microwave amplifier designed for applications where low harmonic content is required in sub-band ranges and where wide instantaneous bandwidth, high gain and moderate power output are required. A reliable TWT provides a conservative 40 watts minimum at the amplifier output connector, 30 watts in low harmonic modes. 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 IEEE- 488 (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. With the 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 40T4G18 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.
Features
- Broadband
- Forced air cooled
- Digital display
- AM, FM or pulse modulation
- IEEE-488 (GPIB) interface
- VSWR protection
- Gain control
- 0 dBm input
- RF output Sample ports
- Auto sleep
Specifications
|
POWER (fundamental), CW, @ OUTPUT CONNECTOR |
|
|
Nominal |
40 watts |
|
Minimum |
40 watts, 30 watts in low harmonic mode |
|
Linear @ 1dB Compression |
10 watts minimum |
|
FLATNESS |
±10 dB maximum, 4.2 – 18 GHz |
|
FREQUENCY RESPONSE |
4.2-18 GHz instantaneously or one of three selectable sub-bands in low harmonic mode |
|
INPUT FOR RATED OUTPUT |
1.0 milliwatt maximum |
|
GAIN (at maximum setting) |
46 dB minimum |
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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 |
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MISMATCH TOLERANCE |
Output power foldback protection at reflected power exceeding 20 watts (13 watts in low harmonic mode). 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. |
|
MODULATION CAPABILITY |
Will faithfully reproduce AM, FM, or pulse modulation appearing on the input signal. AM peak envelope power limited to specified power. |
|
NOISE POWER DENSITY |
Minus 80 dBm/Hz (maximum) Minus 90 dBm/Hz (typical) |
|
HARMONIC DISTORTION (in user selectable sub-band at 30 watts) |
Minus 20 dBc maximum Minus 30 dBc typical |
|
HARMONIC DISTORTION (full band at 40 watts) |
4.2-4.5 GHz; Minus 2.5 dBc maximum, Minus 0 dBc typical 4.5-6.0 GHz; Minus 0.5 dBc maximum, Minus 1 dBc typical 6.0-8.0 GHz; Minus 4 dBc maximum, Minus 6 dBc typical 8.0- 10.0 GHz; Minus 6 dBc maximum, Minus 9 dBc typical Above 10 GHz; Minus 10 dBc maximum, Minus 15 dBc typical |
|
PRIMARY POWER |
99-260 VAC 50/60 Hz single phase 800 VAC maximum |
|
CONNECTORS |
|
|
RF input |
Type N precision female on rear panel |
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RF output |
Type N precision female on rear panel |
|
RF output sample port |
Type N precision female on rear panel |
|
GPIB |
IEEE-488 (f) |
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Interlock |
DB-15 female on rear panel |
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COOLING |
Forced air (self contained fans), air entry and exit in rear. |
|
SIZE (W x H x D) |
50.3 x 26 x 68.6 cm, 19.8 x 10 x 27 in. |
|
WEIGHT (approximate) |
39 kg, 85 lbs. |
