The Model 20ST1G18A is a self contained, forced air cooled, broadband hybrid solid state and traveling wave tube (TWT) microwave amplifier designed for applications where wide instantaneous bandwidth, high gain and moderate power output are required.
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POWER (fundamental), CW, @ OUTPUT CONNECTOR
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FLATNESS
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FREQUENCY RESPONSE
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INPUT FOR RATED OUTPUT: 1.0 milliwatt maximum
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GAIN (at maximum setting): 43 dB minimum
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GAIN ADJUSTMENT (continuous range)
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INPUT IMPEDANCE: 50 ohms, VSWR 2.0:1 maximum
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OUTPUT IMPEDANCE: 50 ohms, VSWR 2.5:1 typical
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MISMATCH TOLERANCE: 100% of rated power without foldback from 0.8 – 4.2 GHz. Output power foldback protection above 4.2 GHz at reflected power exceeding 20 watts. 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.
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MODULATION CAPABILITY: Will faithfully reproduce AM, FM, or pulse modulation appearing on the input signal. AM peak envelope power limited to specified power.
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NOISE POWER DENSITY (from 4.2 – 18 GHz)
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HARMONIC DISTORTION (at 20 watts)
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0.8–4.2 GHz, Minus 20 dBc maximum, Minus 30 dBc typical
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4.2-4.5 GHz; Minus 0 dBc maximum, Minus 1 dBc typical
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4.5-5 GHz; Minus 1 dBc maximum, Minus 2 dBc typical
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5-7 GHz; Minus 2.5 dBc maximum, Minus 4 dBc typical
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7-10 GHz; Minus 5 dBc maximum, Minus 9 dBc typical
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10-12 GHz; Minus 8 dBc maximum, Minus 12 dBc typical
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Above 12 GHz; Minus 20 dBc maximum, Minus 30 dBc typical
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PRIMARY POWER
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99-260 VAC
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50/60 Hz single phase
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700 VA maximum
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CONNECTORS
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RF input: Type N precision female on rear panel
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RF output: Type N precision female on rear panel
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RF output sample port: Type N precision female on rear panel
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GPIB: IEEE-488 female
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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.
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