250 W and 320 W TWT Amplifiers
RF Output Power From 7.5 to 18.0 GHz
4RU TWTA provides minimum of 225 W at the flange.
Ultra-wide band, automatic fault recycle, user friendly
microprocessor-controlled logic with integrated computer
interface, VSWR soft-fail protection, digital metering, and
quiet operation for the laboratory environment.
Utilized dual-depressed collector helix traveling wave tube
for maximum 1.5 kVA operation.
Global Applications
230 VAC operation. Meets International Safety Standard
EN61010 and Electromagnetic Compatibility 2004/108/EC.
Model VZM-6993J5
250 watt and 320 W M-band TWTA
for EMC/EMI Test Applications
•Input isolator (-1 dB gain)
•Remote control panel
•115 VAC external step-up transformer
Worldwide Support
Modular design and built-in fault diagnostic capability,
backed by CPI’s worldwide 24-hour customer support
network that includes more than twenty regional factory
service centers.
45 River Drive
Georgetown, Ontario, Canada L7G 2J4
+1 (905) 702-2228
+1 (905) 877-5327
Specifications 250 W and 320 W M-Band TWTAs
Model VZM-6993J5
8.0 to 18.0 GHz
Select 7.5 to 18.0 GHz or 8.0 to 18.0 GHz
Output Power (min.), TWT
320 W CW
250 W CW
Output Power (min.), Flange
250 W CW
225 W CW
10.0 GHz
53.5 dB min. at rated power output; 53.5 dB typ. at small signal
RF Level Adjust Range
0 to 20 dB continuous
Gain Stability
±0.25 dB/24 hr max. (after 30 minute warmup and at constant drive and temperature)
Gain Variation
12 dB pk-pk typ. over 10.0 GHz bandwidth
2.5:1 typ, 1.5:1 max. with optional input isolator
2.5:1 max.
1.5:1 max. full spec compliance; 2.0:1 max. continuous operation; any value without damage
Residual AM
-50 dBc below 10 kHz; -20[1.3 + log F (kHz)] dBc, 10 kHz to 500 kHz; -85 dBc above 500 kHz
Phase Noise
Meets IESS 308/309 with 3 dB margin
Noise and Spurious
-50 dBc typ. excluding harmonics
Harmonic Content
-3 dBc typ. at lower band edge, decreasing to -15 dBc typ. at upper band edge
Prime Power
220 to 240 VAC single phase ±10%, 2 wire, 47 to 63 Hz
Power Consumption
1.4 kVA typ, 1.5 kVA max.
Inrush Current
Operating Temperature
-10°C to +40°C (-40°C to +70°C non-operating)
Relative Humidity
95% non-condensing
Operating Altitude
10,000 ft above sea level (3,048 m), with standard adiabatic de-rating of 2° per 1,000 feet; 40,000 ft non-operating
Shock and Vibration
Designed to meet conditions normally encountered in the laboratory
Acoustic Noise
65 dBA max. at three feet from amplifier
Forced air with integral blower. Rear air intake and exhaust.
Input RF Connector
Type N Female
Output RF Connector
RF Power Monitors
Type N Female
19” W x 7” H x 24.0” L (483 x 178 x 610 mm)
75 lbs (34.1 kg) max.
Meets EN61010
Quality Management
System - ISO 9001:2008
For more detailed information, please refer to the corresponding CPI technical description if one has been
published, or contact CPI. Specifications may change without notice as a result of additional data or product
refinement. Please contact CPI before using this information for system design.
MKT 227, ISSUE 5 dated OCT 2015
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