750W Outdoor TWT Amplifier
for Satellite Communications
D BS- Band
The VZU-6998VY
750 Watt TWT Medium
Power Amplifier
— high efficiency in an
environmentally sealed
compact package
designed for outdoor
Easy to Maintain
Provides 750 watts of power in a rugged and
compact weatherproof package, digital ready,
for wideband, single- and multi-carrier satellite
service in the 17.3-18.4 GHz frequency band.
Ideal for transportable and fixed earth
station applications.
Modular design and built-in fault diagnostic
capability via remote monitor and control.
Cost Effective and Efficient
Mounting at the antenna improves performance
through minimized cable losses and saves cost in
system design. Employs a high efficiency, dualdepressed collector helix traveling wave tube,
reducing operating costs.
Global Applications
Meets International Safety Standard EN-60215,
Electromagnetic Compatibility 89/336/EEC and
Harmonic Standard EN-61000-3-2 to satisfy
worldwide requirements.
Worldwide Support
Backed by over three decades of satellite
communications experience, and CPI’s worldwide
24-hour customer support network that includes
fifteen regional factory service centers.
Designed and built to survive in extremely
adverse environmental conditions and features
increased cooling margin for longer life.
Simple to Operate
User-friendly microprocessor-controlled logic
with integrated RS422/485 computer interface.
Digital metering, pin diode attenuation and
optional integrated linearizer for improved
intermodulation performance.
811 Hansen Way
P.O. Box 51625, Palo Alto, CA 94303
tel: +1 (650) 846-3803
fax: +1 (650) 424-1744
e-mail: [email protected]
750W Outdoor TWT Amplif ier
Plays in the Rain
DBS - B a n d
Electrical (continued)
17.3 to 18.4 GHz
Output Power
750 W min. (58.75 dBm)
630 W min. (58.00 dBm)
1100 MHz
70 dB min. at rated power
75 dB min. at small signal
RF Level Adjust Range
0 to 30 dB typ.
• Integral Linearizer
• Remote Control Panel
• Redundant and Hybrid
Power Combined Systems
• Integrated switch control
and drive (1:1 or 1:2)
Gain Stability
At constant drive & temp.
Over temp., constant drive
±0.25 dB/24hr max.
(after 30 min. warmup)
±1.0 dB over oper. temp. range (typical)
Small Signal Gain Slope
±0.02 dB/MHz max.
Small Signal Gain Variation
Across any 80 MHz band
Across the 1100 MHz band
1.0 dB pk-pk max.
4.0 dB pk-pk max.
Input VSWR
1.3:1 max.
Output VSWR
Continuous operation
Full spec compliance
Operation without damage
Residual AM, max.
Power Factor
0.95 min.
Inrush Current
200% max.
Environmental (Operating)
Ambient Temperature
-40°C to +55°C operating,
including solar loading;
-40°C to +75°C non-operating
100% condensing
1.3:1 max.
Shock and Vibration
20 G peak, 11 msec, 1/2 sine;
2.1 G rms, 5 to 500 Hz.
Any value
Acoustic Noise
68 dBA (as measured at 3 ft.)
Heat Dissipation
2000 W max.
-50 dBc below 10 kHz
-20 [1.5 +log F(kHz)] dBc,
10 kHz to 500 kHz
-85 dBc above 500 kHz
2.5°/dB max. for a single-carrier at
8 dB below rated power
Harmonic Output
-60 dBc at rated power,
second and third harmonics
Noise and Spurious
<-150 dBW/4 kHz, below 12.75 GHz
<-65 dBW/4 kHz, 17.3 to 18.4 GHz
<-105 dBW/4 kHz, 18.9 to 26.0 GHz
<-125 dBW/4 kHz, 26.0 to 40.0 GHz
-24 dBc or better with two equal carriers
at total output power level 7 dB
(4 dB with optional integral linearizer)
below rated single-carrier output
not up in the air
Note: Specifications may change without notice as a result of additional data or product refinement.
2.3 kVA typ.
2.5 kVA max.
10,000 ft. with standard adiabatic
derating of 2°C/1000 ft., operating;
50,000 ft., non-operating
For more detailed information, please refer to the corresponding CPI Technical Description.
MKT 194, ISSUE 1
Power Consumption
Single phase, 200-240 VAC ±10%
47-63 Hz
AM/PM Conversion
Please contact CPI before using this information for system design.
Primary Power
0.01 ns/MHz linear max.
0.001 ns/MHz sq. parabolic max.
0.5 ns pk-pk ripple max.
Relative Humidity
Phase Noise
IESS Phase Noise Profile
10 dB below mask
AC fundamentals
-36 dBc (IESS-308 by 6dB)
Sum of spurs (370 Hz to 1 MHz) -47 dBc
Certificate Number: 30515
Group Delay
(in any 80 MHz band)
Cooling (TWT)
Forced air with integral blower
RF Output Connection
WR-62 waveguide flange,
grooved, threaded UNC 2B 6-32
RF Output Monitor
Type SMA female
Dimensions (W x H x D)
14.5 x 13.1 x 24 in.
(368 x 333 x 610 mm)
87 lbs (39.5 kg) max.