500W Compact High Power Amplifier
for Satellite Communications
The VZU-6995AY
500 Watt TWT High
Power Amplifier—
high efficiency in a
compact package.
Easy to Maintain
Provides 500 watts of power in a 5 rack unit
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 where space and prime
power are at a premium.
Modular design and built-in fault diagnostic
capability with convenient and clearly visible
indicators for easy maintainability in the field.
Employs a high efficiency dual-depressed
collector helix traveling wave tube backed by
many years of field-proven experience in
airborne and military applications.
Worldwide Support
Backed by over three decades of satellite
communications experience, and CPI’s worldwide
24-hour customer support network that includes
twenty regional factory service centers.
Simple to Operate
User-friendly microprocessor-controlled
logic with integrated computer interface.
Digital metering, pin diode attenuation and
optional integrated linearizer for improved
intermodulation performance.
Global Applications
Meets International Safety Standard EN-60215,
Electromagnetic Compatibility 2004/108/EC
and Harmonic Standard EN-61000-3-2 to satisfy
worldwide requirements.
811 Hansen Way
P.O. Box 51625, Palo Alto, CA 94303
tel: +1 (650) 846-3803
fax: +1 (650) 424-1744
e-mail: satcommarketing@cpii.com
500W Compact High Power Amplif ier
DBS - B a n d
17.3 to 18.4 GHz
Output Power
500 W min. (56.99 dBm min.)
407 W min. (56.10 dBm min.)
1100 MHz
70 dB min. at rated power, 88 dB max.
(75 dB min. at 7 dB backoff)
78 dB min. at small signal, 90 dB max.
RF Level Adjust Range
0 to 20 dB (via PIN diode attenuator)
• Integral Linearizer
• Remote Control Panel
Gain Stability
At constant drive & temp.
• Redundant and Power
Combined Subsystems
Electrical (continued)
Over temp., constant drive
(any frequency)
Small Signal Gain Slope
Small Signal Gain Variation
Across any 80 MHz band
Across the 1100 MHz band
Across the 1100 MHz band,
with linearizer
±0.25 dB/24hr max.
(after 30 min. warmup)
±1.0 dB over oper. temp. range (typical)
±0.75 dB over ±10°C (typical)
±0.02 dB/MHz max.
1.30:1 max.
Output VSWR
1.30:1 max.
Continuous operation
Full spec compliance
Operation without damage
Any value
2.5°/dB max. for a single-carrier at
8 dB below rated power
200% max.
Environmental (Operating)
Ambient Temperature
-10° to +50°C operating
-40° to +70°C non-operating
Relative Humidity
95% non-condensing
10,000 ft. with standard adiabatic
derating of 2°C/1000 ft., operating;
50,000 ft., non-operating
Shock and Vibration
Designed for normal transportation
environment per Section 514.4
MIL-STD-810E. Designed to
withstand 20G at 11 ms
(1/2 sine pulse) in non-operating
Cooling (TWT)
Forced air with integral blower
Rear air intake & exhaust
Maximum external pressure loss
allowable: 0.5 inches water column
RF Input Connection
Type SMA female
RF Output Connection
WR-62 waveguide flange,
grooved, threaded UNC 2B 6-32
RF Output Monitor
Type SMA female
19 x 8.75 x 24 in.
(483 x 222 x 610 mm)
95 lbs (43 kg) max.
Spurious Output
<-65 dBW/4 kHz, 17.3 to 18.4 GHz
(<-60 dBW/4 kHz, with linearizer);
<-150 dBW/4 kHz, 10.9 to 12.7 GHz
For more detailed information, please refer to the corresponding CPI Technical Description.
Note: Specifications may change without notice as a result of additional data or product refinement.
Please contact CPI before using this information for system design.
0.95 min.
Inrush Current
-60 dBc max. at rated power,
second and third harmonics
Certificate Number: 30515
Power Factor
Harmonic Output
-21 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
Single phase, 208-240 VAC ±10%
47-63 Hz
2.3 kVA typ. (small signal)
2.8 kVA max.
Dimensions (W x H x D)
0.01 ns/MHz linear max.
0.001 ns/MHz sq. parabolic max.
0.5 ns pk-pk ripple max.
Power Consumption
6.0 dB pk-pk max.
Phase Noise
phase noise profile
-6 dB
AC fundamentals related
-36 dBc
Sum of spurs (370 Hz to 1 MHz) -47 dBc
Primary Power
1.0 dB pk-pk max.
4.0 dB pk-pk max.
Input VSWR
AM/PM Conversion
Group Delay
(in any 80 MHz band)
Heat and Acoustic
Heat Dissipation
2,000 Watts max.
Acoustic Noise
68 dBA (as measured at 3 ft.)
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