The Varian CPI VZU-6995-F35F is a Ku-Band traveling wave tube amplifier (TWTA) engineered for satellite communication earth stations in both transportable and fixed installations. This high-power amplifier delivers optimized RF performance with integrated control logic and diagnostics to streamline operation and field maintenance. Built on decades of CPI RF engineering heritage, the unit combines proven TWTA technology with modern system integration.
Technical Specifications
RF Performance
• Frequency Band: Ku-Band
• Small Signal Gain Slope: ±0.015 dB/MHz to ±0.04 dB/MHz maximum
• Small Signal Gain Variation (80 MHz band): 1.0 dB pk-pk maximum
• Small Signal Gain Variation (broader bands): 2.5 dB to 4.0 dB pk-pk maximum with linearizer
• Input VSWR: 1.3:1 maximum
• Output VSWR: 1.3:1 maximum
• Load VSWR: Full compliance to 1.5:1; continuous operation to 2.0:1
• AM/PM Conversion: 2.5 degrees/dB maximum
• Harmonics: −60 dBc
• Intermodulation: −24 dBc to −22 dBc maximum
• Group Delay Linear: 0.01 ns/MHz maximum
• Group Delay Parabolic: 0.001 ns/MHz² maximum
• Group Delay Ripple: 0.5 ns pk-pk maximum
Power & Thermal
• AC Input: 100–240 VAC universal
• Power Factor: 0.95 minimum
• Inrush Current: 200% maximum
• Power Consumption: 1.3 kVA to 2.8 kVA typical/maximum
• Heat Dissipation: 1100 W to 2000 W maximum
Physical & Environmental
• Weight: 43 kg to 45.4 kg maximum
• Dimensions: 19 × 8.75 × 25 inches (483 × 222 × 635 mm) rack mount
• Cooling: Forced air with integral blowers
• Acoustic Noise: 68 dBA at 3 ft.
– Key Features
• Switchable gain adjustment with up to 20 dB range
• Optional linearizer for reduced AM/PM distortion and flatter gain response
• Compact 19-inch rack-mount form factor
• Universal AC mains compatibility eliminates regional supply constraints
– Typical Applications
• Satellite uplink amplification in Ku-Band earth stations
• Fixed and transportable VSAT ground terminals
• Backup and primary RF amplification in teleport facilities
– Compatibility & Integration
The unit integrates into standard 19-inch rack systems and operates across standard universal AC mains (100–240 VAC). Forced-air cooling with integral blowers supports continuous operation in controlled indoor environments.
