MSDC Satellite Communications Klystrons CPI Canada is offering the latest in Satcom klystron technology, MSDC – Multi Stage Depressed Collector – klystrons. These klystrons are available for C and Ku-band commercial satellite uplink services. The MSDC klystron enables the same high output power capability as the standard klystrons but offers higher operating efficiencies dramatically reducing prime input power costs. Unmatched Efficiency Typical MSDC Power Consumption versus Standard Klystron Using technology that has been successfully Prime Power Input employed for many years for UHF klystrons in the RF Output MSDC Standard MSDC Power * Savings 0 600 2500 3500 4100 6600 9000 9000 9000 5500 4900 2400 broadcast industry and for TWT’s in the microwave industry, CPI is extending this cost-saving technology to microwave klystrons. All power levels are measured in Watts For digital traffic, many satellite earth stations * Significantly more power savings if Beam Voltage is reduced. require much lower RF output power. However, on some occasions, satellite earth stations still require CPI Satcom Klystron amplifiers with high RF output capability to Power Consumption at 100 Watts Output overcome severe atmospheric conditions. 10.0 The MSDC klystrons are designed to meet both depressed collector klystron offering significantly higher operating efficiencies at lower RF output powers. However, for the rarer occasions when teleports have to burn through severe rain fade conditions, the MSDC klystrons can still offer the KiloWatts requirements. The MSDC klystron is a four stage 7.5 5.0 2.5 0.0 Standard Full Voltage same higher output power capability ensuring that MSDC Full Voltage MSDC Power Saver the transmission is never compromised. MSDC Klystron VKC2503B VKC2505B VKC2500B VKC2504A VKU2501A VKU2501B VKU2502A STD Equiv. Bandwidth Spec. Freq. Klystron MHz(-1dB) Range GHz VKC7936R VKC2486A VKC2489B VKC7980B VKU7820A VKU2455B VKU2454A 45 40 45 80 85 85 85 5.828 – 6.448 6.700 – 7.220 5.723 – 6.725 5.810 – 6.450 13.98 – 14.52 13.68 – 14.52 12.75 – 13.25 Output Power kW (min.) 3.35 3.0 3.35 3.0 2.5 2.5 2.2 Other Models available. Contact CPI Canada for details. MSDC Klystron Benefits Utilizing four-stage collector depression, the MSDC klystrons offer collector efficiencies on the order of 60%. For DC conditions and lower RF operating points, this translates into significant power savings. For the satellite earth station, the benefits are smaller electrical distribution systems and UPS requirements. With collector depression, the collector heat dissipation is much less reducing the required cooling airflow. This enables smaller AC systems and increased power savings, especially in hot, humid environments. Lower collector temperatures are key to enhancing the life of klystrons. Past experience has shown that high temperatures can compromise the normal klystron life expectancy. The low peak temperatures of the MSDC klystron means good reliability and long life. Typical C-Band Operating Parameters Typical Ku-Band Operating Parameters Typical Operation Typical Operation Heater Voltage Heater Current Beam Voltage Beam Current Collector Voltages Collector Currents Body Current RF Input Power RF Output Power Gain 6.0V 6.1 8.7kV 1.09A 0kV, 2.9kV, 5.8kV, 8.7kV =<1.1 Adc 5mA 200mW 3.35kW 41dB Physical Characteristics Mounting Position RF Input Connector RF Output Connector Focusing Electrical Connectors Weight Dimensions Collector Airflow Pressure Drop Heater Voltage Heater Current Beam Voltage Beam Current Collector Voltages Collector Currents Body Current RF Input Power RF Output Power Gain 6.5V 4.2A 8.6kV 1.06A 0kV, 2.8kV, 5.7kV, 8.6kV =<1.06A 7mA 30mW 2.50kW 49dB Physical Characteristics Collector Up Mates with Coaxial type “N” Plug, YG-21D/U or equivalent Waveguide CPR 137 Flange Permanent Magnet H.T. Connector 100 lb/45kg See outline drawing 3.0 inches Water at 750lb/hour (340 kg/hr), or less. Mounting Position RF Input Flanges Collector Up Mates with UG-419/U RF Output Flange Focusing Electrical Connectors Weight Dimensions Collector Airflow Pressure Drop Mates with UG-419/U Permanent Magnet H.T. Connector 80 lb/36kg See outline drawing 1.0 inch Water at 750lb/hour (340 kg/hr), or less. Klystron Type Output Power KW (min.) Bandwidth MHz (- 1dB) Spec. Freq. Range GHz (Centre Freq.) VKC2500B 3.35 45 5.723 – 6.725 VKU2501A 2.5 85 13.98 – 14.52 VKU2501B 2.5 85 13.68 – 14.52 VKU2502A 2.2 85 12.75 – 13.25 VKC2503B 3.35 45 5.828 – 6.448 VKC2504A 3.0 80 5.810 – 6.450 VKC2505B 3.0 40 6.700 – 7.220 Other models available. Contact CPI Canada for details. 7.385 ± 0.30 7.385 ± 0.30 High Voltage Connection 4.33 - 0.060 9.17 ± .06+ 0.060 RF Input Flange Mates with UG419/U 15.80 4.38 4.86 RF Input Flange Mates with UG419/U For complete information on the MSDC klystrons and other CPI klystrons used in satellite communications, please contact your local CPI office, or CPI Canada Inc. Communications & Power Industries Canada, Inc. 45 River Drive / Georgetown, Ontario / Canada L7G 2J4 HOT LINE TELEPHONE: 1-800-267-JETSAT TEL: 905-877-0161 / FAX: 905-877-5327 E-MAIL: [email protected] / WEB: www.cpii.com/cmp