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6900K4 Series 20 Watt TWT Amplifier
Features
* 4.0 TO 18 GHz * Worldwide Support Centers * Octave Bandwidths or Greater * 24 Hour Hotline for customer support * Optional GPIB Control (800) 231- 4818 or 1-650-846-3700 * One Year Warranty (Unlimited Hours) * Meets EMC 89/336/EEC * CE marked and TUV approved to international safety standards For test and measurement applications that require RF power of 20 Watts, CPI offers the 6900K4 Series power amplifier. For testing on antenna ranges, in EMC chambers or on a test bench, CPI provides equipment built with quality and reliability that you can trust. The 6900K4 series amplifiers are constructed with proven reliable all metal-ceramic travelling wave tubes (TWTs), which are renowned for their high power and wide band capabilities. These TWTs have a wide range of applications and are readily available, resulting in CPI's ability to offer additional tubes in a timely manner. The power supply for the 6900K4 series has a calculated MTBF of more than 41,000 hours. Combined with CPI TWTs, the 6900K4 series amplifier provides the industry standard for dependability. The 6900K4 series TWT amplifier has a full line of standardized options including remote control, input and output isolators and harmonic filters. For ATE applications, IEEE 488 bus controllable amplifiers* are available, with internal GPIB cards or external modules. More than a thousand CPI 6900K4 series amplifiers are used throughout the world, performing over a wide range of specifications, in a variety of environmental and operating conditions. CPI 6900K4 series TWT amplifiers are manufactured with the same quality as all CPI amplifiers and are backed by CPI's worldwide 24-hour customer support network that includes 9 regional factory service centers. Quality, reliability and product support are integral parts of your CPI power amplifier. Power (Watts) 20 20 20 20 20 Freq (GHz) 4-8 8-12.4 12.4-18 8-18 4-18 Gain (dB) 35 40 40 40 30 O/P Conn N N N N N
Model # VZC-6961K4 VZX-6981K4 VZU-6991K4 VZM-6991K4 VZV-2776K4
For special frequency ranges and options, please contact the factory. * For models with integral IEEE 488 capability, please refer to publication MKT 45, 6900K6 Series
Specifications
Frequency Range Rated Output Power 4.0 to 18 GHz (see Selection Guide) 20 Watts CW. Saturated output power may exceed rated power by 6 dB or more near band center. Output power is reduced by the insertion loss of all microwave options added at the output. (Options C, D, E, J). 35 to 40 dB (see Selection Guide). Typically 10 to 20 dB higher near band center. Gain at Saturated Power is typically 5 dB less than small signal gain. Gain is reduced by the insertion loss of all microwave options. 0.25 dB/day at constant drive and temperature. 10 dB peak-to-peak (typical), except M-Band 15 dB (typical) 50 Ohms nominal 2.0:1 typical 2.0:1 typical 1.3:1 max. for full spec compliance, 2.0:1 max. for no damage. Any value without damage if Option D is included. -50 dBc typical excluding harmonics and residual modulation -40 dBc Less than 4 kHz peak-to-peak in any 5 MHz band 2.5/dB typical at 6 dB below rated output 35 dB max. -3 dBc at lower band edge decreasing to -15 dBc (typical) at upper band edge without optional harmonic filter.
Small Signal Gain
Gain Stability Gain Variation Impedance VSWR Input: Output: Load: Noise & Spurious Residual AM Residual FM AM/PM Conversion Noise Figure Harmonic Content
Meters, Monitors, Controls & Indicators
Meters Monitors Controls Helix Current, Filament Elapsed Time (Option H) Output Sample Port (Option E) * Mains Power ON/OFF * High Voltage ON/OFF and/or Fault Reset, * Local/Remote (Option G) * RF Attenuator (Option B) * Mains Power ON * Operate/Standby * Summary Fault * Current Fault (TWT Helix)
Indicators
Mechanical & Environmental
Ambient Temperature Relative Humidity Altitude Shock & Vibration Cooling RF Connectors Prime Power Power Consumption Dimensions (WxHxD) Weight 0 to +40C 95% non-condensing 6,000 feet max. As normally encountered in a protected engineering laboratory environment Forced air with integral blower, air intake from sides and rear, exhaust at rear Type N (female), Front panel (rear panel, Option J) 115 Vac, 10%, 50/60 Hz, single phase; (100 and 230 Vac, Options Q and K) 400 Watts 19 x 3.5 x 19.25 inches; 480 x 89 x 487 millimeters 35 lbs./15.9 kg. (max.)
Options
A B C Input Isolator: Inserted between the input and the TWT. Input VSWR is reduced to less than 1.5:1. Input RF Attenuator: 20 dB continuous variation of RF gain. This attenuator is connected after the input isolator. Harmonic Filter: Inserted after the output isolator. The amount of filtering depends upon the harmonic frequency relative to the upper band edge. Frequency Relative to upper band edge 0.95 1.00 1.05 1.20 1.35 and above D E F G Attenuation (Typical) 0.35 dB to 18 GHz 0.35 dB to 8 GHz 0.45 dB to 18 GHz 3 dB 30 dB 60 dB
Output Isolator: Inserted immediately following the TWT to isolate it from load mismatches. The result is improved gain flatness vs. frequency and protection of the TWT. The output VSWR is reduced to 1.5:1 typically. Max. is 2.0:1. RF Output Sample Port: -30 dB nominal directional coupler added at the output following the output isolator (-35 dB nominal for the VZV 2776K4). It is brought to the front panel via a Type N connector. Chassis Slides Remote Control: Rear Panel connector providing remote control of Mains Power ON/OFF, High Voltage ON/OFF - FAULT RESET and External Interlock. Mains Power ON requires +12 volts at 30 mA from an external power supply. High Voltage ON/OFF is a contact closure to ground. External Interlock is a contact closure which must be closed for the amplifier to operate. All Front Panel status indications are brought to this connector via open collector transistor outputs to ground rated at 14 Volts max. collector to emitter at 30 mA max.
H J K L Q U
Elapsed Time Meter Rear RF Connectors 230 Vac Mains Prime Power Solid State Input Pre-Amplifier: Inserted between the RF attenuator and the TWT. Raises the overall gain so that at least 0 dBm will produce rated power output. 100 Vac Mains Prime Power SMA Adapters
Note 1 The incorporation of all microwave options reduces the overall gain of the amplifier by the sum total of the insertion losses. (See Table 1.) Note 2 The incorporation of all microwave options at the output reduces the maximum power delivered to the output connector by the sum total of the insertion losses. (See Table 1.)
Table 1
Insertion Loss (dB) for Various Microwave Option Configurations Frequency Range (GHz) Loss Affects Option Description A B C D E J Input Isolator RF Gain Adjust Harmonic Filter Output Isolator RF Sample Port Rear Connector - - 0.6 0.4 0.4 0.6 1.0 0.6 0.4 0.4 - - 0.45 0.6 0.4 0.5 0.6 1.0 0.45 0.6 0.4 0.5 - - 0.45 0.6 0.6 0.6 0.6 1.0 0.45 0.6 0.6 0.6 - - 0.45 0.6 0.5 0.6 0.6 1.5 0.45 0.6 0.5 0.6 - - - - 0.8 0.6 2.5 1.0 N/A N/A 0.8 0.6 4-8 Pwr Gain 8-12.4 Pwr Gain 12.4-18 Pwr Gain 8-18 Pwr Gain 4-18 Pwr Gain
0.45 0.45
Note: Characteristics and operating values are based on performance tests. These figures may change without notice as a result of additional data or product refinement. Please contact CPI before using this information for system design.
Block Diagram
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Outline Drawing
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Communications & Power Industries Canada, Inc. 45 River Drive / Georgetown, Ontario / Canada L7G 2J4 TEL: 905-877-0161 / FAX: 905-877-5327 E-MAIL: marketing@cmp.cpii.com / WEB: www.cpii.com/cmp
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IAMP12 03/04

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