CPI VZX-6981K4

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.
Model #
VZC-6961K4
VZX-6981K4
VZU-6991K4
VZM-6991K4
VZV-2776K4
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
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
4.0 to 18 GHz (see Selection Guide)
Rated Output Power
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).
Small Signal Gain
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.
Gain Stability
0.25 dB/day at constant drive and temperature.
Gain Variation
10 dB peak-to-peak (typical), except M-Band 15 dB (typical)
Impedance
50 Ohms nominal
VSWR
Input:
Output:
Load:
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.
Noise & Spurious
-50 dBc typical excluding harmonics and residual modulation
Residual AM
-40 dBc
Residual FM
Less than 4 kHz peak-to-peak in any 5 MHz band
AM/PM Conversion
2.5/dB typical at 6 dB below rated output
Noise Figure
35 dB max.
Harmonic Content
-3 dBc at lower band edge decreasing to -15 dBc (typical) at upper band edge without optional
harmonic filter.
Meters, Monitors, Controls & Indicators
Meters
Helix Current, Filament Elapsed Time (Option H)
Monitors
Output Sample Port (Option E)
Controls
• Mains Power ON/OFF
• High Voltage ON/OFF and/or Fault Reset,
• Local/Remote (Option G)
• RF Attenuator (Option B)
Indicators
• Mains Power ON
• Operate/Standby
• Summary Fault
• Current Fault (TWT Helix)
Mechanical & Environmental
Ambient Temperature
0 to +40°C
Relative Humidity
95% non-condensing
Altitude
6,000 feet max.
Shock & Vibration
As normally encountered in a protected engineering laboratory environment
Cooling
Forced air with integral blower, air intake from sides and rear, exhaust at rear
RF Connectors
Type N (female), Front panel (rear panel, Option J)
Prime Power
115 Vac, ±10%, 50/60 Hz, single phase; (100 and 230 Vac, Options Q and K)
Power Consumption
400 Watts
Dimensions (WxHxD)
19 x 3.5 x 19.25 inches; 480 x 89 x 487 millimeters
Weight
35 lbs./15.9 kg. (max.)
Options
A
Input Isolator: Inserted between the input and the TWT. Input VSWR is reduced to less than 1.5:1.
B
Input RF Attenuator: 20 dB continuous variation of RF gain. This attenuator is connected after the input isolator.
C
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
Attenuation
(Typical)
0.95
1.00
0.35 dB to 18 GHz
0.35 dB to 8 GHz
0.45 dB to 18 GHz
3 dB
30 dB
60 dB
1.05
1.20
1.35 and above
D
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.
E
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.
F
Chassis Slides
G
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
Elapsed Time Meter
J
Rear RF Connectors
K
230 Vac Mains Prime Power
L
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.
Q
100 Vac Mains Prime Power
U
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
4-8
Pwr Gain
8-12.4
Pwr Gain
12.4-18
Pwr Gain
8-18
Pwr Gain
4-18
Pwr Gain
Option Description
A
Input Isolator
–
0.6
–
1.0
–
0.6
–
0.6
B
RF Gain Adjust
–
1.0
–
1.0
C
Harmonic Filter
0.45 0.45
0.45
0.45
0.45
0.45
D
Output Isolator
0.6
0.6
0.6
0.6
0.6
0.6
E
RF Sample Port
0.4
0.4
0.4
0.4
0.6
J
Rear Connector
0.4
0.4
0.5
0.5
0.6
–
0.6
–
2.5
–
1.5
–
1.0
0.45
0.45
–
N/A
0.6
0.6
–
N/A
0.6
0.5
0.5
0.8
0.8
0.6
0.6
0.6
0.6
0.6
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.
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Outline Drawing
satcom
division
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
IAMP12 03/04