Atec 500A250B User Manual
Model 500A250B,
M1 through M10
500 Watts CW
10kHz–250MHz
The Model 500A250B is a self-contained, air-cooled, broadband, completely solid state amplifier designed for
applications where instantaneous bandwidth and high gain are required. Push-pull LDMOS circuitry is utilized in all high
power stages in the interest of lowering distortion and improving stability. The Model 500A250B, when used with an RF
sweep generator, will provide a minimum of 500 watts of swept power.
The Model 500A250B is equipped with a Digital Control Panel (DCP) which provides both local and remote control of the
amplifier. The DCP uses a 3.75 inch diagonal graphic display, menu assigned softkeys, a single rotary knob, and four
dedicated switches to offer extensive control and status reporting capability. The display provides operational presentation
of Forward Power and Reflected Power plus control status and reports of internal amplifier status. Special features include
a gain control, forward RF sample port, and a reflective RF sample port for precise power measurements.
All amplifier control functions and status indications are available remotely in GPIB/IEEE-488, RS-232 and USB format.
The buss interface connectors are located on the back panel and positive control of local or remote operation is assured
by a keylock on the front panel of the amplifier.
High efficiency universal input, power factor corrected switching power supplies provides DC to all internal subassemblies.
Housed in a stylish, contemporary enclosure, the Model 500A250B provides readily available RF power for typical
applications such as RF susceptibility testing, antenna and component testing, watt meter calibration, particle accelerators,
plasma generation, communications and use as a driver for higher power amplifiers.
800
500A250B Typical Power Output
700
600
500
P1dB
P3dB
400
300
200
100
0
0.001 0.01 0.1 1 10 100
Approved for public release by AR RF/Microwave Instrumentation 081712
160 School House Road Souderton, PA 18964-9990 • 215-723-8181 • www.arworld.us Page 1 of 3
RATED OUTPUT POWER ............................................... 500 watts
INPUT FOR RATED OUTPUT .......................................... 1.0 milliwatt maximum
POWER OUTPUT @ 3 dB compression
Nominal ................................................................ 600 watts
Minimum ............................................................... 500 watts
POWER OUTPUT @ 1 dB compression
Nominal ................................................................ 500 watts
Minimum ............................................................... 350 watts
FLATNESS ..................................................................... 3.0 dB maximum
FREQUENCY RESPONSE ............................................... 10 kHz–250 MHz instantaneously
GAIN (at maximum setting) ........................................... 57 dB minimum
GAIN ADJUSTMENT (continuous range) ......................... 10 dB minimum
INPUT IMPEDANCE ....................................................... 50 ohms, VSWR 1.5:1 maximum
OUTPUT IMPEDANCE ................................................... 50 ohms, nominal
MISMATCH TOLERANCE ............................................... 100% rated power without foldback up to 6.0:1 mismatch, above which may
MODULATION CAPABILITY ........................................... Will faithfully reproduce AM, FM, or pulse modulation appearing on the input
HARMONIC DISTORTION ............................................. Minus 20 dBc maximum at 350 watts
THIRD ORDER INTERCEPT POINT .................................. 65 dBm typical
RF POWER DISPLAY ...................................................... 0–750 watts full scale
PRIMARY POWER .......................................................... 180 - 264 VAC
47–63 Hz, 2500 watts maximum @ 0.99 P.F. typical
CONNECTORS
RF input ................................................................. See Model Configuration
RF output ............................................................... See Model Configuration
Forward Sample ..................................................... BNC female on front panel (coupling factor 60 dB typical; data supplied)
Reverse Sample ...................................................... BNC female on front panel (coupling factor 60 dB typical)
Safety Interlock ....................................................... 15 pin female Type D on rear panel
REMOTE CONTROL
IEEE-488 ............................................................ 24-pin female on rear panel
RS-232 .............................................................. 9 pin female Type D on rear panel
USB ................................................................... Type B female
COOLING .................................................................... Forced air (self contained fans)
WEIGHT, maximum ...................................................... See Model Configurations
SIZE (W x H x D) ............................................................ See Model Configurations
EXPORT CLASSIFICATION ............................................. EAR99. The export classification for this equipment is EAR99. These
SPECIFICATIONS, MODEL 500A250B
limit to 250W reflected power. Will operate without damage or oscillation with
any magnitude and phase of source and load impedance.
signal
commodities, technology or software are controlled for export in accordance
with the U.S. Export Administration Regulations. Diversion contrary to U.S. law is
prohibited.
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