Atec 250S1G4 User Manual

Model 250S1G4,

150

170

190

210

230

250

270

290

310

330

350

370

390

410

430

450

Power (Watts)

Freq. (GHz)

MODEL 250 S1G4 TYPI CAL POWE R OUTPUT

P1dB

P3dB

Psat

M1 through M5

250 Watts CW

0.8-4.2GHz

The Model 250S1G4 is a portable, self-contained, air-cooled, broadband, completely solid-state amplifier designed for
applications where instantaneous bandwidth, high gain and linearity are required. Push-pull circuitry is utilized in all high
power stages in the interest of lowering distortion and improving stability. The Model 250S1G4, when used with a sweep

generator, will provide a minimum of 250 watts of RF power.

The Model 250S1G4 is equipped with a Digital Control Panel (DCP) which provides both local and remote control of the
amplifier. The DCP uses a graphic liquid crystal display, menu assigned softkeys, a single rotary knob, and four dedicated
switches (POWER, STANDBY, OPERATE and FAULT/RESET) 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 and RF output level protection.

All amplifier control functions and status indications are available remotely in GPIB/IEEE-488 format, RS-232 hardwire
and fiber optic, USB, and Ethernet. The bus interface connector is located on the back panel and positive control of local

or remote operation is assured by a Local/Remote switch on the front panel of the amplifier.

The low level of spurious signals and linearity of the Model 250S1G4 make it ideal for use as a driver amplifier in testing
wireless and communication components and subsystems. It can be used as a test instrument covering multiple frequency
bands and is suitable for a variety of communication technologies such as CDMA, W-CDMA, TDMA, GSM etc. It is also
suitable for EMC Test applications where undistorted modulation envelopes are desired.

The 250S1G4 has the ability to be upgraded at a later date to the Model 350S1G4, 350 watt amplifier. Upgrading to the
Model 350S1G4 allows for future upgrades by utilizing our Expandable Power Technology.

The export classification for this amplifier is 3A001. These 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.

Approved for public release by AR RF/Microwave Instrumentation 013114

160 School House Road Souderton, PA 18964-9990 • 215-723-8181 • www.arworld.us Page 1 of 3

RATED OUTPUT POWER ............................................... 250 watts minimum

INPUT FOR RATED OUTPUT .......................................... 1.0 milliwatt maximum

POWER OUTPUT @ 3dB COMPRESSION

Nominal ................................................................ 280 watts

Minimum ............................................................... 240 watts

POWER OUTPUT @ 1dB COMPRESSION

Nominal ................................................................ 240 watts

Minimum ............................................................... 200 watts

FLATNESS ..................................................................... ±2.0 dB typical

±2.5 dB maximum

FREQUENCY RESPONSE ............................................... 0.8-4.2GHz instantaneously

GAIN (at maximum setting) ........................................... 54 dB minimum

GAIN ADJUSTMENT ..................................................... 15 dB minimum

INPUT IMPEDANCE ...................................................... 50 ohms, VSWR 2.0:1 maximum

OUTPUT IMPEDANCE ................................................... 50 ohms nominal

MISMATCH TOLERANCE* ............................................. 100% of rated power without foldback. Will operate without damage or oscillation

*See Application Note #27

MODULATION CAPABILITY ........................................... Will faithfully reproduce AM, FM, or pulse modulation appearing on the input

HARMONIC DISTORTION............................................. Minus 20 dBc maximum at 225 watts

THIRD ORDER INTERCEPT POINT .................................. 64 dBm typical

RF POWER DISPLAY ...................................................... Digital, forward and reflected

PRIMARY POWER ......................................................... 120-240VAC

50/60 Hz, single phase
1450 watts
CONNECTORS

RF Connectors ....................................................... See Model Configurations

Safety interlock ...................................................... 15 pin female subminiature D on rear panel

Remote computer interface ..................................... IEEE-488 (GPIB)& RS-232 connector on rear panel

Remote Computer Interface (Fiber Optic) ................ ST Conn Tx and Rx RS-232

Operate Interface................................................... RJ-11 on rear panel

USB 2.0 ................................................................. Type B

Ethernet ................................................................. RJ-45

IEEE-488 (GPIB) INTERFACE & RS-232 ........................... Allows control and monitoring of all front panel controls except keylock position

COOLING ................................................................... Forced air (self contained fans)

EXPORT CLASSIFICATION ............................................. 3A001

SPECIFICATIONS, MODEL 250S1G4

with any magnitude and phase of source and load impedance.

signal.

control

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