Atec Amplifier-Research-120S1G3 - Manual

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worldwide • rf/microwave instrumentation 062706
160 School House Road Souderton, PA 18964-9990 • 215-723-8181 • www.ar-worldwide.com
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Model 120S1G3,
M1 through M9
120 Watts CW
0.8–3.0GHz
The Model 120S1G3 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 120S1G3, when used with a sweep generator, will provide a minimum of 120 watts of RF power.
The Model 120S1G3 is equipped with a Digital Control Panel (DCP) which provides both local and remote
control of the amplifier. The DCP uses a digital 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, internal/external
automatic level control (ALC) with front panel control of the ALC threshold, pulse input capability and RF output
level protection. Also included is an internal RF detector which provides an output for use in self-testing or
operational modes.
All amplifier control functions and status indications are available remotely in GPIB / IEEE-488 and RS232
format. The buss interface connector is 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.
The low level of spurious signals and linearity of the Model 120S1G3 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.
0
20
40
60
80
100
120
140
160
180
200
220
240
OUT
P
UT
POWE
R (Wa
tts
)
10
20
30
40
50
60
70
3RD ORDER INTERCEPT POINT (dBm)
0.5 1 1.5 2 2.5 3 3.5
FREQUENCY (GHz)
120S1G3
Typical Performance
LINEAR @ 3dB COMPRESSION
LINEAR @ 1dB COMPRESSION
3RD ORDER INTERCEPT POINT