Amplifier Research 35S4G8A Solid State Amplifier 4 GHz – 8 GHz 35W

Description

Amplifier Research 35S4G8A is a solid state, self-contained, air-cooled, broadband amplifier designed for applications where instantaneous bandwidth and high gain are required. Housed in a stylish contemporary cabinet, the unit is designed for benchtop use, but can be removed from the cabinet for immediate equipment rack mounting.

The 35S4G8A, when used with a sweep generator, will provide a minimum of 35 watts of RF power. Included is a front panel gain control which permits the operator to conveniently set the desired output level.
The 35S4G8A is protected from RF input overdrive by an RF input leveling circuit which controls the RF input level to the RF amplifier first stage when the RF input level is increased above 0 dBm. The RF amplifier stages are protected from over temperature by removing the DC voltage to them if an over temperature condition occurs due to cooling blockage or fan failure. There is a digital display on the front panel to indicate the operate status and fault conditions when an overtemperature or power supply fault has occurred. The unit can be returned to operate when the condition has been cleared.

The 35S4G8A includes digital control for both local and remote control of the amplifier. The control system is composed of a 16-bit RISC microcontroller board which handles primary functions of the amplifier and interprets commands sent to it from an 8-bit remote interface board. This 8-bit microprocessor controlled board provides both IEEE-488 (GPIB) and asynchronous, full duplex RS-232 control of all amplifier functions.

The Model 35S4G8A is housed in a cabinet and designed to provide standalone performance for RF testing. It is also configured to be used as a sub-amplifier in a 60 watt, 90 watt, or 120 watt higher power amplifiers. It can be added to in an incremental fashion to become a part of these higher power units, yet still be used as a standalone 35-watt amplifier. The RF output connector must be configured to the rear panel to be used as a sub-amplifier.

 

Features

  • Broadband
  • Solid State 
  • Mismatch Tolerant
  • Modulation Capability
  • Digital Control Panel
  • Automatic Primary Power Selection
  • RF Input Leveling Circuit – Overdrive Protection
  • Over Temperature Protection
  • Standard Remote Interfaces
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Specifications

RATED POWER OUTPUT

35 watts minimum

POWER OUTPUT @ 3dB COMPRESSION

Nominal

38 watts

Minimum

32 watts

POWER OUTPUT @ 1dB COMPRESSION

Nominal

32 watts

Minimum

28 watts

FLATNESS

±1.0 dB typical

±2.0 dB maximum

FREQUENCY RESPONSE

4.0-8.0 GHz instantaneously

INPUT FOR RATED OUTPUT

1.0 milliwatt maximum, 0 dBm

GAIN (at maximum setting)

45.5 dB minimum

GAIN ADJUSTMENT (Continuous Range)

10 dB minimum (4096 steps remote)

INPUT IMPEDANCE

50 ohms, VSWR 2.5:1 maximum

OUTPUT IMPEDANCE

50 ohms, nominal

MISMATCH TOLERANCE

100% of rated power without foldback. Will operate without damage or oscillation with any magnitude and phase of source and load impedance.

MODULATION CAPABILITY

Will faithfully reproduce AM, FM, or pulse modulation appearing on the input signal

HARMONIC DISTORTION

Minus 20 dBc maximum at 35 watts

THIRD ORDER INTERCEPT POINT

54 dBm typical

PRIMARY POWER

(selected automatically)

90-132, 180-264 VAC

50/60 Hz, single phase

<550 watts maximum

CONNECTORS

RF INPUT & OUTPUT

Type N female on front panel

REMOTE INTERFACES

IEEE-488

24 pin female

RS-232

9 pin Subminiature D (female)

RS-232 (Fiber-optic)

Type ST

USB 2.0

Type B

Ethernet

RJ-45

SAFETY INTERLOCK

15 Pin Subminiature D

COOLING

Forced air (self contained fans)

SIZE (W x H x D)

50.3 x 24.9 x 54.6 cm, 19.8 x 9.8 x 21.5 in

WEIGHT (approximate)

42.6 kg (94 lbs)

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