Amplifiers
Test amplifiers increase the amplitude of a signal without altering its form or fidelity. Used in measurement, generation or stimulation chains, they reproduce precise electrical signals for functional testing and component characterisation. Their bandwidth can range from a few hertz to several megahertz, with adjustable gain and harmonic distortion of less than 0.01 %. In R&D, they are used to drive actuators, coils, piezoelectric sensors or electroacoustic devices. In metrology, they guarantee the stability and linearity of signals injected into test benches. Power models deliver several hundred watts, while broadband amplifiers ensure a uniform response over a wide range of frequencies. Overload, short-circuit and overtemperature protection ensure safe, reliable operation. Analogue, BNC or differential interfaces facilitate integration into any test environment.
This is an essential link for faithfully reproducing signals and guaranteeing the accuracy of electrical tests.
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9100-TABOR
TABOR ELECTRONICS
Single-channel signal amplifier with high-voltage output.
11975A
KEYSIGHT / AGILENT / HP
Microwave amplifier 2 to 8GHz, output adjustable from +6 to +16dBm.
50W1000B
AMPLIFY RESEARCH
50 W RF amplifier, 1 to 1000 MHz, 47 dB gain, GP-IB programmable.
SR830
STANFORD RESEARCH SYSTEMS
Dual-phase digital synchronous sense amplifier with GP-IB and RS-232 interfaces.
SR865A
STANFORD RESEARCH SYSTEMS
Digital synchronous detection amplifier 1 mHz to 4 MHz.
83051A
KEYSIGHT / AGILENT / HP
Ultra-wideband microwave amplifier from 45 MHz to 50 GHz with 23 dB gain.
83020A
KEYSIGHT / AGILENT / HP
Compact Microwave amplifier from 2 to 26.5 GHz with 30 dB gain.
87405C
KEYSIGHT / AGILENT / HP
RF preamplifier 100MHz to 18GHz, gain 25dB, flatness (+/-) 1.5dB.
25S1G4A
AMPLIFY RESEARCH
Microwave amplifier, 25 W, 0.8 to 4.2 GHz, GP-IB programmable as an option.
30S1G3
AMPLIFY RESEARCH
Microwave amplifier 30 W, 0.8 to 3 GHz, GP-IB programmable option.
30W1000A
AMPLIFY RESEARCH
RF amplifier 25 to 1000 MHz, 30 W, programmable as an option.
concrete questions about Amplifiers
01
What is the purpose of an amplifier in a test and measurement environment?An amplifier increases the power or amplitude of a signal in order to drive a load, excite a circuit, compensate for losses or carry out functional tests. It is used to inject a controlled signal into a device to validate its behaviour under electrical or RF constraints.
02
What is the difference between a power amplifier and a signal amplifier?A power amplifier provides a high current or voltage to drive energy-hungry loads or components. A signal amplifier is more concerned with fidelity: it increases amplitude without degrading the waveform, which is essential for sensitive analogue signals or RF tests.
03
What parameters are essential when choosing an amplifier?Bandwidth, output power, input and output impedance, distortion, noise, thermal stability, ability to handle complex loads and overload protection. The choice depends on the type of signal: audio, high-precision analogue, RF or pulse.
04
In what areas are test and measurement amplifiers used?In power electronics, to drive motors or converters; in RF to excite antennas, modules or radio circuits; in R&D to analyse the behaviour of devices subjected to amplified signals; in materials testing to apply controlled electrical stimulation.
05
Is refurbishing a good idea for amplifiers?Yes, subject to strict controls: linearity, bandwidth, harmonic distortion (THD), thermal stability, overload protection and power rating tests. Reconditioned amplifiers remain reliable if the output stages, thermal dissipation and internal protections are checked according to rigorous procedures.
