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Preamplifiers
Detect and strengthen a signal prior to greater amplification.
See Also: Amplifiers, RF Amplifiers, Current Amplifiers, Audio Amplifiers, Voltage Amplifiers, Transconductance Amplifiers, Op Amps, Klystron, Instrumentation Amplifiers, Distribution Amplifiers
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JFET Voltage Preamplifier
SIM910
Stanford Research Systems, Inc.
The SIM910 and SIM911 are low-noise, programmable preamplifiers which are ideal for a wide range of small signal applications. The primary differences between the two models are their input impedance and input noise.
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Microphone Preamplifier
HT426E01
Nominal Microphone Diameter1/2Frequency Response Electrical Noise(at 22 C) (Flat 20 Hz to 20 kHz)Distortion (3 V rms input at 1 kHz)<-70 dB<-70 dB[1] EnvironmentalTemperature Range (Operating)-40 to +248 FExcitation Voltage 20 to 32 Constant Current Excitation 2 to 10 mA
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Programmable Current Preamplifier
99539
The Model 99539 is a modular, multi-channel current preamplifier with parallel, logic level, gain control input. It consists of circuit boards which plug into a 3 1/2" high by 19" wide rack chassis.
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Universal Preamplifier 14
UP14
For Two Dimensional Magnetic Recording (TDMR) and Heat-assisted Magnetic Recording (HAMR) Headamplifiers. Universal Preamplifier 14 (UP14) is designed for TDMR and HAMR Head Amplifiers. With new Guzik RWA4000 TDMR, UP14 allows to process signals from three Read Channels. It also supports two high speed data channels for Write data and Laser data. UP14 has two channels for dynamic TFC control and allows to program TFC power per sector and close loop TFC power control in each channel. UP14 can generate two programmable modulation signals for write data and laser data with bandwidth up to 20 MHz. UP14 consist of two boards. The first UP14 RW Board processes high-frequency signals: read-back signals, write data and laser data. The second UP14 Control Board provides power, control and low-frequency signal generation: TFC, write data modulation and laser modulation.
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FieldFox Handheld Microwave Spectrum Analyzer, 9 GHz
N9935B
A lightweight, durable, microwave spectrum analyzer, interference analyzer, distance-tracking generator, preamplifier, power meter, and more.
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Low Noise Current Preamplifier
SR570
Stanford Research Systems, Inc.
The SR570 is a low-noise current preamplifier capable of current gains as large as 1 pA/V. High gain and bandwidth, low noise, and many convenient features make the SR570 ideal for a variety of photonic, low temperature and other measurements.
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Microphones
All these measurement microphones have a XLR connector and require a phantom power. They can be connected to specially equipped soundcards or pre-amplifiers, only.
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BJT Voltage Preamplifier
SIM911
Stanford Research Systems, Inc.
The SIM910 and SIM911 are low-noise, programmable preamplifiers which are ideal for a wide range of small signal applications. The primary differences between the two models are their input impedance and input noise.
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Read-Write Analyzers
Guzik Read/Write Analyzers (RWA) work in conjunction with Spinstands to write data to the disk media and read back the signal for detailed analysis. We have two RWA-4000 series available for For Two Dimensional Magnetic Recording (TDMR) and non-TDMR technologies. The RWA 4000 series offer upto 8Gbit/sec maximum write data rate and 3.5 GHz analog bandwidth for all parametric measurements. Each RWA features a pattern generator with 1psec resolution of bit pre-compensation and supports PRML chip integration. Servo writing and processing is provided for Guzik Spinstand models. Select the pre-amplifier (UP14) as well as a variety of enhancements including programmable filters and PRML chip adapters.
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Ultra Low Noise Preamp
J2180A
The J2180A low noise preamplifier provides a fixed, AC coupled 20dB gain while converting a 1 MOhm input impedance to a 50 Ohm output impedance. With a 3dB bandwidth of 0.1Hz to 100MHz, the preamplifier improves the sensitivity of oscilloscopes, network analyzers and spectrum analyzers while reducing the effective noise floor and spurious response. The preamplifier can also serve as a low frequency DC blocker for a spectrum analyzer or you can use it to connect a high input impedance oscilloscope probe to 50 Ohm equipment.
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ELT STALKER Vector-finder
VF-121
The Vector-Finder Types VF-121 and VF 121A are unique in the Vector-finder series of direction finding antennas. They incorporate a proven design, electro statically shielded loop sensing element with modern solid state low noise analog and digital technology to allow detection and location of aircraft band signals. Both the VF-121 and the VF 121A incorporate a unique digital modulator which allows the user to more easily home-in on unmodulated carriers. Such cases occur at airports when transmitter may be accidentally keyed on during aircraft overnight layovers. The VF-121 is specifically designed to be used on airport premises where signal strengths are high. To compensate for very strong signals, an integral attenuator is also incorporated to allow the user to operate the unit close-in to aircraft. The VF-121A differs in that a high gain, low-noise preamplifier is utilized with the sensing element in order to hunt signals that may be weak or at a distance. The unit is ideally suited for the location of ELT transmitters in the field. Both units are tunable over the 118 MHz to 130 MHz aircraft frequencies and interface directly to the user’s aircraft band receiver or transceiver via the antenna jack. With the antenna system connected to the receiver, the user will hear the desired signal. If the signal is unmodulated, the digital modulator will generate a tone on the carrier. When the handheld unit is rotated about, an audible null on the received signal or the generated tone will be heard. This null aligns with the axis of the equipment case and represents the direction of the received signal. This direction may be read from the black dial compass mounted on the top of the enclosure. As the response is bi-directional, triangulation may be used to determine the true bearing when the true direction is not known.
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Low Cost Microwave Wideband APD Preamp Receivers
MR11 (40KHz~18GHz)
Hangzhou Huatai Optic Tech. Co., Ltd.
MR11 series microwave wideband optical receiver, adopts high Sensitivity APD diode and Low Noise Preamplifier IC, within bandwidth of 40KHz~18GHz, they are featured with excellent linearity, high responsibility and superior flatness of the RF response in both, power and phase. They provide an outstanding linearity fiber optical communication for analogue wideband microwave application. Due to avoidance of using expensive coaxial cable or wave-guide, there will be no limitation in transmission distance, which improves the signal quality and reliability of the microwave communication. They can be widely applied in microwave communication system such as remote wireless, timing and reference signal distribution, telemetry, measurement and delay line etc as well as 10Gb/s high speed communication system.
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Low Noise Pre-Amplifiers
Low Noise Pre-Amplifier and companion external low noise amplifier (LNA) are used to amplify low level microwave signals. The Pre-Amplifier contains an AC/DC power supply, internal low noise amplifier, and a bias tee to source a DC bias voltage on the RF input connector.To overcome cable loss between the test antenna and the Pre-Amplifier assembly, a remote low noise amplifier (LNA) is mounted directly onto the 10 GHz antenna. A bias tee inside the Pre-Amplifier chassis powers the remote LNA through the coax cable interconnecting the pre-amplifier and the 10 GHz test antenna.
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Precision Current Preamplifier
SIM918
Stanford Research Systems, Inc.
The SIM918 Current Preamplifier is ideal in applications in which the input offset voltage must be kept to a minimum. The DC voltage difference between the two inputs (current input and voltage bias) is accurately measured every 2 seconds, and is nulled.
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Low Cost Microwave Wideband PIN Preamp Receivers
MR21 (40KHz~18GHz)
Hangzhou Huatai Optic Tech. Co., Ltd.
MR21 series microwave wideband optical receiver, adopts High linear PIN diode and Low noise pre-amplifier IC, within bandwidth of 40KHz~18GHz, they are featured with excellent linearity, high responsibility and superior flatness of the RF response in both, power and phase. They provide an outstanding linearity fiber optical communication for analogue wideband microwave application. Due to avoidance of using expensive coaxial cable or wave guide, there will be no limitation in transmission distance, which improves the signal quality and reliability of the microwave communication. They can be widely applied in microwave communication system such as remote wireless, timing and reference signal distribution, telemetry, measurement and delay line etc as well as 10Gb/s and 18Gb/s high speed communication system.
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Lock-In Voltage Preamplifier
SR552
Stanford Research Systems, Inc.
The SR552 Voltage Preamplifier is designed to work with SRS lock-in amplifiers, providing gain where it is needed most?right at the experiment. The preamplifier minimizes noise and pickup in the connecting lines and can reduce measurement time in noise-limited experiments.
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Preamplifier
The UBBV series are external, extremely low-noise broadband preamplifiers that can be mounted to any SPECTRAN spectrum analyzer. They are ideally suited for spectrum analyzers and oscilloscopes as well as antennas of all manufacturers and are supplied with extensive accessories.
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TURBO-TENNA 137 MHz Weather Satellite Antennas
WX-137 SERIES
The WX-137 series of antennas are marine-grade 137 MHz circularly polarized antennas designed to receive weather satellite images from the polar orbiting NOAA and Meteor satellites. Manufactured from stainless steel and ABS plastics, the assemblies are sealed and designed to survive marine service, although they may be used on land as well. Each antenna is available with or without a gasfet preamplifier which provides about 16 dB of gain and is physically located adjacent to the antenna.
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Multiplexed Amplifier-per-Channel Function Card
Multiplexed amplifier-per-channel systems have a dedicated pre-amplifier for every channel and a single Analog to Digital Converter, ADC, for the system. Amplified and filtered analog signals are multiplexed to a post-amplifier and then presented to the ADC to be digitized. Significant benefits of the multiplexed amplifier-per-channel system are: Higher Throughput Rates, Improved Filtering, Higher Per Channel Sampling Rate, Sensor Isolation, Improved Channel-To-Channel Isolation
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Preamplifier, 10 MHz to 4 GHz
87405B
Preamplifiers and System Noise Figure Application Note This note discusses noise figure basics including applications and characteristics of Keysight simplifier technology. Highlighted are Keysight's 87405C portable preamplifiers that provide an exceptional gain of 25 dB up to 18 GHz and a probe-power bias connection which eliminates the need for an additional DC power supply. Read the Preamplifiers and System Noise Figure Application Note now!
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C-Band Single Channel Pre-Amplifier EDFA (SPA)
HSA4300 (With SNMP)
Hangzhou Huatai Optic Tech. Co., Ltd.
Huatai HSA4300 series is a low noise pre-EDFA which designed specifically for single wavelength optic transmission system. It is installed in the front of optical receiver, used for improving the receiving sensitivity of the optical receiver, and extending the signal transmission distance.
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X-Ray Preamplifier Power Supply
The X-ray Preamplifier Power Supply (XPPS) provides power for 50 or more preamplifiers. The 19-inch rack-mount or benchtop unit contains linear power supplies that generate +/-12V @ 5.1 Amperes and +/-24V @ 3.6 Amperes, with very little noise.
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Active broadband antenna up to 6GHz
Series HyperLOG ® 70 X
Compatible with any Spectrum Analyzer or Oscilloscope. Incl. High-End Preamplifier. Ultra high gain (44dBi). The HyperLOG X LogPer antenna series can be used to locate extremely weak signals, thanks to the integrated preamplifier. The antenna offers excellent directional characteristics which can be optimized using the optional Laser and Compass.
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External Pre-amplifiers
Although all Spectrum A/D cards have a very powerful input section with a highly configurable input amplifier and a variety of input ranges it is sometimes necessary to have additional external amplifiers if the signal to acquire has an extremely low level. Spectrum offers a range of perfectly matching external amplifiers to cover such cases. These powerful amplifiers have been rated using the Spectrum cards and offer best performance together with high amplification rates.The amplifiers are simply connected between the signal source and the Spectrum A/D card input and can be manually switched between different settings using small lever keys. All amplifiers allow the offset compensation by using an adjustable screw.
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DC to 350 MHz Preamplifier
SR240A
Stanford Research Systems, Inc.
The model SR240A 350 MHz Preamplifier is a 4-channel, DC-coupled instrument with a gain of 5 per channel. The amplifiers can be used independently or cascaded to provide gains of 5, 25, 125 or 625.
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Preamplifier
2721
Pre-amplification is required to protect the output signal of pH and ORP electrodes from a wide variety of electromagnetic interferences common in industrial environments. Signet 2721 is used if remote pre-amplification is required (e.g. tank temperature >80oC) or connecting another manufacturer's electrode to the Signet 5700 or 8750 instrument. The Signet 2721 should be used with special order sensors built with cables (Signet models 277X-HT or 277X-1-HT).
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Breakout Module
PXI-PDM
The PXI Preamplifier Power and Trigger Breakout Module (PXI PDM) is an accessory for the Pixie-4 system.
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Energy Probes
RjP-700 Series
The RjP-700 Series probes are designed to measure lower pulse repetition rate, longer duration pulses - up to 1msec pulse width at a maximum rep rate of 40Hz. This allows for measurement of pulsed flashlamps and other sources not possible with other probes. The combination of large area detector surface and long pulse width allow for measurements up to several Joules total energy. Integrated preamplifiers allow for longer probe-to-instrument cable runs, useful for manufacturing environments.
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USB Preamplifier, 2 to 50 GHz
U7227F
The U7227F, 2 to 50 GHz USB preamplifier is designed to bring reliable gain and low noise figure to measurement systems improving the overall system performance and reduce systematic errors; a total solution to the X-Series signal analyzers to perform noise figure measurement