Showing results: 121 - 132 of 132 items found.
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FB7-NX -
National RF, Inc
In about 1935, the National Radio Company of Malden, Mass., brought out a “hot” high frequency receiver, called the FB7, and the subsequent FB-7X. It featured a super-hetrodyne design with plug-in coils that gave it a broad frequency range. The “X” model also incorporated a crystal filter in the intermediate frequency section, thus giving it additional selectivity. The receiver was viewed by radio amateurs as a technological breakthrough, and it was also used commercially for point to point high frequency communications. As the receiver did not have an internal RF amplifier section, a separately tunable RF amplifier was later provided in a separate enclosure for additional performance capabilities. Now, National RF, Inc., is resurrecting the fabled receiver name with an all solid-state, hot mini receiver, which also utilizes plug-in coils to cover the HF spectrum. The mini-receiver is designed for use by radio amateurs as well as serious short-wave listeners, and allows reception of AM, CW, and SSB signals. It incorporates a super-hetrodyne design with a dual gate FET built-in RF preamplifier and a ceramic filter for selectivity, often required when used in a crowded amateur radio band. In addition, the receiver has a buffered rear panel output of the high frequency oscillator for use with either a frequency counter for exact receive frequency display, or for interface with an outboard transmitter. A rear panel jack is also provided for muting the receiver when a transmitter is placed into the transmit mode. And, the receiver is small enough to fit into carry-on luggage and taken on trips when it is desired to “keep an ear” on amateur radio or other high frequency activity. The receiver utilizes rear panel plug-in coil assemblies which contain the RF amplifier, mixer, and oscillator tuned circuits. Each plug-in coil assembly also comes with a separate dial scale, which is inserted onto the front panel for displaying the tuned frequency. A very smooth 6 to 1 planetary drive is used for tuning the receiver. Other front panel controls include RF preamplifier peak, volume control, Beat Frequency Oscillator adjustment, and RF gain control. Other switches include filter bandwidth, AM/CW/SSB selection, Power, and a general coverage/band spread control for certain plug-in assemblies. The receiver is intended to drive head-phones via a rear panel jack, but has sufficient output to drive a small external speaker.
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Analog Devices Inc.
Analog Devices mic pre-amp audio interfaces provide a high fidelity, high performance solution for audio products. Specifications for this family include ultralow 1.5 dB noise figures, 140 dB gain range, and high gain capability. Operating in an extended industrial temperature range of –40°C to +85°C, this portfolio of mic pre-amp audio interfaces supports many applications, including precision instrumentation, active filters, low noise amplifier front ends, surveillance systems, computerized voice recognition, and a variety of other industrial and consumer products. As the first choice for serious audio engineers, Analog Devices mic pre-amp audio interfaces can give your applications the performance needed to meet the most demanding specifications.
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SolarWinds
One of the most important measurement tasks in radio engineering is the analysis of electrical circuits. A network analyzer is an instrument that is designed to solve this problem with high accuracy and efficiency. The circuits that can be analyzed with network analyzers have a wide range of applications ranging from simple devices such as filters and amplifiers to complex modules used in communications satellites. PLANAR specializes in the development and production of vector network analyzers that combine the capabilities of scalar network analyzers that measure not only the amplitude components of the main characteristics of the system (gain, loss, standing wave ratio, etc.), but also allow measurements of the amplitude and phase characteristics of the system .
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Planar, llc
One of the most important measurement tasks in radio engineering is the analysis of electrical circuits. A network analyzer is an instrument that is designed to solve this problem with high accuracy and efficiency. The circuits that can be analyzed with network analyzers have a wide range of applications ranging from simple devices such as filters and amplifiers to complex modules used in communications satellites. PLANAR specializes in the development and production of vector network analyzers that combine the capabilities of scalar network analyzers that measure not only the amplitude components of the main characteristics of the system (gain, loss, standing wave ratio, etc.), but also allow measurements of the amplitude and phase characteristics of the system .
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µModule® -
Analog Devices Inc.
Analog Devices µModule® (micromodule) receivers consist of high performance, high speed ADCs with fixed-gain, high speed amplifiers and antialias filters. Our integrated ADC and driver products include integrated bypass capacitance and simplify the high frequency layout required to preserve ac performance. The board space savings are significant for instrumentation applications such as spectrum analyzers, oscilloscopes ,and communications test equipment, or for communications applications such as high sensitivity receivers, software-defined radio (SDR), or signal intelligence receivers. Our portfolio uses system-in-package (SiP) technology similar to multichip modules (MCM) to integrate components with different technologies, along with passive components to make an integrated subsystem.
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Genmark Automation
- Control of versatile robotic structures, including "yaw", "pitch" and "roll" motion capabilities- S-curve velocity profiling, based on polynomial splines and Bernstein-Bezier curves- Continuous path control in multi-segment smooth trajectories- Synchronization of multiple axes- Trajectory control with user defined velocity profiles- Kinematical modeling of open and closed loop mechanisms- Singularity consistent path planning and singularity avoidance- Optimal PID filter tuning- Automatic adjustment with respect to the surrounding equipment (cassettes, process stations, etc.)- Tilting capabilities in terms of the end-effector frame- Compensation for deflection of the end effector, the manipulated object and geometric in accuracies of the arm Scanning and Aligning Features- Wafer mapping based on through-beam or reflective sensors- Automatic detection of the planarity and the center of wafers and FPD- Non contact FPD aligning. Misalignment compensation on the fly Safety- Programmable travel limits- Position tracking error detection- Amplifier overload protection- Emergency stop
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Model UDA -
tecsis LP
Model UDA is a universal signal conditioner and amplifier designed for use with all full bridge, strain gage-based transducers. Model UDA turns the analog signal into a user-selectable output of ±5Vdc, ±10Vdc, or 4-20mA. This versatile unit features selectable excitation of 2.5 or 5.0Vdc bridge voltage and has a wide DC power input range from 11 to 28Vdc to adapt to a variety of installations. Model UDA includes a wide zero and span adjustment range and a symmetry adjustment for applications requiring precision in both tension and compression. The configurable low pass filter actively removes unwanted high frequency signal components. The unit is housed in a rugged DIN-mountable enclosure with screw terminals to provide connection for power, analog output, shunt calibration, and sensor signals.
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FIM-71 VHF -
Potomac Instruments, Inc.
The Model FIM-71 is a portable, laboratory quality Field Strength Meter designed for rigorous field applications. Combining a calibrated half-wave dipole antenna and a highly accurate tuned voltmeter with a range of 140 dB, the FIM-71 is suitable for practically all types of RF emission measurements in the 45 MHz to 225 MHz spectrum. The operator can switch select wide or narrow bandwidth, peak or average value of TV or pulse modulated signals, AM or FM demodulation, and a meter dynamic range of either 20 dB or 60 dB. A dc analog output voltage, proportional to the meter indication, is provided for driving a chart recorder. A leveled output from the calibrating oscillator is available for measuring cable insertion loss, filter response, amplifier gain, and other signal ratio measurements. The 4-1/2 inch, taut band, mirrored scale meter is calibrated in volts and dB for precise measurements in field or laboratory environments.
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FIM-72A UHF -
Potomac Instruments, Inc.
The Model FIM-72A is a portable, laboratory quality Field Strength Meter designed for rigorous field applications. Combining a calibrated half-wave dipole antenna and a highly accurate tuned voltmeter with a range of 140 dB, the FIM-72A is suitable for practically all types of RF emission measurements in the 450 MHz to 960 MHz spectrum. The operator can switch select wide or narrow bandwidth, peak or average value of TV or pulse modulated signals, AM or FM demodulation, and meter dynamic range of either 20 dB or 60 dB. A dc analog voltage, proportional to meter indication, is provided for driving a chart recorder or similar device. A leveled output from the calibrating generator is available for measuring cable insertion loss, filter response, amplifier gain, VSWR, and other signal ratio measurements. The 4-1/2 inch, taut band, mirrored scale meter is calibrated in volts and dB for precise measurements in field or laboratory environments.
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SEEPOS -
SiTek Electro Optics AB
For most position measurement applications the SiTek SEEPOS system offers a complete and easy-to-use solution. High speed PSD electronics combined with digital signal processing and high speed USB data transfer gives a powerful measurement system. With its large dynamic range it can handle light powers from nW to mW from DC light sources as well as modulated light sources. All parameters, such as PSD bias voltage, amplifier gain, the use of analog and digital filters etc., are easily controlled from the included software and light spot position is continuously displayed both in XY and X-t, Y-t graphs. Optimized plot algorithms ensure that all data is visually seen on the screen even in full speed measurements. Included tools for data analysis and visualization simplify rapid scan through large data sets in order to find specific parts of interest.
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mks Ophir
Pulse Characterization Sensors provide the ability to see and measure the temporal characteristics of pulsed and CW laser beams. Ophir Fast Photodiode Detectors are designed to convert optical signals into electrical signals which are then measured with third-party instrumentation such as oscilloscopes and spectrum analyzers. Accessories are available to connect to IS6 integrating spheres or fiber optic cables. Attenuating filter accessories are also available to increase their dynamic range. Different models offer silicon, UV enhanced silicon and InGaAs PIN photodiodes, covering a combined spectral range of 193 nm to 1700 nm. Rise times range from 25 picoseconds to 3 nanoseconds. The fast rise times are achieved by an internal reverse bias voltage circuit. Power is supplied by internal batteries and/or an external power supply depending on the model. Detectors should be connected to a 50Ω impedance in order to maintain their nominal rise times. They can be connected to higher impedance loads, but this will result in a significant increase in the rise time. If higher output voltage is required, it is recommended to connect the detector to a trans-impedance amplifier with an Input impedance of 50Ω
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Photo Emission Tech., Inc.
QE system provides electronics and software designed for fully automated measurement of external quantum efficiency of solar cells. All systems include probes and a fixed plate sample stage for samples up to 150 mm x 150 mm. The main system components include: custom designed software, measurement electronics, and computer system (Windows 8 operating system). The measurement involves focusing monochromatic light to a spot on the device under test, then accurately measuring the photon flux and current from the test cell. The system utilizes a dual beam configuration with lock-in detection, providing an absolute accuracy of ±3%. The QE system uses a grating monochrometer with silicon/InGaAs/Ge detectors. The system includes automatic order sorting filters and two light sources for monochromatic illumination (a Xenon- arc lamp and a halogen lamp). A single lock-in amplifier is used to measure both the reference detector and test device. The main system comes with all the hardware needed to measure quantum efficiency, a fixed plate sample stage and probes.
