References
A source of comparison.
See Also: Reference Standards, Reference Antennas, Reference Decoders, Reference Jumpers, Reference Sources, Reference Transformers, Reference Transmitters, Acoustical References, Frequency References, Solar Reference Cells
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Product
Height Gages
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Used from a flat surface such as a Starrett granite surface plate, height gages measure the distance from the reference surface to some feature of a part, and can do so with exceptional accuracy. accuracy. Starrett offers a full range of height gages. Our Altissimo advanced electronic height gage is rich in features and exceptionally accurate. gages are available with a choice of range and feature sets. Our vernier height gages are still preferred by many for their exceptional accuracy. For the highest level of accuracy, we offer DIGI-CHEK gages. These tools are typically used in combination with the various scribes, attachments and accessories available from Starrett to complete the inspection work.
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Product
Digital Tank Test Kit
4109
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The voltmeter included in the kit, the “Model DPM” voltmeter, is designed for ease of use by meter readers and corrosion technicians alike and the voltmeter comes with an integrated RE-5 reference electrode attached for “metallic structure-to-soil” potential difference readings. The kit also includes a special test lead that has a brass thumb screw on one end which allows the test lead to substitute for the RE-5 reference electrode. This substitution allows the voltmeter to take “structure-to-structure” potential difference readings. The voltmeter offers two ranges, ±2VDC and ±20VDC with a 20MΩ input impedance. Since the voltmeter is digital [in contrast to the meter in our analog tank test kit (Cat. # 4108)], both negative and positive voltages are displayed. `
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Product
Spectral Response SystemsQuantum Efficiency SystemsIPCE Measurement Systems
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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.
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Product
Programmable Multifrequency Clock Synthesizer - PMC
Model 7191
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- Simultaneous synthesis of up to up to 5 different clocks- Eight SMC clock outputs- Ideal for A/D and D/A converter clock sources- Typical phase noise: -105 dBc/Hz @ 1 kHz offset- All clocks are phase-locked to input reference signal- Input reference frequency of 5 or 100 MHz- Four programmable VCXOs with 32-bit tuning resolution- Output clocks of 1, 2, 4, 8, or 16 submultiples of VCXO base frequencies- Output clock frequencies between 50 and 700 MHz- Control and status via PCI bus interface
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Product
R6868, Low-Cost, Unshielded Ribbon Cable, 1 m
182482-01
Ribbon Cable
68-Pin Female to 68-Pin Female, 1 Ribbon Connection Ribbon Cable - The R68F-68F Cable, sometimes referred to as the R68-68 or RC68-68, is a flat ribbon cable that connects to 68-pin NI data acquisition or digital I/O devices. The R68F-68F Cable is offered in different lengths and with D-SUB or VHDCI front end connectors.
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Product
Steering Module Test Systems
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Steering test systems for quiet evaluation of rattle, NVH & performance issues – non-hydraulic. The MB Dynamics Steering Module Test Simulator family of technologies (SMTS) is an assembly of components and software designed to facilitate the quiet testing, development, troubleshooting, and auditing of a variety of steering gear and steering column assemblies — collectively referred to here as steering modules (including components).
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Product
Rain Spray Test Environmental Chamber
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Guangdong Bell Experiment Equipment Co.,Ltd
DGBell’s rain spray test environmental chamber is also known as rain spray test chamber, it is used to test the water resistance for electronic and electrical products, such as solar lights, garden lights, buried lights, tunnel lights, car lights, fountain lights, the display…etc. It can also provide references for product design and quality control.
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Product
2-Channel DAQ Module
FMC142
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Sundance Multiprocessor Technology Ltd.
The FMC142 is an analog-to-digital (A/D) and digital-to-analog (D/A) FMC daughter card that provides two 16-bit A/D channels at 370MSPS and two 16-bit D/A channels at 2.5GSPS which can be clocked by an internal clock source (optionally locked to an external reference) or by an externally-supplied sample clock. A trigger input is also available for customized sampling control. The FMC142 is mechanically and electrically compliant to the FMC standard (ANSI/VITA 57.1-2010). It offers front panel analog I/O access and can be used in a conduction-cooled environment.
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Product
"Extremely Random" Precision Noise Generator
Model 3025
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The Model 3025, "Extremely Random"TM Precision Noise Generator supplies White and Pink Noise, and a 1 kHz reference signal. Crystal controlled - the pseudo random circuitry provides a 6.5 Day pseudo-random cycle time, assuring a "Extremely Random"TM noise source.
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Product
0.50° Accuracy Roll & Pitch Surface Dynamic Motion Sensor
DMS-550RP
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The DMS range of motion sensors is designed specifically for the motion measurement needs of the marine industry. Whether it is achieving IHO standard survey from any size of vessel, or providing safety critical monitoring of offshore platforms, large vessels, helicopter landing decks, cranes and positioning systems, the DMS provides accurate motion measurement in all sea conditions. Incorporating an enhanced external velocity and heading aiding algorithm for improved accuracy during dynamic manoeuvres, the solid state angular rate sensors offer reliability in the highest performing vertical reference units ever produced by TSS.
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Product
3D Inspection Service
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The reference data may come in the form of a table, with values at specific points or features, a cad model, or 3d scan. 3D inspection services may require datum measurements, where the part to be inspected is located in a fixture that is specifically designed to orient the part by an ordered method. In some cases, the part may have features that are designed specifically to be referenced by datums, if no functional feature of the part provides a clear reference.
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Product
SR Series AC Reference Supplies
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Computer Conversions Corporation
The SR Series are miniature, low cost AC reference generators designed to supply 26 or 115 Volt excitation to Synchros or resolvers in military and industrial control applications. They accept +/- 15V DC and provide up to 5VA of transformer isolated output power. These converters are packaged in PC card mounting modules 2.6" x 3.1" x 1"H.
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Product
Regeneration Station
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This equipment is a stand-alone device that enables to coherently regenerate an optical signal allowing long-haul dissemination of an ultra-stable optical frequency reference. Its architecture is based on the heterodyne phase-locking of a narrow spectral width laser diode on the reference signal. The station is equipped with low phase noise optical interferometer that perform a thorough characterization of the phase noise accumulated by the incoming signal, and a compensation system of this phase noise.
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Product
Rectangular Horn Antennas
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SAGE Millimeter wave rectangular gain horns, also called pyramidal gain horns, are offered as both standard and custom models with a rectangular waveguide interface. The pyramidal gain horns only support linear polarization. With a calibrated gain chart, these horns can be used to measure the gain of other antennas by comparing the generated signal levels of both. For this reason, these horns are also referred to as standard gain horns. The listed models offer 23 dB nominal gain, 10/11 degrees typical half power beamwidth and 14 dB/30 dB typical side lobe levels at the center frequency of the band. These horns cover full waveguide bandwidths within the frequency range of 8.2 to 170 GHz. In addition to the models listed below, models with 10, 15, 20 and 25 dB gain and other frequency bands are also available.
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Product
SMB Female to BNC Female Cable, 50 Ohm, 8 cm (Quantity 10)
781449-10
Coaxial Cable
The SMB-BNC Coaxial Cable, sometimes referred to as SMB-100 or SMB-110, connects measurement and signal devices. NI offers this 50 Ω cable in different lengths and quantities.
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Product
L-Band RF Tuner and 2-Channel 500 MHz A/D with Virtex-7 FPGA - XMC
Model 71791
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- Accepts RF Signals from 925 MHz to 2175 MHz- Programmable LNA handles L-Band input signal levels from -50 dBm to +10 dBm- Programmable analog downconverter provides IF or I+Q baseband signals at frequencies up to 123 MHz- Two 500 MHz 12-bit A/Ds digitize IF or I+Q signals synchronously; optional: 400 MHz 14-bit A/Ds- Two FPGA-based multiband digital downconverters- Xilinx Virtex-7 VX330T or VX690T FPGAs- 4 GB of DDR3 SDRAM- Sample clock synchronization to an external system reference- PCI Express (Gen. 1, 2 & 3) interface, up to x8- Clock/sync bus for multimodule synchronization- VITA 42.0 XMC compatible with switched fabric interfaces- Optional user-configurable gigabit serial interface- Optional LVDS connections to the Virtex-7 FPGA for custom I/O
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Product
Optical Wavelength Meter
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Optoplex Optical wavelength meter (OWM) uses proprietary thin-film interference filter in conjunction with Fabry-Perot cavity technology combined with a micro-actuator and high-speed electronics. Its working principle is schematically shown below. By comparison with Optical channel monitor / Optical performance monitor, the proprietary wavelength reference unit is introduced to ensure high precision wavelength measurements. Optoplex Optical wavelength meter is the only DWDM wavelength meter capable of measuring wavelengths of multi-lasers in DWDM networks over C-band and L-band wavelength range with a high accuracy better than that the wavelength locker can provide. For example, the device can simultaneously report 80 wavelength values of 80 channels at 50 GHz channel spacing with the wavelength accuracy ± 2 GHz. DPRAM, RS-232, or USB interfaces are available and OWM can be customized to meet specific requirements.
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Product
Heading Reference Directional Gyroscopes
4000HR-series
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The 4000HR air-driven directional gyro offers some of the best features of our other popular models. It inherited all of the functionality and reliability of the industry standard 4000B upon which it’s based, and it picked up a heading reference bug from the 4000C autopilot model.
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Product
Digital to Synchro and Digital to Resolver Converters
Digital / Synchro Converter
Computer Conversions Corporation
1.2VA, 1.5VA, 4.5VA and 5VA Models60 or 400, & 60 and 400 Hz. Models to 22 KHz.Trouble Free Isolated Reference Inputs & Signal OutputsUltra High Efficiency, Low DistortionSelf Powered off the AC Reference Input (DSP Series)Internal Cool AC-Pulsating Supplies (DSP Series)Very Low Loss & Heat DissipationFULLY INTEGRATED, NO EXTERNAL COMPONENTS REQUIREDVery High Resistance to Shock and VibrationHigh Reliability Throughout ImplementationIsolated, Transient, Therrnally & Short Circuit Protected Outputs
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Product
Bench Multimeters
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Fluke Calibration meters have the precision and versatility to handle the most demanding measurements, on the bench or in a system. These instruments are easy to use and offer excellent value that makes them an ideal solution for many applications. Standards laboratory meters include: Reference multimeters; precision digital multimeters; bench multimeters
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Product
Comb Generator, 10 MHz to 26.5 GHz
U9391C
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The Keysight Technologies, Inc. U9391C comb generators were developed to provide precision phase calibration, for non-linear measurements using the PNA-X nonlinear vector network analyser (NVNA), referenced to the National Institute of Standards and Technology (NIST) standard. Additionally, the comb generators can be used to calibrate PNA and PNA-X network analyzers for phase and delay measurements of frequency converters without requiring reference or calibration mixers.
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Product
Fault finder
The STaff™
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The staff fault finder is designed to meet the demands of the professional troubleshooter but its simplicity and price make it a tool for anyone needing to locate cable faults. Arrows on the LCD screen direct the user to the fault with pinpoint accuracy. A reference indication also will aid the user in identifying multiple faults when present. Whether you are fault locating utility service line or locating a broken sprinkler wire, the STAFF is the professional's choice.
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Product
Coating thickness XRF Standards
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We manufacture high accuracy reference standards capable of calibrating virtually any X-Ray Fluorescence (XRF) coating thickness and composition analysis system.
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Product
DC - 400 MHz PC-Based Timer Interval Analyzer
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GuideTech’s GT658PCI is an ultra-fast, high resolution, DC – 400 MHz Time Interval Analyzer (TIA), ideal for most PC-based lab bench (timing) test applications. What makes the GT 658 superior to traditional counters is analogous to the difference between volt meters & digital scopes. While both measure voltage, the scope provides much more information about the dynamics of the signal. This is because our patented TIA substantially increases measurement speed, and the measurements are displayed as afunction of time. All of these features, along with the benefit of ‘continuous time correlation to a common reference between all measurement time stamps,’ enable our TIAs to make measurements that weren’t previously possible with traditional counters.
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Product
Four Terminal Pair Standard Resistor Set
42030A
Programmable Resistor Module
The 42030A is a standard resistor set consisting of nine precision resistor standards which range from 1 mΩ to 100 kΩ. These resistors are primarily used for performance tests of Keysight's 4-terminal pair LCR meters and impedance analyzers. Refer to the instrument's operation/service manual for the method of using these standards.
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Product
PPID-2000 Photosynthetic Photon Intensity Distribution Test Unit
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Hangzhou Everfine Photo-E-Info Co., LTD
It is mainly used for testing plant lighting products. With the EVERFINE GO-R5000 goniophotometer system, it can realize the measurement of plant photosynthetic photon intensity distribution (μmol/s/sr) in the whole space. In addition, the device can also realize the test of photosynthetic photon flux, far red light photon flux, photosynthetic radiation efficiency and other parameters, referring to DLC, ASABE, DIN, GB, CQC and CSA related international plant lighting standards .
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Product
Linear regulated power supply with thyristor pre-regulation
NTN
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High efficiency Short circuit proof and unlimited operation with full current in short circuit condition voltage and current regulation with automatic and sharp transition; control mode indicated by LEDs Voltage and current setting with 10-turn potentiometers with precision scale; the adjusting knob can be locked 4 digit DVM for voltage and current (for table-top models) Sense terminals for the compensation of voltage drop on the load lines. The nominal voltage always refers to the output terminals Parallel and series connection possible Suitable for inductive and capacitive loads for 700 W nominal power and higher, limitation of inrush current on switching on Interlock loop to monitor the external load and internal loop as a standard for three phase units Elapsed-hour meter as a standard for three phase units
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Product
Multifrequency Clock Synthesizer - 6U VPX
Model 5890
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- Simultaneous synthesis of up to 10 different clocks- 16 SMC clock outputs- Typical phase noise: 105 dBc/Hz @ 1 kHz offset- All clocks are phase-locked to input reference signal- Input reference frequency of 5 to 100 MHz- Eight quad VCXOs allow selection from 16 different base frequencies- Output clocks of 1, 2, 4, 8, or 16 submultiples of VCXO base frequencies- Output clock frequencies between 50 and 700 MHz- Control and status over the VPX backplane
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Product
Cleaning Validation
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Cleaning validation, which is essential for quality assurance in pharmaceutical manufacturing, refers to the quantification of residues after cleaning of manufacturing facilities and equipment to verify that the amount is below a predetermined acceptable limit.
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Product
Linear Interferometer
10702A
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The 10702A includes one 10703A Retroreflector as a reference reflector. A second 10703A is needed to complete the linear measurement optic set. The interferometer cannot be used to bend the beam. If the interferometer is the moving component, the 10702A Option 001 must be ordered. More about the 10703A Retroreflector
