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
Sound Level Indicators
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A sound level meter is a measuring instrument used to assess noise or sound levels by measuring sound pressure. Often referred to as a sound pressure level (SPL) meter, decibel (dB) meter, noise meter or noise dosimeter, a sound level meter uses a microphone to capture sound. The sound is then evaluated within the sound level meter and acoustic measurement values are shown on the display of the sound level meter. The most common unit of acoustic measurement for sound is the decibel (dB); however, some sound level meter devices also determine the equivalent continuous sound level (Leq) and other acoustic parameters. With a portable sound level meter, industrial hygiene and workplace safety professionals can measure sound levels in multiple locations to ensure environmental conditions fall within recommended exposure limits (RELs). Some sound level meter devices can be permanently installed for continuous monitoring of sound levels at a work or job site.An important attribute to consider when searching for a suitable sound level meter is its type or class. The type or class of a sound level meter defines the device's accuracy as per American National Standards Institute (ANSI) or International Electrotechnical Commission (IEC) guidelines. Typically, "type" is the grade according to the ANSI S1.4 standard, whereas "class" is the grade according to the IEC 61672 standard. There are two types or classes assigned to sound level meters: type 1 / class 1 or type 2 / class 2. For assessing noise in basic industrial, commercial, educational, recreational or residential applications, a type 2 / class 2 sound level meter usually will suffice. For precision-grade assessments often made in a laboratory, a type 1 / class 1 sound level meter primarily is used. PCE sound level meter products are lightweight, easy-to-use and manufactured in accordance with the highest industrial standards.
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Product
Multi-format Video Generator
LT 4600A
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The LT 4600A multi-format video generator is a compact, 1U half-rack size SDI video signal generator that supports the triple-rate SDI (3G-SDI/HD-SDI/SD-SDI) format. In addition to test pattern output including color bars and SDI check fields, the LT 4600A is equipped with numerous features such as ID characters, QVGA logo marks, safety area markers, audio embedding, genlock function for external reference input signals, and three analog black signal outputs.
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Product
1231a Very High Frequency Distribution
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Precise Time and Frequency, Inc.
The ptf 1230A(1U)/1231A(2U) GPS L-Band RF Distribution amplifiers provide high performance GPS signal references for laboratory or systems use. In most applications the low noise and signal gain capability of the units will provide userswith a robust GPS signal source for lab or system requirements.The ptf 1230A/1231A uses individually buffered output stages and insures maximum isolation between the individual outputs. The ptf 1231A offers 12 outputs. Options are available for a 2U/3.5” version (ptf 1230A) with 24 outputs.Isolation from output to output is >-40 dB. The input also offers DCV for biasing an active antenna.
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Product
True Reference Audio Interface With MDIO Expansion
Titan
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Titan and Atlas are world class multi-track interfaces offering flexible expansion and unsurpassable sonic clarity. Using the latest generation of Prism Sounds trusted conversion, Titan is ideal for music and sound recording, multi-tracking, overdubbing, stem-based mastering, analogue summing and critical listening applications.
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Product
Digital Transmitter
CA-320A
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The CA-320A Digital Transmitter and CA-320B Receiver comprise the exciting new Compass Correction System. This is the first system that does not need an external heading reference for the for the alignment of the compass.
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Product
Dual-Band RF Tuner and 4-Ch 400 MHz A/D with Kintex UltraScale FPGA - 6U VPX
Model 58891
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- Jade Xilinx Kintex UltraScale FPGA Products and Navigator Design Suite Software Video- Jade Xilinx Kintex UltraScale FPGA Family Brochure- 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- Four 400 MHz 12-bit A/Ds digitize IF or I+Q signals synchronously- Four FPGA-based multiband DDCs (digital downconverters)- Two Xilinx® Kintex® UltraScale™ FPGA- 10 GB of DDR4 SDRAM- Sample clock synchronization to an external system reference- PCI Express interface (Gen. 1, 2 & 3) up to x8- Clock/sync bus for multimodule synchronization- Optional LVDS and gigabit serial connections for FPGA for custom I/O- Navigator BSP® for software development- Navigator FDK® for custom IP development- Spark® fully-integrated development system- Free lifetime applications support- Synchronize up to eight modules with Model 7893 System Synchronization and Distribution Amplifier - PCIe
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Product
0.35° Accuracy Roll & Pitch Surface Dynamic Motion Sensor
DMS-535RP
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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
Selective Availability Anti-spoofing Module (SAASM) Test Platform
SimSAAS
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Comprehensive testing of SAASM for classified military applications. Military GPS receivers can use a Selective Availability Anti-Spoofing Module (SAASM) to enable decryption of precise positioning data. Selective Availability (SA) refers to a discontinued practice by the U.S. government to degrade the civil signal to prevent full accuracy. Since May 1, 2000, Selective Availability has not been operational.
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Product
COM Express® Type 6 R3.1 Reference Carrier Board In ATX Form Factor
Express-BASE6 R3.1
Computer on Module
Express-BASE6 R3.1 is an ATX COM-Express Type 6 Basic / Compact size module reference carrier board based on PICMG COM-Express Revision 3.1. Together with the COM-Express Type 6 module of your choice and off the shelf add-on cards, you can quickly emulate the functionality of your desired end product for software development and hardware verification.
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Product
PH Meters
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Shenzhen Graigar Technology Co.,Ltd.
A pH Meter is a device used for potentiometrically measuring the pH, which is either the concentration or the activity of hydrogen ions, of an aqueous solution. It usually has a glass electrode plus a calomel reference electrode, or a combination electrode.
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Product
PXIe-6614, 5 V, 8-Channel, Precision Reference PXI Counter/Timer Module
782353-01
Counter/Timer Module
PXIe, 5 V, 8-Channel, Precision Reference PXI Counter/Timer Module—The PXIe‑6614 is a high-precision counter/timer module that performs encoder position measurement, event counting, period measurement, pulse-width measurement, pulse generation, pulse-train generation, and frequency measurement. It features eight counter/timers, digital debouncing filters, and TTL/CMOS‑compatible digital I/O. The PXIe‑6614 offers industrially rugged features for a wide array of applications such as automotive/aerospace, industrial/motion control, and manufacturing test. Measurements are highly accurate and precise over longer periods of time because of the oven‑controlled crystal oscillator (OCXO) in the module.
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Product
0.75" Synthesizer
LX Series 0.75” x 0.75” x 0.15"
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*Surface Mount Miniature Package *Optional Internal Reference *Output Power to +10 dBm Available
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Product
Fully automated Crude and Detergent Fibre analysis
Fibertec™ 8000
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The Fibertec 8000 is a fully automated system for determination of crude fibre, detergent fibre and related parameters according to standard reference 'crucible' methods such as Weende, van Soest and other recognised methods. Approvals for the crucible method include ISO, EEC, AOAC, AOCS. The Fibertec 8000 provides unrivalled accuracy, the highest safety and the lowest operator time of any fibre solution.Parameters: Crude fibre, neutral detergent fibre, acid detergent fibre, acid detergent lignin. Sample types: Raw materials and finished products in Feed and Agriculture.
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Product
RS232 Straight-Through Cable, DB-9 Female to DB-9 Male, 2m
183045-02
Serial Cable
9-Pin Female DB-9 to 9-Pin Male DB-9 GPIB Serial Cable - The 9F-9M S10 Serial Cable, sometimes referred to as GPIB S10 Cable, connects and controls GPIB devices using the RS232 serial port. The 9F-9M S10 Serial Cable is offered in different lengths.
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Product
Shunt Regulators
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These are the standard reference voltage source widely used by the feedback circuits of switching power supplies. Compared to the Zener diode, which is a discrete product, a shunt regulator has much better voltage precision because voltage control is carried out as an IC.
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Product
IQ Demodulator
IQD Series
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*Capable of receiving RF and LO frequency inputs *Output from DC to 500 MHz *Internal low noise oscillator Internal reference *Buffered demodulator *Balanced IQ *Optimized for low EVm *Optional internal Reference Detect Switch (EM Research RDS Series) *Up to 250 mega-symbols per second
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Product
Rad-Hard Analog ICs
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ST's wide range of rad-hard QML-V qualified analog ICs covers analog-to-digital converters (ADC) and digital-to-analog converters (DAC) for telemetry, instrumentation and imaging applications. Our portfolio also includes rad-hard op amps, high-speed differential amplifiers up to 1 GHz, shunt voltage references and comparators to ensure a complete solution for signal conditioning, referencing and data conversion.
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Product
Modular Mounts
M-SWITCH
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The M-Switch series of adjustable, modular mounts are designed to redirect a horizontal interferometric set-up to a vertical one. This vertical orientation can help reduce distortion effects commonly found from clamping, and reduce alignment time. There are 4 primary versions of hardware designed to enable testing of mirrors, windows, lenses and lens assemblies. Holding of the part under test can be done with a variable 3 arm mount (for flexibility) or our kinematic mount (for high volume). Reference mirrors can be supplied with a variety of flatness and coating specifications to match your application needs.
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Product
Machine Vision Camera - 1.2 MP, 52 FPS, Aptina AR0134, Color
Blackfly GigE
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The Blackfly® camera line combines Sony CCD, Aptina, e2v, and Sharp sensors with a host of unique features. For FLIR area scan cameras with the latest sensors and most advanced feature sets, please refer to our Blackfly S and Oryx camera families.
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Product
Precision Resistor Network
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Analog Devices provides a portfolio of quad resistor networks with excellent matching specifications over the entire temperature range. All of our resistors can be accessed and biased independently, making them a convenient and versatile choice for any application that can benefit from matched resistors. Our resistor networks provide the precise ratiometric stability required in highly accurate difference amplifiers, voltage references, and bridge circuits.
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Product
Series Precision Fixed-Ratio Current Transformers
PMT25100
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Power Measurement Technologies Inc.
Precision two-stage toroidal current transformers find application as the reference in determining the accuracy of instrumentation current transformers.
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Product
RTSI Bus Cables for 2 PCI or AT/ISA Devices
776249-02
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34-Pin Female RTSI to 34-Pin Female RTSI Ribbon Cable - The RTSI Cable, sometimes referred to as RTSI, connects RTSI bus connectors on adjacent NI plug-in boards. The RTSI Cable is offered with different numbers of ribbon connections and in different lengths.
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Product
Fixed Ultrasonic Heat Meter
E3
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Gentos Measurement & Control Co.
In times of increasing energy costs, it is important to measure and control energy consumption accurately. Energy Meters, commonly referred to as BTU meters or heat/ cold meter, can be defined by the measurement of heat/chilled water energy consumption.
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Product
Self Powered Active Load
TBOH02
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The TBOH02 is a self powered, precision active load. It does not need a separate supply voltage and operates as low as 2V. Its features include constant resistance and constant current mode. A 10 turn potentiometer with dial, a range switch and a precision reference enable accurate setting of current or resistance. Furthermore it can be controlled by an external voltage.
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Product
Rolling Stock Antenna
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Rolling stock refers to the vehicles that move on a railway, including the many components and sub-systems that require electrical connections.
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Product
Tester Electrical Interfaces
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The primary element of the tester electrical interface is the Probe Pin Ring (PPR). Sometimes referred to as a ‘tower,’ this array of spring-loaded probes can be arranged to provide a controlled impedance path, a low leakage connection, a low inductance arrangement for high currents, or just about any connection characteristic you require. inTEST EMS provides electrical interfaces in various OEM-supported designs, inTEST standards, and custom configurations.
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Product
Digital Pressure Gauge
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Precision digital pressure gauges are suitable for stationary and also mobile measurement and display of pressures. In addition, a digital pressure indicator can be used as a pressure reference and enables the easy testing, adjustment and calibration of other pressure measuring equipment directly on site. Through efficient measuring cells with electronic linearisation of the characteristic curve, a high accuracy is achieved.
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Product
ZIPLEVEL® GEOTECH
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The ZIPLEVEL GEOTECH is a precision pressurized hydrostatic altimeter created directly from the proven ZIPLEVEL PRO-2000 technology. Unlike the PRO-2000, the GEOTECH keeps the measurement module electronics fixed within its base unit reel hub while its compact reference cell moves freely as a sensor. The difference in elevation between the sensor and the base unit is displayed directly in digits with all the powerful functions, reliability and ease of use of the ZIPLEVEL PRO-2000.
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Product
Paramagnetic O2 Analyzer Optional CO2 Sensor
Model T802
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Teledyne Advanced Pollution Instrumentation
The Model T802 O2 uses the proven paramagnetic measurement principle, coupled with state of the art microprocessor technology, to provide accurate and dependable measurements of Percent-Level O2.Paramagnetic technology is non-depleting, which means that there are no consumable parts, and ensures a consistent performance over time. The selectivity of the paramagnetic measurement for oxygen means that there is little or no interference from other common background gases. The T802 offers a stable and inherently linear measurement of oxygen, making it possible to calibrate the analyzer by checking only two points. There is no requirement for a reference gas during operation.
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Product
MCX Male to SMA Male Cable, 50 Ohm, 1 m
188377-01
Coaxial Cable
The MCX-SMA Coaxial Cable, sometimes referred to as MCX400 or MCX410, connects measurement and signal devices. NI offers this 50 ohm cable in different lengths.
