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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
- Soft Hearts LLC
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Audio Test Software
1. Distortion free stimulus even the equalized stimulus.2. Unlimited channels acquisition and processing. (Hardware limited)3. Human correlated listening test(Bark Scale intensity chart). (Requires large memory)4. Hi Res intensity chart for buzz/pop detection. (Requires large memory)5. Auto equalization method with target dBSPL accuracy.6. TCP client for test framework integration.7. Easy limits and logs development.8. Easy logs visualization module.9. Auto waveform alignment and triggering.(Upto single point alignment accuracy)10. Easy regression testing via TCP client.11. Standard Magnitude, Phase, THD, THD+N, Rubb&Buzz, Pink Noise, Noise Tests.12. Unlimited calibrations and equalization for scaling to different products and stations.13. Lowest test system and test sequence development times.14. Requires minimal training and debugging.15. Automatically avoid Reference speaker play and stop pops.16. WMD/ASIO driver compatible sound cards supported.(B&K 3670 recommended)
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Comb Generator, 10 MHz to 26.5 GHz
U9391C
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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1100-Channel GSM Channelizer wih Quad A/D - 3U VPX
Model 52663
- Complete GSM channelizer with analog IF interface- Four 180 MHz 16-bit A/Ds- Two banks of 375 DDCs for upper GSM band- Two banks of 175 DDCs for lower GSM band- Sample clock synchronization to an external system reference- LVPECL clock/sync bus for multiboard synchronization- PCI Express Gen. 2 x4- 3U VPX form factor provides a compact, rugged platform- Synchronize up to eight modules with Model 7893 System Synchronization and Distribution Amplifier - PCIe
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Reference Supplies
Advanced Energy's Trek reference supplies offer both high temperature and time stability outputs. They can also be used as a secondary traceable standard.
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8-Channel VME Time-to-Digital Converter
V680
The V680 is an 8-channel time-to-digital converter used to record the time of occurrence of eight independent electrical pulse inputs, each measured relative to a single, common reference input. Each input channel can time its event "hit" with 48.82-picosecond resolution and 48-bit dynamic range.
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3D Inspection Service
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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Frequency Synthesizers
A frequency synthesizer allows the designer to generate a variety of output frequencies as multiples of a single reference frequency. The main application is in generating local oscillator (LO) signals for the up- and down-conversion of RF signals.
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1229a Frequency Generator
Precise Time and Frequency, Inc.
The ptf 1229A utilizes the latest technological advances in precision frequency synthesizers to provide a multiple output, wide range, high precision frequency reference instrument, capable of delivering frequencies over the range of 0.1Hz up to 30MHz with a resolution of 0.1 Hz over the full range.The unit includes an external reference input to allow extremely high accuracy outputs at precisely the frequency required, together with a front panel indicator to verify “lock” to the external reference. The standard unit includes two independent frequency outputs of any frequency within the range, and provides both sine and square wave outputs for each frequency.An expansion module gives the capability to increase the number of independent frequency outputs up to a total of four frequencies, with sine and square wave outputs for each, giving a total of eight outputs.
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Frequency Dividers
Holzworth Instrumentation, Inc.
The HX4210 was designed as a reference output translator for Holzworth's early RF Synthesizer designs. The key design requirement was to maintain the low phase noise /jitter characteristics the 100MHz calibrated reference output signal so that it could be utilized as a 10MHz laboratory reference standard.
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Ion 700 Benchtop Meters
Oakton benchtop 700-series meters are designed for use in crowded laboratory settings. Compact footprint of less that 6" x 7" (16 x 18 cm) conserves valuable space, while the large, dual-display LCD provides excellent visibility—even from a distance. Ion 700 meter measures pH, mV, relative mV, ion concentration and temperature. Automatic temperature compensation (ATC) maintains reading accuracy even with fluctuating temperatures. Models feature five-point pH calibration with automatic buffer recognition for both USA (pH 1.68, 4.01, 7.00, 10.01, 12.45) and NIST (pH 1.68, 4.01, 6.86, 9.18, 12.45) pH buffers. Meters additionally feature ion concentration calibration of up to 5 points. Meter features include Auto-Hold, selectable °F or °C measurement, and easy recall of electrode slope or offset. The convenient pull-out quick reference card keeps procedures handy at all times. Use 700-series meters with any pH, ORP, or ISE electrodes with a BNC connector.
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T8090 Dual Absolute Leak Tester
The Dual Absolute.The new Dual Absolute technology makes it possible to eliminate the disadvantages of a classic differential system, improve its advantages and renew an industry that has been standing still for decades. Thanks to the new Dual Absolute technology, ForTest has combined the simplicity of a classic absolute decay system with the precision and sensitivity of a differential system, bringing leak testing instruments to a level never seen before.The new algorithms and measurement hardware eliminate typical defects in a differential system, such as differences in stabilization between the test part and the reference sample.The new range of instruments is able to work in 3 different ways: Pure Differential, Dual Absolute and Central Zero.The new Dual Absolute technology is so powerful and reliable that ForTest has decided to stop developing the classic differential system.
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1000W Ferroresonant Power Supply
Series PRR
Kepco's PRR are 1000 Watt rack mounted laboratory systems power supplies that offer the low cost and very high dependability of ferroresonant voltage stabilization.The ferroresonant stabilizing technique provides extraordinary isolation from a wide variety of source noise. It is inherently short-circuit proof and cannot expose delicate loads to overvoltage hazards. Hence no crowbar, fuses, or bounding circuits are needed. Ferroresonant power supplies use no noise-producing switches or oscillators. Voltage setting is independent of delicate control settings or diode references and requires no comparators, references, or limiters. Efficiency is 70-80%.
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Temperature Calibrators
We offer temperature calibrators in different shapes. We offer temperature dry blocks that can generate an accurate temperature, for example for temperature sensor calibration. We also offer electrical temperature calibrators that can measure and simulate various temperature sensors (RTDs and thermocouples). We also offer high-accuracy reference temperature probes.
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Sound Level Calibrator
521
Accepted internationally 1 kHz represents the "0 dB" reference point of A, B, C Weighting and other filters utilized in acoustic measurement. The Pistonphone - a mechanical sound source - offers a slightly higher degree of accuracy at a substantial increase in cost. In addition, the 200 or 250 Hz operating frequency is mechanically limited and not suited for measurements of filtered inputs. The 0.2 dB accuracy is quickly lost in the 0.7 to 1.5 dB tolerances acceptable for weighting filters at frequencies around 250 Hz.
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1211a Optical Receiver/Distribution
Precise Time and Frequency, Inc.
To complement the range of high quality frequency and timing references, Precise Time and Frequency, LLC. has now introduced a new Optical Time Code Receiver, with Auto Switching, a full complement of time code outputs, and Ethernet/RS232 remote monitoring/control interface.In addition to the auto switching capability, the new ptf 1211A delivers up to thirty six channels of Time Code outputs, including re-transmission of the optical input. The unit can accept a pair of inputs (usually from separate primary and backup sources), and provides monitoring of both the inputs and outputs for signal integrity.If the primary input fails, the unit will automatically switch to the backup input and indicate a primary signal fault.Full remote monitoring and control via RS232 and Ethernet interfaces includes telnet, http (web browser), and SNMP protocols.
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Reference Sources
A physical or digital document that you would refer to for more information about a topic.
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Universal Clock
DXD-16
The DXD-16 Universal Clock is a PTP Grandmaster clock with GPS receiver and a multi-format legacy reference generator. While working in a PTP environment, the DXD-16 keeps legacy equipment perfectly synchronized with the IP infrastructure, or vice-versa.
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QuartzXM Carrier Design Package
Model 4801
- Pin definitions and electrical specifications of all signals on the module- 3D models of the module- Thermal profiles of the module and components- Carrier reference design schematics- PCB stack-up recommendations- PCB design guidelines and routing rules- Operating systems and bootstrap guidelines- Additional electrical and mechanical engineering guidance
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Microvolt DC Volt Meter
QA350
The QA350 relies on a built-in reference to calibrate the ratio between the hi and low ranges. If you have a preferred lab reference, you may use that it to improve the QA350 accuracy beyond the indicated +/- 400 PPM. For example, various vendors on eBay can provide calibrated +/-30 PPM 5 or 10V voltage references that can be used to set the ultimate accuracy of the QA350 to under 50 PPM at room temperature.
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Scanner Platform
Spectral Engines provides fully wavelength and temperature calibrated spectrometers including light sources (NIRONE Sensors), and for customers wanting to private label a solution and move to market quickly, the NIRONE Scanner platform provides the complete instrumentation, communication methods, cloud platform, reference library creation and algorithm implementation.
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Wireless Device Functional Test Reference Solution
The Keysight S8890A Wireless Device Functional Test Reference Solution provides an automation environment which is both simple to use, yet comprehensive and powerful. Based on the Test Automation Platform www.keysight.com/find/TAP, S8890A provides optional instrument driver/plug-ins offering simplified logically grouped control steps. These steps can be sequenced, looped and swept to provide powerful individual test cases or comprehensive sequences. Each driver/plug-in is provided with extensive starter sample test cases which can be modified by Keysight or the end user the UE to be tested. Plug-in options:
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Sensor Solutions for IoT
Imec is a reference in the design of ultra-low power electronics, low-power algorithms to increase intelligence and data security, and in all aspects of data science. Our multi-sensor environmental monitoring platform features sensors for temperature, relative humidity, NO2, CO2, VOC (volatile organic compounds), particle matter, ambient light, sound, vibrations and presence detection. Our test platform is suitable for indoor and outdoor air quality monitoring and control, and can be used in smart buildings, smart cities and more.
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SWR True Antenna Analyzer
SWR True Antenna Analyzer is a versatile analyzer covering all major communication bands from 30MHz to 2700MHz. The SWR True will analyze antennas and cables. Measurements are represented graphically as VSWR or Return Loss plots. The built in PLL synthesized generator offers a superior accuracy with small step size. The internal operating system controls measurement, display and the I/Os allowing serial communication to PC, USB to memory stick and USB Serial communication. The I/O options are used to write plots to either memory sticks or to a connected PC, the I/Os can also be used to operate the instrument, giving commands and receiving data. For documentation reference the instrument has a real time clock. Multilayer menus are used to setup and control the operation of parameters. The SWR True instrument is small, handy and light weight battery operated with more than 6 hours of continuous operation on the internal NiMh cells. Feature with XML data handling and application viewer is included. Accessory kit with soft carrying bag, car charger and coax adapters for standard types.
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4/8-CH 12-Bit 1 MS/s Analog Output Multi-Function PXI modules
PXI-2502
ADLINIK PXI-2501 and PXI-2502 are high-speed, high-performance analog output multifunction PXI modules. These devices are able to update up to 8-CH, 12-bit analog outputs imultaneously sustaining 1 MS/s. The reference sources and output polarities are programmable individually per channel. Combine this with the multiplying PXI architecture, ADLINK PXI-2500 series PXI modules can generate complex modulated analog signals. The hardware-based arbitrary waveform generation frees CPU intervention even when all analog outputs are updating at full speed, and the lengths of waveforms are only limited by the system memory. The PXI-2500 series integrate up to 8-CH, 400 kS/s, 14-bit single-ended analog inputs with programmable polarity, 24-CH programmable digital I/O lines, and 2-CH 16-bit general-purpose timer/counters.
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Air Data Calibration
Fluke calibration offers digital pressure monitors, air data calibrators and laboratory standards for air data pressure range calibrations. Each of these systems feature pressure ranges, measurement units and features specific to calibrate air data test sets and RVSM compliant air data instruments. Models include 2468 Ruska and ADCS-601 DHI primary level standards; 7750i Ruska air data controller/calibrator and RPM4-AD DHI reference pressure monitor.
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EXG X-Series Microwave Analog Signal Generator, 9 kHz to 40 GHz
N5173B
Balance budget & performance to address parametric testing of microwave components & receiversPerform LO up conversion for microwave backhaul links or CW blocking for receiver testingMaximize test throughput with 600-s frequency switchingCharacterize microwave filters & amplifiers with the best combination of output power, low harmonics & full step attenuationUse as a high-stability system reference: the standard high-performance OCXO has an aging rate of 5x10-10 parts/day
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Isolation Measurement System
DM-8000H
*The input block, control block and display block are isolated with optical fiber cables. (DM-900A/AL, DM-910A/AL)*Frequency bandwidth: DC to 500MHz.*Simultaneous multi-channel measurement of many channels of different reference potentials. (2 to 24 channels) (DM-900A/AL)*Long-life battery drive. (The system can be driven by three batteries for about 12 hours) (DM-900A/AL, DM-910A/AL)*Measurement using long memory. (DM-900A/AL, DM-910A/AL)*Simultaneous measurements of the inverter's switching waveform and ON-voltage. (DM-910A/AL)
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Frequency Distributions
Distribution Amplifier offers an economical solutionto the problem of low-jitter transferof frequency reference signals over longer distance.
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PXIe-6674T, OCXO PXI Synchronization Module
781037-01
PXIe, OCXO PXI Synchronization Module—The PXIe‑6674T generates and routes clocks and triggers between devices in a PXI Express chassis as well as to other PXI and PXI Express chassis or third-party instrumentation. The PXIe‑6674T unlocks the advanced low-voltage differential signaling (LVDS) trigger signals PXIe‑DStarA, PXIe‑DStarB, and PXIe‑DStarC, on PXI Express while fully supporting the PXI trigger lines. The PXIe‑6674T can generate two types of clock signals: a highly stable 10 MHz clock based on an onboard precision oven-controlled crystal oscillator (OCXO) reference and a second clock from the direct digital synthesis (DDS) clock generation circuit.
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4-Channel 200 MHz A/D with DDC, Kintex UltraScale FPGA - 3U VPX
Model 52861
- Jade Xilinx Kintex UltraScale FPGA Products and Navigator Design Suite Software Video- Jade Xilinx Kintex UltraScale FPGA Family Brochure- Complete radar and software radio interface solution- Supports Xilinx Kintex UltraScale FPGAs- Four 200 MHz 16-bit A/Ds- Four multiband DDCs (digital downconverters)- 5 GB of DDR4 SDRAM- Sample clock synchronization to an external system reference- LVPECL clock/sync bus for multimodule synchronization- PCI Express (Gen. 1, 2 & 3) interface up to x4- Optional LVDS and gigabit serial connections to the FPGA for custom I/O- Compatible with several VITA standards including: VITA-46, VITA-48 and VITA-65 (OpenVPX™ System Specification)- Ruggedized and conduction-cooled versions available- Synchronize up to eight modules with Model 7893 System Synchronization and Distribution Amplifier - PCIe
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6GHz Dual Frequency Synthesizer moduleValon
5009
The Valon 5009 Dual Frequency Synthesizer module is our latest offering in high frequency synthesizer sources. These frequency synthesizers are perfect in applications that require a spectrally pure and highly stable signal source or timing clock. Our synthesizers have replaced laboratory generators costing many times more in a number of applications. Each module actually contains two independent sources locked to the same internal or external frequency reference or standard. Having two phase coherent sources in the same convenient package opens up a wide variety of test applications and solutions
