Frequency References
See Also: References, Reference Standards, Reference Antennas, Reference Decoders, Reference Jumpers, Reference Sources, Reference Transformers, Reference Transmitters, Acoustical References, Solar Reference Cells
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Frequency Counters
Combines a calibrated RMS RF Power Meter, a wide-band frequency counter, and a RF Signal Generator into one miniature USB device. Incredibly useful in production verification environments and other automated test setups.
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High-Speed, Fiber-Optic Reference Transmitters
Thorlabs' Reference Transmitters are designed for high-speed fiber optic test and measurement applications. They are fully-integrated and user-configurable solutions based on proven lithium niobate (LiNbO3) modulator technology driven by high-fidelity RF amplifiers.
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Frequency Dividers
Precision Test Systems manufacturers' various divider boards as options to its range and frequency standards and distribution amplifiers.
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Voltage References
Renesas' wide selection of voltage reference (Vref) circuits offer accurate and stable reference voltages unaffected by external influences such as variation in temperature, input voltage and time.
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Frequency Large Display Indicator
Signals & Systems India Private Limited
Large Display indicator measures and displays frequency from the input like supply voltage, 4-20mA and data received from other equipment. It meets high accuracy of 0.1% to measure Frequency. The large display is for clear visibility of the frequency reading from long distance. It is equipped with high bright red color 7segment displays. These are commonly used in Power plants, Substations, Manufacturing units and Field environments to provide direct frequency measurements of various devices.
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Audio Frequency Transmitter
TG 600
BAUR Prüf- und Messtechnik GmbH
Cable fault location with the BAUR TG 600. The TG 600 audio frequency transmitter was designed specifically for the precise location of cable faults and joints using the twist method. The display of the input and output current makes selection of the correct adjustment easier.* High-performance audio frequency transmitter up to 600 VA* Frequency of 2 or 10 kHz, quartz-stabilised (other frequencies on request)* Potential-free output* Impedance adjustment in 8 steps from 0.3 to 300 Ω
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3207a GPS/GNS Frequency and Time Reference
GlobalTyme2
Precise Time and Frequency, Inc.
The ptf 3207A GlobalTyme2 GNS Receiver introduces a new level of advanced capability from a second generation, based on the highly successful ptf 3203A and ptf 3204A GlobalTyme receivers.The unit is both a frequency standard and a time standard and has been used as a precision frequency reference with low phase noise, in satellite communications applications around the world.
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Frequency Doubling Comb Generator
COMBGEN6DIFF
*Differential output - can also provide two separate single ended complementary outputs.*Pulse height of up to +4V peak into 50 ohms, on positive output*Pulse height of up to -4V peak into 50 ohms, on negative output*Rise time < 80pS, FWHM of approximately 120pS*Produces pulse on both edges of input clock, thereby doubling frequency.*Input clock may be sinewave from 50MHz to 2GHz or square wave from 5MHz to 2GHz, producing fundamental comb tooth energy from 10MHz to 4GHz.*Usable energy to >10GHz.*Can drive any load, including short, without damage.*Power Requirements: -12V @ 120mA and +24V @ 80mA
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Frequency Up Converters
Are integrated assemblies that convert low frequency RF signals to higher frequency RF signals.
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Radio Frequency (RF) Generators
Find and fix design problems during developmental testing. Viasat’s RF signal environment generation surpasses ordinary simulation and computer modeling techniques to deliver a true-to-life, dense avionics environment for the most accurate analysis of RF communication system performance.
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Reference Transmitter
81491A
Keysight's 81491A Reference Transmitter is designed to offer excellent eye quality for NRZ and PAM4 signals at baud-rates up to 32Gbaud and can serve as universal E/O converter. It comes in Multimode (MM) and Single-Mode (SM) flavors and includes internal lasers at 850nm (MM) or 1310&1550nm (SM). External optical input for usage with tunable laser sources is available for SM option. It is fully integrated into Keysight’s Optical Receiver Stress Test solutions to address test requirements of IEEE 802.3 10,40,100 and 400GBASE optical standards.
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Economic Type Frequency Indicator
CS1-RL
CS1-F economic type Frequency Indicator has been designed with high accuracy measurement, display and communication of Frequency.The innovation feature is auto-range input from 0.01Hz~ 100KHz (option ~140KHz) and the display resolution will auto-change to show the highest according to input frequency.They are also available 1 option of 1 Relay outputs, 1 Analogue output or 1 RS485 (Modbus RTU Mode) interface with versatile functions such as control, alarm, re-transmission or communication for a wide range of panels and testing applications.
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High Frequency Standard Capacitor
GenRad 1403 Series
The GenRad 1403 Standard Air Capacitors are stable, three-terminal standards in decimal values from 0.001 pF to 1000 pF. For measurement at 100 pF and below, a three terminal connection increases the accuracy by eliminating the uncertainty in the measurement introduced by the capacitances between the capacitor terminals and ground.
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Mineral & Geology Reference Materials
NCS Testing Technology Co., Ltd.
Mineral & Geology Standards by NCS
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Online Audio Frequency Signal Generator
WavTones
We are proud to offer not only the best audio frequency signal generator on the net, but also a high-end sound generator, which compares favorably to the more expensive software and hardware tone generators!
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Frequency Generation & Monitoring
Timetech reference generators, phase comparators, and synchronized oscillators.
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High Frequency Transformers
Osborne High Frequency Current Transformers operate at frequencies higher than 50/60 Hertz. Their purpose is to reduce high frequency system currents to lower values that are appropriate for instrumentation and/or protection circuits. They have been designed to meet specified current ratios, and burden impedance at a specified transformation error. One area of unique Osborne expertise is in designing for phase shift when high frequency current transformers are to be used for power measuring applications.
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Resonant Frequency Testing
E-Meter MK II™
Determines resonant frequencies of the three modes of vibration. Material characteristics such as Youngs Modulus of Elasticity, Modulus of Rigidity, Poissons Ratio and Damping Constant can be calculated. Frequencies are automatically scanned in one of four ranges. The system can determine flexural resonance of concrete under accelerated freezing and thawing cycles and aggressive environments.
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Servo Analyzer (Frequency Characteristics Analyzer)
DS-0342
The DS-0342 Servo Analyzer (Frequency Characteristics Analyzer) is a device that measures the transfer function (frequency response function) of control circuits and mechanical structures with high accuracy.It can measure characteristics (phase margin, gain margin) of the control circuit, resonance frequency of the structure, and impedance, etc.This is a PC based servo analyzer that pursues usability with the following functions in addition to "easy-to-use operability" and "diversity of graph display".
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Reference Transmitter
81492A
Keysight's 81492A Reference Transmitter is designed to offer excellent eye quality for NRZ and PAM4 signals at baud-rates up to 56 Gbaud and can serve as universal single-mode E/O converter. In addition to the internal lasers at 1310 & 1550 nm, an external optical input for usage with tunable laser sources is available. It is fully integrated into Keysight’s Optical Receiver Stress Test solutions to address test requirements of IEEE 802.3 10,40,100 and 400GBASE optical standards.
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Frequency Extension Calibration Kits
FEK
Farran’s FEK-xx-0001 calibration kit provides accurate calibration of the Vector Network Analyzer (VNA). It is compatible with TRL and SOLT calibration techniques and allows for a full 12-term port calibration.
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Ultra-Agile Frequency Synthesizer
Corech’s Ultra-Agile Frequency Synthesizer packs impressive low phase noise of -100dBc/Hz@10kHz@20GHz, low spurious of -65dBc, high temperature and corrosion resistance, long operating life, temperature uniformity, and good thermal conductivity. These outstanding performance make it suitable for high-reliability and environmentally stressful applications including communication systems, test and measurement equipment, radar systems etc.
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Voltage References
Analog Devices offers the widest selection of high performance voltage references in the industry. Our products range from high accuracy, low noise for high end industrial applications to general-purpose, low power for handheld, battery-powered applications. ADI is the ultimate source for design engineers looking for the perfect voltage reference that is cost effective, reliable, and dependable.
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Reference Grade Compact Audio Interface
Lyra 2
Lyra represents the pinnacle of compact audio interfaces. Packing Prism Sounds trusted, uncompromising AD/DA conversion into a compact chassis perfect for use in the studio or on the road.
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Remote Radio Head Test, Reference Solution
The Remote Radio Head Test, Reference Solution provides the physical interfaces together with the vector signal analysis and vector signal generation you need to carry out comprehensive functional and performance testing of your RRH). Fully characterize the uplink and downlink, RF air-interface to and from the digital "front-haul".
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Hydrogen Frequency & Time Standard
CH1-1035
Hydrogen frequency and time standard Ch1-1035 is designed for precision storage and reproduction of the size of frequency and time units as part of measures and reference complexes.
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5 Digit Frequency Meter
CM1-F
CM1-F is an economical and simple frequency meter with a 20mm 5-digit LED display, and the display rangecan be set by pressing the button. Anti-interference design, reliable quality, simple installation and operation.At the same time, it has 2 sets of relay output or 1 set of analog output or 1 set of RS485 (Modbus RTU mode) communication ports for selection.The built-in design of the operation buttons can avoid human misoperation and is suitable for various mechanical use.
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Reference Meter
SB1300
Shenzhen Star Instrument Co., Ltd.
The SB1300 three-phase multi-function reference meter incorporates 32-bit floating point DSP, wide-range measuring and embedding industrial PC technologies. This model was the first approved by China National Institute of Metrology. Star Instrument has been granted the first manufacturing license for class 0.02 reference meters. Basic measuring range (phase voltage): 1V~480V, current measuring range: 1mA~120A; wide measuring range (phase voltage): 0.1V~1000V, current measuring range: 0.1mA~200A
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Frequency Response Analyzers
Sleuth RA-Series
The Sleuth RA-Series is at home in any environment as well. It's 1-U high form factor, allows for compact desktop use or, it can be mounted in a rack with optional brackets. When attached to a modest user provided Windows PC (desktop or laptop), it becomes a powerful ally in your toughest design, test or trouble-shooting requirement.
