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Frequency Counters

measure frequency by comparing the signal to the counter's time base oscillator.

See Also: Universal Counters, Time Interval Counters


Showing results: 121 - 133 of 133 items found.

  • cDAQ-9188, 8‑Slot, Ethernet CompactDAQ Chassis

    781424-01 - NI

    8‑Slot, Ethernet CompactDAQ Chassis - The cDAQ‑9188 is a CompactDAQ Ethernet chassis designed for small, distributed sensor measurement systems. The chassis controls the timing, synchronization, and data transfer between C Series I/O modules and an external host. You can use this … chassis with a combination of C Series I/O modules to create a mix of analog I/O, digital I/O, and counter/timer measurements. The chassis also has four 32‑bit general‑purpose counters/timers. You can access these counters through an installed, hardware‑timed digital C Series module for applications that involve quadrature encoders, PWM, event counting, pulse train generation, and period or frequency measurement.

  • cDAQ-9181, 1‑Slot, Ethernet CompactDAQ Chassis

    782052-01 - NI

    1‑Slot, Ethernet CompactDAQ Chassis - The cDAQ‑9181 is a CompactDAQ Ethernet chassis designed for small, distributed sensor measurement systems. The chassis controls the timing, synchronization, and data transfer between C Series I/O modules and an external host. You can use this chassis with a combination of C Series I/O modules to create a mix of analog I/O, digital I/O, and counter/timer measurements. The chassis also has four 32‑bit general‑purpose counters/timers. You can access these counters through an installed, hardware‑timed digital C Series module for applications that involve quadrature encoders, PWM, event counting, pulse train generation, and period or frequency measurement.

  • cDAQ-9181, 1‑Slot, Ethernet CompactDAQ Chassis

    781496-01 - NI

    1‑Slot, Ethernet CompactDAQ Chassis - The cDAQ‑9181 is a CompactDAQ Ethernet chassis designed for small, distributed sensor measurement systems. The chassis controls the timing, synchronization, and data transfer between C Series I/O modules and an external host. You can use this chassis with a combination of C Series I/O modules to create a mix of analog I/O, digital I/O, and counter/timer measurements. The chassis also has four 32‑bit general‑purpose counters/timers. You can access these counters through an installed, hardware‑timed digital C Series module for applications that involve quadrature encoders, PWM, event counting, pulse train generation, and period or frequency measurement.

  • Handheld Digital Multimeter, 4.5 digit, up to 800 hours battery life

    U1282A - Keysight Technologies

    60,000 counts resolution on dual display0.025% basic DC voltage accuracy Longer battery life up to 800 hours Certified to IP 67 for dust and water protection Tested to withstand a 3-meter (10-ft) drop Programmable via USB (Download Programming Guide here)CAT III 1000 V/ CAT IV 600 V overvoltage protection Vsense for non-contact voltage detection Square wave output for generating pulse width modulation (PWM) signal Frequency counter Low pass filter

  • Mini Receiver

    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.

  • Large-Displacement Low-Frequence Vibration System

    9363-LN-100 - King Design Industrial Co., Ltd.

    This tester is designed to assess the damage made to product packaging and internal objects caused from transporting environment; to discover the packaging flaw and product’s early failure from a long-term cumulative vibration fatigue; avoid man-made transporting damage and improve product’s reliability and quality of delivered products. With the use of high-performance foot absorber, the resonance effect to floor caused by the bounce test may be waived; and can reduce the pile’s destruction to industrial plants. Two displays can make comparative display on both frequency and rpm at the same time; thus no need to switch in order to read these two values. The dual-control mode of time accumulator and counter can avoid human error resulting from the conversion. Easy to operate; no need for complicate training program.

  • Function Generators

    C&C Instruments Co.

    Waveform : Sine, Triangle, Square, Pulse, Sawtooth, Ramp 0.2Hz-150MHz EXT Frequency Counter(Option : 1:6 GHz or 2.7GHz) Self made insert ASIC Function : Total, RPM, Period, LPF, COUPL(AC/DC), ATT(X10) Fast,High-Resolution, 8Digits LED display Internal or External AM,FM Modulation Internal or External Burst and Linear Sweep Countrol from 1 : 1 to 100:1 TTL/CMOS Leveled Square Wave Output Maximum Attenuation of 20 dB cna be obtained Output impedance : 50 INPUT SENSITMTYKHz Range : 100mVms, MHz Range : 300mVms SWEEP WIDTH : Variable from 1:1 -100:1 RATE : 0.5Hz - 50Hz(20ms-2s) INTERNAL : Linear Bilt-in 5digits Green LED display

  • cDAQ-9184, 4‑Slot, Ethernet CompactDAQ Chassis

    782069-01 - NI

    4‑Slot, Ethernet CompactDAQ Chassis - The cDAQ‑9184 is a CompactDAQ Ethernet chassis designed for small, remote, or distributed sensor measurement systems. The chassis controls the timing, synchronization, and data transfer between C Series I/O modules and an external host. You can use a combination of modules to create a mix of analog I/O, digital I/O, and counter/timer measurements. The chassis also has four 32‑bit general‑purpose counters/timers built in. You can access these counters through an installed, hardware‑timed digital C Series module for applications that involve quadrature encoders, PWM, event counting, pulse train generation, and period or frequency measurement. With multiple timing engines, you can run seven hardware‑timed operations simultaneously, with three independent rates for analog input.

  • cDAQ-9191, 1‑Slot, Ethernet and 802.11 Wi‑Fi CompactDAQ Chassis

    781497-01 - NI

    1‑Slot, Ethernet and 802.11 Wi‑Fi CompactDAQ Chassis - The cDAQ‑9191 is a Wi‑Fi chassis designed for small, remote, or distributed sensor measurement systems. The chassis controls the timing, synchronization, and data transfer between C Series I/O modules and an external host. You can use this chassis with a combination of modules to create a mix of analog I/O, digital I/O, and counter/timer measurements. You can send data from the cDAQ‑9191 to a host PC over Ethernet or IEEE 802.11 Wi‑Fi. The chassis also has four 32‑bit general‑purpose counters/timers built in. You can access these counters through an installed, hardware‑timed digital C Series module for applications that involve quadrature encoders, PWM, event counting, pulse train generation, and period or frequency measurement.

  • Handheld RF Spectrum Analyzer With 1MHz To 1.3 Or 2.7GHz Bandwidth Options

    PSA Series 3 - Aim-TTi

    1MHz to 1300MHz or 2700MHz frequency rangeResolution bandwidths of 300Hz to 10MHz 1:3:10-105dBm typical noise floor at -40dBm reference levelMeasurement in dBm or dBμV, mV or μWZero span mode with AM and FM audio demodulationTrace modes of normal, peak hold and trace averageLive, View (copy) and Reference traces in contrasting coloursTwin markers with readout of absolute & difference valuesSmart marker movement with selectable peak trackingFrequency counter with 10Hz ResolutionFrequency presets and independent state storageAuto-find automatically sets sweep parameters for the highest signal foundUnlimited storage for waveforms, set-ups and screensUser assignable file names, file stamping from real-time clockUSB interfaces for Flash drives and PC connectionComprehensive status and context sensitive help screensMore than 3 hours continuous operation from a chargeSmaller and lighter than other spectrum analyzers (weight only 0.58 kg)

  • Handheld RF Spectrum Analyzer With 10MHz To 3.6 Or 6.0GHz Bandwidth Options

    PSA Series 5 - Aim-TTi

    10MHz to 3600MHz or 6000MHz frequency rangeResolution bandwidths from 300Hz to 10MHz (1:3:10)-120dBm typical noise floor at -40dBm ref. level/10kHz RBWMeasurement in dBm or dBµV, mV or µWZero span mode with AM and FM audio demodulationTrace modes of normal, peak hold and trace averageLive, View and Reference traces in contrasting coloursTwin markers with readout of absolute & difference valuesSmart marker movement with selectable peak trackingFrequency counter with down to 10Hz resolutionFrequency presets and independent state storageAuto-find automatically sets sweep parameters for the highest signal foundUnlimited storage for waveforms, set-ups and screensUser assignable file names, file stamping from real-time clockUSB interfaces for Flash drives and PC connectionComprehensive status and context sensitive help screensRechargeable lithium ion battery giving more than 3 hours continuous operation from a chargeSmaller and lighter than other spectrum analyzers (weight only 0.56 kg)

  • High-speed USB DAQ System

    Model DI-4208 - DATAQ Instruments, Inc.

    USB Data Acquisition (DAQ) System. Eight armored analog differential inputs*. Programmable range per channel: ±2, 5, 10, 20, 50 100 V full scale. Up to 120 V rms without damage. 50 dB common mode rejection. Supports ChannelStretch™ multi-unit synchronization*. Adaptable low-pass filter per channel. Corner frequency set as a function of sampling rate. 16-bit analog-to-digital resolution. 160 kHz analog sample throughput rate. Seven digital ports*. Programmable per port as input or switch. Support for rate measurements to 50 kHz. Support for 16-bit counter.

  • 6000 Series Digital I/O Modules

    Pacific Instruments, Inc.

    Series 6000 digital I/O modules record signals from frequency counters, flow meters, encoders, discrete transducers, IRIG time, etc. which are often part of the test environment. These digital signals are time aligned and recorded alongside the system’s analog measurements. High density digital inputs provide an opportunity to easily include facility controls like switches, valve positions, relays, lights, etc. along with the test data. Series 6000 digital I/O modules also provide outputs generated by user command or automatically by Sequence, Alarms or DSP. User generated outputs are accomplished in software while sequencers can be programmed prior to a test and initiated by program or hardware control. Alarm conditions preprogrammed on the analog side can automatically generate digital outputs which are typically connected to facility control systems or PLCs. A DSP adds powerful real-time processing and is appropriate for PID control loops, derived parameter calculations and a variety of other real-time operations.

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