{"title":"Frequency Counters","description":"","products":[{"product_id":"keysight-53181a","title":"Keysight \/ Agilent 53181A RF Counter 225 MHz, 10 Digit\/sec","description":"\u003cp\u003e\u003cstrong\u003eKeysight \/ Agilent 53181A RF Counter 225 MHz, 10 Digit\/sec\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 53181A RF counter provides fast, precise results with the core measurements you are likely to need for RF tests. It provides the same signal processing and test automation features as the 53131A and Agilent 53132A universal counters, along with 10 digits\/second resolution. The 53181A offers a single 225 MHz channel standard and you can choose an optional second channel that measures up to 12.4 GHz.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFrequency Range: dc to 225 MHz\u003c\/li\u003e\n\u003cli\u003eFrequency resolution: 10 digits\/s\u003c\/li\u003e\n\u003cli\u003eDynamic range: 20 mV to ±5 Vac (dc to 100 MHz), 30 mV to ±5 Vac (100 to 200 MHz), 40 mV to ±5 Vac (200 to 225 MHz)\u003c\/li\u003e\n\u003cli\u003eInput impedance: 50 ohm or 1 megohm, ac or dc\u003c\/li\u003e\n\u003cli\u003eInternal time base stability (aging rate): 10 MHz, \u0026lt;3 X 10-7th\/month (\u0026lt;1.55 X 10-8th\/month with option 010), (\u0026lt;3 X 10-9th\/month with option 012)\u003c\/li\u003e\n\u003cli\u003eGPIB (IEEE-488) and RS-232 (talk only) interfaces\u003c\/li\u003e\n\u003cli\u003e100-120 Vac ±10%; 50, 60, 400 Hz ±10% \/ 220, 240 Vac ±10%; 50, 60 Hz ±10% operation\u003c\/li\u003e\n\u003cli\u003eWeight: 7 lb; Size: 89 mm (3.5 in)H x 213 mm (8.35 in)W x 348 mm (13.7 in)D\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease see Datasheet for complete details and specifications.\u003c\/p\u003e","brand":"Keysight \/ Agilent","offers":[{"title":"Default Title","offer_id":52537729188183,"sku":"KTA53181A-010-124","price":1.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/9389\/0135\/files\/KTA53181A.jpg?v=1768380562"},{"product_id":"stanford-research-sr620","title":"Stanford Research SR620 Time Interval \/ Frequency Counter","description":"\u003cp\u003e\u003cstrong\u003eStanford Research SR620 Time Interval \/ Frequency Counter, 0.001 Hz to 1.3 GHz\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe SR620 measures time interval, frequency, pulse width, rise and fall time, period, phase, and events. Time intervals are measured with 25 ps rms resolution, making the SR620 one of the highest-resolution counters available. Frequency is measured from 0.001 Hz to 1.3 GHz, and a choice of gates ranging from 1 period to 500 seconds is provided. The SR620 delivers up to 11 digits of frequency resolution in a 1-second measurement. It's suitable for measurement applications ranging from short-term phase locked loop jitter to long-term drift of atomic clocks. All measurement modes are supported by a wide variety of flexible arming and triggering options.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003c\/li\u003e\n\u003cli\u003e25 ps single-shot time resolution\u003c\/li\u003e\n\u003cli\u003eFrequency Range: 1.3 GHz\u003c\/li\u003e\n\u003cli\u003e11-digit Frequency resolution (1 s)\u003c\/li\u003e\n\u003cli\u003ePhase resolution: 0.001°\u003c\/li\u003e\n\u003cli\u003eStatistical analysis \u0026amp; Allan variance\u003c\/li\u003e\n\u003cli\u003eGraphical output to XY scopes\u003c\/li\u003e\n\u003cli\u003eTimebase (10.000 MHz): 1x10-6\/year; 5x10-10\/day with option 01\u003c\/li\u003e\n\u003cli\u003eGPIB (IEEE-488) and RS-232 interfaces\u003c\/li\u003e\n\u003cli\u003eDisplay: LED\u003c\/li\u003e\n\u003cli\u003e100\/120\/220\/240 VAC (+5 %, -10 %), 50\/60 Hz operation\u003c\/li\u003e\n\u003cli\u003eWeight: 11 lb; Size: 89 mm (3.5 in)H x 356 mm (14.0 in)W x 356 mm (14.0 in)D\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease see Datasheet for complete details and specifications.\u003c\/p\u003e","brand":"Stanford Research","offers":[{"title":"S.R.S. SR620-01 Frequency Counter w\/high stability OCXO timebase","offer_id":52537739215191,"sku":"SRSSR620-01","price":3195.0,"currency_code":"USD","in_stock":true},{"title":"S.R.S. SR620 Frequency Counter","offer_id":52537739247959,"sku":"SRSSR620","price":2395.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/9389\/0135\/files\/SRSSR620-2.jpg?v=1768380693"},{"product_id":"used-keysight-agilent-53230a-universal-frequency-counter-timer","title":"Used Keysight\/Agilent 53230A Universal Frequency Counter\/Timer,","description":"\u003ch3\u003eKeysight-Agilent 53230A\u003c\/h3\u003e\n\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003e\u003cb\u003e350 MHz Universal Frequency Counter\/Timer, 12 digits\/s, 20 ps\u003c\/b\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eThe Agilent 53230A universal frequency counter\/timer serves all your frequency and time interval measurement needs. In addition to the typical frequency and time interval measurements, continuous\/gap-free measurements are available for basic modulation domain analysis. Optional burst measurement software is available. An optional microwave channel can be added to measure 6 or 15 GHz.\u003cbr\u003e\u003cbr\u003eSpecifications\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTwo 350 MHz input channels, plus optional third channel (6 GHz or 15 GHz)\u003c\/li\u003e\n\u003cli\u003e12 digits\/second resolution, 20 psec time interval resolution\u003c\/li\u003e\n\u003cli\u003eBuilt-in math analysis and color, graphical display (trend and histogram)\u003c\/li\u003e\n\u003cli\u003eContinuous, gap-free measurements and timestamps for basic modulation domain analysis\u003c\/li\u003e\n\u003cli\u003eLXI-C\/LAN, USB, GPIB\u003c\/li\u003e\n\u003cli\u003eOptional: Lithium Ion Battery\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TSD Electronic Store","offers":[{"title":"Default Title","offer_id":53000167063895,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/9389\/0135\/files\/53230A.jpg?v=1773373396"},{"product_id":"agilent-keysight-53230a-350-mhz-universal-frequency-counter-timer-12-digits-s","title":"Agilent\/keysight  53230A 350 MHz Universal Frequency Counter\/Timer, 12 digits\/s","description":"\u003cp class=\"product-title-text\"\u003eThe 53230A is a 2 channel frequency counter with the ability to make frequency and time interval measurements as well as continuous and gap-free measurements.\u003c\/p\u003e","brand":"TSD Electronic Store","offers":[{"title":"Default Title","offer_id":53041723965783,"sku":null,"price":1.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/9389\/0135\/files\/53230A_ed64fb53-b6f5-4ddb-8d79-0c8fa61a493d.jpg?v=1773818070"},{"product_id":"used-hp-agilent-5071a-primary-frequency-standard","title":"Used HP\/Agilent 5071A Primary Frequency Standard","description":"\u003cp\u003eThe 5071A uses a fundamental property of the element cesium to define frequency.\u003cbr\u003eInside the cesium beam tube assembly, an applied microwave signal causes\u003cbr\u003eenergy-level transitions to occur in the cesium atoms. The microwave signal is synthesized from a 10 MHz voltage-controlled crystal oscillator (VCXO). Patented Cesium II\u003cbr\u003ecircuit and software technology detects departures of the microwave frequency from\u003cbr\u003ethe cesium energy-level transition frequency and corrects them by tuning the VCXO to\u003cbr\u003erun precisely at the proper rational-fraction of the cesium frequency. The microprocessor (an integral part of this servo loop) performs the error determination and correction\u003cbr\u003eseveral times a second to ensure that the VCXO is always closely locked to the\u003cbr\u003ecesium-transition frequency.\u003cbr\u003eMany functions within the 5071A are under Cesium II software control. The software\u003cbr\u003emanages the initial warm-up and alignment, then continuously monitors the appropriate signals using this information to control all key operating parameters for optimum\u003cbr\u003eperformance. Starting the 5071A merely requires connecting AC or DC power.\u003cbr\u003eAfter a typical warm-up time of 15 minutes, the standard is fully operational and the\u003cbr\u003eoperator may optionally press three keys to display a continuous operation signal.\u003cbr\u003eThere are no maintenance procedures or adjustments needed even when necessary\u003cbr\u003eto replace the cesium beam tube. The 5071A\u003c\/p\u003e","brand":"TSD Electronic Store","offers":[{"title":"Default Title","offer_id":53259934662999,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/9389\/0135\/files\/HP5071A.jpg?v=1775534764"},{"product_id":"audio-sweeper-model-7116c-audio-frequency-sweeper","title":"AUDIO SWEEPER MODEL-7116C Audio frequency sweeper","description":"\u003cp\u003e7116C provides pure sine wave with very low total harmonic distortion. (approx. 0.1%\u003cbr\u003eTHD ). The total harmonic distortion of 7116C consists of 2nd Harmonic component only\u003cbr\u003eand nearly without higher order harmonic components. So, 7116C is very suitable to test\u003cbr\u003ethe sound quality ( spurious noise inspection ) of all kinds of loudspeaker, headphone,\u003cbr\u003ereceivers, piezo, speakers system…etc.\u003cbr\u003eThe frequency produced by 7116C is more stable than the ordinary beat frequency\u003cbr\u003eoscillator produced. and the sine wave provided by 7116C is purer than the ordinary\u003cbr\u003efunction generator. Therefore, 7116C has both advantages of low distortion and high\u003cbr\u003estability. do not use the ordinary function generator to test the spurious noise ( rattle\u003cbr\u003eand buzz ) of loudspeaker, loudspeaker, receiver, etc.… Because user will easily neglect\u003cbr\u003ethe prohibited spurious noise caused originally from the high order distortion component\u003cbr\u003eof the function generator.\u003cbr\u003e1. Power: power switch \u0026amp; indicator\u003cbr\u003e2. Fo: The lowest resonant frequency Fo test pushbutton.\u003cbr\u003e3. Start: By depressing this button, The desired start frequency can be set by adjusting\u003cbr\u003ethe coarse knob (5) and fine knob (6) of 〝 Start 〞. the start frequency can\u003cbr\u003ebe set in the range of 20Hz to 20KHz. the frequency will be displayed on\u003cbr\u003e〝 Frequency Counter (14) 〞in the front panel.\u003cbr\u003e4. Stop: By depressing this pushbutton, The stop frequency can be set adjusting the\u003cbr\u003estop knob (7). The stop frequency also can be set in the range of 20Hz to\u003cbr\u003e20KHz and can be displayed on 〝 Frequency Counter (14) 〞in the panel. \u003c\/p\u003e\n\u003cp\u003e5. Coarse ( Start ) : The coarse knob of start adjustment for setting the start frequency.\u003cbr\u003ePlease depress the start pushbutton before adjusting the coarse\u003cbr\u003eknob.\u003cbr\u003e6. Fine ( Start ): The fine knob of start adjustment for setting the start frequency.\u003cbr\u003eThis knob is convenience for researching the lowest resonant\u003cbr\u003efrequency because the frequency variation is tiny.\u003cbr\u003e7. Stop: The stop knob of stop adjustment for setting the stop frequency.\u003cbr\u003eRemember to set the stop frequency always higher than the start\u003cbr\u003efrequency.\u003cbr\u003e8. Auto \/ Manu: When depressing the button, The output signal of 7116C will\u003cbr\u003esweep forth and back automatically between the range set by the\u003cbr\u003estart adjustment knobs and stop adjustment knob. If button (3) or\u003cbr\u003e(4) is depressed, The 7116C will output a signal of constant\u003cbr\u003efrequency by adjusting start knobs or stop knob, And 7116C will\u003cbr\u003ebe functioned as a manual sweep generator.\u003cbr\u003e9. Sweep: Sweep time control knob with scale in second. Sweep time is\u003cbr\u003econtinuously adjustable in the range of 0.3 sec. to 40 sec.\u003cbr\u003e10. Coarse ( Volume ): For adjusting the output voltage in great variation.\u003cbr\u003e11. Fine ( Volume ): For adjusting the output voltage in small variation.\u003cbr\u003e12. Output: The output terminals to the tested item.\u003cbr\u003e13. Output Voltage Meter: A digital autoranging R.M.S. voltage meter indicating the\u003cbr\u003evoltage from the output terminal.\u003cbr\u003e14. Frequency: 4 digits display, 20Hz∼20KHz, Resolution: 1 Hz counter. \u003c\/p\u003e","brand":"TSD Electronic Store","offers":[{"title":"Default Title","offer_id":53278806606167,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/9389\/0135\/files\/Sweeper7116C.jpg?v=1775814979"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/9389\/0135\/collections\/Frequency_Counters.jpg?v=1772608776","url":"https:\/\/www.tsdwelltest.com\/collections\/frequency-counters\/frequency--counter.oembed","provider":"TSD Welltest Solution","version":"1.0","type":"link"}