Frequency Counters

What is a Frequency Counter?

A frequency counter is an electronic instrument that is used for measuring frequency. They usually measure the number of oscillations or pulses per second in a periodic electronic signal. The frequency counter is simple to use, you just turn the counter on and apply the signal to the input. They can be used for measuring many signals from digital logic signals to RF and microwaves.

General guidelines on using a Frequency Counter

• Do not overload input: This may occur when using some RF frequency counters that may have a 50Ω input.
• Keep frequency counter time-base / clock warm: The time-base of clock within a frequency counter governs the overall accuracy of the instrument.
• Requires accurate time-base: As the accuracy of the time-base directly reflects onto the accuracy of the measurement, it is necessary to use an instrument with an accurate time-base, or use an external one that is very accurate.
• Calibrate: With various aspects such as crystal ageing that affects even the most accurate crystal- based clock oscillators or time-bases, it is necessary to ensure that the time-base frequency is maintained as accurately as possible and all other functions are operating within their specified ranges.
• For noisy signals, pay attention to trigger error: When using a frequency counter or timer with a noisy signal, the noise can cause spurious counts which affects the reading.
• Lock all time-bases to a single clock: When a system uses several time-bases, there are possibilities of uncertainty between the signals that can cause some inaccuracies. To overcome this, it is often wise to lock all the elements of a system to a single accurate time-base.
Applications include:
• Measuring the frequency of a transmitter carrier
• Measuring the frequency of an oscillator in a circuit
• Measure the frequency of a signal on a line
• Any application where the frequency of a steady repetitive signal needs to be measured
To be able to measure the frequency of an RF signal using a frequency counter there are a few prerequisites.
• Frequency must be steady, i.e. not varying
• The signal should not have modulation applied as this prevents proper counting
• Signal must have sufficient amplitude – typically signals over about half a volt are suitable
• Signals should not be so large that they overload the input
Frequency counters are an easy to use test instrument, have few problems and give accurate results.

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Description Prix Maximum Frequency Minimum Frequency Resolution Calibrated Pulse Width Resolution Attenuation Maximum Internal Counter Minimum Internal Counter Maximum Input Voltage Minimum Input Voltage Input Impedance Measurement Time Connector Type Dimensions
N° de stock RS 498-753
Référence fabricantPFM3000
MarqueAim-TTi
286,50 €
Each
Unité
3GHz 3 Hz 6 Digit UKAS - - 188888888 - 30V ac/dc - 1 MΩ, 50 Ω 10s - 178 x 81 x 30mm
N° de stock RS 487-864
Référence fabricantPFM3000
MarqueAim-TTi
243,00 €
Each
Unité
3GHz 3 Hz 6 Digit RSCAL - - 188888888 - 30V ac/dc - 1 MΩ, 50 Ω 10s - 178 x 81 x 30mm
N° de stock RS 457-730
Référence fabricantPFM3000
MarqueAim-TTi
173,00 €
Each
Unité
3GHz 3 Hz 6 Digit - - - 188888888 - 30V ac/dc - 1 MΩ, 50 Ω 10s - 178 x 81 x 30mm
N° de stock RS 622-3265
Référence fabricantHM8123
1.700,00 €
Each
Unité
3GHz 0 Hz 10 Digit - 5ns 1:1, 1:10, 1:100 - - 250 V, 5 V - 1 MΩ, 50 Ω - BNC, SMA 365 x 285 x 75mm
N° de stock RS 192-5828
Référence fabricantHM8123
1.770,00 €
Each
Unité
3GHz 0 Hz 10 Digit RSCAL 5ns 1:1, 1:10, 1:100 - - 250 V, 5V - 1 MΩ, 50 Ω - BNC, SMA 365 x 285 x 75mm
N° de stock RS 192-5829
Référence fabricantHM8123
1.813,50 €
Each
Unité
3GHz 0 Hz 10 Digit UKAS 5ns 1:1, 1:10, 1:100 - - 250 V, 5V - 1 MΩ, 50 Ω - BNC, SMA 365 x 285 x 75mm
N° de stock RS 668-1585
Référence fabricantTF930
MarqueAim-TTi
479,50 €
Each
Unité
- - - - - - - - - - - - - -
N° de stock RS 713-4295
Référence fabricant53220A
2.462,00 €
Each
Unité
350MHz 0 Hz 12 Digit - 40ns - - - 5 V, 50 V -50 V, -5 V 1 MΩ, 50 Ω - BNC 261.2 x 302.2 x 103.8mm
N° de stock RS 810-6314
Référence fabricantTF930
MarqueAim-TTi
479,50 €
Each
Unité
3GHz 0.001 Hz 10 Digit UKAS 20ns 1:1, 5:1 9999999999 1 30V ac/dc - 1 MΩ, 50 Ω - - 235 x 260 x 88mm
N° de stock RS 810-6305
Référence fabricantTF930
MarqueAim-TTi
436,00 €
Each
Unité
3GHz 0.001 Hz 10 Digit RSCAL 20ns 1:1, 5:1 9999999999 1 30V ac/dc - 1 MΩ, 50 Ω - - 235 x 260 x 88mm
N° de stock RS 768-3441
Référence fabricantTF960
MarqueAim-TTi
491,00 €
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6GHz 0.001 Hz 10 Digit - 20ns 1:1, 5:1 9999999999 1 30V - 1 MΩ, 50 Ω 100s Type-N 260 x 235 x 88mm
N° de stock RS 712-8953
Référence fabricant53220A
2.532,00 €
Each
Unité
350MHz 0 Hz 12 Digit RSCAL 40ns - - - 5 V, 50 V -50 V, -5 V 1 MΩ, 50 Ω - BNC 261.2 x 302.2 x 103.8mm
N° de stock RS 668-1582
Référence fabricantTF930
MarqueAim-TTi
436,00 €
Each
Unité
- - - - - - - - - - - - - -
N° de stock RS 665-4919
Référence fabricantTF930
MarqueAim-TTi
366,00 €
Each
Unité
3GHz 0.001 Hz 10 Digit - 20ns 1:1, 5:1 9999999999 1 30V ac/dc - 1 MΩ, 50 Ω - - 235 x 260 x 88mm
N° de stock RS 766-3493
Référence fabricantTF960
MarqueAim-TTi
604,50 €
Each
Unité
6GHz 0.001 Hz 10 Digit UKAS 20ns 1:1, 5:1 9999999999 1 30V - 1 MΩ, 50 Ω 100s Type-N 260 x 235 x 88mm
N° de stock RS 766-3490
Référence fabricantTF960
MarqueAim-TTi
561,00 €
Each
Unité
6GHz 0.001 Hz 10 Digit RSCAL 20ns 1:1, 5:1 9999999999 1 30V - 1 MΩ, 50 Ω 100s Type-N 260 x 235 x 88mm
N° de stock RS 712-8956
Référence fabricant53220A
2.575,50 €
Each
Unité
350MHz 0 Hz 12 Digit UKAS 40ns - - - 5 V, 50 V -50 V, -5 V 1 MΩ, 50 Ω - BNC 261.2 x 302.2 x 103.8mm
N° de stock RS 711-8899
Référence fabricantFCA3000
MarqueTektronix
2.540,00 €
Each
Unité
300MHz 0.001 Hz 12 Digit RSCAL 1.6ns 1:10 - - 5 V, 50 V -50 V, -5 V 1 MΩ, 50 Ω 250ksps BNC, SMA, Type-N Female 395 x 210 x 90mm
N° de stock RS 712-8947
Référence fabricant53210A
2.250,50 €
Each
Unité
350MHz 0 Hz 10 Digit UKAS 40ns - - - 5 V, 50 V -50 V, -5 V 1 MΩ, 50 Ω - BNC 261.2 x 302.2 x 103.8mm
N° de stock RS 711-8903
Référence fabricantFCA3100
MarqueTektronix
3.910,00 €
Each
Unité
300MHz 0.001 Hz 12 Digit RSCAL 1.6ns 1:10 - - 5 V, 50 V -50 V, -5 V 1 MΩ, 50 Ω 250ksps BNC, SMA, Type-N Female 395 x 210 x 90mm