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.

...
อ่านเพิ่มเติม อ่านน้อยกว่า

คัดกรอง / Filters

กำลังดูสินค้า 1 - 10 รายการจาก 10 รายการ / Viewing 1 - 10 of 10 products
ผลการค้นหาต่อหน้า / Results Per Page
รายละเอียดสินค้า / Description ราคา / Price Maximum Frequency Minimum Frequency Resolution Pulse Width Resolution Attenuation Maximum Internal Counter Minimum Internal Counter Maximum Input Voltage Minimum Input Voltage Input Impedance Measurement Time Connector Type Dimensions Height
RS Stock No. 713-4295
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.53220A
THB95,514.21
Each
Units
350MHz 1 (DC) mHz 12 Digit 40ns - - - 5 V, 50 V -50 V, -5 V 1 MΩ, 50 Ω - BNC 261.2 x 302.2 x 103.8mm 103.8mm
RS Stock No. 457-730
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.PFM3000
Brand :Aim-TTi
THB7,277.72
Each
Units
3GHz 3 Hz 6 Digit - - 188888888 - 30V ac/dc - 1 MΩ, 50 Ω 10s - 178 x 81 x 30mm 30mm
RS Stock No. 665-4919
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.TF930
Brand :Aim-TTi
THB13,962.84
Each
Units
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 88mm
RS Stock No. 713-4286
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.53210A
THB82,912.59
Each
Units
350MHz 1 (DC) MHz 10 Digit 40ns - - - 5 V, 50 V -50 V, -5 V 1 MΩ, 50 Ω - BNC 261.2 x 302.2 x 103.8mm 103.8mm
RS Stock No. 768-3441
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.TF960
Brand :Aim-TTi
THB19,383.60
Each
Units
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 88mm
RS Stock No. 713-4298
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.53230A
THB140,678.04
Each
Units
350MHz 1 (DC) mHz 12 Digit 40ns - - - 5 V, 50 V -50 V, -5 V 1 MΩ, 50 Ω - BNC 261.2 x 302.2 x 103.8mm 103.8mm
RS Stock No. 712-1154
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.FCA3000
Brand :Tektronix
THB114,214.42
Each
Units
300MHz 0.001 Hz 12 Digit 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 90mm
RS Stock No. 136-2966
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BV0011B -1FP
THB8,873.50
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 136-2967
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BV0011B -1TP
THB11,535.59
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 712-1157
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.FCA3100
Brand :Tektronix
THB179,614.36
Each
Units
300MHz 0.001 Hz 12 Digit 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 90mm
Related Products
RS Pro AFG-21000/AFG-21100 AFGs use direct digital synthesis ...
Description:
RS Pro AFG-21000/AFG-21100 AFGs use direct digital synthesis (DDS) to generate signals at precise frequencies through a unique memory access and clocking mechanism. They offer an accurate and affordable signal source covering the output of Sine, Square (Pulse), Ramp (Triangle), ...
RS Pro AFG-21000/AFG-21100 AFGs use direct digital synthesis ...
Description:
RS Pro AFG-21000/AFG-21100 AFGs use direct digital synthesis (DDS) to generate signals at precise frequencies through a unique memory access and clocking mechanism. They offer an accurate and affordable signal source covering the output of Sine, Square (Pulse), Ramp (Triangle), ...
The TGF300 series from Aim-TTi are high performing ...
Description:
The TGF300 series from Aim-TTi are high performing function/arbitrary generators which offer signal generation capability up to 160 MHz. These function generators have two identical full performance channels that can operate independently or in coupled or tracking modes. Precise channel ...
The Aim-TTi TGF4000 series is a two-channel 40MHz ...
Description:
The Aim-TTi TGF4000 series is a two-channel 40MHz function generator that offers key advantages over other models at a reasonable price. This has two full capability channels, which can be operated independently like two separate generators, or in coupled or ...