Bench / Free-Standing Frequency Counters
Last Updated: April 1, 2025
Description
Bench or free-standing frequency counters are electronic instruments designed to measure the frequency of an input signal. They provide precise digital readings of frequency, which can range from a few hertz (Hz) to several gigahertz (GHz), depending on the model and specifications of the device. These counters typically feature a digital display that shows the frequency measurement, and they may include additional functionalities such as multiple channels for measuring different signals simultaneously.
Working Principle
Frequency counters operate on the principle of gating the input frequency into the counter for a predetermined time period. During this time, the counter counts the number of cycles of the input signal. The frequency is then calculated by dividing the number of cycles by the time period. This method allows for highly accurate frequency measurements. The precision of these devices makes them useful for a variety of applications, as they can provide detailed insights into the characteristics of electronic signals.
Applications
Bench frequency counters are widely used in various fields. For example, they are essential in the calibration of signal generators, which do not have their own frequency displays. They are also used in research and development settings to characterize the frequency of transmitters and receivers, ensuring compliance with regulatory standards. Additionally, they find applications in manufacturing environments where high throughput and precision are required.
Advantages over other Frequency Counters
Bench frequency counters offer several advantages over other types of frequency counters, such as handheld models. They typically provide higher precision and can measure a broader range of frequencies. For instance, while handheld devices are limited by their size and power source, bench models can be powered from a wall outlet, allowing for more robust and continuous operation. They also often feature more advanced functionalities, such as multiple channels and digital outputs like USB or RS232, which enhance their versatility and integration into complex systems.
Limitations
Despite their advantages, bench frequency counters have limitations. They can be more expensive than handheld models, both in terms of initial purchase cost and maintenance. Their larger size and need for a stable power source can also limit their portability and flexibility in certain environments. Additionally, while they offer high precision, the accuracy of measurements can be affected by the quality of the input signal, such as its noise level.
Considerations
When selecting a bench frequency counter, several factors should be considered. Initial costs can vary significantly depending on the frequency range and additional features. Operating expenses may include calibration and maintenance, which are necessary to ensure continued accuracy and reliability. Durability is another important factor, as these devices are often used in demanding environments. Accuracy is paramount, so it's crucial to choose a model that meets the specific requirements of the intended application. Finally, consider the potential costs associated with replacement and maintenance, as these can impact the long-term value of the investment.
from Rohde & Schwarz USA, Inc.
Measurement range: DC to 3 GHz. Input A/B (BNC): DC to 200 MHz. Input C (SMA): 100 MHz to 3 GHz. Input impedance A/B: 50 Ω or 1 M Ω (switchable), sensitivity 25 mV. Input impedance C: 50 Ω, sensitivity 30 mV. 10-digit resolution (at 10 s gate time). Nine measurement functions,... [See More]
- Form Factor: Bench top
- Display Type: Digital
- Frequency Range: 0.0 to 3.00E9
- Display Digits: 7 or more digits
from Red Pitaya, d.o.o.
SDRlab 122-16 External clock is based on the SDRlab 122-16 model that is modified to be used with an external clock oscillator, which is important especially for RF applications that operate at other frequencies, require better quality clock or clock synchronization. [See More]
- Form Factor: Bench top; Rack mount (optional feature); Handheld (optional feature); Computer Board
- Max Channels: 4
- Frequency Range: 1 to 6.25E7
- Sampling Rate: 123
from B&K Precision
The model 1823A is a reciprocal 2.4GHz universal frequency counter that is microprocessor controlled. The LED display can provide nine digits of resolution using the internal 10s gate time. The high accuracy, sensitivity and versatility of this counter make it an extremely valuable instrument to... [See More]
- Form Factor: Bench top
- Display Type: Digital
- Frequency Range: 2.40E9
- Display Digits: 7 or more digits
from Madell Technology Corporation
1.0 GHz Frequency Counter [See More]
- Form Factor: Bench top
- Display Type: Digital
- Frequency Range: 1.00E9
from Tektronix, Inc.
The Tektronix FCA and MCA Series frequency counter / timer / analyzer packs the functionality of a frequency counter, frequency meter and timer into one feature-rich instrument. With unprecedented resolution, you can capture very small frequency and time changes. Tektronix frequency counters and... [See More]
- Form Factor: Bench top
- Max Channels: 2 to 3
- Frequency Range: 3.00E8 to 4.00E10
- Display Type: Digital
from Red Pitaya, d.o.o.
SDRlab 122-16 was developed specifically for software-defined radio and more demanding RF applications. [See More]
- Form Factor: Bench top; Rack mount (optional feature); Handheld (optional feature); Computer Board
- Max Channels: 4
- Frequency Range: 1 to 6.25E7
- Sampling Rate: 123
from B&K Precision
The 1803D is a value-priced frequency counter offering users a simple and accurate frequency measurement. Selectable gate times 0.1 sec and 1.0 sec. 7 digit LED display. Highly accurate time base. Compact benchtop AC powered counter*. Wide Measuring range up to 200 MHz. cUL certified [See More]
- Form Factor: Bench top
- Display Type: Digital
- Frequency Range: 2.00E8
- Display Digits: 7 or more digits
from Madell Technology Corporation
2.7 GHz Frequency Counter [See More]
- Form Factor: Bench top
- Display Type: Digital
- Frequency Range: 2.70E9
from Red Pitaya, d.o.o.
SIGNALlab 250-12 is most sophisticated Red Pitaya product, built for more demanding industrial applications and research, where robustness and performance matter more than cost. [See More]
- Form Factor: Bench top; Rack mount (optional feature); Handheld (optional feature); Computer Board
- Max Channels: 4
- Frequency Range: 1 to 6.25E7
- Sampling Rate: 250
from B&K Precision
The model 1856D provides versatility and reliability for a broad spectrum of laboratory and service applications. RS232 Interface. Wide measuring range up to 3.5GHz nine digit LED display. Period mode for accurate low frequency measurement. Totalize mode permits counting of individual events. [See More]
- Form Factor: Bench top
- Display Type: Digital
- Frequency Range: 3.50E9
- Display Digits: 7 or more digits
from Madell Technology Corporation
Instek GFC-8010H - Digital FrequencyCounter [See More]
- Form Factor: Bench top
- Display Type: Digital
from Red Pitaya, d.o.o.
STEMlab 125-14 4 Inputs is based on STEMlab 125-14 board, but instead of 2 inputs and 2 output channels offers 4 Input channels that with improved performance. [See More]
- Form Factor: Bench top; Rack mount (optional feature); Handheld (optional feature); Computer Board
- Max Channels: 4
- Frequency Range: 1 to 6.25E7
- Sampling Rate: 125
from Madell Technology Corporation
Instek GFC-8131H - Intelligent Counter [See More]
- Form Factor: Bench top
- Display Type: Digital
from Red Pitaya, d.o.o.
STEMlab 125-14 is our most versatile and popular product, which was introduced to the market in 2013 when Red Pitaya was established. Since then it has been used in a wide variety of contexts, from hobbyists and ham radio operators to industry, research, and space applications. [See More]
- Form Factor: Bench top; Rack mount (optional feature); Handheld (optional feature); Computer Board
- Max Channels: 4
- Frequency Range: 1 to 6.25E7
- Sampling Rate: 125