The SURECOM SF401plus Frequency Counter stands out as an essential tool for those who engage with two-way radios, providing an efficient and reliable means of measuring frequency parameters. With a frequency range of 27MHz to 3000MHz, this portable counter is equipped with advanced capabilities to decode CTCSS and DCS frequencies, making it an invaluable asset for both amateur and professional radio users alike. Designed with usability in mind, the four-button interface enables effortless operation, allowing users to quickly navigate through the various measurement features.
Boasting a sleek black finish, the SF401plus is designed to be both visually appealing and functional. The compact size, weighing just 113 grams, ensures that it can be easily transported anywhere, fitting comfortably into a pocket or bag. The LCD screen features dim level settings, which enhance visibility during operations in varying light conditions. This design consideration is particularly useful for professionals who may need to conduct frequency checks in various environments. Furthermore, the device’s solid build quality guarantees durability, making it a dependable tool to withstand the rigors of fieldwork.
The SURECOM SF401plus operates using a TCXO (Temperature Compensate X'tal Oscillator), achieving an impressive accuracy of ± 2 to ± 4ppm across a temperature range from -45°C to 65°C. This level of precision is vital for users who rely on accurate frequency measurements for their operations. The frequency counter is capable of detecting continuous wave signals emanating from two-way radios, with a response time of approximately 0.2 seconds, ensuring quick and reliable readings. Users have noted its robust performance on a wide array of radios, from older systems that lack a display to those that feature minimal frequency information.
The integrated Li-ion battery adds to the user friendliness of the SF401plus, offering a convenient solution without the hassle of replacing batteries frequently. The USB charging capability, coupled with included accessories such as a USB AC adapter and charging cable, allows users to recharge the device effortlessly whenever needed.
This frequency counter is highly regarded for its ease of use, making it suitable for both beginners and seasoned professionals. Users have reported minimal learning curves, enabling them to quickly grasp its functionality right out of the box. Ideal situations for this device include frequency verification for older radios, assisting in the identification of radio operating frequencies, and ensuring compatibility between devices when setting up new equipment. The added functionality to detect CTCSS and DCS tones proves exceptionally advantageous for users monitoring specific communication channels.
While the SF401plus has garnered praise for its performance, some users did encounter nuances that could affect its output, such as interference from nearby electronic devices like smartphones. Attention to placement during measurement can mitigate these issues, but overall, the consensus remains positive regarding its effectiveness in various settings.
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