1. High-Precision Frequency Measurement: The RF Frequency Counter, powered by 's PIC16F648A, provides accurate frequency measurement up to 2.4 GHz. It utilizes a temperature-compensated voltage-controlled crystal oscillator (2.5 ppm -TCXO) as its frequency reference, ensuring reliable and precise measurements. 2. Unique Gate Control and Time Algorithm: Featuring a unique gate control method and precise time algorithm (non-timed interrupt mode), this frequency counter offers flexible gate (display refresh) times of 0.01s/0.1s/1.0s for optimal measurement accuracy. The real-time frequency value is displayed instantly. 3. Versatile Channel Options: The RF Frequency Counter supports three measurement channels: low-pass channel, high-pass channel, and auto channel. It features a single-ended input design, allowing you to select the appropriate channel based on your specific frequency measurement needs. 4. Dual Intermediate Frequency Design: With its dual intermediate frequency design, this frequency counter enables presetting of intermediate frequency values and addition/subtraction modes. It offers enhanced flexibility and customization options for advanced frequency measurements. 5. User-Friendly Interface and Settings: The RF Frequency Counter utilizes an eight-digit 0.56-inch high-brightness LED display with adjustable brightness (eight levels). It automatically hides invalid zeros, and you can choose to enable optional filters for displaying invalid frequency values. The circuit design is concise and well-structured, and the counter is controlled by two easy-to-use buttons. Type: Module Gate time: 0.01sec; 0.10sec; 1.0sec Measurement channels (both high and low channels are high resistance): Low channel: Measurement range: 0.1 MHz-60 MHz Measurement accuracy: 100 Hz (at 0.01 sec gate); 10 Hz ( at 0.1 sec gate); 1 Hz ( at 1.0 sec gate) Low channel sensitivity: 0.1 MHz-10 MHz: 60mVPP 10 MHz-60 MHz: 60mVPP 60 MHz-75 MHz: not tested High Channel (64 divisions): Measurement range: 20 MHz - 2.4 GHz Measurement Accuracy: 6400Hz (at 0.01 sec gate); 640Hz ( at 0.1 sec gate); 64Hz ( at 1.0 sec gate) High channel sensitivity: 20 MHz-30 MHz: 100mVPP 30 MHz-60 MHz: 50mVPP 60 MHz-2.4GHz: not tested Operating voltage: DC input: DC 9V-15V (with power polarity reverse connection protection) Operating current: Maximum 160 mA (test conditions: DC12V power supply; red digital tube; eight levels of brightness) Display digits: eight LED display, the highest display eight digits. Onboard Interface: DC IN (power connector): HX2.54-2P socket RF IN (signal input): HX2.54-2P socket ICSP (programming interface): 2.54-6P socket Colour:As Shown Material:PC Package Contents: 1 x RF Frequency Counter(Due to different product batches, the appearance , which does not affect the use) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.