Enhance your frequency measurement projects with the PLJ-8LED Frequency Counter, a high-precision 2.4 GHz frequency meter featuring Microchip's PIC16F648A microcontroller. Designed with a temperature-compensated voltage-controlled crystal oscillator (VC-TCXO) offering exceptional frequency stability of ±2.5 ppm, this frequency counter ensures accurate and reliable readings across a broad range of applications. Its compact and durable design includes an eight-digit 0.56-inch high-brightness LED display with adjustable brightness, providing clear and vivid frequency value visualization in real-time. Key Features: · Advanced Microcontroller Integration: Equipped with Microchip's PIC16F648A for stable and efficient frequency measurement. · High Stability VC-TCXO: Utilizes a 13.000 MHz temperature-compensated voltage-controlled crystal oscillator with ±2.5 ppm stability for precise frequency reference. · Multi-Channel Frequency Measurement: Supports three measurement channels—low channel (0.1 MHz to 60 MHz), high channel (20 MHz to 2.4 GHz), and auto channel for automatic frequency range selection. · Versatile Gate Time Settings: Offers selectable gate times of 0.01s, 0.1s, and 1.0s, enabling real-time frequency display with varying levels of accuracy and refresh rates. · Dual Frequency Design with IF Settings: Features independent double-IF design allowing separate presetting of value and IF/down modes, with adjustable frequency steps as fine as 100 Hz over a range of 0 to 99.9999 MHz. · High Sensitivity Input: Single-ended input design with low impedance channels ensuring sensitive and accurate frequency detection across wide frequency bands. · User-Friendly Operation: Simple two-button control interface with automatic setting memory, enabling easy operation and direct boot recall of previous configurations. · Durable and Compact Build: Lightweight (approx. 47g) and compact dimensions (125.5 mm x 25.5 mm x 21.5 mm) make it ideal for portable and embedded applications. · Clear and Adjustable Display: Eight-digit LED display with eight-level adjustable brightness for optimal visibility in various lighting conditions. · Reliable Power Supply: Operates on DC 9V to 15V input with reverse polarity protection and low current consumption (max 160 mA at 12V). Specifications: · Model: PLJ-8LED-H · Frequency Range:  - Low Channel: 0.1 MHz – 60 MHz (Accuracy: ±1 Hz at 1.0s gate)  - High Channel: 20 MHz – 2.4 GHz (Accuracy: ±64 Hz at 1.0s gate)  - Auto Channel: Automatic frequency range selection at 60 MHz threshold · Gate Times: 0.01s / 0.1s / 1.0s · Display: 8-digit, 0.56-inch LED, red or blue backlight options · Operating Voltage: DC 9V – 15V (reverse polarity protected) · Current Consumption: Max 160 mA (12V DC, max brightness) · Dimensions: 125.5 mm x 25.5 mm x 21.5 mm · Weight: Approx. 47 g (1.7 oz) · Interfaces: DC IN (HX2.54-2P), RF IN (HX2.54-2P), ICSP programming (2.54-6P pin) Package Includes: · 1 x PLJ-8LED Frequency Counter · 2 x Connection Cables The PLJ-8LED Frequency Counter is an ideal solution for transceiver frequency display, conventional frequency measurement, and various RF applications. Its precise time algorithm and unique gate control deliver stable and accurate frequency readings, while the compact design and adjustable display brightness provide excellent usability and visibility. Whether for professional or hobbyist use, this frequency counter offers reliable performance and cost-effective functionality.