Features High-Performance 1.2GHz Frequency Counter: Utilizes Microchip's 8-bit microcontroller PIC16F648A for accurate and reliable frequency measurement up to 1.2GHz. Adjustable Intermediate Frequency: Minimum step of 100Hz and a range of 0~999.9999MHz, with plus or minus intermediate frequency mode for precise measurements. Temperature-Compensated Voltage-Controlled Crystal Oscillator: Built-in frequency reference with ±2.5 ppm VC-TCXO ensures stable and accurate frequency readings. Dual Intermediate Frequency Design: Separate preset settings for intermediate frequency value and plus/minus mode for enhanced customization and flexibility. LCD0802 Display with 7 Digits: Clear LCD screen with automatic blanking of invalid zero frequency values, providing easy and precise frequency readings. Specification: Item Type: Frequency Measurement Module Material: PCB Uses: Mainly used for DIY transceivers for frequency value display, and can also be used for regular frequency measurement Gate Time: 0.64s Measuring Range: 1MHz~1.2GHz Measurement Accuracy: ±100Hz Working Voltage: DC 9V~12V (with power reverse polarity protection) Working Current: Enable Backlight: between55mA Display Digits: The highest 7 digits display Frequency Reference: 13.000MHz temperature compensated voltage controlled crystal oscillator (VC-TCXO) in 5032 package, frequency stability is ±2.5ppm Channel Sensitivity: (HM8134-2 data) Test frequency（MHz） 310 Onboard Interface: RF INPUT (measurement signal input): XH2.54-2P square socket ICSP INPUT (MCU programming interface): XH2.54-6P pin POWER INPUT: XH2.54-2P square socket How to Use: 1. Please check the power supply voltage (DC 9V-12V) and polarity before use, and then turn on the power supply after confirming that it is correct. The machine has a fool-proof design, the power supply polarity is reversed, the machine will not work, but it will not produce destructive consequences. 2. The measurement signal input is connected to the test line (wired method) or antenna (induction method) with the 2P square socket. 3. Turn on the power of the instrument to warm up for a few minutes and wait for the frequency reference to stabilize before performing measurement operations. Package List: 1 x Module 2 x Connection Line Package List 1 x Module 2 x Connection Line