Mini chip's 8-bit microcontroller PIC16F648A as the core of the high-performance 1.2 GHz frequency meter. Built-in frequency reference using temperature-compensated voltage-controlled crystal oscillator (2.5 ppm TCXO). Dual IF design; IF and add/subtract mode can be individually preset. LCD0802 display, up to 7 digits shown; leading zeros automatically blanked. Reverse-polarity protection; low-power battery operation. Two-button control for intuitive user interface. Settings saved automatically and recalled on power-up. Gate time: 0.64 sec Measuring range: 1 MHz to 1.2 GHz Measurement accuracy: ±100 Hz Channel sensitivity (HM8134-2 reference): Test Frequency (MHz): 5, 10, 30, 60, 100, 150, 200, 300, 450 Sensitivity (mV RMS): 35, 20, 10, 3, 3, 4, 8, 15, 12 Test Frequency (MHz): 500, 550, 600, 700, 800, 900, 1000, 1100, 1200 Sensitivity (mV RMS): 14, 30, 65, 80, 80, 35, 175, 270, 310 Operating voltage: DC 9 V – 12 V (reverse polarity protected) Operating current: ≤55 mA (backlight enabled) Display digits: Up to 8 digits IF settings: Adjustable in 100 Hz steps from 0 to 999.9999 MHz; supports IF increase or decrease mode Frequency reference: 13 MHz temperature-compensated voltage-controlled crystal oscillator (TCXO) in 5032 package, stability ±2.5 ppm RF INPUT (measurement signal input): XH2.54-2P socket ICSP INPUT (MCU programming interface): XH2.54-6P header POWER INPUT: XH2.54-2P socket Name: Frequency Meter Color: As shown Material: PCB + Plastic + Metal Package Contents: 1 × PLJ-0802-E frequency counter meter with cable Note: Color appearance may vary slightly due to lighting and screen settings. Measurement tolerance: ±1–3 cm.