PLJ-0802 Embedded intelligent frequency meter designed specifically for the HAM frequency measurement instruments. Its small and exquisite, simple, reliable, mainly for DIY transceiver for frequency value display can also be used for conventional frequency measurement. Mini chip's 8-bit microcontroller PIC16F648A as the core of the high-performance 1.2GHz frequency meter. Built-in frequency reference using temperature compensated voltage-controlled crystal oscillator (± 2.5 ppm VC-TCXO). Dual IF design, IF and add / subtract mode can be individually preset. LCD0802 LCD screen display, up to 7 digits can be displayed, the frequency value is invalid zero automatic blanking. Anti-power reverse design, low-power battery-powered programs. Double-button control, good man-machine interface. The settings are automatically saved, the next boot directly call. Technical Parameters: Gate time:0.64 sec Measuring range: 1 MHz to 1.2 GHz Measurement accuracy: ± 100Hz Channel Sensitivity: (HM8134-2 data) 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 input: DC 9V ~ 12V (reverse polarity protection with power supply) Operating current:Enable backlight: less than equal 55 mA Display digits:The highest 8 digits are displayed Physical dimensions:Length x width x height: 58mm x 32mm x 27mm IF settings:IF adjustable minimum step of 100 Hz, the range of 0 to 999.9999 MHz, can be set to increase the IF or reduced IF mode. Frequency reference:The 13000-MHz temperature-compensated voltage-controlled crystal oscillator (VC-TCXO) in a 5032 package has a frequency stability of ± 2.5 ppm. Onboard interface: RF INPUT (measurement signal input): XH2.54-2P square mouth socket ICSP INPUT (