Features 1、With Microchip's PIC16F648A, 2.4 GHz frequency meter. 2、Using temperature-compensated voltage controlled crystal oscillator (2.5 ppm VC-TCXO). 3、Unique gate control and precise time algorithm (non-timed interrupt). 4、Gate (display refresh) time 0.01 seconds / 0.1 seconds / 1.0 seconds, real-time display frequency value. 5、Single-ended input design, three-channel frequency measurement (low channel / high channel / Auto Channel). Specification PLJ-8LED is a cost-effective frequency display component of 8-bit digital tube display. It is mainly used for the display of frequency values of transceiver and other equipment, and can also be used for conventional frequency measurement. This component has the characteristics of compact and delicate, reliable performance, good visual effect and low cost. Features: With Microchip's PIC16F648A, 2.4 GHz frequency meter. Using temperature-compensated voltage controlled crystal oscillator (2.5 ppm VC-TCXO). Unique gate control and precise time algorithm (non-timed interrupt). Gate (display refresh) time 0.01 seconds / 0.1 seconds / 1.0 seconds, real-time display frequency value. Single-ended input design, three-channel frequency measurement (low channel / high channel / Auto Channel). Dual frequency design, value and IF / down mode can be preset separately. Using eight 0.56 inches high brightness digital display, eight adjustable brightness. Circuit is simple and reasonable structure, two-button control, simple operation. The settings are automatically saved, boot directly call. Specification: Model:PLJ-8LED-H Type: Backlight font red, Backlight font blue(Optional) 1. Gate time: 0.01 S 0.10 S 1.0 S 2. Measurement channels (channels are low impedance): low channel Measuring range: 0.1 MHz ~ 60 MHz Accuracy: ± 100Hz (0.01 1s gate time) ± 10Hz (0.1 seconds gate) ± 1Hz (1.0 seconds when the gate) Low channel sensitivity: 0.1 MHz ~ 10 MHz: better than 60mVPP 10 MHz ~ 60 MHz: better than 60mVPP 60 MHz ~ 75 MHz: Not tested high channel (divided by 64) Measuring range: 20 MHz ~ 2.4 GHz Accuracy: ± 6400Hz (0.01 seconds gate) ± 640Hz (0.1 1s gate time) ± 64Hz (1.0 1s gate time) High channel sensitivity: 20 MHz ~ 30 MHz: better than 100mVPP 30 MHz ~ 60 MHz: better than 50mVPP 60 MHz ~ 2.4GHz: not tested Auto Channel Automatically selected according to the input signal frequency high or low channel channel, identifying the frequency of 60 MHz. Such as when the input signal amplitude is greater than 60 MHz shortage can not automatically select high channel, the channel should manually select high frequency measurement. 3,IF settings Independent double-IF design, adjust the minimum frequency step of 100 Hz,frequency range 0 ~ 99.9999 MHz, can be set to increase or decrease the IF frequency mode. 4. Frequency reference Using 5032 package 13.000MHz Warming voltage controlled crystal oscillator (VC-TCXO), frequency stability of ± 2.5 ppm. 5. Operating voltage DC Input: DC 9V ~ 15V (with reverse polarity protection) 6. Current Maximum 160 mA (test conditions: 1) DC12V power supply; 2) red LED; 3) eight brightness) 7. Eight LED display, the highest display eight digits. 8. Eight LED brightness is adjustable, factory set to maximum brightness. 9. Physical Dimensions,Length x width x height: 125.5 mm x 25.5 mm x 21.5 mm 10. Component quality 46 g (NW) 11. Onboard Interface 12.DC IN (Power Interface): HX2.54-2P socket 13.RF IN (signal input): HX2.54-2P socket 14.ICSP (programming interface): 2.54-6P Pin 15.Weight: Approx.47g/1.7oz Package list: 1 x Frequency Counter 2 x cable Package List