Frequency Measurement Module Display RF Signal Counter Cymometer 1MHz~1.2GHz PLJ‑0802‑E 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: <55mA 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）  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 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 e: 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.