describe: DCF receiver module with DCF antenna tuned to time signal transmitter DCF77 (Frankfurt 77.5 kHz). The antenna induction signal is sent to the IC for amplification, demodulation, and then identified by the MCU, so that the date and time of the timing center can be completely consistent. Below you will find important setup and circuit diagrams. Technical Specifications DCF---77.5KHZ single frequency specification: Product number: DCF-1060N-03A RCCM category: DCF/77.5KHz single frequency module PCB size: 25.0x11.5x1.0mm/FR4 Antenna size: AR10x60mm/High Q Nominal frequency: 77.5KHz300Hz Sensitivity: 272dB Receiving IC: CME6005 JJY-40/60KHZ dual frequency specification Product number: JJY-1060N-MAS RCCM category: JJY/40+60KHz dual frequency module PCB size: 22.0x13.5x1.0mm/FR4 Antenna size: AR10x60mm/High Q Nominal frequency: 40/60KHz300Hz Sensitivity: 40/60K:30/282dB Receiving IC: MAS6181B Operating voltage: 1.1...3.3 V Current consumption: 85 A max Receiving frequency: 77.5 KHz Board size (without antenna) LxWxH: 22x13.5x1 mm Antenna quality: Lx: 60x10mm Scope of delivery: 1 piece DCF receiver module with antenna connect: Ground = Pin G Operating Voltage = Pin V data = pin T Power On/Off = Pin P1 40/60K frequency selection = SEL AGC(Note 4: Optional Control for AGC On/Hold AON control pin has internal pull up which turns AGC circuit on all the time if AON pin is left unconnected. Optionally AON control can be used to hold and release AGC circuit. Stepper motor drive of analog clock or watch can produce disturbing amount of noise which can shift the input amplifier gain to non optimal level. This can be avoided by controlling AGC hold (AON=VSS) during stepper motor drive periods and releasing AGC (AON=VDD) when motors are not driven. The AGC should be in hold only during disturbances and kept on other time released since due to leakage the AGC can still change slowly when in hold.) Important note: PIN P1 is an on/off switch and must be set to logic low. Note: Single-frequency modules cannot be switched between different frequencies of DCF/WVB/HBG/BPC, JJY dual-frequency modules can be switched between 40K/60K two frequencies, to make a certain single-frequency module, only can receive signals in this frequency band. Package Included: 1*Receiver module