Start/Stop: Starts and stops the time signal according to the DCF77 protocol and the set time.
Transmit: Switches the transmitter on/off. Can only be activated when signal generation is in progress.
View: Switches between 4 different viewing modes:
a) Shows the set time and transmitted bit value, without LCD background light
Shows the set time and transmitted bit value, with LCD background light
c) Shows an overview of all 60 bit values for a complete minute interval, where the current bit is underlined
d) Shows a dynamic explanation of the bit information currently sent.
Set time and -/+ dial: Activates setting mode where the time can be set using the -/+ dial. The time parameters are sequentially stepped through: Hour, Minute, Second, DST, Year, Month, Day, Weekday. The set time is finally stored in EEPROM.
Sound: Activates a audio indication to complement the text display. The dial is a normal volume control. In addition, it controls the sound types. By quickly turning the knob up+down, 5 different sound types are stepped through:
a) No sound, amplifier off.
b) Click sound. c) Tone sound. d) Tone sound inverted, high frequency. e) Tone sound inverted, low frequency.