Siemens SVI-HMFNA04 Functional Description/User Manual page 6

2 Smart Key Fob for homologation
2.1 Button operation for homologation
st
1 time button pressing : Low side Frequency (Carrier wave continueous mode)
nd
2 time button pressing : High side Frequency (Carrier wave continueous mode)
rd
3 time button pressing : FSK Modulation (Modulated wave continueous mode)
th
4 time button pressing : Stop operation.