72
Glossary
WAGO-I/O-SYSTEM 758
758-915
Bluetooth
®
ETHERNET Gateway
Manual
Version 1.1.0, applicable from FW/HW Version 01/01
Glossary
A
Adaptive Frequency Hopping (AFH)
The adaptive frequency process “Adaptive Frequency Hopping” (AFH) is a
refinement of the FHSS and is used to temporarily “jump over” defective or busy
portions of the entire available frequency band and switch to other channels.
See also “FHSS”
Authentication
Authentication is a process for testing the identity transmitted by a
communication partner.
B
Bit error rate (BER)
Generally: Frequency of bit errors in the data transmission.
Bluetooth
®
context: Information in percentage on recognized bit errors during
baseband transmissions. As a rule, packets recognized as defective can be
automatically repaired. If this is not possible, the defective data is automatically
discarded.
C
Channel
See Transmission Channel
CoD (Class of Device)
The
Bluetooth
®
Class-of-Device (CoD) is a 24-bit field indicating to which
standard type of device (for example, mobile telephone or handsfree set)
Bluetooth
®
devices belong. In addition to standard types, manufacturer specific
types can also be used.
Cycle time
The cycle time is the rate at which a cyclic process is repeated or the time between
two sequential starting points of a cyclic process, e.g. during the updating of
cyclic process data between
Bluetooth
®
devices connected wirelessly.