HomeMatic HM-RC-4-2, Руководство по эксплуатации

Страница: 63 / 68

63
9.3 Duty cycle exceeded
The duty cycle is a legally regulated limit of the trans-
mission time of devices in the 868 MHz range. The
aim of this regulation is to safeguard the operation of
all devices working in the 868 MHz range.
In the 868 MHz frequency range we use, the maximum
transmission time of any device is 1% of an hour (i.e.
36 seconds in an hour). Devices must cease trans-
mission when they reach the 1% limit until this time
restriction comes to an end. HomeMatic devices are
designed and produced with 100% conformity to this
regulation.
During normal operation, the duty cycle is not usually
reached. However, repeated and wireless-intensive
teach-in processes mean that it may be reached in iso-
lated instances during start-up or initial installation of a
system. If the duty cycle is exceeded, this is indicated
by one long and one short red flash of the device LED,
and may manifest itself in the device temporarily wor-
king incorrectly. The device will start working correctly
again after a short period (max. 1 hour).