NUK Eco Control Audio 500, Operating Instructions Manual

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If these hints do not solve the problem you
can try to clear the fault as follows:
1. Take the battery out of the parent unit.
2. Unplug the mains adapters from their
power sockets.
3. Wait a few minutes.
4. Replace the battery and plug the mains
adapters back in.
If this has not resolved your problem, please
contact one of our Service Centres (see
"11.2
Service Centres Babyphone" on
page 33).
9. Technical data
9.1 FHSS Technology
The wireless transmissions of this baby
monitor use modern FHSS technology.
Frequency Hopping Spread Spectrum
(FHSS) is a digital frequency spreading
method for wireless data transmissions.
Unlike earlier methods, the whole of the
transmission power is not concentrated on a
single frequency. Instead, the carrier
frequency is changed at random. The
individual data packets transmitted via the
different carrier frequencies are then
reassembled in the receiver.
This method has several advantages over
conventional radio transmission:
• It is also much more difficult to intercept
the radio signal, because the listener
does not know how the signal is
distributed among the different
frequencies and how to correctly
reassemble it. For this reason the same
method is used by Bluetooth and by the
military.
• Radio transmissions that use this method
are also much less susceptible to
interference. This is because a given
carrier frequency is always used only very
briefly before switching to another. If
there is interference on one frequency it
will affect only small data packets, and
appropriate correction algorithms can
compensate for such errors.
Wireless connection 2.4 GHz FHSS
Transmission frequency 2408 MHz - 2474 MHz, max EIRP 100mW
Number of channels 12 / automatic channel selection
Line of sight range about 250 m
Range within enclosed rooms about 40 m. Successful transmission depends on the environment.
Walls or trees can seriously interfere with reception.
Baby unit
Operating temperature 0 °C to 40 °C ambient temperature
Parent unit
Operating temperature 0 °C to 40 °C ambient temperature
Battery Lithium polymer battery (LiPo), 3.7 V, 1200 mAh
Period of operation in normal transmission mode: at least 15 hours
Period of operation in Eco-Mode: at least 18 hours
Charging time when battery is charged for the first time: at least 10
hours,
on subsequent occasions, charging takes about 5 hours
Mains adapters
Input 100–240 V AC; 50/60 Hz; 0.1 A
Output 5 V ; 2.75 W;