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2.5
2.6
Siemens AG
ICM CP
Audio, microphone, loudspeaker
The function of the audio codec (coder/decoder) is carried out by the A/D converter.
This codec supports duplex speech quality. The mono digital audio signal has a
resolution of 12 bits (linear) or 8 bits (non-linear), corresponding to telephone quality.
The music quality is limited by the size of the loudspeaker, but the effect is better via a
headset (see 4.1).
The microphone is tested with regard to the hardware functionality. For any application
using the microphone, a corresponding driver will have to be installed.
Loudspeaker
Frequency range
Sound pressure
Diameter
Power supply
The permanently fitted battery can be charged by being connected directly to a power
supply unit, or in the charging shell, which is itself connected to the power supply unit.
The maximum operating time depends on the operating state (see 1.3).
Power consumption in the
various operating states
Running
Idle
Sleep
Charging current
Battery cells
Number and type
Nominal voltage
Capacity
Overcharge and exhaustive
discharge protection
Temperature sensor
Power supply unit
Plug type
Input voltage
Charging shell
FO-4.5kHz
86dB
20mm
500 – 600mA; frequent transmission and high
screen brightness increase power consumption;
up to about 4 hours with fully charged battery,
depending on how often transmission takes place
Reduced operation, reduced power consumption
(no data)
device off, memory is supported, low power
consumption approx. 5mA, at least 20 days with
fully charged battery
Charging time to 90% capacity: approx. 2 hours
4 lithium ion cells
7.2V
2800mAh
Integrated in battery pack
Integrated in battery pack
Hollow, cylindrical plug, polarity: + inner
inner diameter: 2.1mm
outer diameter: 5.5mm
length: 9.5mm
12VDC
Contacts for charging shell on underside of
housing (Fig. 2 )
Technical Description
SIMpad SL4
Version V2.0
14/74
20.08.01, David Brunner
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