User Guide

PAMS
Technical Documentation
RAE-3
3. RF+System Module BL8
Page 3 – 34
issue 1 06/01
Earpiece and HF Speaker lines
Earpiece and speaker lines come from the AUDIO_RFI block.
Battery removal signal
BATT_REM signal comes from the battery removal switch.
SYSCON block
Main components in system connector block include:
– System connector (X450) (pads for system connector’s spring contacts)
– Coaxial connector for antenna cable (X499)
– ESD protection zener array (V451)
For protecting the communicator against ESD spikes and EMI at the system
connector, all lines are equipped with TVS and filtering devices located next to
the system connector.
The system connector includes the following group of contacts:
– DC jack for external plug–in charger and contacts for desktop charger
– Contacts for external audios
– Contacts for serial connections
– External RF connector with switch
Externally, the system connector resembles the system connector in N9110
Communicator. Figure 8 shows the pads on PWB and Figure 9 shows the con-
nector. Serial connection signals are named in RAE-3’s connector according to
DCE type equipment (as in RAE–2). This means that DCE_RX and DCE_DCD
(MBUS line) are outputs and DCE_TX and DCE_DTR are inputs.
Figure 8. Pads for system connector on top side of BL8
123
6745
10 1189
14 13
15 12