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A008 / A6188+ – Circuit Description
Different Earthing Points
10) The signal is then passed to the
11) The signal is demodulated internally using an external Varactor diode RX Local
Oscillator set up CR259, which is driven by
12) Where in earlier products, we used to have
only used in digital form within the MAGIC and cannot be measured without
technical set up. The demodulated signal is now converted internally to digital form
to be passed along an RX SPI bus to the Whitecap.
13) The
RX SPI
signal is made up of
Frame Synch Receive) and
Pins G8, G9 and F7 respectively.
14) The
Whitecap U800
Whitecap the signal is digitally processed. Baud rate reduced, Error correction bits
removed, etc...
15) The digital signal is now being fed down the
U900, internally to the GCAP, the digital signal is converted to analogue and
distributed to the correct outputs
16) For Earpiece, from GCAP II Pins H6 and H7 to
17) The Alert is generated within the
appropriate data from the incoming signal, SMS, call etc... an interrupt from the alert
is fed back to the GCAP, via the signal SPEAK_TP915. This signal is supported by
the signal
PDA_VCC (ALRT_VCC
then to
PDA_VCC
18) For the headset only the
Headset Connector
RF:
Transmit
1) There are 2 Mic inputs, firstly from the
input is fed to the
2) Secondly the analogue voice can be fed from the Aux Mic attached to the headset and
will be routed from connection 1 of the
H3. The Aux mic input is amplified through
BOOM_PWR
(BOOM_EN-Whitecap
3) Within the GCAP II the analogue audio will be converted to digital and clocked out
onto the
DIG_AUD
4) It is within the Whitecap that all information about the transmission burst is
formulated i.e. The timing of the burst / The channel to transmit on / The error
correction protocol / In which frame the information will be carried to the base
station, etc, etc...
5) All this information is then added to the digitised audio and is transferred to the
MAGIC U200
along the TX SPI bus. The bus is made up of
Clock Transmit) Pin B3 and
Motorola Internal Use
MAGIC IC U200
BDR
BCLKR
(Base band Clock Receive, fed from MAGIC
receives these signals on Pins A3, D4 and B4, within the
Dragon ball IC
(Q938
through Q9800.
SPKR-
signal is used
J650, Pin 3.
Xcvr mic J910
GCAP II U900
Pin J2
SPI bus to the
Whitecap
BDX
(Base band Data Transmit) Pin B6. The timing for
PRE IN
Pin A7
LO2 CP
Pin A9 of
RX RXQ, and I
these signals are now
(Base band Data Receive),
DIG_AUD
SPI bus to the
Speaker Pads J9833
U2000, and not
on AL) to
SECOND_VCC
GCAP II
Pin H6 and feeds the
Pin 2, where the analogue
Headset Jack
J504, through to
U980
which is supported by
+V2)
U800.
BCLKX
4
MAGIC
U200.
BFSR
(Base band
GCAP II
Pins 1 and 2
GCAP II
given the
(PDA) and
GCAP
II, Pin
(Base band
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