6
Modem Configuration Page
Transmit Configuration
CHIPS PER SYMBOL CR3<6:5>
These control bits are used to select the number of chips per
symbol used in the I and Q transmit paths.
CR3<6:5>00011011
Chips/Symbol11131516
RATE DIVISOR CR3<4:3>
These control bits are used to select the divide ratio required
to achieve the required data rate.
CR3<4:3>00011011
Divisor24816
ANTENNA SELECT CR0<7:7>
This control bit is used to select the transmit antenna (half-
duplex mode only).
MODULATION CR3<1:1>
This control bit is used to select the signal modulation type
for the transmit packet.
SYMBOL RATE
This indication-only field calculates the current transmit
symbol rate. It is a function of the Master Clock, Modulation
Type, Chips per Symbol and Rate Divisor.
SPREAD SEQUENCE CR13<7:0> CR14<7:0>
These control registers contain the spreading code for the I
and Q transmit paths.
Receive Configuration
CHIPS PER SYMBOL CR2<7:6>
These control bits are used to select the number of chips per
symbol used in the I and Q receive paths.
CR2<7:6>00011011
Chips/Symbol11131516
RATE DIVISOR CR2<4:3>
These control bits are used to select the divide ratio required
for the desired receive data rate.
CR2<4:3>00011011
Divisor24816
ANTENNA SELECT CR0<6:6>
This control bit is used to select the receive antenna (single
antenna mode only).
MODULATION CR3<0:0>
This control bit is used to select the signal modulation type
for the receive packet.
11
15
16
13
THRESHOLD SETTINGS
A/D CALIBRATION
MODEM STATUS
SIGNAL STATUS
MODEM CONFIGURATION
PREAMBLE/HEADER
I/O CONFIGURATION
TEST PORT CONFIGURATION
CHIPS PER SYMBOL
2
8
16
4
RATE DIVISION
A
B
ANTENNA
11
15
16
13
CHIPS PER SYMBOL
2
8
16
4
RATE DIVISION
A
B
ANTENNA
SYMBOL RATE
1000MHz
BPSK
QPSK
MODULATION
SYMBOL RATE
1000MHz
BPSK
QPSK
MODULATION
SPREAD SEQUENCE
05B8
0000 0101 1011 1000
SPREAD SEQUENCE
05B8
0000 0101 1011 1000
MHz
MASTER CLOCK
22.000
0100 1000
SCRAMBLER
48
TAPS
0111 1111
7F
SEED
HALF DUPLEX
FULL DUPLEX
ANTENNA OPERATION
DUAL
SINGLE
ANTENNA MODE
EXIT
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Application Note 9615