參數(shù)資料
型號(hào): NRF902
廠商: Electronic Theatre Controls, Inc.
英文描述: Single chip 868 MHz Transmitter
中文描述: 單芯片868兆赫發(fā)射機(jī)
文件頁(yè)數(shù): 6/13頁(yè)
文件大小: 160K
代理商: NRF902
PRELIMINARY PRODUCT SPECIFICATION
nRF902 Single chip 868 MHz Transmitter
Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway - Phone +4772898900 - Fax +4772898989
Revision: 1.0
Page 6 of 13
April 2000
APPLICATION INFORMATION
FSK Transmit mode
FSK modulation is realised by feeding the modulating data to the digital FSK input
pin (see Figure 6).
Matching Network/
Antenna
X1 13.567MHz
REXT
xtal
XO8
VDD
1
2
3
4
VDD
C
1
C
2
VDD
Clock
Output
R2
R1
FSK
VSS
8
ant1
Data
Input
ant2
VDD
nRF902
5
7
6
Figure 6. FSK transmitter in FSK Transmit mode
In applications where high data rate and low spectrum bandwidth is required an
external varactor may be used to modulate the crystal. For optimum bandwidth usage
a low pass filter should be used to shape the input bit stream, (see Figure 7).
X1 13.567MHz
REXT
xtal
XO8
VDD
1
2
3
4
VDD
C1
C2
VDD
Clock
Output
R2
R1
VDD
Matching Network/
Antenna
ant1
ant2
VSS
FSK
Data
Input
nRF902
8
7
6
5
Figure 7. FSK transmitter in FSK Transmit mode for low spectral bandwidth
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