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參數(shù)資料
| 型號： | FX489DW |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | GMSK Modem |
| 中文描述： | GMSK調(diào)制解調(diào)器 |
| 文件頁數(shù)： | 5/12頁 |
| 文件大?。?/td> | 106K |
| 代理商： | FX489DW |
5
Application Information ......
FX489
GMSK MODEM
Rx
CIRCUITS
Tx
CIRCUITS
Rx DATA
Rx CLOCK
Tx DATA
Tx CLOCK
Tx OUT
SIGNAL AND
DC LEVEL
ADJUSTMENT
SIGNAL AND
DC LEVEL
ADJUSTMENT
Rx SIGNAL IN
Rx FEEDBACK
Rx FREQUENCY
DISCRIMINATOR
RxD
RxC
TxD
TxC
MICRO
CONTROLLER
FREQUENCY
MODULATOR
Fig.3 External Signal Paths
MICROCONTROLLER
SERIAL
I/O PORT
RxD
RxC
TxD
TxC
V
DD
SETTINGS:
D/Rate 4800bps - BT 0.5 - Rx & Tx Enabled
4.9152MHz
XTAL/CLOCK
Tx ENABLE
ClkDIVA
ClkDIVB
BT
Tx PS
Rx PS
Rx S/N
FX489
GMSK MODEM
PLLacq
RxDCacq
XTAL
Rx DATA
Rx CLOCK
Tx DATA
Tx CLOCK
RxHOLD
Clock Oscillator and Dividers
The Tx and (nominal) Rx data rates are determined
by division of the frequency present at the Xtal pin,
which may be generated by the on-chip Xtal oscillator
or be derived from an external source.
The division ratio is controlled by the logic level
inputs on the ClkDivA/B pins, and is shown in the table
below - together with an indication of how various
‘standard’ data rates may be derived from common μP
Xtal frequencies.
Xtal/Clock Frequency (MHz)
4.9152
4.096
[12.288/3]
2.048
[6.144/3]
2.4576
[12.288/5]
Division ratio
Xtal Freq/
Data Rate
128
256
512
1024
ClkDiv ClkDiv
A
0
0
1
1
Table 1 Clock/Data Rates
Data Rate (bps)
B
0
1
0
1
16000
8000
4000
19200
9600
4800
16000
8000
4000
19200
9600
4800
Note
guaranteed or specified above 19,200 bits/s
or below 4,000 bits/s.
that device operation is not
Radio Channel Requirements
To achieve legal adjacent channel performance at
high bit-rates, a radio with an accurate carrier
frequency and an accurate modulation index will be
required.
To achieve optimum channel utilization, (eg. low
BER and high data-rates) attention must be paid to the
phase and frequency response of both the IF and
baseband circuitry.
Fig.4 Minimum μController System Connections
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| FX489P | GMSK Modem |
| FX501 | High-Current Switching Applications |
| FX502 | High-Current Switching Applications |
| FX504 | High-Current Switching Applications |
| FX505 | High-Current Switching Applications |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FX489P | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:GMSK Modem |
| FX4A1-20P-1.27SV | 制造商:HRS 制造商全稱:HRS 功能描述:Stacking Height 5 to 11mm Half Pitch Connector |
| FX4A1-20P-1.27SV(71) | 功能描述:板對板與夾層連接器 20P STRT SMT HEADER NO LOC BOSS GLD PLT RoHS:否 制造商:JAE Electronics 系列:WP3 產(chǎn)品類型:Receptacles 節(jié)距:0.4 mm 疊放高度:1 mm 安裝角: 位置/觸點數(shù)量:50 排數(shù):2 外殼材料:Plastic 觸點材料:Copper Alloy 觸點電鍍:Gold 電壓額定值:50 V 電流額定值:0.4 A |
| FX4A1-20P-1.27SV(99) | 功能描述:板對板與夾層連接器 20P STRT SMT HEADER NO LOC BOSS GLD PLT RoHS:否 制造商:JAE Electronics 系列:WP3 產(chǎn)品類型:Receptacles 節(jié)距:0.4 mm 疊放高度:1 mm 安裝角: 位置/觸點數(shù)量:50 排數(shù):2 外殼材料:Plastic 觸點材料:Copper Alloy 觸點電鍍:Gold 電壓額定值:50 V 電流額定值:0.4 A |
| FX4A1-20S-1.27SV | 制造商:HRS 制造商全稱:HRS 功能描述:Stacking Height 5 to 11mm Half Pitch Connector |
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