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參數(shù)資料
| 型號： | FX489 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | GMSK Modem |
| 中文描述： | GMSK調制解調器 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 106K |
| 代理商： | FX489 |
1
PRODUCT INFORMATION
FX489
GMSK Modem
Obsolete Product - For Information Only
CML Semiconductor Products
Features
Full-Duplex Gaussian Minimum
Shift Keying
Selectable BT (0.3 or 0.5)
Meets RAM - MOBITEX Specification
Data Rates From 4000bits/s to
19200bits/s
Serial Rx and Tx Data Interfaces
Rx and Tx Data Clock Generation
Rx Signal Tracking Controls
Rx S/N Indication
Separate Rx and Tx Powersave
Inputs
Wireless Modem, Radio Telemetry
and Data Terminal Applications
The FX489 is a single-chip modem employing
Gaussian Minimum Shift Keying (GMSK) modulation.
Having a pin selectable BT of 0.3 or 0.5, the FX489
may be employed at data rates of between 4,000bits/s
and 19,200bits/s; for use in FM radio-data links and
data communication systems conforming to DOC and
FCC spectrum limitations for 12.5kHz and 8,000 baud
at a BT of 0.3, and 12.5, 25.0, and 50.kHz channel
spacing and data rates of 4800, 9600 and 19,200
baud respectively at a BT of 0.5.
The Rx and Tx digital data interfaces are bit-serial
and synchronised to Rx and Tx data clocks generated
by the modem. Separate Rx and Tx Powersave/
Enable inputs allow for full- or half-duplex operation.
Rx input levels can be set by a suitable a.c. and
d.c. level adjusting circuit built, with external
components, around an on-chip Rx input amplifier.
Acquisition, lock and hold of Rx data signals is
made easier and faster by the use of Rx Control
Inputs to clamp, detect and/or hold input data levels
and can be set by the μProcessor as required.
Indication is available, from the Rx S/N output, as
to the quality of the received signal.
The FX489, a low-power CMOS microcircuit, is
available in both 24-pin plastic Small Outline (S.O.I.C)
and DIL packages.
Brief Description
Fig.1 Functional Block Diagram
FX489
Tx PS
Rx PS
BT
Tx DATA
ClkDIVA
PLLacq
RxDCacq
Rx SIGNAL IN
Rx FEEDBACK
ClkDIVB
XTAL/CLOCK
Tx ENABLE
XTAL
V
DD
V
BIAS
V
BIAS
V
BIAS
V
BIAS
V
SS
RxHold
+
-
DOC1
Rx CLOCK
Tx CLOCK
Tx OUT
Rx DATA
Rx S/N
DOC2
DATA RETIME
&
LEVEL SHIFT
Tx
FILTER
CLOCK
DIVIDER
Rx CIRCUIT
CONTROL
Rx
FILTER
Rx LEVEL
MEASURE
Rx CLOCK
EXTRACT
Rx S/N
DETECTION
Rx DATA
EXTRACT
NEW
40kbps
Modem
FX589
Pin/Function
Compatible
相關PDF資料 |
PDF描述 |
|---|---|
| FX489DW | GMSK Modem |
| FX489P | GMSK Modem |
| FX501 | High-Current Switching Applications |
| FX502 | High-Current Switching Applications |
| FX504 | High-Current Switching Applications |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| FX489DW | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:GMSK Modem |
| 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 |
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