High Speed GMSK Modem 4k to 64kbps
Page 2 of 20
MX589
Contents
Section
Page
1 Block Diagram................................................................................................................3
2 Signal List.......................................................................................................................4
3 External Components....................................................................................................5
4 General Description.......................................................................................................7
4.1
4.2
Clock Oscillator Divider ........................................................................................................7
Receive ................................................................................................................................7
4.2.1
4.2.2
4.2.3
4.2.4
4.2.5
4.2.6
Rx Signal Path Description......................................................................................................7
Rx Circuit Control Modes ........................................................................................................8
Rx Clock Extraction .................................................................................................................9
Rx Data Extraction...................................................................................................................9
Rx S/N Detection ...................................................................................................................10
Rx Signal Quality ...................................................................................................................10
TX Signal Path Description ...................................................................................................11
4.3
4.4
4.5
5.1
Transmit .............................................................................................................................11
4.3.1
Data Formats .....................................................................................................................13
Acquisition and Hold Modes...............................................................................................13
Radio Channel Requirements ............................................................................................14
5.1.1
5.1.2
5.1.3
Bit Rate, BT, and Bandwidth .................................................................................................14
FM Modulator, Demodulator and IF ......................................................................................14
Two-Point Modulation............................................................................................................15
5 Application ...................................................................................................................14
5.2
6.1
AC Coupling of Tx and Rx Signals .....................................................................................16
Electrical Specifications......................................................................................................17
6.1.1
6.1.2
6.1.3
6.1.4
Absolute Maximum Limits .....................................................................................................17
Operating Limits ....................................................................................................................17
Operating Characteristics......................................................................................................18
Packages...............................................................................................................................19
6 Performance Specifications........................................................................................17
MXCOM, Inc. reserves the right to change specifications at any time without notice.
2001
MX-COM, Inc.
www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054
Doc. # 204800103.011
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
All trademarks and service marks are held by their respective companies.
CMLMICRO [ CML MICROCIRCUITS ]
