GMSK Modem
CMX589A
Contents
Section
Page
Features and Applications .................................................................................................1
Brief Description .................................................................................................................1
Block Diagram.....................................................................................................................3
2 Signal List.........................................................................................................................4
3 External Components ......................................................................................................6
4 General Description.........................................................................................................8
4.1 Clock Oscillator Divider.........................................................................................................8
4.2 Receive.................................................................................................................................8
4.2.1 Rx Signal Path Description.....................................................................................................8
4.2.2 Rx Circuit Control Modes .......................................................................................................9
4.2.3 Rx Clock Extraction..............................................................................................................10
4.2.4 Rx Data Extraction...............................................................................................................10
4.2.6 Rx Signal Quality .................................................................................................................12
4.3 Transmit..............................................................................................................................12
4.3.1 Tx Signal Path Description...................................................................................................12
4.4 Data Formats......................................................................................................................14
4.5 Acquisition and Hold Modes ...............................................................................................14
5 Application......................................................................................................................15
5.1 Radio Channel Requirements.............................................................................................15
5.1.1 Bit Rate, BT, and Bandwidth ................................................................................................15
5.1.2 FM Modulator, Demodulator and IF......................................................................................15
5.1.3 Two-Point Modulation...........................................................................................................16
5.2 AC Coupling of Tx and Rx Signals .....................................................................................17
6 Performance Specifications..........................................................................................18
6.1 Electrical Specifications......................................................................................................18
6.1.1 Absolute Maximum Limits....................................................................................................18
6.1.2 Operating Limits...................................................................................................................19
6.1.3 Operating Characteristics.....................................................................................................20
6.2 Packages............................................................................................................................22
ã 2002 CML Microsystems Plc
2
D/589A/4
CMLMICRO [ CML MICROCIRCUITS ]
