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
©
2002 CML Microsystems Plc
2
D/589A/4
CMLMICRO [ CML MICROCIRCUITS ]
