CML Microcircuits FX929B
The FX929B is a CMOS integrated circuit that contains all of the baseband signal processing and Medium Access Control (MAC) protocol functions required for a high performance 4-level FSK Wireless Packet Data Modem. It interfaces with the modem host processor and the radio modulation/demodulation circuits to deliver reliable two-way transfer of the application data over the wireless link. The FX929B is backwards compatible with the FX929A but offers better performance during radio link fading and selectable Tx symbol shapes.| Part No. | FX929B |
|---|---|
| Datasheet | FX929B Download |
| Manufacturer |  CML Microcircuits |
| Description | 4-Level FSK Modem Data Pump |
| Buy | Stock & Price |
FEATURES
● 4800 to 19200 b/s Operation● Full Packet Data Framing
● 4-Level FSK Data Modulation
● Low Power, 2.5mA at 3.3V
● Flexible Operating Modes
● Powersave Option
APPLICATIONS
D/929B/1 May 1997● RCR STD-47 and RD-LAP* Systems
● Two-Way Paging Equipment
● Mobile Data Systems
● Wireless Telemetry
● DataTAC® Terminals
● Portable Wireless Data Equipment *Radio Data-Link Access Procedure (RD-LAP) is a data communications air interface protocol developed by Motorola Inc. 1.1 Brief
DESCRIPTION
The FX929B assembles application data received from the processor, adds forward error correction (FEC) and error detection (CRC) information and interleaves the result for burst-error protection. After adding symbol and frame synchronisation codewords, it converts the packet into a filtered 4-level analogue baseband signal for modulating the radio transmitter. In receive mode, the FX929B performs the reverse function using the analogue baseband signals from the receiver discriminator. After error correction and removal of the packet overhead, the recovered application data is supplied to the processor.
