DESCRIPTION
The Cellular Baseband evaluation board includes MAS9191A (Audio/Data Processor), MAS9129 (Battery Management) and MS8323 (VCTCXO) ICs with all needed external components and software. The two regulators of MAS9129 provide all the power for the board. The board has BNC connectors for typical MAS9191A interfaces. By using customised software and external RF parts the complete evaluation of an AMPS/ ETACS/ NAMPS phone can be performed. A general purpose micro controller is used to control the MAS9191A internal registers through a serial bus interface. For the micro controller there is 32kB SRAM, 64kB FLASH, an LCD, a keypad and an RS-232-C interface for software downloading to SRAM or FLASH. There is also a direct interface to the MAS9191A serial bus allowing an external controller to be used.

FEATURES
• Fully operational system (only NiCd/NiMH battery or power supply needed)
• Connectors to Rx,Tx,microphone, ear piece, etc.
• Several test points for audio block
• Battery charger input (9.0VDC/265mA)
• Micro controller with 32kB SRAM, 64kB FLASH
• Keyboard and 2-line/16-character LCD
• RS-232-C interface for software downloading
• External micro controller connector
• 3.4 - 9.0 NiCd/NiMH battery input or power supply

MEASUREMENTS
• Regulator voltage and current
• Receive and transmit frequency responses
• Send and receive messages
• Microphone and Rx audio levels
• SAT detection and generation
• Signalling Tone level
• DTMF detection and generation
• Gain control levels
• Expander and compressor functionality
• VCTCXO output signal