LBI-39152
ericssonz
ericssonz
MAINTENANCE MANUAL
ROCKWELL MODEM INTERFACE CARD, ROA 117 2247/1
RS-232 INTERFACE CARD, ROA 117 2247/2
TABLE OF CONTENTS
Page
SPECIFICATIONS......................................................................................................................................... 2
INTRODUCTION........................................................................................................................................... 3
DESCRIPTION ............................................................................................................................................... 3
INSTALLATION ............................................................................................................................................ 3
RS-232 INTERFACE CARD ......................................................................................................................... 3
FRONT PANEL INDICATORS................................................................................................................ 3
DESCRIPTION ......................................................................................................................................... 3
ROCKWELL MODEM INTERFACE CARD............................................................................................. 4
FRONT PANEL INDICATORS................................................................................................................ 4
DESCRIPTION ......................................................................................................................................... 5
CIRCUIT ANALYSIS ............................................................................................................................... 5
ROCKWELL MODEM ASSEMBLY RYTUA 92101/1.............................................................................. 6
Data Encoding .................................................................................................................................... 6
Receive Level ..................................................................................................................................... 6
Transmit Level .................................................................................................................................... 6
Receive Line Signal Detector (RLSD)................................................................................................ 6
MODES OF OPERATION........................................................................................................................ 6
HARDWARE CIRCUITS ......................................................................................................................... 8
POWER-ON INITIALIZATION............................................................................................................... 8
Digital Interface Characteristics.......................................................................................................... 9
Analog Interface Characteristics ......................................................................................................... 9
MAINTENANCE ............................................................................................................................................ 10
RM INSTALLATION AND REMOVAL ................................................................................................. 10
RMIC JUMPERS....................................................................................................................................... 10
ALIGNMENT PROCEDURES ................................................................................................................. 10
TROUBLESHOOTING............................................................................................................................. 11
REPAIR ..................................................................................................................................................... 11
MODIFICATIONS ......................................................................................................................................... 12
ROCKWELL MODEM INTERFACE CARD .......................................................................................... 12
Inverting Signals ................................................................................................................................. 12
RMIC Modified for RS-232 Receive.................................................................................................. 12
RS-232 INTERFACE CARD .................................................................................................................... 12
CTS To RTS Connection.................................................................................................................... 12
