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ROCKWELL MODEM INTERFACE CARD, ROA 117 2247/1
RS-232 INTERFACE CARD, ROA 117 2247/2
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
MAINTENANCE MANUAL
TABLE OF CONTENTS
LBI-39152
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Summary of Contents for Rockwell ROA 117 2247*1
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Page 1: Table Of Contents
LBI-39152 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..................... -
Page 2: Specifications
SCHEMATIC DIAGRAMS ...........................21 FIGURES AND TABLES Figure 1 - RS-232 Interface Front Panel ....................3 Figure 2 - Rockwell Modem Interface Card Front Panel ................4 Figure 3 - Rockwell Modem Interface Card Block Diagram..............7 Figure 4 - RMIC Jumper Locations......................10 Figure 5 - RMIC DIP Switch S1 ........................11 Figure 6 - RMIC RS-232 Receive Mod (PWB top) ...................12... -
Page 3: Introduction
Interface Cards are available as an RS-232 should be on. This will indicate that all voltages are applied Interface Card (ROA 117 2247/2) or as a Rockwell Modem to the module. If any of the Front Panel voltage indicators Interface Card (RMIC) (ROA 117 2247/1). -
Page 4: Rockwell Modem Interface Card
Digital Receiver's GPTC. The RMIC contains RS-232 to TTL converters, phone line interface, Rockwell Modem interface circuits, and the Rockwell Modem (RM), all mounted on a VME size card. NOTE NOTE When installed in Simulcast system using Intraplex... -
Page 5: Description
The Clear To Send indicator, CTS (V11), is turned ON Register addressed by RS0 thru RS3. This assures that the by the Rockwell Modem after it receives an RTS, telling the RM is always initialized and runs in the desired mode. -
Page 6: Rockwell Modem Assembly Rytua 92101/1
232 to TTL by U5 and passes unchanged through XOR gate For Fast Train configurations, the receiver enters the U2 section 3 and is sent to the Rockwell Modem (TXD). training state upon detecting a significant increase in the received signal power. If the received line signal power is... -
Page 7: Figure 3 - Rockwell Modem Interface Card Block Diagram
RS-232 To TTL Converter X2-49 RS-232 RTS MRTS XTCLK From GPTC X2-51 X1-12 RS-232 CTS MCTS To GPTC U2-2 RS-232 TXCLK MTXCLK From GPTC WRITE Write Pulse Generator U3 and U1 Figure 3 - Rockwell Modem Interface Card Block Diagram... -
Page 8: Hardware Circuits
LBI-39152 ROCKWELL MODEM ASSEMBLY RYTUA 92101/1 Table 1 - R96FT Hardware Circuits HARDWARE CIRCUITS Hardware circuits are assigned to specific pins in a Name Type DIP Pin Description 61-pin DlP connector. Signal names and descriptions of the hardware circuits, including the microprocessor interface, A. -
Page 9: Digital Interface Characteristics
ROCKWELL MODEM ASSEMBLY RYTUA 92101/1 LBI-39152 Digital Interface Characteristics Table 2 - Digital Interface Characteristics Input/Output Type Symbol Parameter Units I/O A I/O B Input Voltage, High 2.0 Min. 2.0 Min. 2.0 Min. 2.0 Min. 5.25 Max. 2.0 Min. Input Voltage, Low 0.8 Max. -
Page 10: Maintenance
LBI-39152 MAINTENANCE RMIC JUMPERS MAINTENANCE The RMIC has two jumpers which must be installed prior to use. CAUTION OBSERVE PRECAUTIONS Receive Telephone Line Termination FOR HANDLING The jumper, X6, when installed on X4 inserts or ELECTROSTATIC removes R1 from the receive telephone line circuit. R1 is SENSITIVE used to balance the line on T1. -
Page 11: Troubleshooting
+12 volt power. Check +12 volt fuse F3. -12V LED off. -12 volt power. Check -12 volt fuse F2. RMIC fails to receive or Rockwell Modem a. Replace RM with a known good unit. transmit data Jumpers b. Verify proper jumper settings. -
Page 12: Modifications
Cut here match the unit removed. Figure 6 - RMIC RS-232 Receive Mod (PWB top) ROCKWELL MODEM INTERFACE CARD Inverting Signals In some applications it may be necessary to invert some or all input or output signals. The following is a list of signals and steps necessary for inverting the signal: •... -
Page 13: Assembly Diagrams
ASSEMBLY DIAGRAM LBI-39152 ROCKWELL MODEM INTERFACE CARD ROA 117 2247/1 (1/1078 ROA 117 2247/1, Sh. 1, Rev. A) - Page 14 LBI-39152 ASSEMBLY DIAGRAM RS-232 INTERFACE CARD ROA 117 2247/2 (1/1078 ROA 117 2247/2, Sh. 1, Rev. A)
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Page 15: Parts List
PARTS LIST LBI-39152 SYMBOL PART DESCRIPTION ROCKWELL MODEM INTERFACE CARD NUMBER 131 32-ROA 117 2247/1 Revision: C REP 645 623/12 Ceramic chip: 120 Ohm, 1%, 1/4w. REP 645 623/12 Ceramic chip: 120 Ohm, 1%, 1/4w. SYMBOL PART DESCRIPTION NUMBER REP 645 62 Zero-ohm jumper. - Page 16 RNY 101 01/4 Keying Plug. TVA 117 2225 R2 Printed wiring board. MODEM RYTUA 921 01/1 Modem, 9600 baud; sim to Rockwell Modem R96FT with DIP connector. SXA 120 4174/4 RS-232 Interface Front Panel. NTM 201 1079 Hardware Kit. PRODUCTION CHANGES...
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Page 17: Ic Data
IC DATA LBI-39152 U1 - CMOS 2 X MONOSTABLE MULTIVIBRATOR RYT 306 2024/C (74HC4538) FUNCTION TABLE INPUTS OUTPUTS Reset +Triggr - Trigg RESET A Tr A+ RESET B Tr A- Tr B+ Tr B- CAUTION X = H or L OBSERVE PRECAUTIONS = from L to H FOR HANDLING... - Page 18 LBI-39152 IC DATA U4 - DUAL WIDE BANDWIDTH OP AMP U5 - MONOLITHIC TIMER RYT 101 6164/1 (4558) RYT 109 6073/1 (145406) D = Driver R = Receiver DI = Data In DO = Data Out...
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Page 19: Outline Diagram
OUTLINE DIAGRAM LBI-39152 ROCKWELL MODEM AND RS-232 INTERFACE CARD ROA 117 2247/1 and ROA 117 2247/2 (1078-ROA 117 2247, Sh. 1, Rev. B) - Page 20 Ericsson Inc. Private Radio Systems Mountain View Road Lynchburg, Virginia 24502 1-800-528-7711 (Outside USA, 804-528-7711) Printed in U.S.A.
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Page 21: Schematic Diagrams
ADDENDUM NO. 1 TO LBI-39152 PURPOSE This addendum corrects typographic errors and reflects recent changes to a modification referenced in this manual. Page 7, Figure 3 The pin number in X5 for “RS-232 TXCLK From GPTC” is incorrect and should be changed from B24 to B25 as shown in the following diagram. - Page 22 SCHEMATIC DIAGRAM LBI-39152 ROCKWELL MODEM AND RS-232 INTERFACE CARD ROA 117 2247/1 and ROA 117 2247/2 (1911-ROA 117 2247, Sh. 1, Rev. C)
- Page 23 SCHEMATIC DIAGRAM LBI-39152 ROCKWELL MODEM AND RS-232 INTERFACE CARD ROA 117 2247/1 and ROA 117 2247/2 (1911-ROA 117 2247, Sh. 2, Rev. C)
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