2240 Fiber Optic Modem
9
List of Figures
1-1
Model 2240 Modem .......................................................................................... 11
1-2
Model 2201 Rack Chassis ................................................................................. 13
1-3
Model 2202 Modem Shelf ................................................................................. 14
1-4
2240 Functional Block Diagram ...................................................................... 15
2-1
2240 Standalone Rear Panel Layout ............................................................... 20
2-2
Location of Oscillators ..................................................................................... 21
2-3
Eight-Position Internal Options DIP Switch .................................................. 23
2-4
Factory Setting for CD / DCD or CD / SYNC Switches ................................ 24
2-5
Extra Clock Pins in Tail Circuit Application at Clock Source End ............ 28
3-1
2240 Front Panel Mode / Rate Switches ......................................................... 29
3-2
Typical Tail Circuit Implementation .............................................................. 36
3-3
RS-449 / 422 Null Cable Diagram for 2240 .................................................... 36
3-4
Location of Internal Switches and Jumpers ................................................... 39
4-1
Interchangeable Interfaces ............................................................................... 41
4-2
Transparent Bipolar Interface Connectors .................................................... 74
4-3
Example of Link Between Bipolar and Clocked Interface ............................ 74
4-4
BNC Connectors ............................................................................................... 75
4-5
Available Strapping Options for Programmable Buffered Interface .......... 78
4-6
Board Layout for Programmable Buffered Interface ................................... 79
4-7
Programmable Buffered Interface, Model P53, Basic DCE RS-530 ............ 81
4-8
External Station Programmable Buffered Interface, Model P53,
DCE RS-530 .................................................................................................. 82
4-9
Programmable Buffered Interface, Model P53, External Station ............... 82
4-10 Internal Programmable Buffered Interface, Model P53, DCE RS-530 ....... 83
4-11 Internal Programmable Buffered Interface, Model P53 .............................. 83
4-12 External Programmable Buffered Interface, Model P53, DCE RS-530 ...... 84
4-13 External Programmable Buffered Interface, Model P53 .............................. 84
4-14 Programmable Buffered Interface, Model P53 [DTE] .................................. 85
4-15 Programmable Buffered Interface, Model P53 [Legacy Adapter] .............. 86
4-16 Four TwinAx Connectors (BJ-77, 3-Lug) ....................................................... 90
4-17 Five TwinAx Connectors (BJ-77, 3-Lug) ........................................................ 91
4-18 Interface Card Installation .............................................................................. 93
5-1
Local Loopback from User-End of Fiber Link .............................................. 95
5-2
Remote Loopback from User-End of Fiber Link ........................................... 96
Summary of Contents for 2240
Page 1: ...Modems Model 2240 Fiber Optic Modem Users Manual...
Page 4: ...4 Canoga Perkins Model 2240 Fiber Optic Modem...
Page 15: ...2240 Fiber Optic Modem 15 Figure 1 4 2240 Functional Block Diagram...
Page 34: ...34 Canoga Perkins Table 3 E Standard Oscillator and Divide Factors...
Page 40: ...40 Canoga Perkins This page is intentionally left blank...
Page 92: ...92 Canoga Perkins Table 4 V Models D22 and D88 Connector Pin Assignments...