CANOGA PERKINS 2240 Fiber Optic Modem - Manual (Page 6)

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Canoga Perkins
3. Mode and Rate Selection.............................. 29
3.1 Operating Mode / Data Rate Selection .....................29
3.2 External Clock Modes ................................................31
3.2.1 Sampled External Clock Mode - Mode 0 ............................... 31
3.2.2 Locked External Clock Mode - Mode 7 ................................. 32
3.3 Internal Clock Modes - Modes 1, 2, 3, 4 ...................32
3.3.1 Standard Internal Clock Rates (Groups 1, 2 and 3) ............... 33
3.3.2 Custom Internal Clock Rates (Group 4) ................................. 33
3.4 Slave Clock Mode - Mode 5 .......................................35
3.4.1 Loopback Clock for Slave Mode............................................ 35
3.5 Asynchronous Mode - Mode 6 ....................................35
3.6 Consideration of Propagation Delays .......................37
3.7 Internal Clock Option Switches .................................38
3.7.1 TBL / NORM Switch ............................................................. 38
3.7.2 CLK / EXT Switch ............................................................... 38
4. Data Interfaces .............................................. 41
4.1 Data Interfaces Overview ...........................................41
4.2 RS-423 / 232D Model 432 ..........................................42
4.2.1 RTS_BIAS Jumper ............................................................... 44
4.2.2 DCD Jumper ......................................................................... 44
4.2.3 CTS_GATE Jumper .............................................................. 44
4.2.4 DSR Jumper .......................................................................... 45
4.2.5 CH_GND Jumper ................................................................. 45
4.3 RS-449 / 422 Model 422 .............................................45
4.3.1 RS_BIAS Jumper ................................................................. 48
4.3.2 RR Jumper ............................................................................ 48
4.3.3 CS_GATE Jumper................................................................. 48
4.3.4 DM Jumper ........................................................................... 49
4.3.5 CH_GND Jumper ................................................................. 49
4.3.6 UNBAL_REF Jumper .......................................................... 49
4.4 RS-530 Interface Model 430 ......................................50
4.4.1 RTS_BIAS Jumper ............................................................... 52
4.4.2 DCD Jumper ......................................................................... 52