CANOGA PERKINS 2240 Fiber Optic Modem - Manual (Page 75)

Chapter 4 Data Interfaces
Programmable Buffered Interface/Model P53
75
4.9.4 Internal
The internal function is used when network equipment is set for Eternal Timing (see Figure 4-10
and Figure 4-11). When connecting KG or KIV encryptors together on the Black side, you should
install the internal strapped header in the J3 position. In this application, the modems are acting
as the network timing source. In most cases, both modems should be set for internal master
clock. The rate switches should be set to the appropriate speed for the circuit. This header is
provided with the interface. The figures below show a typical internal clock application.
Figure 4-10 Internal Programmable Buffered Interface, Model P53, DCE RS-530
Figure 4-11 Internal Programmable Buffered Interface, Model P53
CANOGA CANOGA PERKINS PERKINS
Data Data
Rx Rx Tx Tx
Clock Clock
Rate mode Rate mode
Pwr Pwr Loop Loop
On On Rem/Loc Rem/Loc
2270 2270
Fiber Fiber
Modem Modem
Optics Optics
TX TX RX RX
Off Off
CANOGA CANOGA PERKINS PERKINS
Data Data
Rx Rx Tx Tx
Clock Clock
Rate mode Rate mode
Pwr Pwr Loop Loop
On On Rem/Loc Rem/Loc
2270 2270
Fiber Fiber
Modem Modem
Optics Optics
TX TX RX RX
Off Off
MM or SM
Fiber Optics
KG/KIV
RED BLK
KG/KIV
RED BLK
RLSD
KG Swing
Jumpers
Internal
Clock From
Modem
Rx Data
Tx Clock
Tx Data
Modem
Alarm
Function
From
Fiber
Circuits
To
Fiber
Circuits
Delay
Line
Inverter
FIFO
Data Out Data In
Shift Out Shift I n W19
W20
8
10
3
16
17
9
12
15
SG
FG
CTS
DSR
RTS
FIFO
Clock
SCTE
TxDxD
From Modem
To Modem
To Modem
5
12
19
13
14
16
17
18
3
4
9
6
1
2
11
10
15
7
8
20
23
24
11
2
14
LL
RL
SCT
RxD
SCR
IN
OUT
J1(DB - 25)
7
1
5
13
22
19
18
21
6
4
P/N 6100030-005
Wire Wrap
Net List
6-13
7-17
8-18
9-19
10-14
11-15