CANOGA PERKINS 2240 Fiber Optic Modem - Manual (Page 76)

Chapter 4 Data Interfaces 2240 Fiber Optic Modem User Manual
Programmable Buffered Interface/Model P53
76
4.9.5 External
The External function is used when network equipment is set for Network or Internal Timing (see
Figure 4-12 and Figure 4-13). When connecting KG or KIV encryptors on the Red side to a DTE
device, you should install the external strapped header in the J3 position. In this application, the
modems are acting as an extension of the Red side cable in a true tail circuit. The modem at the
Red end is set for external clock and the modem at the DTE end is set for slave clock. This
header is provided with the interface.
Figure 4-12 External Programmable Buffered Interface, Model P53, DCE RS-530
Figure 4-13 External 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
DTE
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
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
RLSD
RxD
SCR
IN
OUT
J1(DB - 25)
7
1
5
13
22
19
18
21
6
4
P/N 6100030-001
Wire Wrap
Net List
3-6
4-9
5-16
7-17
8-18
12-19
10
3
16
17
9
12
15