CANOGA PERKINS 2240 Fiber Optic Modem - Manual (Page 82)

82
Canoga Perkins
4.9.3 External Station
The External Station is used when an external station clock is providing timing (see
Figures 4-8 and 4-9). When connecting KG or KIV encryptors together on the
Black side, using an external timing device you should install the external station
clock strapped header in the J3 position. In this application, the modems are acting
as the network, although the timing input is from an outside source. The modem in
which the timing source is connected should be set for external and the other
modem set for slave. This header is provided with the interface.
Figure 4-9.
Programmable
Buffered Interface,
Model P53,
External Station
Figure 4-8.
External Station
Programmable
Buffered Interface,
Model P53,
DCE RS-530
Typical External Station Clock Application
KG Swing
Jumpers
Internal
Clock From
Modem
Rx Data
Tx Clock
Tx Data
Modem
Alarm
From
Fiber
To
Fiber
Delay
Line
Inverter
FIFO
Data Out Data In
Shift Out Shift I n
W19
W20
8
SG
FG
CTS
DSR
RTS
FIFO
Clock
SCTE
TxD xD
From Modem
To Modem
To Modem
10
3
16
17
9
15
12
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
- 2
5)
7
1
5
13
22
19
18
21
6
4
Wire Wrap
3-6
4-9
5-7, 14 & 17
8-18
12-19
Net List
P/N 6100030-004
CANOGA PERKINS
Data
Rx Tx
Clock
Rate mode
Pwr Loop
On Rem/Loc
2270
Fiber
Modem
Optics
TX RX
Off
CANOGA PERKINS
Data
Rx Tx
Clock
Rate mode
Pwr Loop
On Rem/Loc
2270
Fiber
Modem
Optics
TX RX
Off
MM or SM
Fiber Optics
KG/KIV
RED BLK
Station
Clock
KG/KIV
RED BLK
P/N 6100030-004