Specifications

5.4 FIBER OPTIC TRANSMITTER/RECEIVER MODULE (DEC.t 54-16010)
FUNCTIONAL DESCRIPTION
The fiber o~tic transmitter/receiver module is used to drive the fiber
o~tic cable. The data in~uts to the module are ECl level sisnals. the data
outputs from the module are Eel level si~nals. Also out~ut from the module is
the link available si~nal, used to indicate that the lisht received is above a
minimum value as determined b~ the sauelch circuitr~.
NOTE: the link available sisnal assereted indicates that lisht is beins
received. It does not mean that the fiber optic link is functional.
BLOCK DIAGRAM
FIBER CABLE --------- ------------
(receive) ----)IPIN 1------)1 h~brid
I diode I I receiver 1-----------) ECl DATA OUT
1 sauelch 1-----1 link 1-----) link
------------ I available 1 available
ECl DATA IN-----)I driver 1-----)1 L.E.D. 1------) FIBER CABLE
(trasmit)
the FOT/R has four sections. These are: 1. the h~brid receiver, 2. the
sauelch circuit, 3. the link available circuit and 4. the transmit L.E.D.
driver.
SIGNAL
DESCRIPTION
40
pin
corlnector,
Female
----~-~------~-----------~--~---
pins
1,2,3,4
+5v
~irls
5,6,11,12,
SNIt.
29,30,32,33,
34,36,37,38,
40
pins
7,8,9,10
+12v
pins 13,14,15,16
-12v
pins 17,18,22,
N.C.
23,24,25,26,
27,28
pin
19
link
avail H
pin
20
link avail
L
pin
21
~<mi t
on H
pin
31
ecl
t}~
data
l
pin
35
ecl
t>~
data H
pin
39 ecl
bip
data
l