DLP-
544
363-206-295
1997
December
1,
Issue
2
of
2
Page
1.
Figure
in
shown
as
equipment
test
and
shelf
DDM-2000
the
Configure
DS3/DS1
ERTS
OPTICAL
OUTPUT
(TX)
DDM-2000
OPTICAL
ATTENUATOR
OPTICAL
SPLITTER
OPTICAL
POWER
METER
OPTICAL
INPUT
(RX)
LOW
SPEED
INPUT
LOW
SPEED
OUTPUT
Configuration
Test
Sensitivity
Receiver
DDM-2000
1.
Figure
optical
on
reading
level
power
obtain
to
attenuator
optical
variable
Set
2.
A.
Table
from
required
as
meter
power
OC-12
for
Settings
Power
Optical
Variable
A.
Table
Levels
Power
OLIU
OC-12
(dBm)
Level
Power
OLIU
23H, 23H-U
−
34
23G, 23G-U
−
31
21G, 21G-U, 21G2-U
−
34
21D, 21D-U
−
Env.)
-31.8(Uncont.
Env.)
33.8(Cont.
Test
Rate
Error
DS1/DS3
the
with
signal
received
DS1/DS3
the
Monitor
3.
10
of
result
(BER)
rate
error
bit
a
insure
and
minutes
30
for
Set
−
10
or
better.
Did
4.
OLIU
test?
BER
pass
If YES then
,
PROCEDURE.
THIS
COMPLETED
HAVE
YOU
STOP.
If NO
with
continue
then
,
5
Step .
fails
test
If
test.
repeat
and
connectors
and
attenuators
optical
Clean
5.
replace
again,
OLIU.