Figure 69. Circuit Pack Aew3 Switch Locations; Figure 70. Attenuator Locations - AT&T System 85 Installation And Test

2125
CONS
GREEN/RED
RED
TO TRANSMIT (Y0) AT DISTANT END ORPI
(Vi) VIA FIBER OPTIC SUBSYSTEM.
TO RECEIVE (Y1) AT DISTANT END ORPI
(Vol VIA FIBER OPTIC SUBSYSTEM.
SEE
SLIDE SWITCHES
NOTES
LEFT OR RIGHT
POSITION
2125 PLUG - CABLE TO AEW4 CIRCUIT PACK
Notes:
1. Switch 1 is used in balancing the lightguide.
Settings are TST or NORMAL.
2. Switch 2 is used to select power level for the
transmitter. Settings are HALF or FULL.
3. Switch 3 is used for factory test only. Ensure
that S3 is in the NORMAL position (as shipped
from the factory) when performing the
balancing tests.
4. Switch 4 is not used.
Figure 69. Circuit Pack AEW3 Switch Locations
AEW3
YO
ATTENUATOR A
LCIT
FIBER
OPTIC
LOOP
LCIT
ATTENUATOR B
Y1
AEW3
4
LOOP-
AROUND I 3 I NORMAL
401M 4011,
FULL
F---1
HALF
B,C,M
TEST
r--- ]
NORMAL
TRANSMIT
RECEIVE
Figure 70. Attenuator Locations
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