EFJohnson 3000 SERIES - Manual (Page 37)

SYSTEM RACK
4-11
11. Remove CIMs from rack and patch cords from
J1-J2.
VTM PCM Bank Verification
This requires the use of one CIM and one VTM1.
1. Verify the VTM1 card is in Shelf 1-slot 2.
2. On the VTM1 connect a Transmission Test Set to
TP1 and TP2 (common).
3. On the VTM1 set S2 to select the 1020 Hz alignment
tone. The tone should be heard in the Test Set
speaker. Adjust the monitor volume as necessary.
4. Set the CIM for System Test "1".
(S5, section 1 open; sections 2,3,4 closed.)
5. Place the module in any slot on Shelf 1.
6. Connect a Transmission Test Set with the common
lead in CIM connector J13.
•
Verify -3 dBm
±
0.5 dB at TP3
(adjust R83 if necessary).
•
Verify -12 dBm
±
0.5 dB at J12
(adjust R44 if necessary).
7. Move the module to a slot on Shelf 2.
•
Verify -3 dBm
±
0.5 dB at TP3.
•
Verify -12 dBm
±
0.5 dB at J12
8. Move the module to a slot on Shelf 3.
•
Verify -3 dBm
±
0.5 dB at TP3.
•
Verify -12 dBm
±
0.5 dB at J12
9. Move the module to a slot on Shelf 4.
•
Verify -3 dBm
±
0.5 dB at TP3.
•
Verify -12 dBm
±
0.5 dB at J12
10.Set the CIM to System Test “0”.
(S5 all sections closed.)
11. Remove the CIM from the rack.
4.2.10 FINAL CONFIGURATION VERIFICATION
NOTE: Make sure both power supplies are turned
OFF.
1. Disconnect AC Power Cables from AC power
source.
2. All PTMs should be installed and configured as
follows:
Switch
Sections Closed Sections Open
S5, S7 2,5,6,7 1,3,4
S6, S8 2,5,6 1,3,4,7,8
3. Select one of the six Backplane boards for
measuring. Measurements can be made on any of
the 64-pin connectors on the Backplane selected.
4. All measurements should be referenced to ground
(pins 9, 10, 41 or 42) unless otherwise noted.
5. All test readings should be within 5% of the
following specifications:
Pins Ohms
16/48 37.5
17/49 37.5
18/50 37.5
19/51 75.0
20/52 37.5
21/53 37.5
22/54 100 (measured to +5V DC*)
23/55 37.5
24/56 100 (measured to +5V DC*)
* Pins 11, 12, 43 or 44.
6. On the top Backplane board, the following
measurements should be referenced to ground (pins
9, 10, 41 or 42).
Center Pin of Ohms
J5 37.5
J6 37.5
J23 19.2
J24 19.2
NOTE: The four readings should be ±1 ohm from
the test specifications.
7. Test is complete.