P
AGE
16
05547-0798 <90-00047>
Check the system.
The order wire system is aligned at the factory. Once installed, it
is ready to operate.
Follow the procedures in the
Operation
chapter to check the
system as a voice circuit and as a data circuit.
Adjusting Signal Levels
Follow the procedures below if you have to check signal levels or, if
you install replacement equipment, to set the levels.
O
RDER
-W
IRE
A
LIGNMENT
To check or set signal levels:
1.
Remove power from the order wire system.
2.
Remove the 46105 module and place switch S2 (LPBK 1) in the ON
position. Refer to Fig. 8 in the
Installation
chapter for the location of
the switch. Reinstall the module.
3.
Apply power to the order wire system.
4.
Connect a 600-ohm load across the signal output of a 600-ohm signal
generator. Set the generator for 1004 Hz and a level of 0 dB. Remove
the 600-ohm load and connect the generator to the XMT DROP jack
on the 44022 module.
5.
Connect a 600-ohm dB meter (bridging) to the channel 1 XMT MON
jack on the front panel of the 46105 module.
6.
Adjust the transmit level on the front of the 44022 module for a read-
ing of -16 dB.
7.
Move the dB meter (bridging) to the channel 1 XMT LVL pin jacks on
the front of the 46105 module.
8.
Adjust the channel 1 transmit level on the front of the 46105 module
for a reading of 0 dB.
9.
Move the dB meter (bridging) to the channel 1 RCV MON jack on the
front panel of the 46105 module.
10.
Adjust the channel 1 receive level on the front of the 46105 module for
a reading of +7 dB.
11.
Terminate the dB meter with 600 ohms and move it to the RCV
DROP jack on the 44022 module.
12.
Adjust the receive level on the front of the 44022 module for a reading
of -13 dB.
13.
Remove the signal generator and dB meter.
14.
Remove power from the order-wire system.
15.
Remove the 46105 module and place switch S2 (LPBK 1) in the OFF
position. Reinstall the module.
INSTALLATION
N
OTE
:
All switch, strap, and level
settings are factory-set.
CONTINUED
. . .