05776-1198 <90-00124>
P
AGE
9
ALIGNMENT PROCEDURES
A
ll straps and levels are factory-set. If necessary, refer to the
steps below to align the 44022, 44118, and 46105 modules.
Equipment Required
♦
Signal Generator sending a 1kHz, 600 ohm signal at various
levels.
♦
600-ohm Level Meter (with and without 600-ohm termina-
tion).
44022 S
UBSCRIBER
L
INE
I
NTERFACE
A
LIGNMENT
P
ROCEDURE
Refer to Fig 7.
1.
Remove power from the shelf.
2.
Plug in the 44022-00 module.
3.
Apply power. No LEDs should light. If the BUSY LED is on, press
the TEST/RST button twice to turn the LED off.
4.
Insert a test tone or test oscillator at the 4W RCV input (pins 2
and 4) or at the LINE RECEIVE test points. Insert a level meter
(unterminated) at the LINE RECEIVE, test points.
Set the frequency to approximately 1 KHz. Set the level to system
test-tone level (-16 dBm).
NOTE:
Any source device that loads down the input must be
disconnected.
5.
Connect the level meter (600 ohm termination) to the DROP RE-
CEIVE jack.
6.
Read -13 dBm. Adjust the RECEIVE level control as required.
RCV PAD is set for -3 to +16 dBm range.
7.
When finished setting levels, press the TEST/RST button. The
OFF HOOK LED goes off.
8.
Remove the meter and test oscillator connections.
9.
Insert the test oscillator at the DROP TRANSMIT jack.
10.
“OFF-HOOK” LED lights.
NOTE:
If the LED does not light, the oscillator is not providing a
resistive path to ground. Place a 600 ohm load across the
oscillator output.
11.
Connect an unterminated level meter across the oscillator termi-
nals.
12.
Set the level to 0 dBm
13.
Move the level meter (terminated) to the LINE TRANSMIT test
points. (The level meter should be unterminated if the VF bridge is
plugged in.)
F
IG
. 7 - F
RONT
P
ANEL
, 44022
CONTINUED
. . .
XMT
DISTRIBUTION
OUTPUT TP
XMT DROP
2W/4W
TEST JACKS
RCV
DISTRIBUTION
OUTPUT TP
RCV LEVEL
ADJUST
44022-00
STATION
INTERFACE
XMT
LINE TP
GND
LINE
DROP
MON
TRANSMIT
DIST
GND
LINE
DROP
MON
RECEIVE
DIST
RCV
LINE TP
RCV DROP
4W
TEST JACKS
STATUS LED
INDICATORS
XMT LEVEL
ADJUST
TEST/RESET
SWITCH
Busy
Inc. Call
Off Hook
B11-44022-00 REV__
TEST
RST
