P
AGE
10
44443-1098 <90-00059>
The procedure assumes the Term Set is switched to the 600 ohm,
2-wire line. For accurate readings, use fixed resistors for calibra-
tion loads in place of connecting lines or equipment. Set signal
source levels across fixed resistors before connecting to the module.
NOTE
: If the Term Set is switched to the 900 ohm, 2-wire setting,
substitute 900 for 600 when used in reference to the 2-wire
line.
Abbreviations:
♦
600 T = Terminate in 600 ohm load.
♦
600 B = Bridging Unloaded measurement using 600 ohm refer-
ence scale (dBm).
T
ABLE
B - 44443-00/-01 C
HECK
-
OUT
P
ROCEDURE
RESULTS
Measure XMT tone level. Adjust XMT
attenuator front panel switches for re-
quired level. (0 dBmO)
Measure 2-wire transmit tone level. Adjust
RCV attenuator front panel switches for re-
quired level. (0 dBmO)
Measure minimum tone level. Adjust
S3-1 thru S3-6 for minimum level.
ACTION
Remove Term Set and insert extender card
in its place. Insert Term Set into extender
card.
When aligning -01, energize ILT relay. (Do
not energize if strapped for Echo Suppres-
sion Override.)
Use AC voltmeter (600 T) to set 1 KHz, 600
ohm tone source for 2-wire receive test tone
level per system requirement (0 dBmO). Re-
move meter and insert source at 2W IN jack.
Insert AC voltmeter (600 T) at 4W XMT jack.
Remove source and AC voltmeter. Use AC
voltmeter (600 T) to set source for 4W RCV
test tone level per system requirement
(0dBmO). Remove meter and insert source at
4W RCV jack.
Insert AC voltmeter (600 T) at 2W IN jack.
Remove meter but leave source connected to
4W RCV jack.
Insert AC voltmeter (600 T) at 4W XMT jack.
(Be sure that 2-wire side is connected to sys-
tem equipment or line.)
Remove test equipment. Normalize the ILT
relay and return the Term Set to normal
configuration.
STEP
1
2
3
4
5
6
7
8
9
INSTALLATION
