AT&T Bell System Plant Series Alignment Instructions page 4

ISS 1, SECTION 107-302-500
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TABLE A
20A Toll Testboard Controls
Distortion
Calibrator
Keys Switches
Panel
I
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DMS
TMR FRR
LEV-OUT
TMS
CHAN GEN
DIST GEN
TST MULT CONT SG
BIAS HI SEL SPEED CTR MODE
OFF SGL INT MDM
REAR
DTA NOR
BIAS
KEYS
SUPV
SND FRS
LO
SEND
TMR
LEV CHK SUPV
DLY
TST TMS
DISTt
FRONT
KEYS
DLY SUB DATA
I
DISTt
DMO SND
AGC READ
READ
I
TEST
SETTINGS
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All keys initially normal. Where no setting is indicated, key and switch positions remain the same as previous t~st.
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Expected Action If
Action
Results
Test Fails
SND
Read -14.9
±1
dbm
LEY
ALL
1. Fl, normal level SND NOR
1
95.5
4
POS
OFF SG2 INT
MDM
Hold READ key
on transmission
measuring equipment. Perform tests 2 to 6.
TST
operated.
(LEVl and LEV2
relays released)
Hold READ key
Read -9.9
± 1
dbm on If 1 to 6 fail,
2. Fl, high level SND HI
RDM
;
TME.
troubleshoot modulator
operated.
i
LEV2 relay operated. section.
Hold READ key
!
Read -26.9
±1
dbm on
If 1 to 4 fail,
3. Fl, low level LO TME.
operated.
LEVl operated.
troubleshoot CP31.
Read -35.9 ±1 dbm on
If any of 1 to 4 fails,
4. Fl, below AGC level
SUB Hold READ key TME.
check operation of
AGC operated.
LEVl and LEV2 relays
operated.
LEVl and LEV2 relays.
Hold READ key
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operated.
Read -9.9 ±1 dbm on If 5 fails, troubleshoot
5. F2, normal level NOR Plug rear termina]
test cord into /
TME.
CP31.
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GS jack. I
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