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T T S 26B
ACTION
Section 3
R E S U L T
i .
I t
is
a s s u m e d that t h e t r u n k with E and M
s u p e r v i s i o n h a s b e e n t u r n e d down to t r a f f i c .
At
t h e m e a s u r i n g T T S 26B p a t c h the M l e a d of the
t r u n k to the r i n g o r the D R O P jack o r to the r i n g
of the E AND M SIGNALING-REG E & M jack, w i t h
a c o r d having a 310-type plug o n the e n d toward
t h e s e t .
j.
R e q u e s t
an
off hook o r a s h o r t c i r c u i t on the
t r u n k to the point w h e r e the s i g n a l s a r e to be
a p p l i e d .
k .
T u r n the FUNCTION s w i t c h to C A L M E T E R
Adjust the M E T E R C A L c o n t r o l to obtain
0
on
the
70
BREAK s c a l e of the m e t e r .
1.
T u r n the FUNCTION s w i t c h to SEND AND R E C ,
R e a d the
7' 0
b r e a k on the
YO
BREAK s c a l e of the
and r e q u e s t the d i s t a n t end to s e n d the s i g n a l to b e
m e t e r of the s e t a t the m e a s u r i n g e n d .
m e a s u r e d i n s t e a d of the off hook o r s h o r t c i r c u i t .
3 . 2 0 MEASURING P E R C E N T BREAK ON
-
T H E E LEAD:
T h e following p r o v i d e s t h e p r o c e d u r e for
-
~ e a s u z n ~
%
B r e a k on an E l e a d ( S e e f i g . 3-3c):
ACTION
R E S U L T
a.
With no power applied to the s e t , c h e c k the
I t should b e o n the 100 l i n e of the
70
BREAK s c a l
p o s i t i o n of the m e t e r p o i n t e r .
(
m e t e r e l e c t r i c a l 0 ) . If i t i s off a d j u s t the
s c r e w on the f r o n t of t h e m e t e r c a s e to b r i n g i t
to t h i s l i n e .
b .
A f t e r a d j u s t m e n t back off the a d j u s t m e n t
s c r e w slightly to r e m o v e m e c h a n i c a l c o n t a c t
b e t w e e n the a d j u s t m e n t s c r e w and the m e t e r
m e c h a n i s m .
T h i s c o m p l e t e s the m e c h a n i c a l adjustment of the
m e t e r e l e c t r i c a l 0.
c .
F I R S T i n s e r t . the 310-type plug of the power
If connection i s not m a d e i n t h i s s e q u e n c e a
s u p p l y p a t c h c o r d i n t o the
48
VOLT j a c k of the s e t
b a t t e r y supply f u s e m a y blow.
If t h e wrong
48-
o b s e r v i n g p r o p e r tip and s l e e v e p o l a r i t y , and t h e n
volt j a c k is u s e d diode p r o t e c t i o n within the s e t
c o n n e c t i t to the 48-volt d c supply.
w i l l p r o t e c t the s e t f r o m d a m a g e , but the s e t
w i l l be i n o p e r a t i v e i n s u c c e e d i n g s t e p s .
d .
T u r n the SEND PPS s w i t c h to any position
T h i s t u r n s the s e t o n .
T h e L I N E ( E ) and DROP
e x c e p t PWR O F F .
( M ) l a m p s should l i g h t . If they do light p r o c e e d
to s t e p f .
If they do not l i g h t p r o c e e d with s t e p
c
e .
If the l a m p s did not l i g h t r e m o v e t h e d c p o w e r
s u p p l y f i r s t , then change the 310-type plug to the
o t h e r
48 VOLT
j a c k , and then r e c o n n e c t the 48-
v o l t d c power supply.
T h e l a m p s should l i g h t .
If they s t i l l d o not the
s e t p r o b a b l y i s not r e c e i v i n g p o w e r .
f .
T o m e a s u r e
(lo
BREAK of g r o u n d and o p e n
p u l s e s o n the E l e a d t u r n the R E C E I V E s w i t c h to
R E C G & O ( E ) , o r if t h i s s w i t c h is u s e d i n fully
c l o c k w i s e position to t r a n s f e r c o n t r o l to the SEND
o r SEND AND R E C s w i t c h t u r n the ( l a t t e r ) s w i t c h
e i t h e r to E & M L I N E , E = G & O , M = B & G o r to
E & M - L I N E E = B & O , M = B & O .
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