Advertisement
TTS 26B
Section 3
NOTE 1: To send b a t t e r y and ground, o r battery and open on a d r y loop, a s into the d r y winding of
a r e l a y , the preceeding is followed through s t e p h.
Then (the FUNCTION key being r e s t o r e d
to SEND DIAL and the e x t e r n a l s o u r c e being patched to the EXT DIAL jack o r t e r m i n a l s )
the E X T DIAL CIRCUIT s w i t c h should be turned to DIAL RELAY-LOOP, and the SEND o r
SEND AND REC switch to the E & M
-
LINE ( E =G&O, M =B&G) position for sending b a t t e r y
and ground, o r the E&M-LINE ( E =G&O, M =B&O) position f o r sending b a t t e r y and open.
The c i r c u i t over which the p u l s e s a r e to be sent is patched to the L O O P SIGNALING-SEND
B&G jack, tip and r i n g , with
a
2- o r 3-conductor c o r d having
a
310-type plug on the end
toward the s e t .
3.16 SENDING ON THE E OR M LEAD.
The following provides the p r o c e d u r e f o r Sending Signals on
e i t h e r the E lead o r the M lead.
ACTION
RESULT
a.
With no power applied to the s e t , check the
It should be on the 100 line of the
70
BREAK s c a l e
position of the m e t e r pointer.
( m e t e r e l e c t r i c a l 0 ) . If i t i s off adjust the s c r e w
on the f r o n t of the m e t e r c a s e to bring i t to this
-
line.
b.
After adjustment, back off the adjustment
This c o m p l e t e s the m e c h a n i c a l adjustment of
s c r e w slightlyto r e m o v e mechanical contact
the m e t e r e l e c t r i c a l 0.
between the adjustment s c r e w and the m e t e r
mechanism.
c .
FIRST i n s e r t the 310-type plug of the power
If connection i s not m a d e i n this sequence a
supply patch c o r d into the 48 VOLT jack of the s e t
battery supply f u s e m a y blow.
If the wrong 48-
observing the p r o p e r tip and s l e e v e polarity, and
volt jack i s used diode protection within the s e t
then connect i t to the 48-volt dc supply.
will 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
will be inoperative i n succeeding s t e p s
.
d.
T u r n the
SEND PPS
switch to the d e s i r e d
This t u r n s the s e t on.
T h e LINE ( E ) and DROP
pulse r a t e if the i n t e r n a l oscillator is to be u s e d
(M) l a m p s should light.
If they do light proceed
a s the s o u r c e of signals.
If a d i a l o r o t h e r e x t e r n a l
to s t e p f.
If they d o not light proceed with s t e p e .
s o u r c e i s to b e u s e d , turn the switch to any
position except PWR O F F .
e .
If the LINE ( E ) and DROP ( M ) l a m p s did not
light r e m o v e the dc power supply f i r s i , then
change the 310-type plug to the other 48 VOLT
jack and then reconnect the 48-volt dc power supply.
f.
If the i n t e r n a l oscillator is to b e u s e d a s the
s o u r c e of p u l s e s , o p e r a t e the FUNCTION key to
SEND OSC.
If a d i a l o r other e x t e r n a l s o u r c e of
p u l s e s i s to be u s e d , r e s t o r e the FUNCTION key
to SEND DIAL.
T u r n the EXT DIAL switch to
DIAL RELAY -B&G, and connect the e x t e r n a l d i a l
o r o t h e r s o u r c e of pulsing to the EXT DIAL jack
o r t e r m i n a l s , tip and ring.
g.
T u r n the FUNCTION switch to CAL
METER.
h.
T u r n the FUNCTION switch to CAL
$%
BREAK.
The l a m p s should light.
If they s t i l l do not the
s e t probably
is
not receiving power.
The i n t e r n a l o s c i l l a t o r p u l s e s a t the r a t e d e t e r -
mined i n s t e p d. If a d i a l o r other e x t e r n a l s o u r c e is
u s e d , a s e r i e s of z e r o s m u s t b e dialed o r the
e x t e r n a l s o u r c e m u s t be o p e r a t e d during the
calibration p r o c e d u r e .
Adjust the METER CAL 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 .
Adjust the ADJ
70
BREAK c o n t r o l to the d e s i r e d
70
b r e a k a s indicated on the m e t e r ,
If a d i a l i s
used to g e n e r a t e the s i g n a l , d i a l a s e r i e s of
z e r o s when adjusting to the d e s i r e d
O/o
b r e a k .
Advertisement
