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Section 3
TTS 26B
ACTION
o.
Turn the FUNCTION switch to
SEND
AND REC.
p.
Restore the FUNCTION key to SEND DIAL.
3 . 2 6 SPECIAL FUNCTIONS
RESULT
The repeated o r converted pulses with the prede-
termined O/o b r e a k should then be outgoing on the
selected c i r c u i t .
3 . 2 7
The following i s the procedure for Pulsing and Open and Short on the Sleeves of the LOOP SIGNAL-
ING
SEND
1 and 2 , .and the REC LOOP jacks:
ACTION
RESULT
a. With no power applied to the s e t , check the
I t should b e on the 100 line of the
%
BREAK
position of the m e t e r pointer.
s a c l e ( m e t e r e l e c t r i c a l 0)
If i t is off adjust the
s c r e w on the front of the m e t e r c a s e to bring i t
to this l i n e .
b.
After adjustment, back off the adjustment
s c r e w slightly to remove contact 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
supply patch cord into the 48 VOLT jack of the s e t
observing proper tip and sleeve polarity, and then
connect i t to the 48-volt d c supply.
d.
Turn the SEND
PPS
switch to the d e s i r e d
pulse r a t e if
the
i n t e r n a l oscillator is to be used
a s the s o u r c e of signals.
If a d i a l o r other external
source is to be used turn the switch to any position
except P W R
OFF.
e.
If the lamps did not light remove the dc power
supply f i r s t , then change the 31 0- type plug to the
other 48 VOLT jack, and then reconnect the 48-
volt dc power supply.
f . If the internal oscillator i s to b e used a s the
source of pulses, 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 source of
pulses i s to be used, r e s t o r e the FUNCTION key
to DIAL RELAY-B&G, and connect i t to the EXT
DIAL jack o r t e r m i n a l s .
g.
Turn the FUNCTION switch to CAL METER.
h.
Turn the FUNCTION switch to ADJ
%
BREAK
If connection i s not made in this sequence a
battery supply fuse may blow. If the wrong
48-
volt jack is used diode protection within the s e t
will protect the s e t f r o m damage, but the s e t
will be inoperative in succeeding s t e p s .
This turns the s e t on.
The LINE (E) and DROP
(M) l a m p s should light. If they do light proceed
to s t e p f. If they do not- light proceed to s t e p e.
The l a m p s should light, If they s t i l l do not the
s e t i s probably not receiving power.
If the internal oscillator
is
used this s t a r t s i t
pulsing a t the r a t e determined i n s t e p d . If a
dial o r other external s o u r c e
is
used a s e r i e s of
z e r o s m u s t be dialed o r the external s o u r c e
must be operated during the calibration procedure
Adjust the METER GAL control to obtain
0
on
the
O/o
BREAK s c a l e of the m e t e r .
Adjust the ADJ
%
BREAK control to the d e s i r e d
O/o 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 generate the signal, dial a s e r i e s of
z e r o s when adjusting to the d e s i r e d
%
b r e a k .
i. Turn the SEND.or SEND AND R E C switch to
SEND LOOP-REC LOOP.
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