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TTS 26B
Section 3
ACTION
RESULT
d.
Turn the SEND P P S switch to any position
This turns the s e t on.
The LINE ( E ) and DROP
except PWR O F F .
(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 step e.
e.
If the l a m p s did not light remove the dc power
The l a m p s should light.
If they s t i l l do not the
supply fir s t , then change the 31 0-type piug to the
s e t probably i s not receiving power.
other 4
8
0
~
~
jack, and then reconnect the 48-
volt dc power supply.
f.
F o r wet loop c i r c u i t s turn the RECEIVE switch
to B&G ON LOOP, o r if this switch i s used in
the fully clockwise position to transfer control to
the SEND o r SEND AND REC switch, turn the
( l a t t e r ) switch to SEND LOOP-REC B&G. F o r d r y
loop c i r c u i t s t u r n the RECEIVE switch to REC
LOOP, o r if this i s used in the fully clockwise
position to t r a n s f e r control to the SEND o r SEND
-
A N D R E C s w i t c h , turnthat(1atter)switchto
SEND LOOP-REC LOOP.
If the s e t i s being used
for simultaneous sending with this switch in the
SEND LOOP-REC LOOP position, the turnbutton
in the lower left c o r n e r of
the
panel MUST be
turned to SEND R T ON
1&2.
g.
Turn the METER CIRCUIT switch to
70
BREAK
If the circuit has high inductance o r capacitance
DIRECT
.
that m a y d i s t o r t the pulse wave shape, the
METER CIRCUIT switch should be turned to
%
BREAK THRU METER RELAY instead o r
erroneous readings may b e obtained.
h.
The FUNCTION, LINE (E) AND DROP (M)
keys should be n o r m a l unless required f o r simul-
taneous sending.
The EXT DIAL CIRCUIT switch
i s not in the measuring circuit.
The SPARK SUP.
turnbutton i s not involved.
i.
It i s assumed that the loop circuit involved
has been turned down to traffic. At the measuring
TTS 26B patch the circuit to the LOOP SIGNAL-
ING-REC LOOP jack, with a cord having a 310
type plug on the end toward the set.
If a wet loop
i s involved the battery
( - )
should b e on the tip and
ground
(t)
on the ring.
j.
Request an off hook o r s h o r t circuit at the
point where the signals a r e to
be
applied.
k.
Turn the FUNCTION switch to CAL METER.
Adjust the METER CAL control to obtain 0 on
the
70
BREAK scale of the m e t e r .
1. Turn the FUNCTION switch to SEND AND-REC,
Read the
70
BREAK on the
7 0
BREAK s c a l e of the
and request the distant end to send the signal to
m e t e r of the s e t at the measuring end.
be measured instead of the off hook o r s h o r t c i r -
cuit.
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