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NEC TTS 26B Instruction Manual page 26

Pulse signaling test set

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TTS
26B
Section 3
ACTION
RESULT
f .
Turn the SEND o r SEND AND REC switch to
the sending mode desired for the outgoing signal
and circuit.
CAUTION
When the switch i s in the extreme clock-
wise position the DROP toggle switch
must be operated to the desired
E
=G&O
or E =G&B position.
g.
Operate the FUNCTION key to
SEND OSC.
h.
Turn the FUNCTION switch to GAL
METER.
i.
Turn the
FUNCTION
switch to GAL
%
BREAK
j.
Connect the circuit on which the repeated o r
converted pulses aye to be sent to the appropriate
LOOP SIGNALING, o r E & M
SIGNALING
sending
jack, as covered
in
the paragraphs on sending
procedures.
k.
Turn the RECEIVE switch to the required
receiving mode.
If this corresponds to the estab-
l i s hed mode indicated by the already established
setting of the SEND or
SEND
AND REC switch the
RECEIVE switch may be turned to the e x t r e m e
clockwise position instead.
1.
Turn the METER
CIRCUIT
switch to
%
BREAK
DIRECT
m. Connect the circuit with the incoming signals
to the EXT DIAL jack or terminals.
n.
T u r n the EXT DIAL CIRCUIT switch to the
applicable position in the following tabulation:
( I )
DIAL RELAY LOOP
(2) DIAL RELAY LOOP
(3)
DIAL
RELAY M
(4) DIAL RELAY E
Adjust the METER CAL control to obtain
0
on
the
%
BREAK scale of the m e t e r .
Adjust the
ADJ
70
BREAK
control to the
OJo
break
desired for the outgoing signal of the m e t e r .
Do not change this setting i n subsequent steps
F o r wet loops this setting should be REC
3 3 & G
ON LOOP (or SEND LOOP, REC B&G), and for
d r y loops this should be REC LOOP ( o r SEND
LOOP, REC LOOP).
If the c i r c u i t has high inductance o r capacitance
which may 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.
Used when d r y contact pulsing i s received
on a loop o r i s generated by a dial.
Used when wet contact pulsing i s received
on a loop.
Used to receive battery and open o r battery
and ground pulses on an M'lead.
Used to receive ground and open pulses on
an
E lead.

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