TM 11-6625-596-12
c.
Telephone Efficiency Send-Acoustical Test.
panel meter pointer should read between 40 and 60.
front panel controls as listed in TB 11-6625-596-12/1.
b.
Dial Percent Break Test. Perform the starting
The panel meter pointer should read at-midscale; if it
does not, adjust the METER SENSITIVITY CALIBRATE,
button. Adjust the DIAL BREAK CALIBRATE control
control to bring the pointer to the red midscale line.
until the panel meter pointer reads on the red midscale
Place the telex phone handset in the coupler (fig. 1-3).
line. If a dial has been installed in a telephone set,
The receiver
must
fit squarely
over the test
connect TEL LINE terminals, L1 and L2 to the
loudspeaker. Be sure to tape the handset switch to on
corresponding terminals on the telephone set, and lift the
while testing. Connect TEL LINE terminals L1 and L2 to
handset off the cradle switch, Connect TEL LINE
terminals L1 and L2 to the dial. To test, depress the
the corresponding terminals on the telephone set. For
TEST button and, with the free hand, dial 0 (operator).
the first test, depress the LONG LINE button. Good
The panel meter pointer should read between 40 and 60.
scale readings are given in the pertinent table in TB 11-
Perform the stopping procedure (para 2-19). 2-13. Line-
6625-596-12/1. For the second part of this test, the
Level and Click Suppression Varistor Tests
TEST CONDITION switch is set at TEL LINE, and
VALUE C control as listed in the pertinent table.
2-13. Line-Level and click suppression
Depress the LONG LINE button. Good scale readings
varistor test
are listed in the table in TB 11-6625-596-12/1. Perform
a.
Click Suppression Varistor Test. Perform the
controls as listed in TB 11-6625-596-12/1. Remove the
d.
Telephone Efficiency Receive-Electrical In- put,
varistor from the telephone set and connect it to the
Acoustical Readout. Perform the starting procedure
ARTIFICIAL RECEIVER terminals. Press the LONG
LINE button and adjust the METER SENSITIVITY
11-6625-596-12/1. The panel meter pointer should read
CALIBRATE, control so that the panel meter pointer
at midscale; if it does not, adjust the METER
reads on the red midscale line. To test, depress the
SENSITIVITY CALIBRATE, control to bring the pointer to
SHORT LINE button. The panel meter pointer should
the red midscale line. Place the telephone handset in
read on the green scale.
Perform the stopping
test loudspeaker. Tape the handset switch to on while
b.
Transmit Varistor Test. Perform the starting
testing. Connect TEL LINE terminals L1 and L2 to the
corresponding terminals on the telephone set. To test,
listed in TB 11-6625-596-12/1. Remove the transmitter
depress the LONG LINE button. Good scale readings
and receiver from the telephone handset. Connect the
are listed in the pertinent table. Perform the stopping
ARTIFICIAL RECEIVER terminals to the telephone
procedure (par 2-19).
handset wires that have been removed from the receiver.
Connect the ARTIFICIAL MICROPHONE terminals to
2-12. Telephone Dial Tests
the telephone handset wires that have been removed
from the transmitter. Connect TEL LINE terminals L1
a.
Dual Speed Test.
and L2 to the corresponding terminals on the telephone
Perform the starting
set. Depress the LONG LINE button and adjust the
METER SENSITIVITY CALIBRATE, control until the
switch. Adjust the DIAL SPEED CALIBRATE, control
panel meter pointer reads on the red midscale fine. For
until the panel meter pointer reads on the red midscale
the first part of the test, depress tn SHORT-LINE button.
line. If a dial has been installed in a telephone set,
The panel meter pointer should read on the green scale.
connect TEL LINE terminals L1 and L2 to the
Next, set the TEST COINDITION switch to ART REC,
corresponding terminals of the telephone set, and lift the
and VALUI controls C and D to the values given in the
handset off the cradle switch. Connect TEL LINE
table in TB 11-6625-596-12/1 pertinent for this setting of
terminals L1 and L2 to the dial. To test, depress the
the TEST CONDITION switch. Depress the LONG LINE
TEST button and, with the free hand, dial the number 0
button and adjust the METER SENSITIVITY
(operator). The
CALIBRATE, control so that the
2-9