TM 11-6625-596-12
Section III. OPERATION OF TELEPHONE TEST SET TS-716/U
NOTE
2-9. Types of Operation
The panel meter pointer will normally
The test set may be used to perform eight different basic
fluctuate slightly. Set the calibrate control
so that the pointer swings equally to the left
several different tests will be performed on one piece of
and right of the red CAL line.
equipment such as a telephone station set
(c) Depress the METER ADJ button. Adjust the
2-10. Operating Procedure
METER SENSITIVITY CALIBRATE, control until the
a. Equipment Starting Procedure. To insure
panel meter pointer again reads on the red midscale line.
starting of the TS-716/U without damage to any of its
components, adhere rigidly to the following procedure:
(d) Set up the coupler with the test microphone
(1) Connection checks. Make all connections
directly over and touching the screen of the test
loudspeaker. Turn the NOISE GENERATOR switch to
(2) Preliminary settings.
DRIVER.
Readjust the METER SENSITIVITY
Control
Setting
CALIBRATE, control until the panel meter pointer reads
on the red midscale line.
Power switch ...........................
OFF
NOISE GEN ADJ .....................
Depressed
(e)
Depress the EARPHONES button.
CALIBRATE:
NOISE GENERATOR
.
Fully ccw
(f)
Set the LEVEL and VALUE controls as
METER SENSITIVITY. .
Fully ccw
follows;
A......................................... 10
DIAL SPEED ...................
Fully ccw
B......................................... 8
DIAL BREAK ...................
Fully ccw
C ........................................ 6
LOAD
D ........................................ 9
TEST CONDITION ..................
COUPLER
MICROPHONE LOAD .............
OFF
(g) Push the 1 LOW, the 2 CENTER, and the 3
RECEIVER LOAD ...................
OFF
HIGH buttons. In each case the. panel meter pointer
MICROPHONE CURRENT .....
OFF
should read in the green region; if it does not, the
LEVELA,B,................................
Any
equipment is not operating properly.
VALUE C, D..............................
Any
(3)
,Starting operations
NOTE
(a) Turn the power switch on and allow 30
minutes for the equipment to warm up.
(b) Adjust
the
NOISE
GENERATOR
If an abnormal indication-is obtained during
CALIBRATATE, control until the panel meter pointer
the starting procedure or the tests, refer to
moves to the CAL position (red mark at midscale)
corrective measures.
2-7