Table 7-11. Dial Calibration Test
Control settings
Performance
Test
Step
Equipment
Test procedure
standard
under test
No
equipment
a Adjust
a None.
OUTPUT ATTENUA-
Function switch: SET LEVEL.
AN/USM-207
1
TORS of TS-421(*)/U until a read-
Signal INPUT control: Maximum
SENSITIVITY: 10V.
ing of 7.75 volts is obtained on
POWER: TRACK
clockwise.
TS-723(*)/U meter. Adjust FRE-
DISPLAY: MIDRANGE.
Meter range switch: 10.
QUENCY control of TS-421(*)/U
Frequency RANGE switch: Xl.
Time base switch: 1.
until AN/USM-207 indicates ex-
FUNCTION: FREQ.
actly 20Hz.
TS-421(*)/U:
b. FREQUENCY tuning dial indicates
b. Turn function switch of TS-
FREQUENCY RANGE switch:
723(*)/U to DISTORTION, and ad-
between 19.6-20.4 Hz
Xl.
just its tuning and BALANCE con-
OUTPUT ATTENUATOR
(DB)
trols to minimum indication on
(o-loo): 100.
meter.
ATTENUATOR (DB) (010): 10.
IMPEDANCE switch: 600.
a. Set function switch to SET LEVEL.
a None.
Same as step 1.
Same as step 1.
Tune TS-421(*)/U for output of
50 Hz., as indicated on AN/USM-
207. TS-723(*)/U meter should
indicate 7.75 volts. If it does not,
adjust TS-723(*)/U AMPLITUDE
control until it does.
b.
b. Frequency tuning dial indicatea
Set function switch to DISTOR-
TION. Adjust TS-723(*)/U FRE-
between 49 and 51 Hz.
QUENCY and BALANCE controls
to minimum indication on meter.
a.
a None.
Same as step 1.
Set the function switch to SET
Same as step 1.
LEVEL. Tune TS-421(*)/U for
output of 100 Hz as indicated on
AN/USM-207. TS-723(*)/U
meter should indicate 7.75 volts.
If it does not, adjust AMPLI-
TUDE control of the TS-421(*)/U
until it does.
b. Frequency tuning dial indicates
b.
Set function switch to DISTOR-
TION. Adjust TS-723(*)/U FRE-
between 98 and 102 Hz.
QUENCY tuning and BALANCE
controls to minimum indications
on meter.
a.
a None.
Set function switch to SET LEVEL.
Same as step 1.
Same as step 1.
Tune TS-421(*)/U for output of
200 Hz, as indicated on AN/USM-
207. TS-723(*)/U meter should
indicate 7.75 volts. If it does not
adjust TS-723(*)/U AMPLITUDE
control until it does.
b. Frequency tuning dial indicates
b.
Set function switch to DISTOR-
between 196 and 204 Hz.
TION. Adjust TS-723(*)/U FRE-
QUENCY and BALANCE controls
