TB 9-6625-2274-40
Table 4. Variable Amplitude Calibrator
Test instrument
VAR dial display
Multimeter indications
settings
(V dc)
(%)
Min
Max
9.9 LOW
11.0711
11.1265
5.0 HIGH
9.5000
9.5476
9.9 HIGH
9.0764
9.1219
(11) Connect TI OUTPUT to digitizing oscilloscope INPUT/TDR OUTPUT.
Connect TRIGGER OUTPUT to digitizing oscilloscope TRIG.
(12) Position controls as listed in (a) through (i) below:
(a) Press AMPLITUDE MODE AMPL MODE VOLT pushbutton.
(b) Press AMPLITUDE MODE FREQ
pushbutton to highlight 10 kHz.
p
(c) Press AMPLITUDE MODE NUMBER OF DIV (MULTIPLIER)
ushbutton to display X 1 DIV.
(d) Press VARIABLE ON pushbutton off.
(e) Adjust UNITS/DIV dial to display .2 VD.
(f) Press OUTPUT USE FOR 5O LOAD pushbutton on.
(g) Press TRIGGER ON pushbutton on.
(h) Press TRIGGER NORM pushbutton.
(i) Press OUTPUT ON pushbutton on.
(13) Acquire signal using digitizing oscilloscope and adjust sensitivity to 1 mV/D.
Adjust digitizing oscilloscope offset to position top of square wave exactly on center
horizontal graticule.
(14) Disconnect digitizing oscilloscope TRIG input. Connect leveled sine wave
generator AMPLITUDE LEVELING HEAD to digitizing oscilloscope TRIG.
pushbutton to highlight +DC.
(15) Press AMPLITUDE MODE FREQ
(16) Set leveled sine wave generator for an output of 1 V, 10 kHz.
(17) Digitizing oscilloscope will display a signal indicating within .5 major division
of center horizontal graticule.
(18) Press OUTPUT ON pushbutton off and disconnect equipment setup.
b. Adjustments. See paragraph 6 d above.
9. Current Amplitude Mode
a. Performance Check
(1) Connect TI OUTPUT to multimeter current input. Set multimeter to measure
autorange DCA.
.
(2) Press pushbuttons as listed in (a) through (d) below:
AMPLITUDE MODE AMPL MODE CURRENT.
(a)
to highlight +DC.
AMPLITUDE MODE FREQ
(b)
VARIABLE ON off.
(c)
OUTPUT ON on.
(d)
