TB 9-6625-2024-35
division from center horizontal graticule line, adjust R248 X10 BAL (fig. 3) for minimum
shift while MAG pushbutton is moved between X1 and X10.
16. Amplifier Gain and Attenuation
a. Performance Check
(1) Connect oscilloscope calibrator SOURCE/MEASURE CHAN 1 to TI INPUT.
(2) Set MAG switch to X1.
(3) Set oscilloscope calibrator VOLTAGE output to 50 mV and output frequency
to 1 kHz.
(4) Adjust GAIN control (front panel) for 5 divisions of vertical deflection on
oscilloscope crt.
(5) Set oscilloscope calibrator VOLTAGE output for 5 mV.
(6) Set MAG switch to X10.
(7) Rotate oscilloscope calibrator knob located below EDIT FIELD pushbutton
for 5 divisions of vertical deflection on oscilloscope crt. If oscilloscope calibrator err
display readout does not indicate within 10%, perform b below.
(8) Set MAG switch to X1.
(9) Repeat technique of (7) above at settings and oscilloscope vertical deflection
listed in table 5. Oscilloscope calibrator err display readout will indicate within 2% at
each setting.
Oscilloscope
Oscilloscope
Test instrument
Oscilloscope
vertical
calibrator err
VOLTS/DIV
calibrator voltage
deflection
display limits
%
switch settings
output
(divisions)
5 mV
20 mV
4
2
20 mV
.1 V
5
2
50 mV
.2 V
4
2
.1 V
.5 V
5
2
.2 V
1V
5
2
.5 V
2V
4
2
1V
5V
5
2
2V
10 V
5
2
5V
20 V
4
2
10 V
20 V 1
4
2
1Set
MULTIPLIER to X2.
b. Adjustments
(1) Rotate oscilloscope calibrator knob located below EDIT FIELD pushbutton
for an indication of 0.0% on err display.
