TB 9-6625-2251-24
a. Select CH 1 COUPLING/INVERT and set 50 Ohm to on. Verify DC is set to on.
Adjust CH 1 POSITION control and align cursor on extreme left of crt with center
horizontal graticule line.
b. Select TRIGGER MODE then set AUTO.
c. Rotate CH 1 VOLTS/DIV knob to set CH1 for a 5 mV indication on crt. Adjust
HORIZONTAL A AND B SEC/DIV controls for 5 s indications on crt.
d. Select oscilloscope calibrator SOURCE/MEASURE CHAN 1 output.
amplitude for 6 divisions peak-to-peak signal on TI crt. Adjust TRIGGER LEVEL control
as necessary to obtain a stable display.
f. Adjust LEVEL SINE wave frequency until peak-to-peak signal on TI crt decreases
to 4.2 divisions. Adjust TRIGGER LEVEL control and HORIZONTAL A AND B
SEC/DIV controls as necessary to obtain a stable display. LEVEL SINE frequency will be
150 MHz or greater.
g. Repeat technique of e and f above for settings listed in table 9 below. LEVEL SINE
frequency will be within tolerance listed.
Table 9. Channel 1 Vertical Bandwidth Accuracy
Test instrument
Oscilloscope calibrator
LEVEL SINE
CH1 VOLTS/DIV
LEVEL SINE
frequency tolerance
settings
amplitude settings
( )
5 mV
30 mV
150 MHz
10 mV
60 mV
150 MHz
20 mV
120 mV
150 MHz
50 mV
300 mV
150 MHz
100 mV
600 mV
150 MHz
200 mV
1.2 V
150 MHz
500 mV
3 V
150 MHz
h. Set oscilloscope calibrator to standby. Select VERTICAL MODE. Set CH 1 to off
and set CH 2 to on. Select oscilloscope calibrator CHAN 2 out.
i. Repeat technique of a through f above for CH 2 with settings listed in table 10
below. Leveled sine wave frequency will be within tolerance listed.
Table 10. Channel 2 Vertical Bandwidth Accuracy
Test instrument
Oscilloscope calibrator
LEVEL SINE
LEVEL SINE
CH2 VOLTS/DIV
frequency tolerance
amplitude settings
( )
settings
5
mV
30
mV
150 MHz
10
mV
60
mV
150 MHz
20
mV
120
mV
150 MHz
50
mV
300
mV
150 MHz
100
mV
600
mV
150 MHz
200
mV
1.2
V
150 MHz
500
mV
3
V
150 MHz
8