TB 9-6625-2294-35
10. Timing
a. Performance Check
(1) Press corresponding pushbuttons for indications as listed in (a) through (f) below
.
(a)
VERTICAL MODE CH 1 on.
(b)
VERTICAL MODE CH 2, CH 3, and CH 4 off.
(c)
TRIGGER MODE A to AUTO LVL.
(d)
TRIGGER SOURCE to VERT CH 1.
(e)
Xl0 MAG off.
(f)
20 MHz BW LIMIT off.
(2) Ensure oscilloscope calibrator SOURCE/MEASURE CHAN 1 is connected to
CH 1 using a 50Ω feedthrough termination.
NOTE
Press oscilloscope calibrator CHANNEL pushbutton. Next
press blue soft pushbutton located below CHAN 1 on
oscilloscope calibrator when SELECT CHANNEL is displayed.
(3) Set A SWP SEC/DIV (knob in) switch as listed in first row of table 12.
(4) Set oscilloscope calibrator MARKER output as listed in first row of table 12.
(5) Set CH 1 VOLTS/DIV switch for approximately 2 divisions of display.
(6) Adjust TRIGGER LEVEL control for a stable display.
(7) Adjust horizontal POSITION control to align 2d time marker with 2d vertical
graticule line.
(8) Rotate knob located below FIELD EDIT pushbutton on oscilloscope calibrator to
align 10th time marker with 10th vertical graticule line. If oscilloscope calibrator err
display indication is not within limits listed in first row of table 12, perform b below.
(9) Repeat technique of (3) through (8) above for remaining rows listed in table 12.
If oscilloscope calibrator err display is not within limits listed in table 12, except as noted,
perform b below.
Table 12. CH 1 A SWP Timing
Oscilloscope
calibrator
Oscilloscope
err
calibrator
Test instrument
display limits
A SWP SEC/DIV
MARKER output
(%)
switch settings
settings
5
ns
5 nS/D
1.45
10
ns
10 nS/D
1.45
20
ns
20 nS/D
1.45
