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Fig, 4-12. Crf display showing correct adjustment of W DTH CAL
control R180.
11. Adjust 100 nS Pulse Width capacitor
C195F
a.
et the Type 114 WIDTH switch t o 100 n , set the PE
RIOD switch to 1 µ S (see Fig. 414).
b.
et the Type 547 TIME/CM (B) to .1 µ EC.
c.
et the Type 1A1 Channel 1 VOLT /CM switch t o 2.
Rotate the Type 114 AMPLITUDE — VARIABLE and the Type
1A1 Channel 1 PO ITION controls lor 5 cm of pulse ampli
tude. Center the pulse vertically on the graticule.
Type 547 TRIGGERING LEVEL control for stable triggering.
d.
et the Type 180A to deliver 10 m c sine-wave output.
e. Use the Type 1A1 Channel 2 PO ITION control to posi
tion the top of the sine waves from the Type 180A to the
graticule centerline.
Fig. 4-14. Control sortings for adjusting l 00 nS Pulse Width capacitor C195F.
Maintenance and Calibration — Type 114
©
Fig. 4-13. location of W DTH CAL control R180
f.
et the WEEP MAGNIFIER control to X5. Use the HORI
ZONTAL PO ITION and TRIGGERING LEVEL controls to
obtain the display shown in Fig. 4-15.
et the
At 100 nanosecond pulse widths, the risetime and
falltime of the pulse becomes a significant portion
of the pulse width, therefore the pulse width meas
urement is made at the 50% amplitude points.
NOTE
4-9
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