12.
CHECK VERTICAL RISETIME
Remove plug-in extension. Re-install plug-in unit. Remove
grounded emitter transistor board and juniper B to C. Connect
+TRIGGER cable to TRIGGER IN and trigger as above. Turn PULSE
VOLT'S switch and VARIABLE PULSE VOLTS to obtain 2.5 cm of
vertical deflection. Position this signal overlapping the two
center horizontal graticule lines. Turn TIME/CM switch to
.1 M-SEC X5. Measure the distance between where the waveform
intersects these graticule lines and convert to mpsec. This
checks the risetime of the entire system; i.e., pulser, R unit
vertical amplifier and the 5itO-Series oscilloscope,
(Approxi
mately 12 mpsec) Note: For accurate risetime measurements,
check timing on the portion of the sweep used for these
measurements with
50
me sine waves from an accurate source.
13.
CHECK SINGLE AND DOUBLE TRIGGER
Switch TRIGGER to double and observe both leading and falling
portions of the pulser waveform. Note: It may be necessary to
slightly readjust STABILITY and TRIGGERING LEVEL controls to
obtain double triggering.
R-5
January, I
959
