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VO LT S /D IV
TRIGGER
T IM E /D IV
b. Connect the time mark generator (Type 184) to the
vertical INPUT connector through the 42-inch 50-ohm BNC
cable and a 50-ohm BNC termination.
c. Set the time-mark generator for one-millisecond
markers.
NOTE
Unless otherwise noted, use the middle eight horizon
tal divisions (between second and tenth vertical lines
of the graticule) when checking or adjusting timing.
d. C H EC K -C R T display for one marker oach division
between the second and tenth vertical lines of the graticule.
Tenth marker must be within 0.24 division (within 3%) of
the tenth vertical lino with the second marker positioned
exactly to the second vertical line.
PERFORMANCE CHECK ONLY
Rear-panel operational adjustment; can be adjusted as
part of a performance check.
e. ADJUST SWEEP CAL adjustment, R250 (soe Fig.
5-16), for one marker each division, The second and tenth
markers must coincide exactly with their respective grati
cute lines (reposition the display with the HORIZONTAL
POSITION control if necessary).
f. INTERACTION Check steps29 through 37.
29. Check/Adjust Sweep Length
a.
Move the eleventh marker to the tenth vertical line of
the graticule with the HO RIZO NTAL POSITION control.
Fig. 5 -16. Lo cation o f Sweep Cal adjustm ent (rear panel).
.5
+IN T
1 MSEC
Performance Check/Calibration— Type 310A
b. CHECK—Sweep length between 10.2 and 10.8 divi
sions as shown by 0.2 to 0.8 division of horizontal deflec
tion to the right of the tenth vertical line.
c. ADJUST-Sweep l ength adjustment, R161 (see Fig.
5~ 17), for a sweep length of 10.5 divisions (0.5 division of
deflection to the right of the tenth vertical line).
Fig. 5 -1 7 . Locution o f Swoop Longth adjustm ent (lo ft side I.
30. Check/Adjust Magnifier Registration
a. Set the Horizontal Display switch to X5 MAG.
b. Set the time-mark generator for five millisecond
markers.
c. Position the middle marker (three markers on total
magnified sweep) to the center vertical line.
d. Return the Horizontal Display switch to X I MAG.
e. CHECK-M iddle marker should be within one divi
sion of the center vertical line.
PERFORMANCE CHECK ONLY
Rear panel operational adjustment; can be adjusted as
part of a performance check.
f. A D JU ST-M A G CENTER adjustment, R215 (see Fig.
5-16), to position the middle marker to the center vertical
line.
31. Check Variable Time/Division Control Range
a. Set the time-mark generator for 10-millisecond
markers.
b. Position the markers to the far left and right vertical
lines of the graticule with the H ORIZONTAL POSITION
control.
c. Turn the Variable T IM E /D IV control fully counter
clockwise.
5-21
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