Tektronix 1730 Series, Instruction Manual

Page: 128 / 258

1730–Series Checks and Adjustments
5–12
5. Sweep Operation
REQUIREMENT – Check that the correct sweep rate can be selected. Check
that some part of the blanking interval is displayed when magnifying the
centered 2LINE and 2FLD sweeps.
a. Display INPUT A with nothing connected.
b. CHECK – that a sweep occurs at each SWEEP rate (2LINE, 2FLD, and
1LINE).
c. Select CH–B INPUT.
d. CHECK – that the 1LINE and 2LINE SWEEP modes display one line
and two lines of the color bar, respectively.
e. CHECK – for a 2FLD SWEEP display of the color bar signal.
f. Select and center the 2FLD SWEEP, then push the MAG button.
g. CHECK – that some portion of the vertical (field) blanking interval is
displayed.
h. Select and center the 2LINE SWEEP, then push the MAG button.
i. CHECK – that some portion of the horizontal (line) blanking interval is
displayed.
j. CHECK – that both lines of the 2LINE MAG SWEEP can be posi-
tioned onto the display with the HORIZONTAL Position control.
6. Check Sweep Calibration
REQUIREMENT – Timing accuracy: For 10
m
s/div. (2 LINE), 5
m
s/div. (1
LINE), and 1
m
s/div. (2 LINE+MAG):
±
2%. For 0.2
m
s/div. (1 LINE+MAG):
±
3%. Linearity:
±
1%.
a. Hold the 1730–Series REF button in until the calibrator signal is
displayed.
b. Turn off the HORIZONTAL MAG and select 2 LINE.
c. Use the HORIZONTAL Position control to place the first falling
calibrator transition on the 10
m
s graticule mark (the timing mark on the
left side of the graticule that goes completely through the blanking line).
See Fig. 5-3.