Tektronix 1730 Series, Instruction Manual

Page: 129 / 258

1730–Series Checks and Adjustments
5–13
100
80
60
40
20
–20
–40
NTSC
7.5
12.5%
0%
75%
100%
2% & 4% K FACTOR
Tek
Shaded area represents
the distance between 10
m
s
and 110
m
s timing marks.
Figure 5-3: Ten full cycles of calibrator signal between timing marks.
d. CHECK – for 10 full cycles of calibrator signal in the 10 center major
graticule divisions,
±
2% (1 minor division). Adjust the front–panel H
CAL to place the 11
th
falling transition exactly on the 110
m
s graticule
mark (the timing mark on the right side of the graticule).
e. CHECK – that no falling transition between the 10
m
s and the 110
m
s
graticule marks is more than 1% (0.5 minor division) from a major
graticule mark.
f. Select 1 LINE SWEEP (push and hold).
g. Use the HORIZONTAL Position control to place the first calibrator
transition on the 5
m
s graticule mark (left side graticule timing mark).
h. CHECK – for five full cycles of calibrator signal in the center 10 major
graticule divisions,
±
2% (1 minor division).
i. Select 2 LINE SWEEP and turn on the HORIZONTAL MAG.
j. CHECK – for 1 full cycle of calibrator signal in the center 10 divisions
of the graticule,
±
2% (1 minor division).
k. Connect the multiburst output from the television signal generator to the
1730–Series CH–A INPUT. Connect the other side of the loop–through
to the digital counter input.
l. Set the multiburst generator to Low, Continuous, and Manual. Turn
Markers off.