Tektronix 1740A Series, User Manual

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Performance Verification
1740A/1750A/1760 – Series Service Manual
4–15
h. Enter the CONFIG menu and select CAL SIG OFF. Exit the CONFIG
menu.
i. Connect the output of the Multiburst generator to the digital counter. Set
the Multiburst generator to Low, Continuous, Manual, and turn the
Markers Off. Adjust the Multiburst frequency to 5.0 MHz.
j. Replace the color bar signal on the CH-A INPUT with the multiburst
signal. Leave the loop-through connector terminated.
k. Turn on the MAG SWEEP.
l. Set the Multiburst generator to Composite.
m. Check – for one cycle per division 0.5 minor division.
n. Turn off the MAG SWEEP.
8. Sweep Length
Requirement – Sweep Length: 12 divisions 0.5 minor division.
a. Replace the multiburst signal on the CH-A INPUT with the color bar
signal. Leave the loop-through connector terminated.
b. Select 1 FIELD SWEEP.
c. Check – for 12 divisions of signal 0.5 minor division.
d. Select 2 FIELD SWEEP.
e. Check – for 12 divisions of signal 0.5 minor division.
f. Select 2 LINE SWEEP (10
m
s/div).
9. Vertical Gain, Calibrator Amplitude, and Variable Gain Range
Requirement – 1 Volt Full Scale (X1): 1 V input displayed within 1% of
140 IRE (1.00 V PAL) graticule. X5 Gain: 0.2 V input displayed within 1%
of 140 IRE (1.00 V PAL) graticule. X10 Gain: 0.1 V input displayed within
1% of 140 IRE (1.00 V PAL) graticule. Calibrator Amplitude: Square Wave:
140 IRE (1.0 V PAL)
0.5%; Sine Wave: 140 IRE (1.0 V PAL) 1%.
Variable Gain Range: 0.2X to 1.4X.
a. Replace the color bar signal on the CH-A INPUT with the output from
the VAC. Remove the loop-through terminator. Set the VAC amplitude
to 999.9 mV, and LUM.
b. Select EXT REF.
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