Duty Cycle Adjustment
The function generator stores two calibration constants related to
squarewave offset and two calibration constants related to squarewave
duty cycle. The constants are calculated from the adjustment value
entered. The calibration constants are stored following completion of
setup 63. No calibration constants are stored if the procedures are aborted
at any other setup.
1 Use a DMM to measure the function generator dcV output voltage for
each setup in the following table. These adjustments use a HIGH Z
output termination.
For this test, the DMM must be set to a fixed range capable of measuring
from +10 V to -10 V. Do not use an auto-ranging function for this test.
Nominal Output
SETUP FREQUENCY AMPLITUDE
60 — 10.0 Vdc Positive squarewave offset.
61 — -10.0 Vdc Negative squarewave offset.
62 300 Hz 0.0 Vdc 50% duty cycle squarewave.
63 300 Hz 5.0 Vdc 75% duty cycle squarewave
2 Use the CALIBRATE menu to adjust the displayed output voltage at
each setup to match the measured voltage and enter the value.
3 Perform the Squarewave Duty Cycle Verification procedures on page 62.
AC Amplitude Flatness Adjustment
The function generator stores eleven calibration constants related to AC
Amplitude Flatness from 1 kHz to 15 MHz. The constants are calculated
from the adjustment value entered and one of two calculation constants
related to the type of measurement device you are using. The calibration
constants are stored following completion of setup 82. No calibration
constants are stored if the procedures are aborted at any other setup.
4
Chapter 4 Calibration Procedures
Duty Cycle Adjustment
77
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