Tektronix VM700T User Manual page 21

Getting Started
1–6
Editing an Audio Limit Text Parameter. Change any audio limit text parameter
using the following procedure:
1. Rotate the knob to highlight the line containing the parameter you wish to
change. This includes the title line in the configuration file. Use a descriptive
file name for help in identifying it later.
2. Select the parameter you want to change by touching it.
3. Rotate the knob to increase or decrease the parameter value.
4. Touch the
NOTE. If you change a parameter and then decide you don't want to keep the
change, press the
want to exit without changing anything by asking you to touch the
soft key again.
To return to the file you created, touch the soft key on the display (the file you
created now appears there).
If you are making extensive changes to the file, you can avoid losing all your
changes by pressing the
re-entering the file. That way, if you make a mistake and must exit the file, your
earlier work will be retained while the most recent change (or mistake) is
eliminated.
Editing an Audio Limit Graphic Element. The VM700T audio limit files contain
graphical displays whose limits can be configured. These include the following
graphical displays:
Amplitude response versus frequency characteristic
the Audio Analyzer and View Audio Autotest measurement displays.
Crosstalk plus Noise – these limits are used in the View Audio Auto
measurements display.
Total harmonic distortion (THD+N) – these limits are used in the Audio
Analyzer measurement display. There are three ranges to make selections
for: limits for stimulus up to TEST +9 dB, stimulus from TEST +10 dB to
TEST +14 dB, and stimulus greater than TEST +14 dB.
Stereo phase difference – these limits are used in the Audio Analyzer and
View Audio Autotest measurement displays.
Stereo gain difference – these limits are used in the Audio Analyzer and
View Audio Autotest measurement displays.
Channel separation – these limits are used in the Audio Analyzer measure-
ment display.
VM700T Option 40/41/42 Audio Measurements User Manual
soft key to accept the change.
soft key. The VM700T verifies that you
soft key after each change and then
these limits are used in
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