User manual

FFT Analyzer
4-92
AM700 Audio Measurement Set User Manual
The files of multitones that are included in the rom:/mtone directory are those
generated by the Tektronix ASG100 Audio Signal Generator. You can add more
multitone descriptions to the nvram:/mtone directory by creating a file that has the
description of the input multitone signal. Multitone files are described in the Audio
Generator information on page 4-9.
NOTE. When setting up to use multitone test signals, the generator and the multitone
detection must be set to the same multitone signal. If not, the FFT display will show
that a multitone signal is being generated, but the Multitone measurement should
show the message “Waiting for Multitone.” Check that the generator is set to
generate the correct multitone signal in the Generator Control panel Waveform
Control settings, and that the multitone settings in the Configure Measurements
panel for Multitone Settings is set to match the expected signal.
View 1 through View 4 can be set up to provide graphical displays of multitone
measurements. The choices are accessed using the View Setup menus and the
Measurement Setup menus in the Configure Measurement choices (see Figure 4-43).
In the Multitone Measurement mode, there are three multitone measurements
available: Multitone 1, Multitone 2, and Multitone 3. These can be set to make
different multitone measurements. After setting the desired measurements in the
Measurements Setup window, those measurements will be available for selection in
the View Setup choices from within the application or in the Configure View Setup
choices. The possible measurement choices to apply to Multitone 1, 2, and 3 are the
following:
H Level versus frequency
H Level difference versus frequency
H Phase difference versus frequency
H Channel crosstalk versus frequency
H Distortion + Noise versus frequency
Multitone
Mode
Measurements
and Graphical
Displays