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Specifications
1–36
AM700 Audio Measurement Set Service Manual
Table 1–23: FFT analyzer (cont.)
Capabilities Description
Multitone
Multitone Record Size 16 Kbytes or less for detecting multitones
Multitone Detection Each channel may be set to recognize one multitone, which can either be
the current tone in one of the generator channels or a multitone described
in a file.
Files are provided in the AM700 file system that contain multitone
specifications for the Tektronix ASG 100/140 audio generators.
Minimum Multitone Detection Level –60 dBu
The minimum detection level is for individual tones that make up the
multitone signal. The generator amplitude readings are 0.707 × peak
voltage, which is RMS voltage for sine waves only. The level of transmitted
multitones depend on the crest factor of the signal, which varies each time
the multitone signal is computed (unless in file mode with absolute phases
provided).
In both file mode and list mode, the amplitude parameters for individual
tones are only used to control the relative amplitude of the tone with
respect to the other tones.
The only way you can determine the received level of each tone is to work
backwards from the peak level of the complex waveform, with knowledge
of the crest factor.
Table 1–24: Audio monitor
Capabilities Description
Human interface
This application has the primary use of verifying the presence of audio and making simple time-domain measurements of the signal
amplitude.
Primary Display Oscilloscope (voltage versus time)
Signal acquisition
Input Channels High Resolution analog inputs
High Bandwidth analog inputs
Digital audio inputs
Inputs from the DSP connector
This application follows the <primary input> global SCPI parameter to
determine which input to display.
Oscilloscope display
This display emulates a traditional digitizing oscilloscope, but with a ‘touch-and-zoom’ touch screen human interface.
Measurement Range Depends on the analog performance and digital input word lengths