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Specifications
AM700 Audio Measurement Set Service Manual
1–35
Table 1–23: FFT analyzer (cont.)
Capabilities Description
Amplitude Related Characteristics
High Bandwidth Mode
>400 Hz <–120 dBu
Residual DC Response <–60 dBFS within two hours of offset calibration
FFT dynamic range
Spurious Free Dynamic Range >105 dB
Phase
FFT Cross-Channel Phase Accuracy ±1 degree
Display related characteristics
Displays Available Spectral Display (amplitude versus frequency for A and B)
Spectrogram (time versus frequency with amplitude color/gray coded)
Display Update Rate >10 updates per second at full span
Frequency Axis Linear or Log
Averaging
Displays The following average displays are available:
Max Hold
Min Hold
Average
Type of Averaging Exponential only
Cursor functions
Number of Cursors One or Two
Cursor Modes The following cursor modes are provided:
Continuously displayed amplitude and frequency at each cursor
Peak locator function
Multitone
Multitone analyzer is a measurement that may be run in the FFT application. When the user turns on the multitone analysis mode, the
AM700 starts looking for a multitone signal. When it detects the specified multitone, it starts making the user-selected measurements,
as long as the multitone is present.
Multitone Measurements The following measurements may be made in Multitone analysis:
1. Level versus frequency: A, B
2. Stereo interchannel level difference
3. Stereo interchannel phase difference
4. Stereo crosstalk versus frequency
5. Distortion + Noise (with FFT-like display)
Multitone Graphical Displays Graphical display will be available for each of the multitone measurements.