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Specifications
1–8
AM700 Audio Measurement Set Service Manual
Table 1–2: Analog analyzer specifications (cont.)
Capabilities Description
Amplitude measurement
High Bandwidth Mode 10 Hz to 20 kHz 20 to 70 kHz 70 to 80 kHz
At +8 dBu FS ±0.2 dB
(Typically ±0.05 dB from
50 Hz to 10 kHz
±0.35 dB ±1.0 dB
At other gain steps FS ≥62.5 mV (–22 dBu) ±0.25 dB ±0.35 dB ±1.0 dB
The accuracy of the measurement may be noise-limited for
amplitudes below 62.5 mV (–22 dBu).
Interchannel Phase Difference
High Resolution Mode ±1 degree from 100 Hz to 20 kHz
ADC Sampling Rate
High Resolution Mode 6.144 MHz, decimated to 48 kHz (two channels, 64 times oversampling on
each channel)
High Bandwidth Mode 192 kHz
THD + N measurement
High Bandwidth Mode Residual THD + N
THD + N measured using the high bandwidth ADC over
an 80 kHz BW. The measurement is noise-limited for
amplitudes below 125 mV (–16 dBu).
Input > 125 mV (–16 dBu);
frequency ≤20 kHz to ≥72 Hz.
Typically ≤0.03%, maximum 0.05%.
High Resolution Mode Residual THD + N
Measurement bandwidth = 20 kHz
Input Amplitude > 62.5 mV (≈–21.9 dBu) ≤0.015%, noise-limited for amplitudes <250 mV (≈–10 dBu)
Input Amplitude Between 250 mV (≈–10 dBu) and
16 V (≈+26 dBu) and frequencies between 20 Hz
and 6.6 kHz
On +2, +8, +14, +20, and +26 dBu
Input Ranges
At Full Scale
At Full Scale –6 dB
400 Hz to 6.6 kHz ≤0.003%,
typ. ≤0.0015%
≤0.003%,
typ. ≤0.002%
100 Hz to <400 Hz ≤0.005%,
typ. ≤0.0025%
≤0.003%
typ. ≤0.0025%
20 Hz to <100 Hz ≤0.011% ≤0.005%,
typ.≤0.003% at 20 Hz