User manual

Appendix A: Specifications
A-2
AM700 Audio Measurement Set User Manual
Table A-1: Analog Analyzer Specifications (Cont.)
Capabilities Description
Input Characteristics
Full Scale Input Ranges From –22 dBu (62.5 mV
RMS
) to +44 dBu
(125 V
RMS
) in 12 6-dB steps
Input gain ranges are in 6 dB steps from –22 dBu
to +8 dBu and in 12 dB attenuator steps (with in-
termediate 6 dB gain steps) from +8 dBu to
+44 dBu.
Autoranging may be selected to switch the gain
appropriately on the level of the input signal.
Auto Ranging Input level sensing circuitry exists which allows
software control of the input gain and attenuation,
automatically selecting the optimum dynamic
range for the current input level.
Minimum Input for 1 dB Accuracy 1 mV (–57.8 dBu) (–36 dB on 62.5 mV scale) in
“high resolution mode ”
Maximum Resolution 96 dB below 62.5 mV = 0.9875 µ V
Maximum Useable Bandwidth
High Bandwidth Mode
High Resolution Mode
80 kHz
24 kHz
Common-Mode Rejection
At 50 or 60 Hz
At 1 kHz
At 10 kHz
At 20 kHz
50 dB
50 dB. Typically 80 dB on +8 dBu scale, 60 dB
on +14 dBu and up, and typically > 80 dB on less
than +8 dBu scale
45 dB. Typically 80 dB on +8 dBu scale, 45 dB
on +14 dBu and up, and typically > 80 dB on less
than +8 dBu scale
40 dB. Typically 80 dB on +8 dBu scale, 45 dB
on +14 dBu and up, and typically  80 dB on
less than +8 dBu scale
Isolation, Generator to Analog Acquisition
Load R = 200 kΩ Load R = 600 Ω
10 Hz to 1 kHz
1 kHz to 80 kHz
90 dB 140 dB
80 dB 100 dB