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3.0 Audio input and output
The chapter discusses ACU2 (v2) audio input and output specifications.
3.1 Audio input
Table 7, "Audio input characteristics" below shows ACU2 (v2) audio input characteristics
and values:
Input Impedance 830 ohms single-ended (1.6K ohms differential)
Input Level 6.5 V
pp
single ended (6.5 V
pp
differential)
Input Gain -8 dB, +2 dB to +57 dB; default value of 40 dB; software configurable
Note : The ACU2 (v2) gain covers a total range of 65 dB. B2 dB and
+57 dB, the gain can be set in 1 dB steps. A value of -8 dB is available for input
signals greater than line level. The range -8 dB to +2 dB cannot be selected as
a function of design.
Microphone Power +12 VDC; off by default; software-enabled
Frequency
Response 20 Hz to 20 kHz, +/- 1.5 dB
Table 7: Audio input characteristics
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ACU2 (v2) Technical User Guide (Rev. A, Ver. 0)