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System Unit Rear Panel Connectors
18
Table 4 summarizes the audio electrical specifications
for the C Class workstations.
Table 4 Audio Electrical Specifications
Frequency Response 25-20,000Hz
Input Sensitivity/Impedance
Line Out 2.0Vpk/47k ohm
Microphone 22mVpk/1k ohm
Max Output Level/Impedance
Line out 2.8Vpp/47k ohm
Headphone 2.75Vpp/50 ohm
Speaker 5.88Vpp/48 ohm
Output Impedance
Line Out 619 ohm
Headphone 118 ohm
Signal to Noise
Line out 65 dB
Headphone 61 dB
Speaker 63 dB
Line in 61 dB
Microphone 57 dB
THD (w nominal load)
Line out -73 dB
Headphone -70 dB
Speaker -68 dB
Line in -75 dB
Microphone -73 dB
To convert from dB to number of significant bits, use
the formula: n=dB/20 log10 = dB/6. For example, for
61dB S/N then n=61/6 10 significant bits, or in other
words, about 6 bits of noise.