Datacom Systems J Class - Manual (Page 32)

1-14
Table 1–1 summarizes the audio electrical specifications for this workstation.
Table 1–1. Audio Electrical Specifications
Frequency Response 25–20,000Hz
Input Sensitivity/Impedance
Line in 2.0Vpk/47kohm
Microphone 22mVpk/1kohm
Line Out 2.8Vpp/47kohm
Headphone 2.75Vpp/50ohm
Speaker (internal) 5.88Vpp/48ohm
Max Output Level/Impedance
Output Impedance
Line Out
Headphone
Speaker
Line In
Microphone
Line Out
Headphone
Speaker
Line In
Microphone
Line Out
Headphone
619ohm
118ohm
Signal to Noise
65dB
61dB
63dB
61dB
57dB
THD (w/nominal load)
–73dB
–70dB
–68dB
–75dB
–73dB
To convert from dB to number of significant bits, use the formula:
n = dB
20 log
10
dB
6
. For example, for 61dB S/N then n= 61/6
significant bits, or in other words, about 6 bits of noise.
~ ~
10
*
*
Keyboard Connectors
PS/2 Keyboard Connectors
The PS/2 connectors provide an interface for the keyboard and mouse
to the system. Consult the documentation that accompanies each input
device for specific information concerning its use.