Apple Workgroup Server 8550 - Manual (Page 105)

Audio system
m Custom sound circuitry, including stereo generator (digital-to-analog
converter, or DAC)—capable of driving stereo miniplug headphones or
audio equipment—and stereo sampling hardware (analog-to-digital
converter, or ADC) for recording stereo sound.
m 16-bit stereo input and output.
m Sample rates of 44.1 and 22.05 kilohertz (kHz).
Typical specifications
m Sound input connector line level: 2.8 volts peak-to-peak (Vpp) nominal,
into 3.0-kilohm (k
Ω) impedance (minimum).
m Sound output connector line level: 2.7 Vpp nominal, into 32-k Ω
impedance.
m Sound input signal-to-noise ratio (SNR): >83 decibels (dB) A-weighted
with no audible discrete tones.
m Sound output SNR: >84 dB A-weighted with no audible discrete tones.
m Bandwidth: 10 Hz to 18 kHz (+0.1 dB, –3.0 dB) at 44.1-kHz sample rate.
The following graphs show typical data for the Workgroup Server 8550. (Your
server’s data may vary, depending on the equipment you have connected.)
0.0
-10.0
-20.0
-30.0
-40.0
-50.0
-60.0
-70.0
-80.0
-90.0
-100.0
-110.0
-120.0
-130.0
10 100 1k
Frequency (Hz)
Signal-to-Noise Ratio
Amplitude (dBr)
ref. to clipping
10k 20k
Digital loop-through
44.1 kHz sample rate
RCA input RCA output
96 Appendix B / Technical Information