HP dc7800 manual Audio Specifications, HD Audio Subsystem Specifications, Adc/Dac

Input/Output Interfaces

5.9.4 Audio Specifications

The specifications for the HD Audio subsystem are listed in Table 5-11.

Table 5-11.
HD Audio Subsystem Specifications
Parameter	Measurement
Sampling Rates:
DAC	44.1-, 48-, 96-, & 192-KHz
ADC	44.1-, 48-, 96-, & 192KHz
Resolution:
DAC	24-bit
ADC	24-bit
Nominal Input Voltage:
Mic In (w/+20 db gain)	.283 Vp-p
Line In	2.83 Vp-p
Subsystem Impedance:
Mic In	20K ohms
Line In	20K ohms
Line Out (minimum expected load)	10K ohms
Headphones Out (minimum expected load)	32 ohms
Signal-to-Noise Ratio
Line out	90 db (nom)
Headphone out	90 db (nom)
Microphone / line in	85 db (nom)
Total Harmonic Distortion (THD)
Line out	-84 db
Headphone out	-80 db
Microphone / line in	-78 db
Max. Subsystem Power Output to 4-ohm Internal	1.5 watts
Speaker (with 10% THD):
Gain Step	1.5 db
Master Volume Range	-58.5 db
Frequency Response:
ADC/DAC	20– 20000 Hz
Internal Speaker	450–20000 Hz

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