Input/Output Interfaces

5.7.4 Audio Specifications

The specifications for the HD Audio subsystem are listed in Table 5-9.

Table 5-9.

HD Audio Subsystem Specifications

Parameter

Measurement

 

 

Sampling Rates (DAC and ADC):

8 kHz to 192 kHz

 

 

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

150K ohms

Line In

150K 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

 

 

Technical Reference Guide

www.hp.com

5-13