Keyboard Connectors; Audio Electrical Specifications - HP Visualize J2240 Service Handbook

Frequency Response
Input Sensitivity/Impedance
Line in
Microphone
Max Output Level/Impedance
Line Out
Headphone
Speaker (internal)
Output Impedence
Line Out
Headphone
Signal to Noise*
Line Out
Headphone
Speaker
Line in
Microphone
THD (w nominal load)
Line Out
Headphone
Speaker
Line in
Microphone
* To convert from dB to number of significant bits use the formula:
n = dB

20 log
10
significant bits, or in other words, about 6 bits of noise.

Keyboard Connectors

PS/2 Keyboard Connectors
The PS/2 connectors provide an interface for the keyboard, mouse, and a variety of
other pointing devices, such as trackballs, to the system. Consult the documentation
that accompanies each input device for specific information concerning its use.
ITF Keyboard Connector
The HP HIL connector provides an interface for the ITF Keyboard to the system.
Consult the documentation that accompanies each input device for specific
information concerning its use.
You can use an HP three-button mouse, a trackball, or other options as pointing
devices with your workstation by using the serial ports or the HIL port. For
Table 1–5.

Audio Electrical Specifications

25–20,000Hz
2.0Vpk/47kohm
22mVpk/1kohm
2.8Vpp/47kohm
2.75Vpp/50ohm
5.88Vpp/48ohm
619ohm
118ohm
65dB
61dB
63dB
61dB
57dB
–73dB
–70dB
–68dB
–75dB
–73dB
dB
.
For example, for 61dB S/N then n= 61/6
6

Product Information
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10
1–15