HP B180L User Manual
Page 31
17
System Overview
System Unit Rear Panel Connectors
*To convert from dB to number of significant bits, use the formula:
For example, for 61dB S/N then n=61/6 or approx. 10 significant bits, or in other
words, about 6 bits of noise.
Keyboard Connectors
PS/2 Keyboard and Mouse Connectors
The PS/2 connectors provide an interface for a keyboard and a mouse to the
system. Consult the documentation that accompanies each input device for
specific information concerning its use.
HP Parallel I/O Connector
The 25-pin HP Parallel I/O interface uses Centronics interface protocols to
support peripheral devices such as printers and plotters. Consult the docu-
mentation that accompanies each peripheral device for specific information
concerning its use.
802.3 Network Connectors
Your workstation has built-in LAN-AUI and LAN-TP (Twisted Pair) con-
nectors for the 802.3 (ETHERNET) network. Connections to ThinLAN net-
works require an external transceiver. Your workstation will autoselect the
correct network setting. The Models
B132L+/
B180L allow you to also manu-
ally select your LAN configuration.
NOTE:
Only one of the network connectors can be used at one time.
Microphone
-73 dB
Table 1
Audio Electrical Specifications
n
dB
20
10
log
[
]
---------------------------
dB
6
-------
≈
=