
4-9
Connecting Cables
Audio Connection
Audio Connection
Model 743 Board Computers provide compact disc-quality audio input and
output in stereo with a 16-bit coder-decoder (CODEC) over a frequency
range of 25-20,000 Hz. Output is provided by a small internal speaker and a
stereo headphone mini-plug (8 ohms impedance). Input is provided by a ste-
reo line-in and mono microphone mini-plugs.
The CODEC combines CD quality stereo A/D converters for microphone
and line input levels. D/A converters for driving headset and line outputs are
used. The input sampling rate and format are programmable, as are the input
gain control (used for software control of recording levels) and output atten-
uation.
A
1
/
8
-inch mini-jack is used for the speaker out connection. The other audio
signals are on a 9-pin micro D-sub connector. The output is capable of driv-
ing 8 ohms; it can also be used for higher impedance devices with little or no
additional distortion. A line-level input can be driven by the headset output.
Summary of Contents for Model 743 PC
Page 1: ...Model 743 Owner s Guide HP Part No A2636 90606 Edition E1097 Printed in U S A ...
Page 11: ...Preface 1 Preface ...
Page 19: ...Preface 9 Declaration of Conformity ...
Page 20: ...Preface 10 ...
Page 21: ...1 1 1 Model 743 Board Computer Overview ...
Page 39: ...2 1 2 Accessories Installation ...
Page 47: ...2 9 Accessories Installation GSC Expansion Kit Figure 2 3 Adding the Front Panel Screws ...
Page 65: ...3 1 3 Typical Installation in a VME Card Cage ...
Page 75: ...4 1 4 Connecting Cables ...
Page 98: ...4 24 Connecting Cables SCSI Connection ...
Page 99: ...5 1 5 Powering On and Off ...
Page 105: ...6 1 6 Solving Problems ...
Page 111: ...A 1 A The Boot Console Interface ...