Antex electronic SX-5e, SX-6, SX-34, SX-36 user manual Digital-to-Analog

Page 62

Digital-to-analog conversion (used in playback) is the exact oppo- site of the analog-to digital conversion process and is illustrated in Figure 21.

In digital-to-analog conversion, the PCM bitstream is converted at the sampling frequency to a continuously changing series of quantization levels which are individual "steps" of discrete voltage equal to the quantization levels in the analog-to-digital process. The shape of this continuously changing stream of quantization levels approximates the shape of the original wave. This is shown in the top half of Figure 21. This signal is then passed through a low-pass filter, which removes the digital "switching noise." The end result, shown in the bottom half of Figure 21 is an analog out- put signal whose waveshape is a very close approximation of the original analog input signal.

Figure 21. Digital-to-Analog

57

Image 62
Contents Th Street September 17 Rev. EAntex Electronics Corporation GARDENA, CaliforniaDeclaration of Conformity Table of Contents SX-34 Mixer and Block Diagram SX-6 Mixer and Block Diagram Figures Card Installation IntroductionJumper Settings & Connections SX-5e,6,34,35 & SX-36 Jumper SettingsAddresses and Interrupts Making Connections to the CardPage SX-35/36 Connector Description SX-35/36 ConnectionsLine I/0 JP8 AUX in JP9 MIC JP7SX-34 Connector Description Output Header JP5AUX Header JP6 Microphone Header JP7Mono Header JP4 SX-6 Connector Description SX-6 ConnectionsLine OUT JP2 Microphone Input JP3SX-5e Connector Description Balanced and Unbalanced SignalsImpedance and Signal Levels Playback and Record Devices COMPRESSION, Data RATES, and Networks ISO/MPEG-1 Bitrates 32 KHz 44.1 KHz 48 KHz Driver Installation Windows Setup Tips Upgrade Driver, WINSetup Tips Upgrade Driver, WIN Windows NT Antex Application Software Installation Using Windows Demonstration Software Sample RateCompression Mpeg BitratesWave Device ChannelsVU Meters File Record/StopDual Device Operation VolumeInstalling and Using Multiple Cards in a System Mixer and Block Diagrams SX-36 Mixer and Block Diagram Page Page SX-36 Mixer SX-36 Block Diagram SX-34 Mixer and Block Diagram SX-34 MixerSX-34 Block Diagram SX-6 Mixer and Block Diagram SX-6 Mixer SX-6 Block Diagram SX-5e Mixer and Block Diagram SX-5e MixerPage SX-5e Block Diagram Antex Meter Antex MeterAntex Meter pull-down menu Antex Meter options Page Troubleshooting Files I record sound dull Files recorded are of poor quality There are dropouts or pops and clicksTECHNICAL/ORDERING Information Toll Free 800 Phone 310 FAX 310Terms Connectors for Male HeadersAppendix Page SX-36 SpecificationsAll Cards as applicable SX-34 SX-6SX-5e About Digital AudioPage Analog-to-Digital Digital-to-Analog