HP E1429A manual Setting the Local Bus Data Source

Models: E1429A

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Setting the Local Bus Data Source

The source of the readings transferred over the Local bus is set with the command:

VINStrument[:CONFigure]:LBUS:FEED <source >

The <source > parameters follow. Sources beginning with "MEMory: " are the post measurement sources, sources beginning with "CONVerter:" are the real time (A/D) sources. The Local bus data source is independent of any Local bus transfer mode.

"MEMory:CHANnel1" : Channel 1 memory is the data source for the Local bus. Two bytes per reading will be output to the bus.

"MEMory:CHANnel2" : Channel 2 memory is the data source for the Local bus. Two bytes per reading will be output to the bus.

"MEMory:BOTH" : Both channels of memory are the data source for the Local bus. In this mode, the channel 2 reading is output first, followed by the channel 1 reading. With two bytes per reading, four bytes for each set of readings will be output to the bus.

"CONVerter:CHANnel1" : The channel 1 A/D converter is the data source for the Local bus. Two bytes per reading will be output to the bus.

"CONVerter:CHANnel2" : The channel 2 A/D converter is the data source for the Local bus. Two bytes per reading will be output to the bus.

"CONVerter:BOTH" : Both A/D converters are the data source for the Local bus. In this mode, the channel 2 reading is output first, followed by the channel 1 reading. With two bytes per reading, four bytes for each set of readings will be output to the bus.

Local Bus Data Format Data is transferred (real time or post measurement) over the Local bus in the digitizer’s packed (A/D) format. Data is transferred one byte at a time in the following sequence:

Two Channels: channel 2 MSByte channel 2 LSByte channel 1 MSByte channel 1 LSByte

One Channel: channel n MSByte channel n LSByte

Chapter 3

Understanding the HP E1429 Digitizer 163

Page 163
Image 163
HP E1429A manual Setting the Local Bus Data Source