Multiple Local Bus Data Transfers

Note

Additionally, if the transfer configuration involves multiple digitizers, appender digitizer readings will follow the generator digitizer readings. Inserter digitizer readings will precede the generator digitizer readings.

Data in the packed format are left-justified, signed 2’s complement numbers (Figure 3-8). See "Packed Reading Conversions" on page 134 for information on converting the readings to voltages.

During real time data transfers, readings are taken directly from the A/D converter and sent to the Local bus. These readings are also stored in digitizer memory. Transferring (real time or post measurement) readings from memory does not remove the readings from memory. As a result, a set of readings can be transferred over the Local bus multiple times. The digitizer is configured for each additional data transfer with the command:

VINStrument[:CONFigure]:LBUS:MEMory:INITiate

Also, if a measurement is aborted with the ABORt command, the digitizer should be configured with VINStrument[:CONFigure]:LBUS:MEMory:INITiate for each subsequent data transfer.

Detailed information on the digitizers Local bus commands can be found in Chapter 4 - "Command Reference".

164 Understanding the HP E1429 Digitizer

Chapter 3

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HP E1429A manual Multiple Local Bus Data Transfers