5.Aborting the Digitizers. Following interleaved transfers, the Local bus chip of each digitizer is left in an active (running) state. Starting with the leftmost (GENerator) digitizer, it is necessary to ABORt each digitizer before the next use of the Local bus.

6.Reading Sequence and Format. When this program executes, the readings are transferred to the memory card (and later displayed) in the following sequence:

INSerter digitizer channel 2 reading 1 INSerter digitizer channel 1 reading 1 GENerator digitizer channel 2 reading 1 GENerator digitizer channel 1 reading 1

.

.

.

INSerter digitizer channel 2 reading n INSerter digitizer channel 1 reading n GENerator digitizer channel 2 reading n GENerator digitizer channel 1 reading n

The memory card was set up to store the readings in the digitizer’s packed data format. The packed readings are signed, 16-bit numbers preceded by the ANSI/IEEE Standard 488.2-1987 Definite Length Arbitrary Block header. Packed readings are always numbers between -1.0230 (-2046) and +1.0235 (2047). To convert the readings to voltages, each reading is divided by 16 to remove the data label bits (0 - 3), and is multipled by 0.0025 which is the reading resolution for the 5V range (refer to Chapter 3 for more information on data labels and packed reading conversions).

414 Local Bus Interleaved Transfers

Appendix D

Page 414
Image 414
HP E1429A manual Local Bus Interleaved Transfers Appendix D