Note

The Digitizer Bus Request Level

Bus Request Level Guidelines

Installing the Digitizer

The digitizer’s servant area switches are not used and should be left in their factory-set (0) position.

The bus request level is a priority at which the HP E1429A/B digitizer can request the use of the VME (VXI Data Transfer) Bus.

There are four bus request lines (BG0 - BG3) from which one is selected (Figure 1-2). Bus request line 3 has the highest priority, bus request line 0 has the lowest priority. It is not necessary to change the bus request level setting (BG3) on the digitizer.

More information on the Data Transfer Bus can be found in the C-Size VXIbus Systems “ Installation and Getting Started Guide” .

The HP E1429A/B digitizer can be installed in any mainframe slot except slot 0. However, in applications where the HP E1429B is generating data over the Local bus, install the digitizer in the left slot adjacent to the module(s) receiving the data. Figure 1-3 shows the installation of a sample Local bus configuration.

Figure 1-3. Installing the HP E1429B Digitizer in a Local Bus Configuration

18 Getting Started

Chapter 1

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HP E1429A manual Digitizer Bus Request Level, Installing the Digitizer, Bus Request Level Guidelines