National Instruments 321042A-01 Manual De Usuario

1.

Choose a new DMA channel setting.

You can use channel 5 or 6.  If you are installing more than one STD-GPIB, each
module must either use a unique DMA channel or must not use DMA at all.

2.

Locate the jumpers at W3 that select the DMA channel.  Refer to the parts locator
diagram, Figure 2-3.

3.

Change the jumper settings to configure the STD-GPIB to the new DMA channel.
To select a new DMA channel, you must set both the DMA Acknowledge and DMA
Request lines, as shown in Table 2-3.

Table 2-3.  DMA Channels

5

DACK5

DRQ5

6

DACK6

DRQ6

Figure 2-8 shows the jumper position for selecting DMA channel 6.

DRQ 6

W3

DACK 6

DACK 5

DRQ 5

Figure 2-8.  DMA Channel Jumper Setting for DMA Channel 6

4.

Record your new setting on the STD -GPIB  Hardware and Software Configuration
Form in Appendix C, Customer Communication.

5.

Remember that after you install the NI-488.2 software, you must use the GPIB
software configuration utility to configure your software setting to match your new
hardware settings.  Refer to the Configure the Software  section in Chapter 3,
Software Installation and Configuration , for more information.