Table of Contents
Advertisement
Using an Embedded
Controller
Setting the AFG
Servant Area
Chapter 1
As a message-based device, the Agilent E1445A can easily be programmed
across the VXIbus backplane from an embedded controller. The select code
of the VXI interface board in embedded controllers is typically 16. Since no
secondary GPIB address is required when programming over the backplane,
the logical address of the Agilent E1445A is combined with the VXI
interface select code.
For example, to send commands to the AFG with logical address 80, the
OUTPUT
statement in an BASIC program appears as:
OUTPUT 1680;"SOUR:ROSC:SOUR INT1;:TRIG:STAR:SOUR INT1"
(for device logical addresses from 01 to 99)
OUTPUT 160xxx;"SOUR:ROSC:SOUR INT1;:TRIG:STAR:SOUR INT1"
(for device logical addresses from 100 to 255)
The Agilent E1445A servant area is set when the Agilent E1446A Summing
Amplifier/DAC is used with the Arbitrary Function Generator. Note the
following when setting the AFG servant area:
The Agilent E1445A servant area need only be set when the
Agilent E1446A Summing Amplifier/DAC is used with the AFG
(factory setting = 0).
The Agilent E1446A must be in the AFG servant area in order for
the AFG to control the Summing Amplifier/DAC.
The Agilent E1445A servant area is defined as:
Servant area = (logical address + 1) through
(logical address + servant area switch setting).
The Agilent E1446A Summing Amplifier/DAC should be the only
device in the AFG servant area. Other devices in the servant area
would be inaccessible to other commanders (Agilent E1406A
Command Module, for example).
The Agilent E1445A AFG servant area switch is shown in Figure 1-2.
or
Getting Started
23
Advertisement
Table of Contents
