User manual

Appendix A: Specifications
AM700 Audio Measurement Set User Manual
A-35
Table A-19: Generator Control
Capabilities Description
Generator Capabilities The analog and digital generators calculate
signals in real time. The analog signals are
derived digitally, providing a great deal of flexi-
bility, but the output signals are restricted to those
that can be realized with digital-to-analog
converters and standardized sampling rates.
Sine wave test signals may be swept in amplitude
and frequency. The test signals may also be
driven from a sequence within the capability of
SCPI lists. More complicated modes may be
created using the AM700 function capability as
required by the user.
There are some differences in the signal set and
specifications between analog and digital genera-
tors, and the analog generator capabilities differ
between high bandwidth and high resolution.
Analog Signal Generation Several predefined signals or arbitrary user-
defined signals are selectable.
Mono and Stereo Signals Monophonic and stereophonic test signals.
Each channel of a stereo pair is treated as a sep-
arate entity in SCPI and the AM700. This permits
a great deal of flexibility in providing test signals
to the outputs of the AM700. It is possible, for ex-
ample, to have completely separate signals and
sweeps at the A and B outputs.
The same signal may be applied to both channel
outputs. This mode is often needed for testing
with the AM700. From a remote controller the
SOURce:FOLLow command causes one channel
to track the other.
The high bandwidth generator outputs only
monophonic signals (the same signal is on both A
and B outputs).
User-Defined Signals User-defined signals may be generated.
User-defined signals may be loaded to the
AM700 from a file in the internal file system or
from a DOS formatted 1.44 Mbyte diskette.