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AM700 Audio Measurement Set Service Manual
Table 1–19: Remote control protocol
Capabilities Description
Remote Control Protocol SCPI (Standard Commands for Programmable Instruments) 1994
External Keyboard
Keyboard Operation The external keyboard is used to enter text and numbers into those
portions of the user interface that accept such input. The front-panel
keypad may also be used for numeric entry. In the absence of an external
keyboard, a keyboard that is operated using the touch-screen interface
appears on the AM700 display when character input is permitted.
Table 1–20: 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 flexibility, 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 generators, and the analog generator capabilities differ
between high bandwidth and high resolution.
Analog Signal Generation Several predefined signals or arbitrary user-defined signals.
Mono and Stereo Signals Monophonic and stereophonic test signals.
Each channel of a stereo pair is treated as a separate 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 example, 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 on both the A output and the B output).
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.