Lambda SR1, Operation Manual, Page: 54 / 317

SR1 Operation Manual 54
© 2014 Stanford Research Systems
MultiTone*
Like FFT Chirp, the MultiTone Waveform is a special waveform containing a series of tones that are
generated in synchronous fashion to ensure bin-center placement in the
MultiTone Analyzer . Using the
MultiTone generator and analyzer many different characteristics of a device—noise, distortion, frequency
response, can be measured quickly and simultaneously without the need for multiple swept
measurements.
All of the details of the multitone waveform— tone frequency and amplitude, phase, etc. are configured
using the
MultiTone Configuration Panel . As a result, only the amplitude is specified on the waveform
tab. The Export button allows the current multitone waveform to be saved in arbitrary waveform format for
off-line analysis. Because of the special properties of the MultiTone waveform it may not be combined
with other waveforms. The Multitone waveform cannot be selected from the analog generator panel
unless the MultiTone configuration panel specifies the use of the analog generator.
The MultiTone waveform outputs a generator trigger once each cycle. When performing
multitone analysis with the local SR1 generator be sure to use generator trigger as the
analyzer trigger source to ensure proper phase calibration.
IMD Waveform*
IMD Tab for SMPTE/DIN And for CCIF
The IMD Waveform can be configured to output the three classic audio IMD test signals— SMPTE,
CCIF, and DIM.