Lambda SR1, Operation Manual, Page: 72 / 317

SR1 Operation Manual 72
© 2014 Stanford Research Systems
IMD tab for DIM selection
In all cases the Total Amplitude control sets the combined amplitude of all signals.
The IMD waveform is designed to be used with the IMD analyzer. The analyzer automatically determines
the type of IMD signal is being generated and automatically configures itself for the correct analysis. See
the
IMD Analyzer section for more details.
Polarity Check Waveform
The polarity check waveform uses a phased combination of two sine waves to produce a deliberately
asymmetric waveform that points "up". When this waveform is applied to a device under test it is easy to
see if the device properly maintains or inverts polarity by checking the output waveform using the time
record of the
FFT Analyzer . If the output waveform still points "up" the device maintains polarity. If the
waveform points "down" the device is inverting.
Polarity Waveform Non-Inverted ...And Inverted