User`s guide

Coordinates menu
Coordinates: Auto Real Imag Mag Log dBdBmInten Phs UnwrpPhs Nyquist Nichol Help
Hot Keys: ARI MLDBT PU Y N H
Auto Set the coordinate based upon the data. If the data type is intensity, then Intensity is
chosen. If the data is frequency domain (X-axis units of Hz, RPM, or Orders), then
dB is chosen. If the data is orbit data, then Nyquist is chosen. If the data is
complex, then Mag is chosen. Otherwise, Real is chosen.
Real Show the real part of the data.
Imag Show the imaginary part of the data. If the data is not complex then show zero.
Mag Show the magnitude of the data (always positive).
Log Show the magnitude of the data on a log Y-axis.
dB Show the magnitude of the data in deciBels (10 * log (real^2 + imag^2)).
dBm Show the magnitude of the data in dBm units (power referenced to 1 mWatt). To
set reference impedance, press:
Yscale, Units, dBmReference or dBmType
Inten
Show Intensity, which is the Magnitude of the data in dB units, with the sign
negated if the original real part of the data is negative. If data is set to bars, then
values that have negative real parts are shown with solid bars.
Phs Show the wrapped phase of data. The wrapped phase is shifted to between –180
and +180 degrees. If the data is not complex, the phase shown is 0.
UnwrpPhs Show the unwrapped phase of the data. This is the actual phase referenced to the
first data point.
Nyquist Show Imaginary vs. Real.
Nichol Show dB vs. Phase.
Help Display help information.
Discussion
In both dB and dBm, you can specify a magnitude reference value. To set the user reference, press:
Yscale, Units, UserReference
Viewdata
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