Commands Listed in Alphabetical Order
GROUPDELAY set
s the SpectralPhase units to groupdelay, which computes the
derivative of unwrapped phase spectrum. Units are expressed in seconds.
Examples
MATH2:SPECT
RAL:PHASE DEGREES
sets the SpectralPhase units for Math 2
waveform to degrees.
MATH2:SPECTRAL:PHASE? might return :MATH2:SPECTRAL:PHASE RADIANS,
indicating that the SpectralPhase units for Math 2 waveform are set to radians.
MATH<x>:SPECTral:REFLevel
This command specifies the vertical position of the specified spectral math
waveform on the display screen. The numerical value represents the position at
the top of the display graticule. The Math waveform is specified by x, which
ranges from 1 through 4. This command is equal to selecting Spectral Setup
from the Math menu, choosing the Mag tab and then entering a value in the
Reference Level box.
Group
Math
Syntax
MATH<x>:SPECTral:REFLevel <NR3>
MATH<x>:SPECTral:REFLevel?
Related Commands
MATH<x>:SPECTral:REFLEVELOffset
Arguments
<NR3> is the value that represents the top of the display screen graticule. The
range depends on the units and both the MATH<x>:VERTical:SCAle and
MATH<x>:VERTical:POSition settings.
Examples
MATH1:SPECTRAL:REFLEVEL -10 sets the top of the display screen to be a
reference level of -10 dB. If the vertical scale is LINEAR, then the vertical units
will be the same as the input waveform.
MATH1:SPECTRAL:REFLEVEL? might return :MATH1:SPECTRAL:REFL EVEL
2.0000E+01
, indicating that the top of the display screen is set to a reference
level of 20 dB.
MATH<x>:SPECTral:REFLEVELOffset
This command sets or returns t he spectral level offset used for calculating the dB
value for the specified math waveform. The Math waveform is specified by x,
which ranges from 1 through 4. Changing the reference level offset causes the
DPO7000, DPO70000/B and DSA7000/B Series Programmer Manual 2-355
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