R&S ZNB Series User Manual page 346

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R&S ZNB/ZNBT
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"Operands" contains all data traces and memory traces of the active recall set.
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The trace operands denote unmodified data and memory traces. Trace math and
other trace functions ("Smoothing", "Hold", "Shift Trace" etc.) are not taken into
account.
Table 5-2: Effect of the operators on a complex quantity z = x + jy.
+, -, *, /
()
Lin Mag
dB Mag
round
x y
Arg
Re, Im
log, ln
Min, Max
StimVal *)
tan, atan, sin, asin, cos, acos
*) The operand "StimVal" can be used for all sweep types. Please note that – as with
all user math operands – only the numerical value without unit is processed in the user
math formula.
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In frequency sweeps "StimVal" provides the stimulus frequency in Hz.
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In power sweeps, "StimVal" provides the voltage in V that results from the source
power in dBm. To obtain the correct source power in dBm (for "dB Mag" trace for-
mat),
into a dBm value, the source power depends on the reference impedance of the
port associated with the measured wave quantity, to be set in the "Balanced Ports"
dialog.
User Manual 1173.9163.02 ─ 62
The effect of the basic arithmetic operators (/, *, –, +) and the mathematical
functions is described in
Products of numbers and constants may be entered in abbreviated form, e.g.
2e for 2*e.
The Clear, Del, Back buttons are used to correct faulty entries.
Check performs a consistency check of the displayed mathematical expression
and displays a message.
Data and memory traces are identified by their trace names.
"Data" denotes the active data trace.
"Mem" is the memory trace associated with the active data trace (or the first
created one, if several memory traces are associated with the active data
trace).
"StimVal" is the array of stimulus values; see footnote for
Result is Wave Quantity
Table 5-2.
Basic arithmetic operations
Grouping parts of an expression
|z| = sqrt ( x 2 + y 2 )
dB Mag(z) = 20 * log|z| dB
x real ⇒ round(x) rounds x to the closest integer (away from zero for
ties)
x,y real ⇒ round(x+yj) = round(x)+round(y)j
Exponential, e.g. z 2
Phase φ (z) = arctan ( Im(z) / Re(z) )
x, y (Real and Imag)
Common (base 10) or natural (base e) logarithm
Smaller or larger values of all points of two traces, e.g.
Min(Trc1,Trc2)
Stimulus value*)
Direct and inverse trigonometric functions.
must be enabled. Note that, due to the conversion
GUI reference
Trace Config softtool
Table 5-2.
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