R&S ZNC3, Руководство пользователя

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GUI Reference
R&S
®
ZNC
217 User Manual 1173.9557.02 ─ 13
Factor / On / Reset
"Factor" defines the number of averaged traces, "On" enables or disables the sweep
average, "Reset" starts a new average cycle. The average cycle is also re-started when
the "Mode" is changed.
Calculation of the average trace
Let c be the average factor and assume that n sweeps have been measured since the
start of the average cycle (start of the measurement or "Reset"). The following two sit-
uations are distinguished:
●
n
≤
c: At each sweep point, the average trace no. n is calculated from the average
trace no. n
–
1 and the current trace no. n according to the following recurrence:
) ... 1 ( ) (
1
) 1 (
1
) ( c n n Curr
n
n Avg
n
n
n Avg
  


The average trace represents the arithmetic mean value over all n sweeps.
●
n > c: At each sweep point, the average trace no. n is calculated from the average
trace no. n
–
1 and the current trace no. n according to:
) ( ) (
1
) 1 (
1
) ( c n n Curr
c
n Avg
c
c
n Avg
  


The formulas hold for an average factor n = 1 where the average trace becomes equal
to the current trace.
Remote command:
​
[SENSe<Ch>:
​
]AVERage:
​
COUNt
​
​
[SENSe<Ch>:
​
]AVERage[:
​
STATe]
​
​
[SENSe<Ch>:
​
]AVERage:
​
CLEar
​
Mode
Selects one of the following averaging algorithms:
●
Auto: Automatic selection of the averaging mode, depending on the trace format.
●
Reduce Noise: Averaging of the real and imaginary parts of each measurement
result, provides the most effective noise suppression for the "Real" and "Imag" for-
mats and for polar diagrams.
●
Flatten Noise: Averaging of the (linear) magnitude and phase values, provides the
most effective noise suppression for the "dB Mag", "Phase", "Unwr. Phase", and "Lin
Mag" formats.
Changing the mode resets the average cycle.
Remote command:
​
[SENSe<Ch>:
​
]AVERage:
​
MODE
​
on page 535
4.4.2 Sweep Settings
The "Sweep" menu defines the scope of the measurement in the active channel. This
includes the sweep type with various parameters, the trigger conditions and the perio-
dicity of the measurement.
Channel Settings