Rohde & Schwarz FSW-K40, Руководство пользователя

Страница: 18 / 166

Measurements and Result Displays
R&S
®
FSW-K40
18 User Manual 1173.9286.02 ─ 15
Power Shows the power level of the spur in dBc.
Jitter Shows the jitter value of the spur in s.
In addition to the jitter for each spur, the result display also shows the Dis-
crete Jitter and the Random Jitter at the end of the table.
●
The Discrete Jitter is the RMS value of all individual jitter values.
●
The Random Jitter is the difference of the overall jitter (as shown in the
Residual Noise result display) and the Discrete Jitter.
The result is an RMS value: RandomJitter
2
= Jitter
2
- DiscreteJitter
2
For more information see Chapter 4.1, "Spurs and Spur Removal" , on page 22.
Remote command:
FETCh:PNOise:SPURs?
on page 135
FETCh:PNOise:SPURs:DISCrete?
on page 135
FETCh:PNOise:SPURs:RANDom?
on page 135
Sweep Result List
The sweep result list summarizes the results of the phase noise measurement.
The table consists of several rows with each row representing a half decade. The num-
ber of rows depends on the number of half decades analyzed during the measurement.
The sweep results are made up out of several values.
●
Results in a red font indicate that the frequency drift is so large that the frequency
has drifted into the range of a higher half decade. The result is therefore invalid.
●
Results in a green font indicate the half decade that is currently measured.
Start / Stop Shows the start and stop offset of the half decade.
Sampling Rate Shows the sample rate used in the corresponding half decade.
AVG Shows the number of measurements performed in the half decade to calculate the
average (final) result.
Freq Drift Shows the difference to the initial (nominal) frequency that was measured in the
half decade.
If you perform more than one measurement (averages) in the half decade, the
value is updated for each single measurement. The last value that has been mea-
sured in the half decade will remain in the table.