R&S FSW-K7, User Manual

Page: 22 / 407

Measurements and Result Displays
R&S
®
FSW-K7
22 User Manual 1173.9240.02 ─ 23
Label Description
Mod Freq Modulation frequency
SINAD Signal-to-noise-and-distortion
(Calculated only if AF Spectrum is displayed)
Measures the ratio of the total power to the power of noise and harmonic distortions.
The noise and harmonic power is calculated inside the AF spectrum span. The DC
offset is removed before the calculation.
 







 
power distortion noise
power total
log 20 dB SINAD
THD Total harmonic distortion
The ratio of the harmonics to the fundamental and harmonics. All harmonics inside
the AF spectrum span are considered up to the tenth harmonic.
(Calculated only if AF Spectrum is displayed)
 














 






1
2
2
2
log 20
i
i
i
i
U
U
dB THD
Note: Relative demodulation results. Optionally, the demodulation results in relation to
user-defined or measured reference values are determined. See Chapter 5.7.6, "Result
Table Settings" , on page 124.
In addition, the following general information for the input signal is provided:
●
Carrier Power: the power of the carrier without modulation
●
Carrier Offset: the deviation of the calculated carrier frequency to the ideal carrier
frequency
●
Modulation Depth (AM or RF Time Domain only): the difference in amplitude the
carrier signal is modulated with
Remote command:
LAY:ADD? '1',RIGH,RSUM
, see
LAYout:ADD[:WINDow]?
on page 301
Results:
CALCulate<n>:MARKer<m>:FUNCtion:ADEMod:PM[:RESult<t>]?
on page 312
CALCulate<n>:MARKer<m>:FUNCtion:ADEMod:PM[:RESult<t>]:RELative?
on page 313
Marker Table
Displays a table with the current marker values for the active markers.
This table may be displayed automatically if configured accordingly (see "Marker Table
Display" on page 141).
Tip : To navigate within long marker tables, simply scroll through the entries with your
finger on the touchscreen.