Rohde & Schwarz R&S UPP, Руководство пользователя

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Instrument Functions
R&S
®
UPP
245 User Manual 1411.1055.32 ─ 10
The signal consists of 2 sine waves: a low-frequency unwanted signal and a high-fre-
quency wanted signal. The level of the unwanted signal is 1 to 10 times as high as the
level of the wanted signal.
According to IEC 268
‑
3, the frequency of the unwanted signal is between 0.5 and 1.5
octaves above the lower cutoff frequency of the DUT (60 Hz according to SMPTE).
According to IEC 268
‑
3, the frequency of the wanted signal is between 0.5 and 1.5
octaves below the upper cutoff frequency of the DUT (7 kHz according to SMPTE).
The frequency ratio of wanted signal to unwanted signal has to be higher than 8.
According to SMPTE, the level ratio of unwanted signal to wanted signal must be 4:1;
according to IEC 268-3, a ratio of 10:1 is also possible.
Panel of digital generator with Mod Dist function selected
Function
Selects the Mod Dist test signal.
Remote command:
SOURce:FUNCtion
on page 697
MDISt
Dither
In the digital generator, a noise component with adjustable amplitude can be superim-
posed on the signal. The checkbox enables or disables this function.
The parameter fields for Dither do not appear in the analog generator.
Remote command:
SOURce:SINusoid:DITHer:STATe
on page 698
SOURce:SINusoid:DITHer
on page 698
Sweep Ctrl
Used to activate the sweep system. The frequency of the wanted signal or the total
level of the signal can be varied within a selectable range from the start to the stop
value. If frequency or level is selected as the x-axis, the measured values can be dis-
played as a curve in the Sweep Graph graphical window.
Generator Signals