Rohde & Schwarz RTP044 - Page 1008

I/Q software interface (Option R&S RTP-K11)
R&S
®
RTP
1008User Manual 1337.9952.02 ─ 12
Channel On/Off
Switches the channel signal on or off. The signal icon appears on the signal bar. The
waveform of the last acquisition is displayed in the diagram.
Remote command:
CHANnel<m>:STATe on page 1199
Carrier frequency
Sets the carrier frequency of the modulated RF signal or of the complex signal in IF
range. The minimum carrier frequency is 10 mHz, the maximum frequency corre-
sponds to the input sample rate.
Remote command:
CHANnel<m>:IQ:CFRequency on page 2252
Sideband (real input)
Defines the frequency position of the RF spectrum in the input signal: normal or
inverse. The position is important for correct down-conversion and filtering.
●
"Normal" position of the RF spectrum
f
c
- f
c
x(t)e
j2
π
f
c
t
- 2f
c
-
f
c
- f
c
- 2f
c
Down-conversion Filtering
f
c
- f
c
Input signal, normal
●
"Inverse" position of the RF spectrum
f
c
- f
c
x(t)e
j2
π
f
c
t
- 2f
c
f
c
- f
c
- 2f
c
Down-conversion Filtering
f
c
- f
c
Input signal, inverse
Remote command:
CHANnel<m>:IQ:SBRF on page 2253
Sideband (complex IF input)
Defines the sideband and the frequency position of complex modulated input signal in
IF range.
●
"Normal/Upper": Upper sideband in normal position
f
c
Input signal: normal
position, upper sideband
f
c
x(t)e
j2
π
f
c
t
-
Down-conversion and
filtering
●
"Normal/Lower": Lower sideband in normal position
I/Q sampling setup