R&S RTO6, Руководство пользователя

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I/Q software interface (Option R&S RTO6-K11)
R&S
®
RTO6
1063 User Manual 1801.6687.02 ─ 05
Sample rate
Sets the required sample rate of the output I/Q data.
Remote command:
IQ:SRATe
on page 2474
Record length
Sets the required record length of the output I/Q data. The resulting acquisition time of
the I/Q data is:
Acquisition time = Record length / Sample rate
Remote command:
IQ:RLENgth
on page 2474
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 1337
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 2475
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
j2πf
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
j2πf
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 2475
I/Q sampling setup