Atec Rohde-Schwarz-SMU200A - Manual (Page 22)

Version 08.00, January 2012
22 Rohde & Schwarz R&S ® SMU200A Vector Signal Generator
resolution 18 bit
logic format two’s complement
physical signal level
setting range 0 to –60 dBFS
resolution 0.01 dBFS
bandwidth
sample rate = 100 MHz
(no interpolation, user-defined) 40 MHz
I/Q data
sample rate < 100 MHz (interpolation) 0.31 × sample rate
markers 4 Control signals
data valid valid samples marked in data stream
Baseband input (analog/digital) (R&S
®
SMU-B17 option)
At least one R&S ® SMU-B13 baseband main module and at least one R&S ® SMU-B9/-B10/-B11 I/Q baseband generator must be
installed. The R&S ® SMU-B17 option makes it possible to feed external analog or digital signals to the baseband section of the
R&S ® SMU200A. The frequency of the signals can be shifted, and the signals can be added to the internally generated signal with
settable level ratio. If the R&S ® SMU200A is equipped with a fading simulator, the input signals can also be faded.
Mode see also simultaneous modulation analog input,
digital input
peak level
setting range –10 dB to 0 dB referenced to full scale
resolution 0.01 dB
crest factor
setting range 0 dB to 30 dB
resolution 0.01 dB
Input level
The adjust level function automatically determines the peak level and crest factor of the
input signal.
The frequency offset can be used to shift the center frequency of the input signal in the
baseband. The restrictions caused by the modulation bandwidth apply.
setting range
−40 MHz to +40 MHz
resolution 0.01 Hz
Frequency offset
frequency accuracy < 5 Ч 10 − 10 Ч frequency offset +
reference frequency error
I/Q swap I and Q signals swapped on/off
Analog I/Q inputs
All specifications apply to a peak level of 0 dB.
input impedance 50 Ω
VSWR up to 30 MHz < 1.1, 1.03 (typ.)
I/Q inputs
input voltage for full-scale input
q
2 2
i
+ = 0.5 V V V
carrier leakage I, Q
setting range −10 % to +10 %
resolution 0.01 %
I ≠ Q (imbalance)
setting range −3 dB to +3 dB
resolution 0.001 dB
I/Q skew
setting range –1 ns to +1 ns
I/Q impairment
resolution 1 ps
sample rate 100 MHz A/D converter
resolution 14 bit
with amplitude and group delay correction
bandwidth, roll-off to –0.1 dB
30 MHz
Aliasing filter
stopband rejection, f ≥ 70 MHz 80 dB (typ.)
I/Q wideband: on, optimize internal I/Q impairments for RF output: on
up to 10 MHz 0.2 dB (typ.)
RF frequency response for entire
instrument in modulation bandwidth
up to 30 MHz 0.4 dB (typ.)