Atec Rohde-Schwarz-SMJ100A - Manual (Page 14)

R&S ® SMJ100A Vector Signal Generator Version 05.00, December 2007 14
Internal baseband I/Q (with R&S ® SMJ-B13 option)
The R&S ® SMJ-B13 converts the internal digital baseband signals of the R&S ® SMJ-B9/-B10/-B11/-B50/-B51 into analog signals for
driving the I/Q modulator. It also generates the analog I/Q output signals.
data rate 100 MHz
resolution 16 bit
D/A converter
sampling rate 400 MHz (internal interpolation × 4)
with amplitude, group delay and
Si correction
bandwidth, roll-off to −0.1 dB 40 MHz
D/A converter interpolation spectra
up to 10 MHz < −80 dBc
Aliasing filter
up to 40 MHz < −73 dBc
carrier leakage
setting range −10 % to +10 %
resolution 0.01 %
I ≠ Q (imbalance)
setting range −1 dB to +1 dB
resolution 0.001 dB
quadrature offset
setting range −10° to +10°
I/Q impairment
resolution 0.01°
I/Q wideband ON, optimize internal I/Q
impairments for RF output ON
up to 10 MHz <1.5 dB, typ 0.7 dB
RF frequency response for entire
instrument in modulation bandwidth
up to 40 MHz <4.5 dB, typ. 2.0 dB
up to 10 MHz >44 dB, typ. 50 dB Suppression of image sideband for entire
instrument in modulation bandwidth
5 up to 40 MHz >34 dB, typ. 44 dB
Carrier leakage 5 referenced to full-scale input < −55 dBc, typ. <−65 dBc
Additional level uncertainty referenced to
CW measured at 0 dBm with 16QAM, root
cosine filter,
α = 0.5, symbol rate 10 kHz
<0.2 dB
I/Q outputs
Output impedance
50 Ω
Output voltage EMF (output voltage depends on set
modulation signal) 1 V (V
p
)
Offset EMF <1 mV
at R
L
= 50 Ω
magnitude
up to 10 MHz typ. 0.02 dB
up to 40 MHz typ. 0.03 dB
nonlinear phase
up to 10 MHz typ. 0.1°
Frequency response 6
up to 30 MHz typ. 0.2°
at R
L
= 50 Ω
magnitude
up to 10 MHz typ. 0.01 dB
up to 40 MHz typ. 0.02 dB
nonlinear phase
up to 10 MHz typ. 0.1°
I/Q balance 6
up to 30 MHz typ. 0.2°
at R
L
= 50 Ω
SFDR (sine)
up to 2 MHz >70 dB
up to 20 MHz typ. 60 dB
phase noise
10 MHz sinewave at 20 kHz offset typ. −150 dBc
wideband noise
Spectral purity
10 MHz sinewave at 1 MHz offset typ. −155 dBc
5 Value applies after 1 hour warm-up time and recalibration for 4 hours of operation and temperature variations of less than +5 °C.
6 Optimize internal I/Q impairments for RF output switched OFF.