Atec Rohde-Schwarz-SMJ100A - Manual (Page 30)

R&S ® SMJ100A Vector Signal Generator Version 05.00, December 2007 30
Noise generation
Additive white Gaussian noise (AWGN, R&S ® SMJ-K62 option)
The R&S ® SMJ-B13 baseband main module must be installed.
Addition of an AWGN signal of settable bandwidth and settable C/N ratio or E
b
/N
0
to a wanted signal. If the noise generator is used,
a frequency offset cannot be added to the wanted signal.
distribution density Gaussian, statistical, separate for I and Q
crest factor >18 dB
Noise
periodicity >48 h
setting range −30 dB to +30 dB
resolution 0.1 dB
C/N, E
b
/N
0
uncertainty for system bandwidth = symbol
rate, symbol rate <4 MHz,
–24 dB < C/N < 30 dB and
crest factor <12 dB <0.1 dB
bandwidth for determining noise power
range 1 kHz to 80 MHz
System bandwidth
resolution 100 Hz