Atec Rohde-Schwarz-SMIQ Series - Manual (Page 27)

Vector Signal Generator R&S SMIQ – Specifications 27
Enhanced fading functions for WCDMA 3GPP with option R&S SMIQB49
The following data deviate from the specifications for R&S SMIQB14/R&S SMIQB15:
Noise and distortion simulation with option R&S SMIQB17 13 )
Modes standard fading, fine delay, moving delay, birth-death
Setting time after RF frequency change 6 ms
Fine delay mode
RF bandwidth
Number of paths
Profiles
Delay
Delay resolution
4.8 MHz
2 (with R&S SMIQB14),
4 (with R&S SMIQB14 + R&S SMIQB15)
Rayleigh, pure Doppler
25 ns to 1637 µs
1 ns
Moving delay mode
RF bandwidth
Number of paths
Delay, path 1
Delay, path 2
Delay variation (peak-peak)
Variation period
Delay step size
Profiles
4.8 MHz
2
0 to 1000 µs (in 50 ns steps)
150 ns to 50 µs
10 s to 500 s
<1 ns
none
Birth-death mode
Number of paths
Profiles
Delay
Delay range (birth-death process)
Delay grid
Hopping dwell
2
pure Doppler
5 µs to 1000 µs
5 µs to +5 µs (not variable)
1 µs (not variable)
100 ms to 5 s
RF bandwidth ( −3 dB) >14 MHz
Additional frequency response
up to 5 MHz offset from carrier
Carrier leakage 9 )
<0.6 dB, 0.4 dB typ.
−40 dBc typ.
Distortion simulator
Type of distortion
AM/AM and AM/ ϕM distortion of modulation signal
Distortion characteristic each characteristic programmable by entering up to 30
input values via IEC/IEEE bus or by entering up to five poly-
nomial coefficients
Resolution 12 bit
Noise generator (AWGN)
Distribution density
Gaussian, statistically independent for I and Q
Crest factor 14 dB
C/N
Range
Resolution
Error for system bandwidth = symbol rate and C/N <20 dB 3 )
Vector, PSK, QAM modulation
FSK, GMSK modulation
10 )
−30 dB to 30 dB
0.1 dB
<0.4 dB
<0.4 dB
System bandwidth
Range
Resolution
relevant bandwidth for determining noise power N
10 kHz to 10 MHz
1 x 10
–2
Output spectrum white noise
Frequency response up to 0.7 x system bandwidth and
5 MHz offset from carrier at RF output
3 ) <0.8 dB
delay variation
(pk-pk)
2
2 π t
variation period
sin delay path1+ Ч