Atec Rohde-Schwarz-SMIQ Series - Manual (Page 20)

20 Vector Signal Generator R&S SMIQ – Specifications
Assistant functions to facilitate operation
Test models
Downlink
Uplink (not standardized)
test model 1 with 16/32/64 channels
test model 2
test model 3 with 16/32 channels
test model 4
DPCCH + 1 DPDCH at 60 ksps sample rate
DPCCH + 1 DPDCH at 960 ksps sample rate
Parameterizable predefined settings generation of complex signal scenarios in downlink with parameter-
izable default settings
selectable parameters:
use and symbol rate of special channels (for synchronization of
mobile),
number and symbol rate of data channels,
crest factor: minimal/average/worst
Multichannel edit common configuration of data channels of BS channel table;
selectable parameters, partly with start value and step size:
range of data channels to be set,
symbol rate,
channelization code with step size,
channel power with step size,
data, TPC,
timing offset with step size,
multicode state,
state
Copy BS/MS adopting the configuration of a BS for another BS/MS for the defini-
tion of multi-BS/MS scenarios or BS signals with more than
128 channels
parameters:
source and destination of copying,
channelization code offset for simple definition of BS signals with
more than 128 channels and continuous channelization codes
Resolve domain conflicts elimination of code channel overlapping in code domain (domain
conflicts) occurring in a BS/MS
Graphic displays
Domain conflicts Display of domain conflicts (overlapping of code channels in code
domain) in the lines concerned of the channel tables. The code
domain occupied by the code channels involved in the conflict can
also be displayed.
Code domain Display of code domain occupied by current BS. Domain areas in
which conflicts occur are highlighted. The distribution of code chan-
nels in the code domain as well as channel powers are shown qual-
itatively.
Channel graph Display of all active channels of a BS versus the channel table
index. The powers of the code channels are shown qualitatively.
CCDF Display of complementary cumulative distribution function of current
signal. This function gives the probability of the magnitudes of com-
plex IQ samples exceeding a predefined threshold. Together with
the current CCDF, the CCDFs of the two 3GPP signals last gener-
ated can be displayed to observe the effect of parameter changes.
The crest factor of the signal can be seen in the CCDF.
Constellation diagram Display of constellation diagram versus IQ samples of current 3GPP
signal. This diagram allows qualitative assessment of channel con-
figuration, channel power ratios, and the effect of parameters such
as data and data offset.