R&S WinIQSIM2 Software Manual - Rohde & Schwarz

R&S ® WinIQSIM2
Graphical User Interface
Baseband Block
Split Phase
BxT
SOUR:BB:DM:FILT:TYPE SPH
SOUR:BB:DM:FILT:PAR:SPH 0.15
Rectangular
SOUR:BB:DM:FILT:TYPE RECT
Dirac
SOUR:BB:DM:FILT:TYPE DIRac
Lowpass ACP opt.
SOUR:BB:DM:FILT:TYPE LPASs
SOUR:BB:DM:FILT:PAR:LAPS 0.5
Lowpass EVM opt.
BB:DM:FILT:TYPE LPASSEVM
BB:DM:FILT:PAR:LAPSSEVM 0.5
EUTRA/LTE
SOUR:BB:DM:FILT:TYPE LTEFilter
These predefined filters are designed for the special spectrum characteristics of the different
communication standards. However, depending on the selected filter form one or
more filter parameters are additionally provided for even precise adjustment of the filter
characteristic, like more steeper edges or customization the transition bandwidth. For
more information on the provided settings, refer to ​"Impact of the Filter Parameters"
on page 60.
Impact of the Filter Parameters
The following is a simple description of the filter parameters and the way they affect the
main filter characteristics. Changing filter parameters is an effective way to ensure that
the entire bandwidth of the desired signal is allowed to pass and adjust the filter form to
reach spectrum mask requirements
Cut Off Frequency
The cut off frequency or corner frequency is a filter characteristic that defines the frequency
at the 3 dB down point. This frequency is the bound to the transition band; here
Software Manual 1008.0858.42 ─ 10
60