Rohde & Schwarz SMIQ02B - Page 176

SMIQ Digital Modulation
1125.5555.03 E-92.107
(FILTER...) FILTER TYPE
Opens a window for selecting a type of filter. The
following filters can be selected:
SQR_COS Square Root RaisedCosine
IEC
:SOUR:DM:FILT:TYPE SCOS
COS Cosine
IEC
:SOUR:DM:FILT:TYPE COS
GAUSS Gaussian filter
IEC
:SOUR:DM:FILT:TYPE GAUS
GAUSS
LINEAR Linearized Gaussian filter for
GSM_EDGE.
IEC
:SOUR:DM:FILT:TYPE LGA
BESSEL Bessel filter with B×T = 1.25 or 2.5
IEC
:SOUR:DM:FILT:TYPE BESS1
IS95 Filter for CDMA mobile station
according to Interim Standard 95
IEC :SOUR:DM:FILT:TYPE IS95
IS95 EQUAL Filter for CDMA base station with
equalizer according to IS-95
IEC :SOUR:DM:FILT:TYPE EIS95
APCO C4FM Cosine filter with si(x)-compensation
according to APCO25 standard for
4FSK modulation.
IEC
:SOUR:DM:FILT:TYPE APCO
TETRA Filter for PSK/QAM modulation.
IEC
:SOUR:DM:FILT:TYPE TETR
WCDMA0.22 Filter for PSK modulation. Square Root
Raised Cosine filter with Roll Off =
0.22, optimized for W-CDMA
IEC
:SOUR:DM:FILT:TYPE WCDM
RECTANGLE Filter with a rectangular impulse
answer of 1 symbol length.
IEC :SOUR:DM:FILT:TYPE RECT
SPLIT PHASE Filter for ASK modulation
IEC
:SOUR:DM:FILT:TYPE SPH
USER User defined filter. The lists can be
generated via
:DM:FLISt:SEL and
filled via
:DM:FLISt:DATA.
IEC :SOUR:DM:FILT:TYPE USER
FILTER PARAMETER
Opens a window for setting the filter parameter. The
selection depends on the selected filter type:
Parameter Filter Type
Roll-off factor SQR COS, COS, or APCO:
Normalized
band width B×T
Symb
GAUSS .
IEC/IEEE-bus
:SOUR:DM:FILT:PAR 0.2
FILTER MODE
Selection of filter mode.
LOW_ACP Filter for minimum Adjacent C
hannel
Power
IEEE :SOUR:DM:FILT:MODE LACP
LOW_EVM Filter for minimum vector error
IEEE
:SOUR:DM:FILT:MODE LEVM