SMIQ Digital Standard 3GPP W-CDMA (FDD)
1125.5555.03 E-92.209
(MULTI CHANNEL
EDIT...)
PILOT LENGTH
Length of the pilot field in the slot structure of a
channel. The value range of this parameter depends
on the symbol rate (2 bits to max. 16 bits). To
achieve a constant length of the slot the data fields
are lengthened or shortened depending on the pilot
length as defined in the standard.
IEC/IEEE-bus :SOUR:W3GP:MCH:PLEN BIT2
CHANNELIZATION
CODE / STEP
Channelization code for the first channel and step
width for all other channels. The value ranges depend
on the symbol rate.
IEC/IEEE-bus commands
:SOUR:W3GP:MCH:CCOD 4
:SOUR:W3GP:MCH:CCOD:STEP 1
POWER / dB
POWER STEP / dB
Channel power for the first channel (value range
-60 dB to 0 dB) and stepwidth for all other channels
(value range -60 dB to 60 dB).
IEC/IEEE-bus commands
:SOUR:W3GP:MCH:POW –20
:SOUR:W3GP:MCH:POW:STEP 1
DATA
Selection of data pattern for the DPCHs. For other
patterns see channel table.
IEC/IEEE bus commands
:SOUR:W3GP:MCH:DATA PN9
:SOUR:W3GP:MCH:DATA:PATT #HFFFF, 16
TIMING OFFSET /
TIMING OFFSET STEP
A value > 0 causes the source symbols to be shifted
prior to spreading. An offset of 1 for instance is
recommended to obtain a lower crest factor.
The absolute starting time of frames (slot 0) is shifted
relative to the start of the scrambling code sequence
by T
Offset
* 256 chips. This means that the resolution
of the timing offset is always 256 chips, irrespective
of the symbol rate. The step width of the timing offset
between two adjacent channels is defined with STEP.
IEC/IEEE bus commands
:SOUR:W3GP:MCH:TIM:OFFS 0
:SOUR:W3GP:MCH:TIM:STEP 3
TPC
Data source for the TPC field.
IEC/IEEE-bus :SOUR:W3GP:MCH:TPC ZERO
MULTI CODE STATE
ON The channels should be simulated with
multicode.
IEC/IEEE bus :SOUR:W3GP:MCH:MCOD ON
OFF The channels should be simulated without
multicode.
IEC/IEEE bus :SOUR:W3GP:MCH:MCOD OFF
STATE
ON The channels are active.
IEC/IEEE bus :SOUR:W3GP:MCH:STAT ON
OFF The channels are not active.
IEC/IEEE bus :SOUR:W3GP:MCH:STAT OFF
EXECUTE
Configuration of DPCHs according to the set para-
meters.
IEC/IEEE bus :SOUR:W3GP:BST2:MCH:EXEC
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