Digital Standard 3GPP W-CDMA (FDD) SMIQ
1125.5555.03 E-92.200
SCRAMBLING CODE
MODE
A distinction is made between Long and Short Scrambling Code. The
differences between the two codes can be found in section 2.14.1.1. The short
SC can only be selected in the mode DPCCH + DPDCH. For PRACH and
PCPCH, the long SC is always used.
IEC/IEEE-bus command :SOUR:W3GP:MST2:SCOD:MODE LONG
For test purposes, it is also possible to deactivate the scrambling code (OFF).
IEC/IEEE-bus command :SOUR:W3GP:MST2:SCOD:MODE OFF
SCRAMBLING CODE
The scrambling code generator (previously called long code generator) is used
to scramble the chip sequence depending on the transmitter. For more
information of the structure of the generator and its initialization refer to section
2.14.1.1. The value range of the scrambling code is 0 to FF FFFF.
IEC/IEEE-bus command :SOUR:W3GP:MST1:SCOD #H1
TPC
Selects the data source for the TPC field.
ALL0 All 0s are continuously entered in the TPC field.
IEC/IEEE-bus command :SOUR:W3GP:BST1:CHAN2:TPC ZERO
ALL1 All 1s are continuously entered in the TPC field.
IEC/IEEE-bus command :SOUR:W3GP:BST2:CHAN129:TPC ONE
PATT The TPC field is cyclically filled with a pattern that is up to 24 bits long.
One bit is taken from this pattern per slot and, if necessary, redupli-
cated. A special pattern editor is displayed.
IEC/IEEE-bus commands
:SOUR:W3GP:MST1:TPC:DATA PATT
:SOUR:W3GP:BST2:CHAN24:TPC:PATT #H3F, 8
DLIST The TPC field is cyclically filled with a data list. Per slot, one bit is
taken from the list and duplicated (only offered with option SMIQB48
installed and the DPCCH is calculated as an enhanced channel.)
IEC/IEEE-bus command
:SOUR:W3GP:MST1:TPC:DATA DLIS "mylist"
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