Digital Standard 3GPP W-CDMA (FDD) SMIQ
1125.5555.03 E-92.198
POWER [DB]
Channel power in dB; range ā60 to 0.0 dB.
The stated power is relative to the powers of other channels and initially does not
refer to the LEVEL power display. After activating ADJUST TOTAL POWER
(top level of 3GPP W-CDMA menu) all power readings as referred to LEVEL.
IEC/IEEE-bus command :SOUR:W3GP:BST3:CHAN3:POW ā10.0
DATA
Selects the data source for the DATA field.
Selection of PN9, PN11, PN15, PN16, ALL0, ALL1 and PATTern.
The PN generator function is explained in section 2.12.3, for example.
If the PATTern data type is used, the pattern can be modified with a special
editor. The length is limited to 24 digits.
IEC/IEEE-bus command :SOUR:W3GP:BST3:CHAN3:DATA PN15
IEC/IEEE-bus command :SOUR:W3GP:BST3:CHAN3:DATA:PATT #H1234,15
TIMING OFFSET
A value greater than 0 causes the source symbols to be shifted prior to
spreading. An offset of 1 for instance is recommended to obtain a low crest
factor.
The absolute starting time of the frames (slot 0) is shifted relative to the
beginning 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 effect of the timing offset is explained in the following. The
value range of the timing offset is from 0 to 149. The parameter is accessible
for DPCHs only.
IEC/IEEE-bus command :SOUR:W3GP:BST3:CHAN3:TOFF 5
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. For DPCHs, the value range is
2 bits to max. 16 bits, for S_CCPCH 0, 8 and 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 command :SOUR:W3GP:BST3:CHAN12:PLEN BIT2
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:BST2:CHAN24:TPC PATT
:SOUR:W3GP:BST2:CHAN24:TPC:PATT #H3F, 8
MC
ON This channel is to be simulated with multicode.
IEC/IEEE-bus command :SOUR:W3GP:BST1:CHAN2:MCOD ON
OFF This channel is to be simulated without multicode.
IEC/IEEE-bus command :SOUR:W3GP:BST2:CHAN99:MCOD OFF
STATE
ON The channel is activated. All parameters in this row are active.
IEC/IEEE-bus command :SOUR:W3GP:BST1:CHAN1:STATE ON
OFF The channel is not active. All parameters in this row are ignored.
IEC/IEEE-bus command :SOUR:W3GP:BST2:CHAN9:STATE OFF
To Next Page
Loading...
