SMIQ
Digital Standard W-CDMA (NTT DoCoMo/ARIB 0.0)
1125.5555.03
E-9
2.155
STATE
Switch on/off of modulation Digital Standard W-CDMA. Vector modulation and
digital modulation will be switched off automatically.
STATE = ON starts the calculation of a chip sequence based on the current
settings. The lenght of the chip sequence and therefore the duration of
calculation are determined by parameter SEQUENCE LENGTH.
IEC/IEEE-bus command
:SOUR:WCDM:STAT ON
MODE...
Opens a window for selecting from the different modes to determine the
number of code channels.
The physical channel type (TYPE), the symbol rate, some spreading para-
meters (SPREAD CODE) and the source for modulation data (DATA) can be
separately defined for each channel. Each channel can be switched on or off
(STATE).
4CHAN
Activates the generation of a signal with up to 4 code
channels (channel No. 0 to 3).
The relative power (POWER) of the channels can be
freely determined in range -30 dB to 0 dB.
IEC/IEEE-bus
:SOUR:WCDM:MODE CHAN4
8CHAN
Activates the generation of a signal with up to 8 code
channels (channel No. 0 to 7)
.
The relative power (POWER) of channel 0 can be freely
determined in range -30 dB to 0 dB. The power setting of
channel 1 also determines the power setting of channels
2 to 7
.
This means that channels 1 to 7 all have the same
power provided when the channels are switched on.
IEC/IEEE-bus
:SOUR:WCDM:MODE CHAN8
15CHAN
Activates the generation of a signal with up to 15 code
channels (channel No. 0 to 14)
.
The relative power of channels cannot be freely defined
since all activated code channels have the same power.
The relative power is displayed (POWER).
IEC/IEEE-bus
:SOUR:WCDM:MODE CHAN15
