Digital Standard IS-95 CDMA
SMIQ
1125.5555.03
E-9
2.138
SET DEFAULT
Provides the default setting for the channel configuration of the forward link
modes.
For FWD_LINK_18:
- channels 0 to 8 are switched on
- the power of the pilot channel (channel 0) makes out 20% of the total power
(-7 dB).
- channel 1 is set as sync channel by WALSH CODE 32
- channel 2 is set as paging channel
- the remaining 7 channels are configured as traffic channels
The power setting was selected according to the "Base Station Test Model"
of TIA standard IS-97.
For FWD_LINK_64:
- all 64 channels are switched on
- the power of the pilot channel makes out 20% of the total power (-7 dB).
- the remaining 80% of the transmit power is distributed equally on the
remaining 63 channels.
IEC/IEEE-bus command
:SOUR:IS95:PRES
MODULATION...
Opens a window for setting the modulation parameters.
Fig. 2-82
Menu DIGITAL STD - IS-95 - MODULATION..., equipped with options modulation coder
SMIQB20, data generator SMIQB11 and SMIQB42
(MODULATION...)
MODULATION TYPE
Indicates the modulation type.
CHIP RATE
Setting value of chip clock frequency.
Preset to 1.2288 Mcps.
IEEE-bus command
:SOUR:IS95:CRAT 1.2 MHZ
(MODULATION...)
FWD LINK FILTER...
Opens a window for selecting the baseband filters
for the forward link. A selection between the FIR
filters defined in IS-95, the Nyquist filters COS and
SQRCOS or a user-defined filter USER (cf. Section
Digital Modulation) is possible. A FIR filter is preset
with equalizer according to IS-95.
IEEE command
:SOUR:IS95:FILT:FTYP EIS95
