Operating Manual Vol 1 - ES Documentation

SMIQDigital Standard 3GPP W-CDMA (FDD)2.14.2.2 WCDMA/3GPP Menu - Para. Predef. SubmenuWith the Para. Predef. function, it is possible to create highly complex scenarios with just a fewkeystrokes. This function is of use if, say, just the envelope of the signal is of interest. The menu is onlyavailable in the downlink.Fig. 2-110DIGITAL STD - WCDMA/3GPP - PARA. PREDEF. menu (downlink only)CHANNELS FORSYNC OF MOBILEWhen this parameter is set to ON, all "special channels" required by a mobilefor synchronization are automatically activated. These are the followingchannels: P-CPICH, P-SCH, S-SCH, PCCPCH.IEC/IEEE-bus command :SOUR:W3GP:PPAR:SCH OFFSCCPCH OFF SCCPCH is not used in the scenario.IEC/IEEE-bus command:SOUR:W3GP:PPAR:SCCPC:STAT OFF15k, 30k, to 960k SCCPCH is used in the scenario at the stated symbol rate.IEC/IEEE-bus commands:SOUR:W3GP:PPAR:SCCPC:STAT ON:SOUR:W3GP:PPAR:SCCPC:SRAT D15KNUMBER OF DPCHSYMBOL RATECRESTNumber of DPCH in the scenario. The minimum number is 0. The maximumnumber is the ratio of the chip rate and the symbol rate (maximum 512 at thelowest symbol rate of 7.5 ksps).IEC/IEEE-bus command :SOUR:W3GP:PPAR:DPCH:COUN 123Symbol rate of all DPCH.Possible values are 7,5k, 15k, 30k, 60k, 120k, 240k, 480k and 960k.IEC/IEEE-bus command :SOUR:W3GP:PPAR:DPCH:SRAT D30KThe crest factor of the signal can be modified by setting appropriatechannelization codes and timing offsets.MINIMUM: The crest factor is minimized (the channelization codes aredistributed uniformly over the code domain. The timing offsets areincreased by 3 per channel).IEC/IEEE-bus command :SOUR:W3GP:PPAR:CRES MINAVERAGE: An average crest factor is set (the channelization codes aredistributed uniformly over the code domain. The timing offsets are allset to 0).IEC/IEEE-bus command :SOUR:W3GP:PPAR:CRES AVERWORST: The crest factor is set to an unfavourable value (i.e. maximum)(the channelization codes are assigned in ascending order. Thetiming offsets are all set to 0.)IEC/IEEE-bus command :SOUR:W3GP:PPAR:CRES WORS1125.5555.03 2.189E-9