Operating Manual Vol 1 - ES Documentation

Fading SimulationSMIQSTANDARDSPEED UNITINSERTION LOSSSETTING MODEOpens a window for selecting a standard setting of the fading paths. Theparameter settings comply with the measurement specifications of mobilecommunication standards (e.g. GSM, CDMA, NADC).With standards TETRA TYPICAL URBAN and TETRA HILLY TERRAIN, all6 paths are used with these parameters instead of the stipulated 2 paths. Thisyields an improved residual carrier with the same output signal.IEC/IEEE-bus command SOUR:FSIM:STAN CDMA100Selection of the speed unit.IEC/IEEE-bus command :SOUR:FSIM:SPE:UNIT KMPHSelection of setting mode for the insertion loss of the fading simulator.NORMAL The minimum insertion loss for a path of the fading simulator isfixed to 18 dB. The value has been chosen so that even with LogNormal-Fading switched on, the fading simulator will seldom beoverdriven. This setting should be chosen for BER measurements.IEC/IEEE-bus command :SOUR:FSIM:ILOS:MODE NORMLOW_ACP The minimum insertion loss is between 6 and 12 dB. The valuedepends on the PATH LOSS setting of the selected paths. Thismode is ideal for all STANDARD menu settings regardingsignal/noise ratio and residual carrier suppression. This settingshould be chosen for measurements which involve an adjacentchannelinterfering signal generated by the SMIQ.IEC/IEEE-bus command :SOUR:FSIM:ILOS:MODE LACPSHOW PATHS Switching from the display of paths 1 to 6 to the display of paths 7 to 12.COUPLEDPARAMETERS...SET SECOND SMIQCREST FACTOR TOSET DEFAULTIn this submenu, parameters SPEED, COEFF, LOCAL CONST and STD DEVcan be coupled via the ON setting. If one of these parameters is modifiedafterwards in a particular path, the parameters of all other paths will be modified.SPEED SETTING COUPLED ON Parameters coupled for all paths.OFF Parameter can be set individually.IEC/IEEE :SOUR:FSIM:COUP:SPE ONCORR COEFF SETTING ON Parameters coupled for all paths.COUPLED OFF Parameter can be set individually.IEC/IEEE :SOUR:FSIM:COUP:CORR:COEF ONLOCAL CONST SETTING ON Parameters coupled for all paths.COUPLED OFF Parameter can be set individually.IEC/IEEE :SOUR:FSIM:COUP:LOGN:LCON ONSTD DEV SETTING COUPLED ON Parameters coupled for all paths.OFF Parameter can be set individually.IEC/IEEE :SOUR:FSIM:COUP:LOGN:CSTD ONIndication of crest factor which has to be set on the second SMIQ in the vectormodulation menu so that the insertion loss caused by the fading simulator (in thefirst SMIQ) is compensated correctly on the second SMIQ.IEC/IEEE-bus command :SOUR:FSIM:CFAC:EXT?Default setting of path parameter with path 1 switched on and all other pathsswitched off.IEC/IEEE-bus command :SOUR:FSIM:DEF1125.5555.03 2.74 E-9