Operating Manual Vol 1 - ES Documentation

SMIQDigital Standard 3GPP W-CDMA (FDD)(TPC PATTERN READOUT MODE)• Single + alt. 01: A bit is taken for each slot from the up to 24-bit long bitpattern for the Transmitter Power Control field of the slots and entered thebit stream several times (depending on the symbol rate. The specified bitpattern is used once, then the TPC sequence is continued with 0 and 1bits alternately (multiplied depending on the symbol rate, e.g. 00001111).• Single + alt. 10: A bit is taken for each slot from the up to 24-bit long bitpattern for the Transmitter Power Control field of the slots and entered inthe bit stream several times (depending on the symbol rate. The specifiedbit pattern is used once, then the TPC sequence is continued with 1 and 0bits alternately (multiplied depending on the symbol rate, e.g. 11110000).The different modes can be used for example to set a mobile to a specificoutput power (e.g. with pattern 11111) and then let it oscillate about thispower (using Single + alt. 01 or Single + alt. 10). Thus power measurementson the mobile can be performed (with a quasi-constant power). In conjunctionwith the option (Mis-)Use TPC for output power control (see below) the TPCRead Out Mode can also be used for generation of various output powerprofiles.IEC/IEEE-bus command :SOUR:W3GP:BST2:TPC:READ CONTMISUSE TPC FOROUTPUT POWERCONTROLTPC bits are used for W-CDMA to inform the called station if the transmitpower is being increased or decreased. If this option is activated, the givenpattern is being misused to vary one’s own transmit power over time. For eachslot, one bit of this pattern is taken to increase (bit = 1) or decrease (bit = 0)the channel power by the stated power step (POWER STEP TPC). The upperlimit is 0 dB and the lower –60 dB. The following envelope occurs at a channelpower of 0 dB, a power step of 1.0 dB, the pattern "001110100000011" andTPC Pattern ReadOut Mode Continuous:Fig. 2-117Dynamic change of channel power (continuous)Note: Observe that the power change (as specified in the standard) isalways performed at the beginning of the slot pilot field.IEC/IEEE-bus command :SOUR:W3GP:BST1:TPC:MIS ONPOWER STEP TPCSize of power step in dB, if option MISUSE TPC FOR OUTPUT POWERCONTROL is activated. The value range is –10.0 dB to +10.0 dB.IEC/IEEE-bus command :SOUR:W3GP:BST1:POW:STEP 1.01125.5555.03 2.195E-9