The downlink pilot timeslot/channel is used for downlink synchronization and cell initial search. There are 32 different downlink synchronization codes used to distinguish base stations. The DwPTS is 75 ms long. The content of DwPTS is composed of 64 chips of a SYNC-DL sequence and 32 chips of guard period (GP). The SYNC-DL code is not scrambled. The SYNC-DL is QPSK modulated and the phase of the SYNC-DL is used to signal the presence of the P-CCPCH in the multi-frame of the resource units of channel code 1 and 2 in timeslot 0.
DwPTS Downlink Pilot Timeslot
Choice: ON | OFF
Default: On
Double-click or use the drop-down menu to set the state of the downlink pilot timeslot or .
Range: –60 to 0 dB.
Default: 0 dB
Enter a value to set the downlink pilot timeslot power. The CDP graph displays the normalized power of each RU in each timeslot after you generate the waveform. Refer to the Power Setting for the power calculation of the carriers, channels/timeslots and RUs.
Choice: 0 to 31
Default: 0
Enter a value to set the downlink synchronization code used in DwPTS.
Range: –8 to 8 chips
Default: 0.000 Chips
This cell displays the Time Offset for DwPTS. You cannot edit the value in this cell.
Choice: None | S1 | S2 | USER
Default: S1
This cell defines the
type of phase rotation sequence for the modulation
for the SYNC-DL. When you click the cell, a drop-down arrow 
provides access to the DwPTS
Phase Pattern Entry window where you configure the S1, S2, and USER
parameter for 80 subframes.