Agilent Technologies ESG Betriebsanweisung Seite 408

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392 Chapter 15
W-CDMA Uplink Digital Modulation for Receiver Test
Setting Up a Multiple PRACH Signal
a. Highlight Off for UE2 in the On/Off column.
b. Press the
Edit Item softkey.
Each press of the
Edit Item softkey turns the UE on or off.
c. Repeat steps a and b for UE4.
Setting the Preamble Signature
The signature is used by the base station to identify which UE it is communicating with. This
task assumes the factory preset conditions for the timing setup table.
1. Set the UE1 preamble signature to five.
a. Highlight the Signature field that corresponds to UE1.
b. Press
5 > Enter.
The range for this field is 0 to 16.
2. Set the UE2 preamble signature to seven.
a. Highlight the Signature field that corresponds to UE2.
b. Press
7 > Enter.
3. Set the UE4 preamble signature to zero.
a. Highlight the Signature field that corresponds to UE4.
b. Press
0 > Enter.
Configuring Access Slots
When transmitting multiple PRACHs for the same UE, they cannot occupy any of the same
access slots within the 80 ms period. If they do, the subsequent (second PRACH, etc.) PRACH
transmission that uses any of the same access slots will not be occur.
There are two ways to enter the access slot number within the timing setup table:
Enter the access slot number using the numeric keypad and press the
Enter softkey.
•Press the
Edit Item softkey, enter the number using the numeric keypad, and press Enter.
Access slot numbers can be entered into positions that either contain dashes or that already
contain an access slot number.
Conversely there are also two ways to eliminate access slot numbers:
Highlight the position for a UE that contains the unwanted access slot within the 80 ms
time period. Press the Edit Item softkey and then the Off softkey that appears.
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