Chapter 16 537
W-CDMA Uplink Digital Modulation for Receiver Test
Setting Up Compressed Mode for a Multiple TGPS Transmission
Configuring TGPSI 2
This procedure builds upon the previous procedure, “Configuring TGPSI 1” on page 534 and configures the
second TGPS so that the compressed frames from TGPSI 1 and 2 are properly positioned.
1. Press
2 > Enter > Comp Parameter Setup.
2. Set slot three of the frame as the starting slot for the first transmission gap.
a. Move the cursor to highlight the TGSN field.
b. Press
3 > Enter.
This sets the compressed frame so it has three slots (0–2) of data prior to the transmission gap that starts
with slot three.
3. Set the first transmission gap length which is expressed as a number of slots.
a. Move the cursor to highlight the TGL1 field.
b. Press
7 > Enter.
Out of the 15 slots per frame, the standard specifies that seven of them can be used as discontinuous
transmission (DTX) slots. However the total gap length can be spread over two frames. The value 7
denotes 7 DTX slots, which are contained in one frame since the TGSN value is three. So the single
frame method is being used.
4. Set the second transmission gap length which is expressed as a number of slots.
a. Move the cursor to highlight the TGL2 field.
b. Press
3 > Enter.
The single frame method is also used for the second transmission gap.
5. Set the spacing between the first and second transmission gaps expressed as a number of slots.
a. Move the cursor to highlight the TGD field.
b. Press
29 > Enter.
This positions the second transmission gap (TGL2 field) for TGPSI 2 so it occurs in the second
normal frame transmitted by TGPSI 1. If compressed frames from the different TGPSs occupy the
same frame position (overlap), the ESG will transmit only normal frames. This is shown in Figure
16-54 on page 529.
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