User`s guide

Chapter 15 413
W-CDMA Uplink Digital Modulation for Receiver Test
DPCH
b. Press 14 > 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 14 denotes 14 DTX slots, which spans 2 frames. This is called the
double-frame method. If the value was seven or less, this would mean that the DTX slots
are contained in one frame.
5. Set the second transmission gap length which is expressed as a number of slots per frame.
a. Move the cursor to highlight the TGL2 field.
b. Press
3 > Enter.
For the second transmission gap, the single frame method is used.
6. 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
37 > Enter.
7. Set the duration of the first transmission gap pattern which is expressed as a number of
frames.
a. Move the cursor to highlight the TGPL1 field.
b. Press
6 > Enter.
8. Set the duration of the second transmission gap pattern which is expressed as a number of
frames.
a. Move the cursor to highlight the TGPL2 field.
b. Press
4 > Enter.
9. Set the compressed frame power relative to the non-compressed frames.
a. Move the cursor to highlight the PwrOffs field.
b. Press
6 > dB.
This enables you to compensate for reduced spreading gain. The higher power level makes
the compressed frames easier to view.
10.Enable the compressed frames.
a. Move the cursor to highlight the TGPS field.
b. Press
Edit Item > Active.