User`s guide

242 Chapter 8
CDMA Digital Modulation
IS-95A Modulation
Adding a Carrier
1. Highlight the 9 channel forward carrier in table row 2.
2. Press
Insert Row > Pilot > Return.
Modifying Carrier Frequency Offset
1. Highlight the Freq Offset value (0.00 kHz) for the new pilot carrier in row 3.
2. Press
Edit Item > −625 > kHz.
Modifying Carrier Power
1. Highlight the Power value (0.00 dB) for the new pilot carrier in row 3.
2. Press
Edit Item > −10 > dB.
You now have a user-defined 4-carrier CDMA waveform with an inserted pilot carrier at a
frequency offset of
−625 kHz and a power level of −10.00 dBm, as shown in the following
figure.
Generating the Waveform
Press
Return > CDMA Off On.
This generates a waveform with the user-defined multicarrier CDMA state created in the
previous sections. The display changes to Multicarrier Setup: 3 Carriers (Modified).