User`s guide

418 Chapter 15
W-CDMA Uplink Digital Modulation for Receiver Test
DPCH
NOTE C/N values less than 10 dB may not be visible on a spectrum analyzer.
You have now set the overall carrier to noise ratio to 25 dB and turned on noise. This is done
to apply a discernible level of noise across the entire channel spectrum. Figure 15-44 shows
the signal on the E4440A display.
Figure 15-44 C/N Setting
Setting EbNo
1. Configure the noise for a particular channel.
a. Move the cursor to highlight the Eb Ref field.
b. Press
Edit Item > DPDCH > Apply Channel Setup.
2. Set the channel E
b
/N
o
value
a. Move the cursor to highlight the Eb/No value field.
b. Press 10 > dB.
Added Noise Level
W-CDMA Signal