Anritsu AWGN MU368060A - Manual (Page 38)

Section 6 AWGN Internal Adder Function
6-6
6.3 Function Details
Image diagram for the AWGN internal adder function is shown below:
Noise is added to the same carrier as the W-CDMA modulation wave and
outputted as I/Q and RF signals.
Setting and displayed values for the AWGN internal adder function are
shown below:
[1] C/N
Is the ratio between noise power within 3.84 MHz bandwidth and W-
CDMA modulation wave power. The total power of noise and W-
CDMA modulation wave is fixed to the set value for RF Level.
Therefore, the lower C/N is set, the larger the noise power becomes
and the lower the W-CDMA modulation wave power becomes. To
change the noise power while fixing W-CDMA modulation wave
power, both C/N and RF Level settings must be changed.
[2] Output Level
Is total of noise power and W-CDMA modulation wave power. Same
as the setting value for RF Level while using the AWGN internal ad-
der function.
7.68 / 5.76 MHz
3.84 MHz
Carrier frequency
W-CDMA
Modulation Wave
Noise
(AWGN)