Customer Service Center
Spirent KB Article
Doc ID: FAQ17414
Email Article Link
VR5: How to set C/N ratio for LTE 1 RB test?
This is how to set offset when you are using different receiver bandwidth other than the GUI setting:
For example, GUI set like below:
AWGN bandwidth = 1.5625MHz
Receiver bandwidth = 0.100MHz
If you are going to use 15KHz bandwidth, the offset will be caculate according to below formula:
New C/N = -10dB (Original C/N)-10xlog(Current Recevier bandwidth/New Receiver bandwidth)=-10dB -10xlog(100kHz/15kHz) = -10-8.2=-18.2dB
Set this new C/N = -18.2dB on the VR5 GUI, this will be the new C/N settings for new receiver bandwidth.
Product : VR5