Technical data

450 Chapter 16
Spectrum Analyzer
Using the Spectrum Emission Mask Measurement
Spectrum Analyzer
Using the Spectrum Emission Mask Measurement
Use the Spectrum Emission Mask (SEM) measurement (also sometimes referred to
as Conducted Spurious Emissions measurement) to identify and determine the
power levels of spurious emissions outside the assigned CDMA channel. The
measurement is made at the access network output port or at the repeater RF output
port.
The SEM measurement only supports cdma2000, 1xEV-DO, and the W-CDMA
UTRA channel standards, covering band classes 0,1,3,4,5,6, and 10. If you enable
the SEM measurement using an unsupported channel standard, the limit mask will
not be turned on and a message will be displayed telling you that the SEM
Measurement does not support your selected channel standard. The table below
summarizes supported and unsupported CDMA, 1xEV-DO and W-CDMA channel
standards.
Band
Class
Band Name (Applies to
CDMA and 1xEV-DO
Only)
Channel Standard
Name (Applies to
CDMA and 1xEV-DO
Only)
SEM
Measurements
Supported?
0 800 MHz Band. North American Cellular
CDMA (commonly
referred to as, ‘Cellular
Band”)
Yes
1 1900 MHz Band North American PCS
CDMA (commonly
referred to as, “PCS”).
Yes
2 TACS Band TACS CDMA SEM Not
Supported
3 JTACS Band Japan CDMA Yes
4 Korean PCS Band. Korean PCS CDMA Yes
5 450 MHz Band NMT-450 Yes
6 2 GHz Band IMT-2000 cdma2000 Yes
7 700 MHz Band: North American 700
MHz Cellular CDMA
SEM Not
Supported