Anritsu Spectrum Master MS2720T, User Manual

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3-4 EVDO RF Measurements Setup EVDO Signal Analyzer
3-6 PN: 10580-00235 Rev. D 3GPP2 MG
Spurious Emission Setup
The Spurious Emission test examines emissions at frequencies that are outside of the
assigned EVDO channel. Spurious emission should be measured at the base station RF
output port by using a direct cable connection.
To perform the test, select the correct band class and channel number. A band-class-specific
mask will be shown on the screen. Maximum emission power in each frequency offset region
will be highlighted by markers. Typical resolution bandwidths (RBW) that are used in the
emission test are 30 KHz and 1 MHz. Due to the variable RBW in some band classes, the
spectrum can appear to have “steps”.
For accurate EVDO emission measurements, users are required to input an all-idle or
all-active signal, and to set the instrument slot setting accordingly. The emission mask is
drawn according to the following document: Recommended Minimum Performance Standards
for cdma2000 High Rate Packet Data Access Network. (See 3GPP2 C.S0032-A or TIA-864-A
for details.)
From the
RF Measurement
menu, press the
Spurious Emission
submenu key to activate the
measurement ( Figure 3-5 ). The red dot on the submenu key indicates that it is selected.
Note
In the case of a multi-carrier EVDO signal, the “Number of Carriers” setting can be
changed (setting it to a maximum of 5 carriers).
When the center frequency of a signal is entered directly (instead of giving Band
Class and Channel Number info), the instrument automatically determines the
most likely band class and its emission mask, according to the specified
frequency.
Figure 3-5. EVDO Spurious Emission
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