Chapter 3 WCDMA Non-Call Mode
RF Analyzer for spectrum
96 WCDMA Options Version 6.20
Reading the results Chan Pwr — Display field for the channel power measured in dBm.
OBW — Display field for the occupied bandwidth determined in MHz. The value
displayed in this field must not exceed 5 MHz in order to achieve a “Passed“ test
verdict.
Markers
The 4400 offers two markers for easy reading of the graphical displays. On the
input fields in the first column you set the markers to the required horizontal
positions. The corresponding result fields in the next column shows the measure-
ment values obtained for the respective positions. In the display field below the
two marker fields the distance between the two markers set is displayed. See
following figure.
In this example the occupied bandwidth is 4.17 MHz and accordingly the test
verdict displayed in the Test field reads “Passed“. Should the values measured for
the UE not comply with the specified requirements, the test verdict will read
“Failed“. The display shows the average, minimum and maximum results graph in
different colours. You can display and hide minimum and maximum results using
the
MIN-MAX ON/Off softkey. For details on the usage of softkeys see “Softkeys
of the RF Analyzer” on page 102.
ACLR (Adjacent Channel
Leakage Power Ratio)
This measurement determines the ratio of the spectral power in the neighbouring
channels to the power in the allocated channel. The purpose of this measurement
is to verify that the ACLR value does not exceed WCDMA limits and to ensure
thereby that the mobile’s modulator does not create sideband emissions that
would then disturb transmission on adjacent traffic channels. According to
WCDMA specifications the measurement should be taken with the UE transmit-
ting at maximum transmit power, which in terms depends on which of the four
power classes the phone belongs to (see also Table 11 on page 94). The 4400,
however, allows this measurement at any transmit power level.
To Next Page
Loading...
