Anritsu BTS Master MT8221B, User Manual

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8-4 W-CDMA EMF Menu EMF (Option 444)
8-14 PN: 10580-00234 Rev. V 3GPP MG
Measurement Results (W-CDMA)
The measurement starts by setting the antenna’s X axis and capturing over-the-air data. If a
sync signal is found and there is a valid scrambling code, the PCPICH and Channel Power in
5 MHz bandwidth are stored. This is repeated for Y and Z axes. If any one of the axes has a
valid scrambling code, the isotropic result (for example,
(PCPICH
2
X
+ PCPICH
2
Y
+
PCPICH
2
Z
)
0.5
) for each of the above parameters is displayed as the Actual result.
The PCPICH Actual, Total Max, and Avg/Meas parameters are displayed as fixed columns in
the measurement results table. See
Figure 8-13 . Total Max is the max value computed from
all measurements completed thus far within the measurement period (Measurement Time ×
Number of Measurements). Avg/Meas is the running average of the isotropic results
computed from all measurements completed thus far within the specified Measurement Time.
Using the Display Params submenu, you can select the computed result to display in the
rightmost table column. Refer to
“Display Menu” on page 8-13 .
There is no axis dwell time parameter. If a sync signal is not found within a specific time,
data for the current axis is excluded and the instrument switches to the next axis.
The Field Strength number is the measured Channel Power in a 5 MHz bandwidth.
If the extrapolation factor is turned On, the E
max
value is the extrapolated PCPICH for Total
Max, Total Min, Total Avg, or Avg/Meas, and is computed as follows:
E
max
= E
pcpich
× √ k
where E
pcpich
is the root sum square (rss) value of the common pilot signal recorded in each
axis and k is the extrapolation factor provided by the network operator. For example:
E
max (pcpich total max)
= E
pcpich total max
× √ k
Figure 8-13. W-CDMA EMF Measurement Results