Anritsu BTS Master MT8221B, Руководство пользователя

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8-3 LTE/TD-LTE EMF Menu EMF (Option 444)
8-2 PN: 10580-00234 Rev. V 3GPP MG
8-3 LTE/TD-LTE EMF Menu
Key Sequence:
Measurements > Over-the-Air > EMF
Measurement On/Off: Starts the EMF Measurement and removes access to
all other menu buttons. The measurement turns On only if the Center
Frequency is set within the valid range and the Anritsu Isotropic Antenna is
connected.
Note that the Measurement Time and other related parameters must be set
before starting the measurement. This button is useful for stopping or
restarting measurements when settings need to be changed. When the
measurement is in progress, access to other menus and key presses are
blocked.
Measurement Time: Sets the duration of each EMF measurement from one
minute up to 30 minutes. The default is 6 min. The instrument captures
over-the-air data for the X axis when a valid sync signal is found and a valid
Cell ID exists, then moves to the Y and Z axes. There is no axis dwell time
parameter. You will get as many isotropic results for the set of three axes as
can be obtained within the specified Measurement Time.
When no valid sync signal is found for the current axis, data captured for this
axis will be excluded from the measurement results and the instrument moves
to the next axis. Refer to
“Measurement Results (LTE/TD-LTE)” on page 8-7 .
Number of Measurements: Sets the number of EMF measurements to
complete from 1 up to 10,000. The EMF test is fully executed when the
specified number of measurements have completed.
Auto Logging On/Off: Auto Logging is On by default. This must be selected
prior to starting the measurements for the results to be logged. The average,
max, and min values of each isotropic set of three axes, the isotropic trace
data, and the computed total average, max, and min values are saved in a tab
delimited text file in internal memory.
The location of this log file is a new folder named with the current time stamp
followed by _1, and created in “/Internal Memory/EMF/”. The folder can hold
100 files. Each file holds five measurements. The 101
st
file and the files
created thereafter are stored in a new folder with the same time stamp as the
first, followed by _2 (then _3, and so on). Each file has its own time stamp.
Measurement Parameters: Opens the “Meas Params Menu (LTE/TD-LTE)”
on page 8-3 .
EMF Units: dBm/m
2
, V/m, and W/m
2
are the currently supported units. V/m is
the default unit.
Limits: A single number can be entered. The Field Strength (Avg) value is the
running average for the current Measurement Time and should stay below
this limit (default 6 V/m) for the test to pass. When the Extrapolation Factor is
On (refer to
“Meas Params Menu (LTE/TD-LTE)” on page 8-3 ), the Field
Strength (Avg) is extrapolated and the computed value should stay below the
limit for the test to pass.
Back: Returns to the previous menu.
Figure 8-2. LTE/TD-LTE EMF Menu
EMF
Measurement
On Off
EMF Units
dBm/m
2
V/m W/m
2
Number of
Measurements
5
Measurement Time
6 min
Auto Logging
On Off
Limits
20.0 dBm/m 2
Measurement
Parameters
Back