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Chapter 14
Using NB-IoT Signal Analyzer
JD700B Series User’s Guide
507
Remove all the traces and initialize the trace
settings
More (1/2) > Trace
Clear All
NOTE
For the
Max Hold
and
Min Hold
, your instrument compares newly acquired data with the
active trace and displays larger maximum values or smaller minimum values on the
screen. You can set it to
Unlimited
to hold and view maximum or minimum data or
specify a certain amount of time up to 60 seconds by using numeric keys or rotary knob.
4
To select the detection option, select
More (1/2) > Detectors
, and then complete one of the
followings:
To display
Select
Random noise better than the peak without missing signals
Normal
The highest value in each data point
Peak
The root mean squared average power across the spectrum
RMS
The lowest value in each data point
Negative Peak
The center value in each data point
Sample
5
Optional
. Select
More (1/2) > Trace Info
, and then select the trace number to view the trace’s
parameter setting information stored at the time of the measurement or
None
to hide the
information display.
6
Optional.
If you have the two traces T1 and T2, you can perform trace math. To view the power
difference between the traces, press the
T1 – T2 -> T5
or
T2 – T1 -> T6
soft key.
The result is overlaid on the screen along with the second Y-axis.
Conducting NB-IoT in band modulation analysis
Setting measure setup
After configuring test parameters as described in the “Configuring test parameters” on page 502, you can
continue your measurement.
Procedure
1
Press the
MEASURE SETUP
hot key.
2
To set the nominal channel bandwidth to be measured, complete the following steps:
Press the
Bandwidth
soft key.
Select the bandwidth option from the choices:
1.4 MHz
,
3 MHz
,
5 MHz
,
10 MHz
,
15 MHz
, or
20 MHz
.
3
To select the subframe number to be measured, complete the following steps:
Press the
Subframe No
soft key.
Enter a value from 0 to 9 by using the numeric keys. You can also use the rotary knob.
Press the
Enter
soft key.
NOTE
You can use
Subframe No
soft key only if you toggle the
Measure Type
soft key and
select
Subframe
.
4
Press the
NB-IoT PRB Index
soft key.
5
Enter a value from 0 to 49 by using the numeric keys. You can also use the rotary knob.
The following is a table which defines PRB number values based on 3GPP standard. You can
refer to the setting value.
Содержание CellAdvisor JD700B Series
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