Chapter 13
Using Mobile WiMAX Signal
Analyzer
JD700B Series User’s Guide
477
Measurement example
Figure 284 Occupied bandwidth measurement with Mobile WiMAX signal analyzer
NOTE
You can use the
LIMIT
hot key to analyze your measurements with the user-definable
limit and Pass/Fail indication. See “Setting limit for RF tests” on page 480 for more
information.
Spectrum emission mask (SEM)
The Spectrum Emission Mask (SEM) measurement compares the total power level within the defined carrier
bandwidth and the given offset channels according to the standards.
Setting measure setup
After configuring test parameters as described in the “Configuring test parameters” on page 468, you can
continue your measurement.
Procedure
1
Press the
MEASURE SETUP
hot key.
2
Press the
System Config
soft key, and then do the following:
Press the
Bandwidth
soft key, and then select the nominal channel bandwidth to be
measured from the following choices:
7 MHz (8/7):
Sets the channel bandwidth to 7 MHz with sampling factor 8/7. In
conjunction with nominal channel bandwidth
8.75 MHz (8/7):
Sets the channel bandwidth to 8.75 MHz with sampling factor 8/7
10 MHz (28/25):
Sets the channel bandwidth to 10 MHz with sampling factor 28/25
Toggle the
Frame Length
soft key and select
5 ms
or
10 ms
.
Press the
TTG (RTG)
soft key to set the transmit/receive transition gap between the last
sample of the downlink burst and the first sample of the subsequent uplink burst.
Enter a value by using the numeric keys, and then press the
Enter
soft key.
Press the
CP Ratio
soft key, and then select the cyclic prefix ratio option:
1/4
,
1/8
,
1/16
, or
1/32
.
Press the
DL Symbols
soft key to set the number of downlink symbols.
Enter a value by using the numeric keys, and then press the
Enter
soft key.