JDS Uniphase CellAdvisor JD780A Series, User Manual

Page: 461 / 592

JD780A Series Analyzers
Using Mobile WiMAX Signal Analyzer
461
Conducting spectrum measurements
Setting measure setup
After configuring test parameters as described in the
“Configuring test parameters” on page 456, 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:
a. 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
b. Toggle the Frame Length soft key and select 5 ms or 10 ms .
c. 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.
d. Enter a value by using the numeric keys, and then press the Enter soft key.
e. Press the CP Ratio soft key, and then select the cyclic prefix ratio option: 1/4 , 1/8 , 1/16 , or
1/32 .
f. Press the DL Symbols soft key to set the number of downlink symbols.
g. Enter a value by using the numeric keys, and then press the Enter soft key.
h. Press the UL Symbols soft key to set the number of uplink symbols.
i. Enter a value by using the numeric keys, and then press the Enter soft key.
3.
Optional . To set the delay, complete the following steps:
a. Press the Delay soft key to set the amount of delay in µs.
b. Enter a value by using the numeric keys. You can also use the rotary knob.
c. Press the µs soft key.
NOTE
The Delay setting is used only when there is a time offset in the signals to be measured.
Your measurement result is displayed on the screen as like the following example, Figure 230.