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External
External
GPS
GPS
GPS
Conducting spectrum measurements
Setting measure setup
After configuring test parameters as described in the "Configuring test parameters" on page 234, 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:
a
Press the Bandwidth soft key.
b
Select the bandwidth option from the choices: 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz,
and 20 MHz.
3
To select the subframe number to be measured, complete the following steps:
a
Press the Subframe No soft key.
b
Enter a value by using the numeric keys. You can also use the rotary knob.
c
Press the Enter soft key.
4
Toggle the Cell ID soft key and select Auto or Manual as desired:
–
Auto: Lets the instrument detect the Cell ID for the LTE signal automatically.
–
Manual: Sets a specific Cell ID for the LTE signal manually in order to speed up the
synchronization with a BTS.
Your measurement result is displayed on the screen as like the following example, Figure 112.
The green EXT icon indicates that an external reference is connected
(green)
and locked and that the instrument uses the same reference clock as
the signal source.
The red EXT icon indicates that an external reference is connect but not
(red)
locked.
(green)
The green GPS antenna icon indicates that a GPS antenna is
connected and locked.
(yellow)
The yellow GPS antenna icon indicates that a GPS antenna is
connected and locking is in progress.
(grey)
The grey GPS antenna icon indicates that a GPS antenna is not
connected, failed, or unable to be locked.
JD700B Series User's Guide
Chapter 9 Using LTE - TDD Signal Analyzer
239
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