JDS Uniphase CellAdvisor JD780A Series, Руководство пользователя

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JD780A Series Analyzers
Using LTE - FDD Signal Analyzer
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3.
Enter a value between 1 and 100 as needed by using the numeric keys.
4.
Press the Enter soft key.
Setting sweep mode
The default setting is Continue to sweep continuously for most on-going measurements. If you want to
hold the measurement or get a single sweep, you can change the sweep mode.
Procedure
To select the single sweep mode:
1.
Press the SWEEP hot key.
2.
Toggle the Sweep Mode soft key and select Single . You can also use the HOLD hot key.
The letter HOLD in red appears and the sweeping is paused.
3.
Optional . Press the Sweep Once soft key to get a new measurement.
To return to the continuous sweep mode:
1.
Toggle the Sweep Mode soft key and select Continue . You can also use the HOLD hot key.
The letter HOLD in red disappears and the sweeping resumes.
Setting trigger source
You can set the trigger source option for your measurements.
Procedure
1.
Press the TRIGGER hot key.
2.
Select the trigger source option from the following choices: Internal , External , or GPS .
Setting external clock
To enhance the reliability of modulation analysis measurements the JD780A series must be
synchronized with a base station. When an external clock is not supplied, the instrument works with its
built-in internal high-accuracy time base and some measurement results may exhibit inaccurate values.
Therefore, it is highly recommended that you use the same reference clock as the signal source. You
can use the
TRIGGER hot key to set the external clock.
Figure 81 Connection ports for external reference clock