Setting Limit For Modulation Tests; Performing Auto Measurements - JDS Uniphase CellAdvisor JD780A Series User Manual

JD780A Series Analyzers

Setting limit for modulation tests

Procedure
1.
Press the LIMIT hot key.
2.
Press the Modulation Test Limits soft key.
3.
Select the test item(s) and set the limit(s) depending on your selected measurement mode:
To set the limit for
Frequency error
Error vector magnitude rms
Peak code domain error
Highest level among inactive channels
4.
Optional. You can enable alarm sound that goes off if the measurement falls outside of the limit.
Toggle the Beep soft key between On and Off to enable or disable the beep sound.
5.
Optional. Go to SAVE/LOAD > Save, and then select Limit to save the limit settings.
See "Using save" on page 31 for more information.

Performing auto measurements

The Auto Measure function of the JD780A series allows a complete signal profiling covering RF
characterization and modulation quality parameters of up to 10 different carriers, particularly useful on
an overlay architecture where base stations are transmitting in different frequencies.
The Auto Measure can be easily executed either by selecting a menu in the instrument or by running a
programmed scenario in the PC-based application so that the instrument automatically configure and
perform tests on every aspect of all the carriers.
Setting limit
You can set test limits for test item(s) in the auto measurement.
Procedure
1.
Press the LIMIT hot key.
2.
Press the RF Test Limits soft key, and then enable test limits as desired.
3.
Press the PvsT Test Limits soft key, and then enable test limits as desired.
4.
Press the Modulation Test Limits soft key, and then enable test limits as desired.
5.
Optional. You can enable alarm sound that goes off if the measurement falls outside of the limit.
Toggle the Beep soft key between On and Off to enable or disable the beep sound.
6.
Optional. Go to SAVE/LOAD > Save, and then select Limit to save the limit settings.
See "Using save" on page 31 for more information.
Setting measure setup
After configuring test parameters as described in the "Configuring test parameters" on page 415, you
can continue your measurement. The measurement settings can be saved and recalled as a file. You
442
Select
Frequency Error
EVM RMS
PCDE
Max Inactive
Using TD-SCDMA Signal Analyzer
Set
High Limit
Low Limit
High Limit
High Limit
High Limit