Table of Contents
Advertisement
JD780A Series Analyzers
Procedure
1.
Press the LIMIT hot key.
2.
Press the RF 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
Channel power
Occupied bandwidth
Spectrum emission mask
ACLR
Multi-ACLR
Spurious emissions
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.
Conducting power vs. time measurements
The Power vs. Time measurement measures the modulation envelope in the time domain, showing the
signal rise and fall shape of LTE signal and the power of each time slot in an LTE signal.
Power vs. time (slot)
The Power vs. Time (Slot) in LTE - TDD Signal Analyzer measures the modulation envelope in the
time domain, showing the signal rise and fall shapes of LTE signal.
NOTE
In this measurement, desirable level of the input power is lower than -10 dBm. If the input
power to be measured is -10 dBm or higher, it is highly recommended that you use an
external attenuator.
Setting measure setup
After configuring test parameters as described in the "Configuring test parameters" on page 265, you
can continue your measurement. The measurement settings can be saved and recalled as a file.
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: 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz, or 20 MHz.
3.
To select the slot number to be measured, complete the following steps:
280
Select
Channel Power
Occupied BW
Spectrum Emission Mask
ACLR
Multi-ACLR
Spurious Emissions
Using LTE – TDD Signal Analyzer
Set
High Limit
Low Limit
High Limit
(On/Off only)
(On/Off only)
(On/Off only)
(On/Off only)
Advertisement
Table of Contents
