JDS Uniphase CellAdvisor JD780A Series, Руководство пользователя

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JD780A Series Analyzers
Using LTE - FDD Signal Analyzer
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2.
Toggle the IQ Diagram soft key between On and Off to display or dismiss data on the IQ
diagram for each component carrier.
3.
Press the Channel soft key to select the channel to be displayed on the IQ diagram.
4.
Use the rotary knob to move and select an item under EVM.
Conducting LTE - FDD OTA measurements
The FDD LTE Over The Air (OTA) measurement has Channel Scanner, ID Scanner, Multipath Profile,
Datagram, and Control Channel screens. The ID Scanner displays key parameters such as RSRP,
RSRQ, RS-SINR, and S-SS RSSI. The Multipath Profile enables you to determine RF environmental
conditions of testing area. The OTA Control Channel provides summary of all control channels
including RS power variation over time.
Channel scanner
The Channel Scanner is a radio receiver that can automatically tune or scan two or more discrete
frequencies and multi-channels, indicating when it finds a signal on one of them and then continuing
scanning when that frequency goes silent.
Setting channel/frequency
Procedure
To set the channels to be scanned:
1.
Press the FREQ/DIST hard key.
2.
Toggle the Unit soft key and select Channel .
3.
Press the Index soft key, and then enter an index number between one and six by turning the
rotary knob or using the numeric keys.
4.
To select the standard channel, complete the following steps:
a. Press the Channel Std soft key. The standard channel window appears.
See
“Appendix C – Band, frequency & channel standard” on page 571 for more information.
b. Select the band to be measured by using the rotary knob, the arrow keys, or the Page
Up/Page Down soft keys.
c. Press the Select soft key or the rotary knob to confirm the selection.
5.
To set the channel number for the selected index, complete the following steps:
a. Press the Channel Number soft key.
b. Enter a value by using the numeric keys. You can also use the rotary knob.
c. Press the Enter soft key.
The instrument displays a corresponding center frequency for the channel number.
6.
To set the integration bandwidth for the selected index, complete the following steps:
a. Press the Integration Bandwidth soft key.
b. Enter a value by using the numeric keys. You can also use the rotary knob.
c. Select the unit: GHz , MHz , kHz , or Hz .
7.
To add more channels to be scanned, repeat steps 3-6 .
8.
Press the ESC hard key to dismiss the channel list window and view the scanning result.