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JD780A Series Analyzers
Spectrum Replayer
The Spectrum Replayer lets you retrieve and replay recorded spectrum analyzer traces in interference
analysis mode. These traces can be played back in the spectrogram or RSSI. You can configure the
limit line to create failure points when signals exceed it. The failure points are clearly displayed on the
trace timeline for quick access during playback.
Setting measure setup
Procedure
1.
Press the MEASURE hot key.
2.
Press the Spectrum Replayer soft key.
The file manager window appears.
3.
Select a file to be loaded, and then press the Load soft key.
The Measure Setup screen menus appear.
4.
Toggle the Replay Direction soft key between FWD and REV to change play direction to forward
or reverse.
5.
Press the Replay Speed soft key, and then select the speed option: x1, x2, x3, and x4.
6.
Press the Play soft key to start playing.
7.
Press the Pause soft key to pause or stop playing data.
8.
To move to a particular failure position directly and play from there, complete the following steps:
a.
Press the Jump to Fail Index soft key.
b.
Enter a value by using the numeric keys.
c.
Press the Enter soft key.
9.
Optional. Toggle the Time Cursor soft key between On and Off to display or hide the time cursor
on the screen. This key becomes activated when you play logged data in the Spectrogram mode.
NOTE
If you connected a USB drive, do not remove it while playing. Doing so may freeze the
USB port, which will require you to restart the instrument to get a USB drive recognized
again.
Setting display
You can select the display option.
Procedure
1.
Press the TRACE/DISPLAY hard key.
2.
Select the display option: Spectrum, Spectrogram, or RSSI.
NOTE
You can use the LIMIT hot key to analyze your measurements with the display line, multi-
segment line, and channel limit. See "Setting limit for interference analyzer" on page 119
for more information.
Radar Chart
If you have identified an interfering signal on your spectrum view, you can move to the Radar Chart
mode and measure RSSI power level through 360 degrees at a location received by the connected
114
Using Interference Analyzer
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