MICRONIX

Actual measurement example of ETC/ITS spot using the signal analyzer

The burst signal of ETC/ITS spot is certainly capt ured using real time mode and trigger function.

[Application]

Since the interval of burst signal of ETC / ITS spot is very short, a spectrum analyzer by sweep system can not measure the signal well.
If the real time mode of signal analyzer MSA500 series is used, any spectrum will not be misse.

[Solution]

Spectrum measurement
[ Power trigger & MaxHold functions ]
Photo:2 channel signals of ETC roadside unit (579
5 & 5805MHz
*2 channel signals of ETC roadside unit (579 5 & 5805MHz)
Spectrogram analysis
[ Spectrogram ]
X axis is time(frame),Y axis is frequency and Z axis i s power (displayed by color).
By display by three dimensions, the time response of signa l can be analyze
Photo:5795MHz of ETC roadside unit (ASK sign al)
*5795MHz of ETC roadside unit (ASK sign al)
Time domain analysis ※ SPAN:20MHz@all images
①[ "Power vs time" & "Spectrogram" of ASK signal ]
Photo:Power vs time and  Spectrogram of ASK signal
*The time response of the transmission signal of the ETC roadside unit generated in burst and modulated by ASK is o bserved.
②[ "Power vs time" & "Spectrogram" of QPSK signal ]
Photo:
*The average transmission power can be determined from ”power vs time” analysis of QPSK signal at ITS spot.
③ ["Phase vs time" & "Spectrogram" of QPSK signal ]
Phase vs time and Spectrogram of QPSK signal
*The time response of the transmission signal of the ITS spot generated in burst and modulated by QPSK is observed.
Figure:ITS spot

[System configuration]

Handheld signal analyzer[MSA558] x 1

*MICRONIX Corporation reserves the right to make changes in design, specification and other information without prior notice.

[Products introduction]

2013/7

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