When measuring the electric field strength by placing a signal analyzer MSA500 series or ETC/DSRC electric field strength measurement system ME 9200 in a car, the measurement position can be identified using the vehicle speed pulse.
The field intensity of signal optical wave output after mixing is proportional to the square of the sum of LO optical wave's field intensity, from which the difference-frequency signal between LO optical wave and signal optical wave can be selected out.
Measure the electric field strength distribution of the roadside unit installed on the ETC gate of the highway accurately and in short time with the CW wave or the operation wave.
Since the spectrum analyzer can measure the strength and frequency of the voltage, if you know the antenna factor, you can know the electric field strength and frequency of the radio wave at the position where the antenna is placed.
After measuring the electric field strength distribution of the ETC/ITS spot with operation wave or CW wave in a short time, the electric field strength graph and the map diagram are created.
Therefore, dBmeirp is used as the unit of electric field strength in DSRC communication unit ME9115 and ETC/ITS spot electric field strength measurement system ME9200 which are our products.
Practical Measurement Considerations The tables in this application note give approximate values for measured power and voltage as a function of specifications such as field strength and EIRP.
The specification includes the field-strength requirements for the RF field, the signal definition for transferring data from one device to the other, and sensitivity requirements to receive data from a remote NFC device.
The VNA Master+ Spectrum Analysis includes many standard measurement sequences, including field strength, occupied bandwidth, channel power, adjacent channel power ratio, and carrier to interference(C/I) ratio.
Electric field strength measurement method[Measurement by handcart] Measure the electric field strength distribution of the roadside unit installed on the ETC gate of the highway accurately and in short time with the CW wave or the operation wave.
As the notation in decibel(dB) which is the logarithmic unit is often used in the spectrum analyzer, it is often that the antenna factor is in dB units or the electric field strength is also used in dB units.
However, it is not necessary to use the electric field strength measurement mode if the unit of standard is dBm or W. It is better that the receiving power is measured in the cha nnel power measurement mode because the antenna gain changes little at the span 100MHz.
However, it is not necessary to use the electric field strength measurement mode if the unit of standard is dBm or W. It is better that the receiving power is measured in the channel power measurement mode because the antenna gain changes little at the span 100MHz.
The electric field strength distribution of the roadside unit installed on ETC gate, main line or ITS spot on the highway can be easily measured with the operation wave while traveling by normal speed(100 km/ h or less).
Since the antenna calibration data of M401 to M407 is installed beforehand in the spectrum analyzer MSA400 series, the electric field strength can be measured easily in the combination of our spectrum analyzer and dipole antennas.
Measurement by in-vehicle The electric field strength distribution of the roadside unit installed on ETC gate, main line or ITS spot on the highway can be easily measured with the operation wave while traveling by normal speed 100 km/ h or less.
As the notation in decibel(dB) which is the logarithmic unit is often used in the spectrum analyzer, it is often that the antenna factor is in dB units or the electric field strength is also used in dB units.
The VNA Master+ Spectrum Analyzer includes many one-button standard measurement sequences, including field strength, occupied bandwidth, channel power, adjacent channel power ratio, and carrier to interference(C/I) ratio.
For instance, a product has a duty-cycle profile that permits a peak field strength at 315MHz that is 10dB higher than the FCC average field strength, then the peak field strength can now be 19.1μV/meter, or 85.6dBμV/meter.
Contactless transmission of data and supply energy Operating frequency of 13.56 MHz Data transfer of 106 kbit/s Data integrity of 16-bit CRC, parity, bit coding, bit counting Operating distance up to 100 mm depending on various parameters as e.g. field strength….
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