Test background

The comrades who passed through the Wenzhou monitoring station have monitored the use of the 1.4G frequency, but have not registered the frequency, which is an illegal use of the frequency.  

Test process one:

By using the automatic direction-finding and positioning antenna on the "Shark" vehicle to find the direction, no signal was received at first, and a weak signal of about -110dBm can be seen along the station road south to Jinxiu Road. At this time, the location of the device's automatic direction finding is about 1 km south of the station road. Judging from the signal strength and direction finding results, this result is unreliable. However, it can be determined that the direction of arrival of the signal is the south, and you can continue to search south.  

Test process two: 

Continue to drive to the vicinity of Wenzhou Station, the positioning given by the meter is along the light rail line south of Wenzhou Station. And the signal level value is -75dBm.

After testing around this point, the heatmap shows that there are two anchor points. Both locations are along the light rail line.

Test process three: 

Replace the handheld directional antenna to verify this point.

It can be clearly seen that there is an antenna on the light rail, and the handheld antenna is facing the position of the light rail transmitting antenna. The signal strength is very large, close to -40dBm. After the coordination of the committee, it was confirmed that the signal was occupied by the light rail.

Summary: 

Through the automatic positioning function of "Shark", the transmitting antennas of the two sectors of the 1.4GHz TDD-LTE co-frequency network can be successfully found.

More illegal platform search cases are as follows. If you need to know related cases, please contact our sales, thank you.

Illegal platform search- Hangzhou 1.4G search