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DPL-400 Direction Finder Localizer for Detecting Relay Station Walkie-Talkie Location Tour Pal Maritime Tracking Rescue Cheating Hunting
Description:
- Measurement principle: Doppler effect
- Measurement frequency range: 300-800MHz
- Measurement mode: any mode (as long as the receiver can receive,position can be measured)
- Measurement accuracy:
Horizontal direction: 10 degree
Vertical direction: about 20 degree
- Direction finder antenna: Left and right two dipole antennas (two antennas up and down to form a dipole antenna)
When the left and right two antennas are placed vertically, the horizontal polarization when the horizontal polarization
- Come with 5v/1200mAH power supply
- Power supply: DC 5V (USB interface power supply)
- Power consumption: less than 50mA
- Built in 1KHz audio modulation signal, used to determine the direction
- Output interface: SMA head (SMA-J)
- SMA header can only be connected to the receiver, can not be transmitted
- Without receiver
Applications:
find the relay station of the interference source; school radio direction finding game;cheating in exams to find emission source; wireless wiretapping; Take photoes in secret; toul pal missing; search launcher, etc.
Usage:
When the left and right two dipole antennas distance is equal to the emission source's, the internal 1KHz modulation signal disappears. And the emission source is on the axis of symmetry of the two antennas. It is not difficult to see that the source is measured in a straight line, as far as the direction of this line can not be judged. Therefore, it is needed to be placed again to measure the straight line. The intersection of the two straight lines is the position of the measured emission source, and then drive to the vicinity of the exact search can be. As far as possible to find an open place to avoid the refraction of the walls and other obstacles caused by false judgment, as far as possible to make the antenna far away from the human body, to avoid human interference caused by false judgments. When in use, the two antennas can be placed vertically or horizontally, and when the signal is strong, the polarization mode of the measured transmitting source is the same as that of the direction finder antenna.
Package included:
- 1 x DPL-400 Direction Finder
