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Analog transmitter

Manufacturer: SSM
5 185,19 ₽
The search transmitter is designed to be installed on light unmanned aircraft in order to detect the latter in cases of emergency landings
Availability: 1 in stock
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The search transmitter:

  • referred to as "Mayak" is designed to be installed on light unmanned aircraft (UAV) in order to detect the latter in cases of emergency landings;
  • is a fully Autonomous device with an independent power source;
  • works in a set with any type of wearable radio stations (transceivers) on the range of 144-159 MHz;
  • emits a short pulse radio signal on the main operating and two side frequencies;
  • the power emitted by the beacon does not exceed 10 mW and does not require special permits for operation;
  • beacon radiation does not affect the operation of on-Board electronic, navigation and radio equipment;
  • on-Board equipment, including radio-emitting equipment, does not affect the operation of the beacon;
  • powered from a direct current source with a voltage from 2.5 V to 3.2 V (AG3 battery);
  • the range of the beacon strongly depends on the terrain, the location and orientation of the antenna after an emergency landing and the height of the location above the ground;
  • the range of the beacon decreases as the power supply voltage decreases

Search algorithm:

  • reception of beacon signals is carried out by a portable radio station tuned to the main operating frequency;
  • the radio station must be in reception mode with the noise canceller turned on;
  • the beacon signal is listened to in the radio station as short dull clicks with a period of 1.2 – 1.3 seconds;
  • at large distances, you may need to turn off the radio station's noise canceller to detect the beacon signal. In this case, clicks are listened to as short changes in the noise volume with the above period;
  • the principle of detecting a beacon is based on shading the beacon signal with the body of the search engine, for which the radio antenna is pressed against the chest of the search engine;
  • at large distances, the radio station turns off the noise canceller. The search engine needs to achieve reliable reception of a signal and slowly turn 360 degrees. You need to find the position of the body where the beacon signal is lost. In this case, the beacon is located behind the search engine;
  • moving in the direction of the lighthouse, you need to achieve a confident signal reception with the radio station's noise canceller turned on and turning 360 degrees again to clarify the direction to the lighthouse;
  • when approaching the lighthouse, you must constantly specify the direction by finding the position of the body in which the beacon signal is lost;
  • at small distances, the signal level from the beacon increases to values at which the radio station's antenna ceases to be shaded by the search engine's body. To continue searching, you need to shift the radio station setting in 5 KHz increments in the direction of increasing or decreasing the frequency. This reduces the level of reception several times. If necessary, the offset can be made in two steps (5 KHz each);
  • in the immediate vicinity of the beacon (hundreds or tens of meters), the signal level is highest and to determine the direction to the beacon, it may be necessary to disconnect the radio station antenna together with the offset of the reception frequencies, as well as to turn on and off the noise canceller.

With proper use of a portable radio station, the beacon can be detected "blindly" at arm's length and find the UAV.

Products specifications
Weight (g)2
Diameter (mm)9,2
Antenna length (mm)305-320
Operating frequency (MHz)144 - 159
Duration of radiation (ms)80 - 100
Repetition period of the radiation pulse (ms)1200 - 1300
Range on the ground with the noise canceller turned off (km)up to 7
Range on the ground with the included noise reduction (km)up to 2
Range over the air with the noise canceller turned off (km)up to 12
Range by air with noise canceller enabled (km)5
Minimum supply voltage (V)2.5
Maximum current consumption (mA)1
Weight with power supply (g)4.5
Minimum duration of operation from two AG3 batteries (hours)up to 26