New search

TETRA handset

Belongs to:
TETRA
Synonyms:
TETRA hand portable
Description:

TETRA handsets are divided into the following power classes:
class 1: P = 30 W
class 2: P = 10 W
class 3: P = 3 W
class 4: P = 1 W

Frequency ranges:
  • 870–876 Hz (for the uplink)
  • 385–390 MHz (Europe-wide for the TETRA-POL uplink)
  • 395–400 MHz (Europe-wide for the TETRA/BOS downlink)
  • 410–420 MHz (for the uplink)
  • 420–430 MHz (in the downlink)
  • 450–460 MHz (for the uplink)
  • 460–470 MHz (in the downlink)
  • 915–933 MHz (in the downlink)
Type of field:
electromagnetic

Measurements (acc. to literature)

Measurand Value Feature Remarks
power density 3 µW/m² (measured) - in rural areas of Sweden; measurement comprise both hand radio sets and base stations [1]
power density 5.4 µW/m² (measured) - in urban areas of Sweden; measurements comprise both hand radio sets and base stations [1]
power density 6 µW/m² (measured) - in the capital of Sweden (Stockholm); measurements comprise both hand radio sets and base stations [1]
BOS
Measurand Value Feature Remarks
electric field strength 0.35 V/m (maximum) - comparison of total fields along the vertical axis 20 cm in front of headset for monopole antenna [2]
electric field strength 95 V/m (maximum) - comparison of total fields along the vertical axis 10 cm in front of headset for monopole antenna [2]
SAR 400 mW/kg (maximum) - maximum value in the head, averaged over 10 g, Motorola MTP 300 [3]
SAR 0.24 W/kg (maximum) - averaged over 10 g, positioned before the face, class 4 device [4]
SAR 0.53 W/kg (maximum) - averaged over 10 g, positioned in front of the face, class 3 device [4]
SAR 0.88–0.89 W/kg (maximum) - averaged over 10 g, positioned at the ear, class 4 device [4]
SAR 1.3 W/kg (maximum) - averaged over 10 g, close to the antenna, calss 4 device [5]
SAR 1.63 W/kg (measured) - averaged over 10 g of tissue at the right cheek for a monopole antenna [2]
SAR 2.24 W/kg (maximum) - averaged over 10 g at the right cheek for a helix antenna [2]
SAR 2.33–2.88 W/kg (maximum) - averaged over 10 g, positioned at the ear, class 3 device [4]
SAR 1.3 W/kg (maximum) - averaged over 10 g of tissue while positioning the handset next to the left ear so that the antenna lies within a few mm from the head [5]
SAR 2.78 W/kg (maximum) - averaged over 10 g of tissue; position of the feeding cable: 5mm from the back, 5 mm above the head; distance to the antenna: 30 mm [6]
SAR 3.87 W/kg (maximum) - averaged over 10 g of tissue; position of the feeding cable: 5mm from the back, 5 mm above the head; distance to the antenna: 20 mm [6]
SAR 3.87 W/kg (maximum) - averaged over 10 g of tissue; position of the feeding cable: 10 mm above the head; distance to the antenna: 20 mm [6]
SAR 3.91 W/kg (maximum) - averaged over 10 g of tissue; position of the feeding cable: 10 mm from the back; distance to the antenna: 20 mm [6]
SAR 5.22 W/kg (maximum) - averaged over 10 g of tissue; position of the feeding cable: 5mm from the back, 5 mm above the head; distance to the antenna: 10 mm [6]
SAR 6.05 W/kg (maximum) - averaged over 10 g of tissue; position of the feeding cable: 5 mm from the back, 5 mm from above the top of the head; distance to the antenna: 5 mm [6]
SAR 6.05 W/kg (maximum) - averaged over 10 g of tissue on a liquid phantom [6]
SAR 6.06 W/kg (maximum) - averaged over 10 g of tissue; position of the feeding cable: 10 mm from the back; distance to the antenna: 5 mm [6]
power 250 mW (mean) - mean radiated power [5]
power 0.25–0.75 W (maximum, measured) - maximum time averaged transmit power [7]
power 1–3 W (maximum, measured) - maximum peak transmit power [7]

References

  1. Estenberg J et al. (2014): Extensive frequency selective measurements of radiofrequency fields in outdoor environments performed with a novel mobile monitoring system.
  2. Dimbylow P et al. (2003): Assessment of specific energy absorption rate (SAR) in the head from a TETRA handset.
  3. Green AC et al. (2005): An investigation of the effects of TETRA RF fields on intracellular calcium in neurones and cardiac myocytes.
  4. Doll R et al. (2001): Possible Health Effects from Terrestrial Trunked Radio (TETRA): Report of an Advisory Group on Non-Ionising Radiation.
  5. Nieto-Hernandez R et al. (2011): Can exposure to a terrestrial trunked radio (TETRA)-like signal cause symptoms? A randomised double-blind provocation study.
  6. Riddervold IS et al. (2010): No effect of TETRA hand portable transmission signals on human cognitive function and symptoms.
  7. Schmid G et al. (2012): Design and dosimetric analysis of a 385 MHz TETRA head exposure system for use in human provocation studies.