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Dali Matrix PS System Installation and Commissioning Guide
Dali Wireless Proprietary and Confidential | DW-MAN-036 Rev 06
The antenna connected to the product is specific to the deployment. The worst case scenario
occurs when using a very high gain antenna. However a typical indoor antenna is shown in the
following example:
The highest conducted output power is 37 dBm. To avoid exceeding 37 dBm ERP, the unit output
power can be backed off to 34 dBm. With an indoor antenna gain of 3 dBi, the EIRP is 37 dBm.
The maximum power density safe exposure level for general population/uncontrolled exposure of
30 minutes for the frequency of 152 MHz is 0.2 mW/cm
2
.
Conducted Output
Power (dBm)
Max Antenna
Gain (dBi)
Max EIRP (mW)
Power Density Limit
Allowed (mW/cm²)
Safe Distance
(cm)
34
3
5012
0.2
45
As shown above, the minimum s a f e distance where the MPE limit is reached is 45 cm from
with a 3 dBi antenna and no distribution loss.
If the antenna will be positioned closer to end users than 45 cm, then the installer must calculate
the safe distance for a given installation using the formulas provided.
450 MHz Band, Mode A (2 W)
In the Frequency Range of 300 to 1500
MHz, the maximum power density limit for the
occupational/controlled exposures is f/300 mW/cm
2
for an average time of 6 minutes. In the
Frequency Range of 300 to 1500 MHz, the maximum power density limit for the general
population/uncontrolled exposures is f/1500 mW/cm
2
for an average time of 30 minutes.
The antenna connected to the product is specific to the deployment. The worst case scenario
occurs when using a very high gain indoor/outdoor antenna. However a typical indoor antenna is
shown in the following example:
The highest expected output power is 34 dBm at 481MHz. For an output level of 34 dBm with an
indoor antenna gain of 2 dBi, the EIRP is 36 dBm.
The maximum power density safe exposure level for general population/uncontrolled exposure of
30 minutes for the frequency of 481 MHz is 0.321 mW/cm
2
.
Conducted Output
Power (dBm)
Max Antenna
Gain (dBi)
Max EIRP
(mW)
Power Density Limit
Allowed (mW/cm²)
Safe Distance
(cm)
34
2
3981
0.321
32
As shown above, the minimum safe distance where the MPE limit is reached is 32 cm from the
unit with a 2 dBi antenna and no distribution loss.