Environmental Characteristics; Operating Environment; Heat Dissipation - Ericsson 4408 Description

10/3/23, 11:57 AM
Table 5 Maximum Sound Pressure Level (dBA) for Street Radio 4408 with Integrated Fan
Temperature (°C)
<+20
+30
+40
+55
(1) The sound pressure level is measured at hemispherical distribution.
3.8

Environmental Characteristics

This section contains operating environment data for the radio.
3.8.1

Operating Environment

The following are the values for the normal operating environment of the radio:
Table 6 Operating Environment
Description
(1)
Temperature
Solar radiation
Relative humidity
Absolute humidity
Maximum temperature change 0.5°C/min
Maximum wind load at 42 m/s (pole-installed single unit)
Street Radio 4408 B77G
(1) Depending on product variant, installation scenario, traffic load, and configuration, the product can, in the highest 15°C temperature range,
temporarily reduce the output power by <2 dB. This depends on the durations of the high ambient temperature.
3.8.2

Heat Dissipation

The radio has a fan and is designed for outdoor installation.
Avoid indoor installation in a room without sufficient ventilation and cooling.
The maximum heat dissipation is calculated using the following formula:
Max Heat Dissipation = Max Power Consumption − Configured Output Power
Heat dissipation can be calculated for different traffic loads using values from Power Consumption Data. For more
information, see Power Consumption Calculations.
3.8.3 Vibration
The radio operates reliably during seismic activity as specified by test method IEC 60068-2-57 Ff.
Table 7 Street Radio 4408 Seismic Vibration Activity
Characteristic
Maximum level of Required Response Spectrum (RRS) 50 m/s
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Value
−40°C to +55°C
≤1120 W/m²
5–100%
3
0.26–40 g/m
72 N (front/back), 88 N (side)
Value
Radio Description
Street Radio 4408 Sound Pressure Level (dBA) at 1-meter
(1)
Distance
41.0
44.0
47.0
52.0
2
within 2–5 Hz for DR=2%
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