ETSI ETS 300 441, Инструкция по эксплуатации

Страница: 16 / 25

Page 16
ETS 300 441: February 1996
6.4.2 Requirement
The limit of the performance check shall be met.
There shall be no harmful deterioration of the equipment visible to the naked eye.
6.5 Damp heat test
6.5.1 General
The maximum rate of raising or reducing the temperature of the chamber in which the equipment is being
tested shall be 10°C/min.
6.5.2 Method of measurement
The equipment shall be placed in a chamber at normal room temperature and humidity which, steadily,
over a period of three hours (± 30 minutes), shall be heated from room temperature to + 40°C (± 3°C) and
shall during this period be brought to a relative humidity of 93 % (± 2 %) so that excessive condensation is
avoided.
These conditions shall be maintained for a period of at least 10 hours.
After this period, any climatic control devices provided within the equipment may be switched on.
30 minutes later the equipment shall be switched on, and shall then be kept working continuously for a
period of two hours.
The equipment shall be subjected to a performance check during the two hour period.
The temperature and the relative humidity of the chamber shall be maintained at + 40°C (± 3°C) and 93 %
(± 2 %) during the 2 hours and 30 minutes period.
At the end of the test, and with the equipment still in the chamber, the chamber shall be brought to room
temperature in not less than one hour. The equipment shall then be exposed to normal room temperature
and humidity for not less than three hours, or until moisture has dispersed, which ever is longer, before
the next test is carried out.
6.5.3 Requirement
The limit of the performance check shall be met.
7 Receiver
7.1 Audio frequency output power
7.1.1 Definition
The audio frequency output power of the receiver is the available power in the loudspeaker.
7.1.2 Method of measurement
The standard output power of the receiver shall be measured at a frequency of 1 kHz in a resistance
equal to the modulus of the impedance of the loudspeaker.
7.1.3 Limit
The standard output power used in this ETS shall be 50 mW.
The rated output power stated by the manufacturer shall be at least 500 mW.