ETSI ETS 300 441, Инструкция по эксплуатации

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ETS 300 441: February 1996
The temperature of the chamber shall be maintained at the extreme temperatures for the whole duration
of the performance test.
At the end of the test, with the equipment still in the chamber, the chamber shall be brought to normal
temperature in not less than one hour. The equipment shall then be exposed to normal temperature and
humidity for not less than three hours or until moisture has dispersed, whichever is the longer, before the
next test is carried out. Alternatively, observing the same precautions, the equipment may be returned
directly to the conditions required for the start of the next test.
5.6 Artificial antenna
For the purpose of conformance testing, the receiver shall meet the requirements of this ETS when an
artificial antenna consisting of a resistance of 10
Ω
in series with a capacitance of 250 pF is connected as
described in subclause 5.7.
This shall in no way imply that the receiver shall work only with antennas having that characteristic.
5.7 Test signals applied to the receiver input
Sources of test signals for application to the receiver input shall be connected through a network such that
the impedance presented to the receiver input is equal to that of the artificial antenna specified in
subclause 5.6. This requirement shall be met irrespective of whether one or more test signals are applied
to the receiver simultaneously. In the case of multiple test signals, steps shall be taken to prevent any
undesirable effects due to interaction between the signals in the generators or other sources.
The levels of the input signals shall be expressed in terms of the emf that exists at the output terminals of
the signal sources including the associated network.
5.8 Measurement uncertainty and interpretation of the measuring results
5.8.1 Measurement uncertainty
Table 1: Absolute measurement uncertainties
Parameter Maximum values
Audio output power
±
0,5 dB
Sensitivity
±
3 dB
Conducted emission
±
3 dB
Two signal measurement
±
4 dB
For the test methods according to this ETS the uncertainty figures are valid to a confidence level of 95 %
calculated according to the methods described in ETR 028 [4].
5.8.2 Interpretation of the measurement results
The interpretation of the results recorded in a test report for the measurements described in this ETS shall
be as follows:
- the measured value related to the corresponding limit will be used to decide whether an equipment
meets the requirements of the ETS;
- the measurement uncertainty value for the measurement of each parameter shall be included in the
test report;
- the recorded value of the measurement uncertainty shall be for each measurement equal to or
lower than the figures in table 1.