Goto Section: 2.1503 | 2.1507 | Table of Contents
FCC 2.1505
Revised as of October 1, 2008
Goto Year:2007 |
2009
Sec. 2.1505 Test instrumentation and equipment.
(a) Receiver (field intensity meter). A calibrated field intensity meter
(FIM) with a frequency range of 30 to 1000 MHz is required for measuring
radiated emission levels. This instrument should be capable of making peak
measurements with a bandwidth of 100 kHz.
(b) Spectrum analyzer. Spectral measurements are to be made with a spectrum
analyzer with a minimum resolution bandwidth no greater than 10 Hz. The
video filter, if used, should have a bandwidth wide enough so as to not
affect peak readings. A linear video output is desirable for performing
measurements of modulation characteristics.
(c) Storage oscilloscope. Measurements of modulation characteristics are to
be made using a calibrated storage oscilloscope. This instrument is to be DC
coupled and capable of manually triggered single sweeps.
(d) Frequency counter. A frequency counter with an accuracy of at least 5
parts per million is required for measuring the carrier frequency.
(e) Signal generator. A calibrated signal generator with an output of at
least 75 mW at 121.5 and 243 MHz is required for generating a reference
signal for site calibration.
(f) Antenna. Radiated emissions are to be measured with calibrated, tuned,
half-wave dipole antennas covering the frequency range of 30 to 1000 MHz.
(g) Temperature chamber. Tests which call for subjecting the EPIRB to
temperature levels other than the ambient temperature are to be performed in
a temperature test chamber which can be adjusted to stable temperatures from
−20 to +55 °C. This chamber is to be of sufficient size to accommodate the
EPIRB under test.
(h) Vibration table. A vibration table capable of vibrating the EPIRB with a
sinusoidal motion is required. The table must be capable of varying the
frequency of vibration either linearly or logarithmically over a range of 4
to 33 Hz with maximum peak amplitudes of up to 2.5 mm.
(i) Salt fog chamber. A chamber capable of producing salt fog at a
temperature of 35 °C for 48 hours is required. This chamber is to be of
sufficient size to accommodate the EPIRB under test.
(j) Drop test facility. A facility which will permit dropping an EPIRB from
a height of 20 m into water is required. The water must be deep enough so
that the EPIRB will not touch bottom when dropped.
Environmental and Operational Test Procedures
Goto Section: 2.1503 | 2.1507
Goto Year: 2007 |
2009
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