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  deg.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  deg.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