MIL-PRF-26542/2E
TABLE II. Parameter applicability.
Inspection
Qualification
Group
Group
Group
"A"
"B"
"C"
Group l
Visual and mechanical inspection
X
X
Sensitivity at ground level
X
X
Sensitivity at altitude
X
Frequency response at ground level
X
X
Frequency response at altitude
X
Impedance . . . . . . . . . . . . . . . . . . . . . . .
X
X
Noise cancellation characteristic
N/A
Effect of external magnetic field
X
Stray magnetic field
X
Linearity . . . . . . . . . . . . . . . . . . . . . . . . . . .
X
Talk-out . . . . . . . . . . . . . . . . . . . . . . . . . . .
X
X
Dielectric withstanding voltage
X
Signal-to-noise . . . . . . . . . . . . . . . . . . . . .
X
X
Distortion . . . . . . . . . . . . . . . . . . . . . . . . . .
X
X
Interchangeability
X
X
Group II
Thermal shock
X
X
Humidity . . . . . . . . . . . . . . . . . . . . . . .
X
X
Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
X
X
Pressure equalization
X
X
Explosive decompression
X
X
Salt fog . . . . . . . . . . . . . . . . . . . . . . .
X
X
Group III
Vibration . . . . . . . . . . . . . . . . . . . . . . .
X
X
Bounce . . . . . . . . . . . . . . . . . . . . . . .
X
X
Altitude . . . . . . . . . . . . . . . . . . . . . . .
X
X
Moisture barrier seal
X
X
Immersion . . . . . . . . . . . . . . . . . . . . . . .
N/A
Group IV
Fungus
X
Group V
Gun blast . . . . . . . . . . . . . . . . . . . . . . .
N/A
Boom finish . . . . . . . . . . . . . . . . . . . . . . .
X
X
Boom operating force
X
X
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