MIL-PRF-26542/12C
TABLE II. Parameter applicability.
Inspection
Qualification Group Group Group
tests
"A"
"B"
"C"
tests tests tests
Group I
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 characteristics
X
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
N/A
N/A
Immersion
N/A
N/A
Group IV
Fungus
X
Group V
Gun blast
N/A
Microphone bracket leakage
X
Changes from previous issue. The margins of this specification sheet are marked with vertical lines to
indicate where changes from the previous issue were made. This was done as a convenience only and
the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and
contractors are cautioned to evaluate the requirements of this document based upon the entire content,
regardless of the marginal notations and relationship to the last previous issue.
Referenced documents. In addition to MIL-PRF-26542, this document references the following:
MIL-STD-1285
7
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