ALM-178A Countermeasures Test Sets, herein referred to as the ??CM Test Sets.??

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12

MIL-PRF-49136C(CR)

3.6.5 Rain. The CM Test Sets shall operate during and after prolonged exposure to rain,

with or without an intermittent wind.

3.6.6 Immersion. The transit case of the CM Test Sets shall withstand immersion in fresh

water to a covering depth of three feet for not less than two hours and not greater than two

and a quarter hours.

3.6.7 Dust. The CM Test Sets shall operate during and after exposure to wind-borne dust

with velocities up to 35 knots.

3.6.8 Salt Fog. The CM Test Sets shall operate during and after exposure to salt fog of

marine coastal atmospheres and salt fallout over land areas of the world, and shall show no

evidence of corrosion or rust of external parts and no binding of rotary controls and switches

when rotated.

3.6.9 Fungus. The CM Test Sets shall operate after exposure to fungus growth as is

encountered throughout the world, and shall show no evidence of deterioration that adversely

affects operation.

3.6.10 Vibration I. The CM Test Sets shall withstand vibration that is sustained during field

transport by military vehicle.

3.6.11 Vibration II. The CM Test Sets shall withstand vibration in the frequency range of

5.5 to 200 Hz and at a 1.5 g test level. Sweep rate shall be 5-200 Hz in 12 minutes with a

total of 84 minutes per axis.

3.6.12 Shock. The CM Test Sets shall withstand shock that is induced by rough handling.

3.6.13 Bench Handling. The CM Test Sets shall withstand bench-handling shock that is

encountered in servicing.

3.7 Electromagnetic Compatibility. The CM Test Set, AN/ALM-178, when connected to

Countermeasures Set, AN/ALQ-144( )(V)1 and 3 and simulating flight line operation, shall

meet the emissions and susceptibility requirements of Appendix A.

The CM Test Set, AN/ALM-178A, when connected to Countermeasures

Set, AN/ALQ-144( )(V)1 and 3 or Countermeasures Set, AN/ALQ-144A(V)5 and

simulating flight line operation, shall meet the emissions and susceptibility requirements of

Appendix A.

3.8 Workmanship. All electronic parts, components, assemblies and subassemblies shall

be free of smudges, excess solder, metal chips or the existence of any foreign material on any

surface. Bearing assemblies shall be free from rust, dirt or tool marks. Wires and integrated

circuitry shall be protected from contact with rough or irregular surfaces and be shielded

from shorting.