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Magnetic Coupling susceptibility |
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|  MIL-D-81347C(AS)
(2) A straight line drawn from the point 3 MHz and
37 DB uv to 25 MHz and 40 DB uv.
(3) A straight line drawn from the point 25 MHz and
30 DB uv to 35 MHz and 38 DB uv.
(4) A straight line drawn from the point 35 MHz and
38 DB uv to 300 MHz and 51.5 DB uv.
(5) A straight line drawn from the point 300 MHz and
32.5 DB uv to 1000 MHz and 40 DB uv.
3.5.4.4.4.3.3.2.6.5
Radiated Interference-Antenna Induced (AI) Broadband Limit-
Rod Antenna - The upper limit for this requirement shall be a straight line drawn from the point 15
KHz and 109 DB uv/MHz to 150 MHz and 91 DB uv/MHz.
3.5.4.4.4.3.3.2.6.6
Radiated Interference-Antenna Induced (AI) Narrowband Limit
Rod Antenna - The upper limit for this requirement shall be a straight line drawn from the point 15
KHz and 57 DB uv to 150 KHz and 37 DB uv.
Magnetic Coupling susceptibility - The magnetic coupling
3.5.4.4.4.3.3.2.6.7
susceptibility requirement as specified in 4.2.1.3.1 of WR-101, Part I, shall not be required to be
performed on the MDM interconnecting and interface signal lines.
Current Probe Conducted Interference - The current probe con-
3.5.4.4.4.3.3.2.6.8
ducted interference tests as specified in 4.2.1.1. of WR-101 Part I, and 4.3.1 of MIL-I-6181D
shall not be required to be performed on the MDM interconneting and interface signal lines.
Test Logic - The equipment shall contain test logic for the pur-
3.5.4.4.4.3.3.2.7
pose of isolation of malfunctions down to a replaceable maintenance module. Test mode commands
from the Drum Controller shall be the stimulus of the test function. Internal test signal responses
shall be provided to the Drum Controller to provide the basis for automatic fault isolation. The
volume of circuitry added for test purposes shall not exceed 15% of the normal operational circuitry.
Grounding - The Magnetic Drum Memory system shall be pro-
3.5.4.4.4.3.3.2.8
vided with a signal ground which is isolated from the MDM frame.
Hermetic Seal - The Magnetic Drum shall be a hermetically
3.5.4.4.4.3.3.2.9
sealed unit and shall have a leak rate such that the Magnetic Drum remains pressurized to an opera-
tionally acceptable pressure for a period of at least two years.
Provisions for Maintainability - Maintenance module require -
3.5.4.4.4.3.3.2010
ments for the MDM shall be as defined in 3.3.7.2.1.
Identification Marking - Identification marking for the MDM
3.5.4.4.4.3.3.2.11
shall be in accordance with the requirements for a subassembly of Logic Unit 4 as given in
MIL-E-5400.
Standard Conditions - Those conditions given in 3.3.9 for Logic
3.5.4.4.4.3.3.2.12
Unit 4 shall be used to establish normal performance characteristics for the MDM under standard
conditions and for making laboratory bench tests.
Service Conditions - The MDM, when installed in a Logic Unit
3,5.4.4.4.3.3.2.13
4 enclosure, shall operate satisfactorily under any of the environmental service conditions specified
in 3.3.10 except as modified herein. All environmental conditions shall be applied to the Logic Unit
4 enclosure.
3.5.4.4.4.3.3.2.13.1
Temperature - The MDM shall operate as specified herein when
subjected to the temperatures specified in 3.3.10.5 except that at temperatures above 55 C
the equipment shall not be required to meet the MDM error rate requirement. However, no
damage to the MDM shall occur during the high temperature tests.
263
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