A-A-50682
a. Restricted materials. The equipment shall comply with the restricted material requirements of MIL-T-28800, including the requirement for mercury and radioactive materials, and shall contain no combination of materials which cause deterioration of any material contained in the equipment due to the effects of outgassing.
3. Design and construction. Unless otherwise specified herein, the equipment shall comply with the type III design and construction requirements of MIL-T-28800. The equipment shall be of solid-state construction. Encapsulation and embedment (potting) of subassemblies may be used only for high voltage circuits where construction is susceptible to leakage or corona, indicators and associated controls shall be in close proximity to each other, all potentiometer controls shall have at least a 270 degree rotation range (4.71s radians).
a. Type of Construction. Construction of the SNMS shall be of a monolithic or a separate component design.
b. Modular Design Restrictions. The modular design concept for the SNMS is acceptable with the following restrictions:
(1) Each module shall contain a power circuit protection fuse.
(2) Each module plug-in card shall be keyed and mated with the back plane receptacle so that modules may not be randomly placed into the mainframe.
(3) Modules shall not be removable by access through the front or rear of the mainframe with the unaided hand.
(4) A package part number shall be assigned to the SNMS as a whole system. This system part number shall be marked on the mainframe identification plate and all plug-in(s).
(5) All module interfaces shall be done in the back of the mainframe.
c. Signal Input and Output Connectors. Unless otherwise specified, all signal input and output connectors shall be type BNC female.
d. Internal Cooling. The equipment shall be capable of operating continuously for twenty-four
(24) hours at 55'C. If forced air is used, it shall be as specified in MIL-T-28800.
(1) Forced Air Cooling Motor. DC brushless motors shall be utilized for the forced air cooling motor in the equipment.
(2) Air Filter. Equipment utilizing a cooling scheme which exhausts air from the equipment through the cooling fan shall not require an externally accessible air filter.
(3 ) Thermal Switch. A thermal switch shall be provided which will interrupt circuit power to the
Scalar Network Analyzer when the internal temperature rises to the degree of possible damage to
3
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business