MIL-STD-188-141C CHANGE 1

Abstract

The purpose of this document is to establish technical performance and interface parameters in the form of firm requirements and optional design objectives (DO) that are considered necessary to ensure interoperability and interface standardization of new long-haul and tactical radio systems in the medium frequency (MF) band and in the high frequency (HF) band. It is also the purpose of this document to establish a level of performance for new radio equipment that is considered necessary to satisfy the requirements of the majority of users. These technical parameters, therefore, represent a minimum set of interoperability, interface, and performance standards. The technical parameters of this document may be exceeded in order to satisfy certain specific requirements, provided that interoperability is maintained. That is, the capability to incorporate features such as additional standard and nonstandard interfaces is not precluded. <br><u>Applicability.</u> <br>This standard is approved for use within the Department of Defense (DoD) in the design and development of new MF and HF radio systems. It is not intended that existing equipment and systems be immediately converted to comply with the provisions of this standard. However, this standard establishes requirements for new equipment and systems, and those undergoing major modification or rehabilitation. If deviation from this standard is required, the user should contact the lead standardization activity for waiver procedures.<b><u>Intended Use:</u></b> This standard contains requirements to ensure interoperability of new radio equipment with longhaul and tactical application in the MF and HF bands. Appendix F contains additional special requirements for applications in which more than one such radio is installed on a single mobile platform or fixed location (co-site installations). Table III offers guidance in applying these sets of requirements to various applications. There is no requirement for linking protection to be a part of a user&#8216;s acquisition unless the user has an identified need. Optional levels of linking protection are identified and detailed. Options AL-1 and AL-2 provide an inexpensive, least protected mode, and AL-3 provides a more sophisticated protection mode. The users should establish their application level based on minimum essential requirements. There is no requirement for the user to acquire any of the advanced technology defined in the appendices to this document unless the user has an identified requirement.<br>