IEEE 521-1984
Frequency Bands
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- Language: English
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About This Item
521-1984 defines frequency bands for aerospace and related component, circuit, device, and system applications, giving engineers a common reference for band allocation and technical communication. As a superseded standard, 521-1984 is still useful when reviewing legacy designs, documentation, or procurement records that reference the original frequency band structure. It helps reduce ambiguity in planning, specification work, and compliance checks where exact band definitions matter.
About 521-1984
The purpose of 521-1984 is to describe frequency bands in a structured way for use in technical and engineering contexts. In practice, that kind of standard supports consistent interpretation of operating ranges, test conditions, and equipment specifications across aerospace and transportation-related systems. For teams working with older documentation, the standard can serve as a reference point when tracing how frequency bands were assigned or identified in design and verification materials.
Where is 521-1984 used?
521-1984 is most relevant in environments where frequency band definitions affect design, integration, or testing of aerospace electronics and related systems. It may be used in radio-frequency components, communication subsystems, avionics support equipment, and other devices that depend on clearly defined operating ranges. The standard is also useful when comparing legacy parts, updating technical files, or checking whether earlier specifications align with historical band terminology.
Importance in practice
Using 521-1984 helps maintain consistency when frequency-related requirements must be read, specified, or verified across different documents and teams. That matters for procurement, configuration control, and engineering review because even small differences in band interpretation can affect compatibility and performance. As a superseded reference, it is especially valuable for legacy compliance work, where accurate historical context can reduce rework, testing confusion, and specification risk.
- Frequency band definitions
- Aerospace technical reference
- Legacy documentation support
- Component and system planning
- Compliance and review consistency
- Publication Date: 1984
- Standard Status: Superseded
- Publisher: IEEE
- Subject: Aerospace; Components, Circuits, Devices and Systems; Transportation
- Official IEEE: Doi link
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