IEC 60122-2-1:1991/AMD1:1993 is an amendment to the quartz crystal units guidance for frequency control and selection, specifically for microprocessor clock supply. It is relevant when engineering teams, test laboratories, and procurement groups need a technical reference that supports selection, evaluation, and documentation of quartz crystal units used in clocking applications. As a supporting document to IEC 60122-2-1:1991, it helps align technical review and conformity assessment activities with the updated guidance contained in the parent document.

IEC 60122-2-1:1991/AMD1:1993 standard overview

This amendment modifies the guidance associated with quartz crystal units for frequency control and selection in microprocessor clock supply applications. IEC 60122-2-1:1991/AMD1:1993 is best understood as a technical document used alongside the parent reference to support engineering documentation, product evaluation, and compliance workflows. It is commonly useful where design teams need a structured basis for reviewing crystal unit suitability, consistency in verification activities, and documented evaluation of timing components in electronic equipment.

Applications of IEC 60122-2-1:1991/AMD1:1993

The document is typically relevant in electronics development, component qualification, and laboratory evaluation of timing devices used in microprocessor clock circuits. It may support procurement review when comparing quartz crystal units for operational consistency, as well as technical assessment during design verification and quality workflows. Organizations working on embedded systems, control equipment, or other electronic assemblies that depend on stable clock supply often use this kind of reference to strengthen specification reviews and internal compliance preparation.

Why IEC 60122-2-1:1991/AMD1:1993 matters

For teams responsible for conformity assessment and technical validation, IEC 60122-2-1:1991/AMD1:1993 helps maintain a reliable reference point when documenting requirements for quartz crystal units in clock supply use. By linking the amendment to the parent guidance, it supports consistency in engineering review, testing workflows, and procurement decisions. That can reduce selection risk, improve traceability in compliance preparation, and help ensure that product evaluation is based on a clearly defined technical document.

• Supporting amendment to the parent guidance for quartz crystal units used in microprocessor clock supply
• Useful for design review, component selection, and documented evaluation of timing devices
• Relevant to testing workflows and verification activities for electronic assemblies
• Helps align procurement and conformity assessment preparation with the referenced technical guidance