GB/T 42826-2023Radio-controlled clocks - Signal receiving measurement method (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents"

Drafting.

This document is equivalent to ISO 23346.2020 "Radio-controlled Clock Signal Reception Test Method".

Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents.

1 Scope

This document defines the terms and definitions of radio-controlled clocks and describes general test methods for signal reception.

This document is applicable to radio-controlled clocks with pointer indication or/and liquid crystal display or/and LED (light-emitting diode) display. Radio-controlled clock movements can also be used.

Use accordingly.

2 Normative reference documents

This document has no normative references.

3 Terms and definitions

The following terms and definitions apply to this document.

3.1

radio-controlledclock

A quartz clock that can receive time code signals (3.2) and automatically calibrate the time and calendar based on the received signals.

3.2

time code signal standardtimesignal

A time-coded modulated signal broadcast by the national statutory timing agency in the form of long-wave radio.

Note. For specific information on the world's major time code signals, see Appendix A.

3.3

receivingstate receivingstate

The state when the radio-controlled clock (3.1) receives the time code signal (3.2).

4 Signal reception test method