GB/T 42826-2023 in English

《GB/T 42826-2023电波钟 信号接收测试方法》由TC160（全国钟表标准化技术委员会）归口，主管部门为中国轻工业联合会。

GB/T 42826-2023 Radio-controlled clocks - Signal receiving measurement method

1 Scope

This document specifies the terms and definitions, and the signal receiving general measurement method for radio-controlled clocks.

It is applicable to the analogical or/and liquid crystal display or/and LED display radio-controlled clocks, and the radio-controlled clock movements can also refer to it.

2 Normative references

There are no normative references in this document.

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

3.1
radio-controlled clock
quartz clock which can receive standard time signal (3.2) and automatically regulate time and calendar according to the received signal

3.2
standard time signal
time code modulation signal broadcasted from the national statutory time service institution by means of long wave

Note: For the specific information of time code signals in the world, see Annex A.

3.3
receiving state
state when the radio-controlled clock (3.1) receives the standard time signal (3.2)

4 Signal receiving measurement method

4.1 Test conditions

4.1.1 General environment

The test ambient temperature shall be 18 °C to 25 °C, the temperature fluctuation shall not be greater than 2 °C during the whole test and the relative humidity is 30 % to 70 %.

4.1.2 Power supply

The supply voltage for samples to be tested shall be the nominal operating voltage.