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.
