GB/T 20408-2016Radio-controlled analogue clocks (English PDF)

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 20408-2006 "pointer type radio clock", compared with GB/T 20408-2006, the main technical changes are as follows.

- modified the scope of application of the standard (see Chapter 1);

- modified the definition of the term "radio bell" (see 3.1);

- modify the term "standard time signal" to "time code signal" (see 3.2);

- the addition of the terms and definitions of the "base" (see 3.3);

- modified the "travel state" definition (see 3.6);

--- Removes the terms and definitions of the "bell clock mode", "Quartz clock mode", "Average power consumption current";

- Added the terms and definitions of "automatic reception" (see 3.9);

--- modify the average power consumption current technical indicators (see Table 1);

--- modified reception sensitivity (see 4.4.1);

--- removed the "mode conversion" and "pointer adjustment" requirements and test methods;

- the contents of the "noise level" in the signal field strength are deleted (see 4.6.1, 5.1.3, 5.3.6, 5.3.7);

--- modified the average instantaneous difference and the voltage coefficient of the index requirements (see Table 3);

- add a note to the "additional function" requirement (see 4.17);

- modified "instrumentation" requirements (see 5.2);

- modified "positioning" test method (see 5.3.5);

- modified "acceptance times" test method (see 5.3.7);

--- modified the factory to test the "use of reliability", "average power consumption" and "positioning bias" of the reception quality limit (see Table 5);

--- modified type test "working voltage" "operating temperature" "average power consumption" "positioning time" "positioning deviation" "indicates calibration" "Receiving times" "Auto recovery" "Manual reception" "Voltage factor" "Temperature factor" and "Appearance" of the unqualified quality level, qualified The number of judgments and the number of nonconformities (see Table 6);

--- modified "packaging" requirements (see 7.2.3).

1 Scope

This standard specifies the technical requirements, test methods, inspection rules, signs, packaging and transportation of the pointer type radio bell (hereinafter referred to as radio bell) And storage.

This standard applies to the nominal operating voltage of DC1.50V or DC3.00V radio clock, the other nominal operating voltage of the radio clock and electricity Wave clock movement can also refer to the use.

2 Normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this document. For undated references, the latest edition (including all modifications) applies to this document.

GB/T 2828.1 Sampling inspection procedures Part 1: Batch inspection sampling plan for retrieval by quality limit (AQL)

GB/T 2829 Periodic inspection count Sampling procedures and tables (for inspection of process stability)

GB/T 6046 pointer quartz clock

3 Terms and definitions

The following terms and definitions apply to this document.