This standard specifies the terms and definitions, general technical requirements, test methods, quality inspection rules, packaging and transportation of synthetic signal generators. This standard is applicable to various types of synthetic signal generators. Measuring instruments with insertion units or auxiliary devices that have the function of synthetic signal generators can refer to this standard. The following normative references are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document. GB/T 191-2008 Packaging, Storage, and Transportation Graphical Symbols GB/T 6587-2012 General Specification for Electronic Measuring Instruments GB/T 6592-2010 Electrical and Electronic Measuring Equipment Performance Representation 3 Terms and Definitions The following terms and definitions apply to this document. 3.1 Synthesized Signal Generator A signal generator whose output frequency is derived mathematically from a reference oscillator (usually an internal oscillator), including a continuous wave synthetic signal generator (frequency synthesizer), a synthetic sweep signal generator, a vector signal generator, etc. 3.2 Frequency switching time is the time interval from the beginning of frequency change to the time when the frequency approaches the termination value and the deviation from the termination value remains within the specified range. Note: This clause should specify the step amount during the conversion of the transition rate and barium rate that deviate from the termination value. 3.3 Power level switching time is the time interval from the beginning of the level change to the time when the level approaches the newly selected rated value and remains within the specified error range. 3.4 Equivalent FM frequency offset of the unmodulated continuous wave signal output by the residual FM signal generator within the specified bandwidth. 3.5 Error vector amplitude The amplitude of the error vector in the I/Q constellation where the true position of the signal deviates from the theoretical position. Generally expressed as a percentage of the error vector amplitude to the theoretical position vector amplitude
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