GB/T 12192-2017 in English
VALIDMethods of measurement for transmitters employing F3E or G3E emissions used in the mobile services
- Issued on:2017-12-29
- Implemented on:2018-07-01
- File Format:PDF
- Delivery:Via email within 5 business days
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《GB/T 12192-2017移动通信调频发射机测量方法》由339-1（工业和信息化部（电子））归口，主管部门为工业和信息化部（电子）。
Introduction
Interpretation of the core content of the standard
| Measurement items | Key parameters | Key points of the test method |
|---|---|---|
| Frequency error | ≤±1kHz | Use a frequency meter with 10 times higher accuracy to measure the unmodulated carrier |
| Radiated carrier power | ERP≤50W | Average of measurements in 8 directions at the OATS/LRTS site |
| Adjacent channel power | ACPR≤-60dB | Three methods of power measurement receiver/spectrum analyzer are optional |
Technology Evolution Analysis
The main technical changes in the 2017 version of the standard include:
- Added a new Compressor Characteristics test chapter (Chapter 19)
- Optimized the radiated power measurement method and introduced the LRTS site
- Updated the adjacent channel power measurement method and added a digital spectrum analyzer solution
- Revised the intermodulation conversion loss test process
Test Site Selection Guide
The standard recommends three test sites:
- Open Area Test Site (OATS): Applicable to 100MHz-1GHz, pay attention to the influence of ground reflection
- Low Reflection Test Site (LRTS): Use absorbing materials to suppress reflection, and the measurement repeatability is higher
- Anechoic chamber (AC): fully shielded environment, suitable for precision measurement
Typical 3m test site attenuation range: 32-58dB (at 1GHz)
Implementation suggestions
Key points:
- Battery-powered equipment needs to adjust the test voltage according to Table 1
- The radiation measurement scheme in Appendix A should be used for self-assembled antenna equipment
- When measuring adjacent channel power, the resolution bandwidth of the spectrum analyzer should meet the following requirements:
Specified bandwidth/200 ≤ R ≤ specified bandwidth/40
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