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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AN4133 датащи(PDF) 29 Page - STMicroelectronics |
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AN4133 датащи(HTML) 29 Page - STMicroelectronics |
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29 / 35 page  AN4133 Receiver Doc ID 023362 Rev 1 29/35 5 Receiver Only one measurement is required for the receiver, the limit on secondary radiated emission. This measurement is performed under the following conditions: Tc = 25 °C, Vdd = 3.0 V, f = 922 MHz (middle frequency of the bandwidth used). 5.1 Limit on secondary radiated emission Spurious radiation from the receiver includes components at any frequency, radiated by the equipment. The spurious emission strength at the antenna input has to be less than the values in Table 2 for the convenience radio stations and Table 4 for the low-power radio stations. The two tables are the same, so the measurement is performed only once, setting the receiver to 922 MHz, maximum gain. The measurement results are given in Figure 34 to 39. The entire standard requirements are met from the SPIRIT1 in receiver mode. Figure 34. Receiver radiated emission in the 10 - 710 MHz bandwidth -110 -100 -90 -80 -70 -60 -50 -40 1.00E+07 1.10E+08 2.10E+08 3.10E+08 4.10E+08 5.10E+08 6.10E+08 7.10E+08 Frequency [Hz] Convenience radio station receiver spurious emission 10 - 710 MHz Spirit ARIB mask |
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