测试结果

我已经使用TinySA频谱分析仪测试了谐波滤波,以确保其符合美国联邦通信委员会(FCC)第97部分关于杂散发射的要求(对于甚高频,二次谐波必须至少为-40dBc,且功率低于10微瓦)。

PCB v1.8x

PCB的v1.8a、v1.8b和v1.8c版本的二次谐波为-53.0dBc,谐波功率为5微瓦,完全符合FCC第97部分(在62dB衰减下测试):

A photo of a TinySA measuring the spurious emissions of the kv4p HT v1.8x, the graph shows a single large spike at the transmitting frequency.

PCB v1.7b

PCB的v1.7b版本在二次谐波方面为-52.9dBc,谐波功率为5微瓦,完全符合FCC第97部分标准(在56dB衰减下测试):

A photo of a TinySA measuring the spurious emissions of the kv4p HT v1.7b, the graph shows a single large spike at the transmitting frequency.

PCB v1.7

PCB的v1.7版本在二次谐波方面为-52.7dBc,谐波功率低于4微瓦,完全符合FCC第97部分标准(在56dB衰减下测试):


A photo of a TinySA measuring the spurious emissions of the kv4p HT v1.7, the graph shows a single large spike at the transmitting frequency.