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LMX2594: 输出功率过低

Part Number: LMX2594

lmx2594在低频段比如2ghz输出功率低到-70dbm,而且寄存器对输出功率失去控制,板子基本参考EVM板,只不过是双层,阻抗或走线问题可以排除掉,是热保护么还是什么原因。其他牌子时钟也碰到类似输出过低的情况,经测试发现是某设置管脚悬空。