Epilogue我在烧焦的地方焊接了一个49.9欧姆的小型0402尺寸电阻器，我在整个频率范围内观察到一个稳定的信号略高于设定值几个dB。
在使用我的hp437B功率计进行服务调整程序后，一切都恢复正常。
非常感谢，我的分析仪正在工作。
作为afternote，我在辅助设备上测量52欧姆电阻。
RF路径不是单独的电阻值：我已经意识到这个电阻器与下游的50欧姆接地电阻器和上游侧的开关耦合器的2.x欧姆电阻接地并联，即50 + 2
.x = 52欧姆。
的确，它一定是近似的。
500欧姆提供测量的信号衰减。编辑：John F4GEQ于2013年2月13日上午9:08
以上来自于谷歌翻译
以下为原文
Epilogue
I welded a tiny 0402 size resistor of 49.9 Ohm in the place of the burnt one and I observed a solid signal slightly above set point by a few dB across the full frequency range. Everything went back to normal, after proceeding with the service tuning routines with my hp437B power meter.
Many thanks indeed, my Analyzer is working.
As an afternote, my 52 Ohm resistor measurement on the aux. RF path was not the resistor value alone:
I have since realized this resistor is paralleled by the 50 Ohm ground resistor downstream, and by the 2.x Ohm resistance-to-ground of the switch-coupler on upstream side, i.e. 50+2.x= 52 Ohm. Indeed it must have been approx. 500 Ohm to provide the measured signal attenuation.
Edited by: John F4GEQ on Feb 13, 2013 9:08 AM
Epilogue我在烧焦的地方焊接了一个49.9欧姆的小型0402尺寸电阻器，我在整个频率范围内观察到一个稳定的信号略高于设定值几个dB。
在使用我的hp437B功率计进行服务调整程序后，一切都恢复正常。
非常感谢，我的分析仪正在工作。
作为afternote，我在辅助设备上测量52欧姆电阻。
RF路径不是单独的电阻值：我已经意识到这个电阻器与下游的50欧姆接地电阻器和上游侧的开关耦合器的2.x欧姆电阻接地并联，即50 + 2
.x = 52欧姆。
的确，它一定是近似的。
500欧姆提供测量的信号衰减。编辑：John F4GEQ于2013年2月13日上午9:08
以上来自于谷歌翻译
以下为原文
Epilogue
I welded a tiny 0402 size resistor of 49.9 Ohm in the place of the burnt one and I observed a solid signal slightly above set point by a few dB across the full frequency range. Everything went back to normal, after proceeding with the service tuning routines with my hp437B power meter.
Many thanks indeed, my Analyzer is working.
As an afternote, my 52 Ohm resistor measurement on the aux. RF path was not the resistor value alone:
I have since realized this resistor is paralleled by the 50 Ohm ground resistor downstream, and by the 2.x Ohm resistance-to-ground of the switch-coupler on upstream side, i.e. 50+2.x= 52 Ohm. Indeed it must have been approx. 500 Ohm to provide the measured signal attenuation.
Edited by: John F4GEQ on Feb 13, 2013 9:08 AM
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