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我有一个8753D有错误我有一个错误A8 Post Reg 70%失败当我运行自检时错误21和22在我的8753D中测试失败。
其他失败率为30%。 后置稳压器位于原理图中的哪个位置? 什么可以坏的想法? 症状是:当我在一个同轴电缆的末端使用50欧姆校准两个不同的范围(319到320 MHz和318.5到320.5 MHz)并保存它们时,分析仪在史密斯图表上读取50欧姆进行两次校准 。 当我去测试阻抗(1端口)时,我使用两个校准范围获得了非常不同的DUT读数。 Max Hendrickson hcelectronics@hotmail.com 以上来自于谷歌翻译 以下为原文 I have a 8753D that has the error I have a error A8 Post Reg 70% failure when I run the self test and also errors 21 and 22 fail the test in my 8753D. Other failures are 30%. Where is the Post Regulator located in the schematic? Any thoughts on what can be bad? symptoms are: when I calibrate using 50 ohms at the end of a piece of coax for two different ranges (319 to 320 MHz and 318.5 to 320.5 MHz) and save them, the analyzer reads 50 ohms on the smith chart for both of the calibrations. When I go to test a impedance (1 port) I get very different readings for the DUT using the two calibrated ranges. Max Hendrickson hcelectronics@hotmail.com |
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后调节器是一种卡,它从后面板电源获取电源电压并清除所有其他电路板。
如果调节器坏了,那么你可能会在合成器上获得良好的锁定时遇到问题,所以你认为你所处的频率是不正确的。 我认为所有post reg的电压都在板上标记,测试点位于电路板顶部。 测试它们,看看我们是否有任何脱节。 大多数应该带有+ -0.2 v的标记值。 我认为post reg最接近显示器,但我不记得,我不在我能看的地方。 以上来自于谷歌翻译 以下为原文 post regulator is a card that that takes the power supply voltages from the rear panel power supply and cleans them up for all the other boards. If a regulator went bad, then you will likely have trouble with obtaining a good lock on the synthesizer, so the frequency you think you are at is not correct. I think all the post reg's voltages are labled on the board, with test points at the top of the board. Test them and see if any our out of line. Most should be withing +-0.2 v of the labeled value. I think the post reg is nearest the display, but I don't for sure remember and I'm not where I can look. |
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