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3 1 $begingroup$ I often find a thru cal on RF PCB like picture below. What is the purpose of having this thru cal thing on the board? One purpose I can think of is to test whether the designed transmission line is truly 50 ohms over the frequency of interest. I did some research online and there are some people saying that the purpose of this thru cal is for "through-reflect-line" (TRL) testing. But I was not convinced with this argument since TRL technically needs other two lines (reflect and line). Can anyone explain this to me from their experience? pcb rf share | improve this question asked 2 hours ago ...

2 After the duel between Saruman and Gandalf in which Gandalf is bested, he is sent to stay on the pinnacle of Orthanc. Gandalf then whispers a message to a moth that happens to appear. I know that the message involves the calling of an eagle, for that becomes obvious ten minutes later. However, what exactly does Gandalf say to the Moth in the Elvish tongue? tolkiens-legendarium the-lord-of-the-rings the-fellowship-of-the-ring share | improve this question edited 2 hours ago Mat Cauthon 17k 4 84 134 asked 4 hours ago...

0 Magento2.2.5 based multisite (multi store view)seems to be creating a lot of temporary tables such as catalogrule_product__temp9a310576 catalogrule_product__temp998786f4 etc... However I am not sure why these tables are being created they all seem to be empty? database magento2.2.2 share | improve this question asked Dec 14 '18 at 19:55 Jayreis Jayreis 173 7 31 add a comment  |  ...