Ok, I'm a step further now. I did the manual calibration as described in the manual. Now the automatic one only fails on 50 MHz. I'm now going to check with the miniVNA if the dummy load is indeed 50 ohm at 50 MHz, just in case.
>>>>> "Don" == Don Wilhelm <[email protected]> writes: Don> Even if the scope has a 1 Mohm input, it has considerable capacitance, Don> so yes, you need a 10X probe. Don> is needed to display the proper amplitude of an RF voltage. Don> 73, Don> Don W3FPR Don> On 2/12/2012 1:52 PM, Pierfrancesco Caci wrote: >> Thanks for this info. Now, please pardon my total ignorance in using >> these instrument. If the scope has an input impedance of 1 Mohm, do I >> still need to use the probe, or can I just use the BNC T ? I have the 50 >> ohm dummy on the other side of the T of course. >> With the scope directly connected, I read slightly over 600 mV peak to >> peak. Should be almost there, right? >> >> Pf >> -- Pierfrancesco Caci, ik5pvx ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
