I am setting up a state file for an embedded LO application on a PNA-X using firmware A.09.42.05. I was able to set it up for the SMC, NFx, and Swept IMDx measurement channels. However, I can't seem to bring up the embedded LO dialog box for the IMx Spectrum for converters measurement class. I read the help file and it says that this measurement class should support the embedded LO option. But when I click the menu item 'Response' and then 'Measure', there isn't an entry for 'Embedded LO' . Instead, the only entries are: 'Output Spectrum', 'IMX Spectrum Setup', and 'Measurement Class'. I also delve through the rest of the menu entries, but could not find any embedded LO selection. So my question is whether the embedded LO option is available for IMx Spectrum for Converters measurement class, and if so, how can I enable it and change the settings?
Actually you don't need Embedded LO for an IM SPectrum measurement for the same reason you wouldn't need it if you were measuring with a spectrum analyzer. if your embedded LO happened to be off a little bit in frequency, you would still be able to see the output tones on the spectrum if you set the span wide enough. the other measurements (including Swept IMD) need to be able to tune the receiver exactly to the correct IF frequency or we might miss all or part of the signal. that is not an issue with the spectrum mode.
-Yes, I do have the option 84 embedded LO option installed on my PNA-X. That's why I was able to set it up for the other measurement classes.
- Thanks for the explanation. You might want to add it to the PNA-X help file, since it confused me into thinking that I had to configure the embedded LO for the IMx spectrum for converters measurement class, like I did for the other measurement classes.