On Wed, Apr 22, 2015 at 2:55 PM, Martin K wrote: > On 4/22/2015 5:33 AM, embedded systems wrote: > > White band saying DC-3GHz ? > > It will have different inputs for Lo (max 50MHz or so) and Hi. > > On LO will be simple amplifier/comparator with or without filter. On HI > > will be an amplifier followed by a RF divider. > > I suppose the conclusion would be that you need to analyze the signal > with a spectrum analyzer to know that it has one main component, > followed by a frequency counter to precisely measure the frequency. > Frequency counters are not precise tools when the measurement signal is not pure. For instance, a frequency meter can display often twice the value of your real frequency if a glitch appears. Yes, if you want to see how looks your signal you need a spectrum analyzer, but you don't need the anymore the frequency counter, it already has it. Don't expect to see on the spectrum analyzer only signal you measure, often low cost spectrum analyzers are displaying ghosts from inside. One is Aaronia. Sometime Keysight (formerly Agilent) too. > - > Martin > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .