The Amateur Extra license exam is a 50 question test drawn from a pool of questions. The question pool is divided into 10 subelements [E0—E9]. Each subelement is subdivided into topics groups. There are 50 topics represented in the question pool.
Spurious is defined as "Not being what it purports to be; false or fake". Spurious emissions are "false" emissions that accompany legitimate emissions. Usually they are caused by a poorly calibrated or faulty transmitter. On a spectrum analyzer they would show up as being spikes of RF energy sometimes adjacent to the real signal and sometimes at random intervals usually close by.
Call Search. New to Ham Radio? My Profile. Select the exam you would like to take below by selecting the button next to the license class. Then click on the 'Take Exam' button.
The changes between the two were relatively minor and the withdrawal seems to have been more to reduce the email volume for things they already knew about. This article is still valid, and the new pool has been updated on HamStudy. If you want to see exactly what has changed, check out the full graphical diff. If you just want the summary, read on! Most of the wording changes are simple clarification of previous language or improvement to grammar or punctuation, sometimes dropping out confusing terms e.