About this page.

This blog was originally just going to be my Security assignment for electronic logs, but it has now evolved just a bit. In this blog will will find my notes and anything else we do in these classes.
Showing posts with label signal strength. Show all posts
Showing posts with label signal strength. Show all posts

Friday, September 28, 2012

Wireless: More Ch 4

Jerry's been yakkin quite a bit.  Showed us some different types of antennas in class.


Reviewed pictures/graphs showing filters and what is blocked. 

Wavelength (meters)( λ) = 300/F MHz - remember this, it'll be on the test and used.  

Extra Credit ops-              Ham Fest in Severville 9/29 50points
                                        LOPSA meeting 10/2 30points

Digressions links, unsure where they fit in, but looks important.
Dipole Antennas
Cell Phone Booster

Notes from class (such as it is) after the break.


Wireless: Chapter 3, Radio Communications



Filters removes unwanted F signals.  RF filter either passes or rejects a signal based on frequency.  There are three basic types of filters; low-pass, high-pass and bandpass filters.  Low pass blocks the high, lets the low through, high blocks low and keeps high.  The bandpass sets a range called a passband, which has a min and max threshold.