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+ <TITLE>The DXSpider User Filtering Primer v1.0: Configuring Spot Filters</TITLE>
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+<H2><A NAME="s3">3.</A> <A HREF="filtering_en.html#toc3">Configuring Spot Filters</A></H2>
+
+<H2><A NAME="ss3.1">3.1</A> <A HREF="filtering_en.html#toc3.1">What is a spot filter?</A>
+</H2>
+
+<P>A spot filter is one rule (a one line spot filter) or multiple rules (multiple
+line spot filters) that a user can setup with-in DXSpider to control which
+specific spot(s) are received at the shack console. These configurable
+filters/rules reside on the DXSpider node and are stored along with the user's
+other information. Filters can be likened to a car wash . . . . . like cars;
+information goes in one end dirty, gets washed and comes out the other end
+cleaned.</P>
+
+<P>All spots received from other users on the cluster, or those received from other
+nodes, start out life destined for each and every connected user's console. If
+spot filtering has been configured, all spots headed for that user first go into
+the filter input, are processed and sent out the other end of these filters
+before being sent to the user's console. Like a car wash, each spot goes through
+one or many stages depending on whether the user wanted a simple or a
+super-duper filtering job. Along the way, the spot gets scrubbed, unwanted
+information removed or wanted information passed on and finally the wanted spots
+only are spit out the other end - nice and clean with all unwanted "stuff" sent
+down the drain to the infamous "bit-bucket." </P>
+
+
+<H2><A NAME="ss3.2">3.2</A> <A HREF="filtering_en.html#toc3.2">How can filters be used? </A>
+</H2>
+
+<P>For example, let's say our local user has never owned a microphone in this life
+and definitely doesn't want to see any of those useless SSB spots. Our user
+simply sets up a basic filter to reject any SSB spots before they reach the
+user's console. Similarly, it's now the ARRL CW DX contest weekend, so not only
+does our user not want to see SSB spots, but now doesn't want to see any UHF,
+VHF, DATA or any US/Canadian "DX" spots. Our user now only accepts HF CW
+CONTEST spots and in the same rule rejects spots for W and VE stations. In these
+and many more situations, "filters are our friends."</P>
+
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