[TenTec] Roofing Filters

[Ken Brown <ken.d.brown@hawaiiantel.net>]

In my previous post I should have changed the subject title.
Another observation about the term "roofing filter":
I don't recall hearing the term used until receivers were being made 
that used IF DSP.
Is the term only applicable to receivers using IF DSP?
I know that Inrad makes a roofing filter modification for the Omni VI 
rigs. Is that an incorrect usage of the term?
All filters in all stages of a receiver perform essentially the same 
functions. That is to limit the bandwidth that following stages have to 
handle, and when before a mixer to reject image response, or when before 
a ADC in a DSP receiver to reduce aliasing responses. So what makes some 
filters "roofing filters" and others not?
DE N6KB


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