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[TenTec] Re: RX-340 and Noise Reduction

To: <tentec@contesting.com>
Subject: [TenTec] Re: RX-340 and Noise Reduction
From: jimr.reid@verizon.net (Jim Reid)
Date: Sun, 17 Feb 2002 12:42:44 -1000
Earlier,  I wrote,  in part:

> Therefore,  I suspect the Orion will also have a 45.455 mHz
> IF (note the 455 part which is the 2nd IF frequency),  and
> will have the same needed pair of crystal filters,  one on
> the input,  the other on the output of some gain stages within
> the 455 kHz IF strip.  These filters are 16 kHz wide in the 340;
> may be only 8 kHz in the Pegasus.

Well,  maybe the filters in the Pegasus are 12 kHz wide,
as that is the 3rd and final IF center frequency within
the Peg.  So the DSP processor is fed digital info via
a 12 kHz A to D converter.  In the 340,  the final IF is
centered at 16 2/3 rds kHz.  The D to A converter in
the 340 produces a serial data stream at a 66 2/3rd
kHz sample rate for input to the DSP processor.

Unfortunately,  this sort of tech info is absent from the
Pegasus manual I have.  So the mystery of the Orion
frequency plan must await more info from Ten Tec for
satisfying our curiosities,  hi.  

73,  Jim  KH7M

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