At 10:51 PM 7/26/05, you wrote:
>Hi Everyone,
>
>I wonder if Scott or someone at Ten Tec could elaborate on this sentence
>taken form the Orion II announcement on the TT web site.
>
>"Mixing architecture for the analog stages has been rearranged to provide
>self-correction for frequency stability."
From what I understand, there is now a small self-correcting routine in
the analog stages that involves the
3rd IF and its LO being changed slightly to keep the radio on frequency a
little bit better. Note we're
discussing stability and not accuracy - it's to keep the radio on the
frequency, not to put it closer to what
should be the actual frequency the rig is using.
>Also will the roofing filters be of a different design or simply the same
>filters just 'banked' differently in the radio.
They are different. They are filters being built in the UK for
us. They're also arranged
into a single bank rather than dual banks as used in the original
rig. There is probably no
difference on receiver performance on SSB - on CW with the 600 or 300 Hz
filters
engaged maybe a slight improvement of dynamic range over the filtering
system used in
the original Orion. We've characterised it as 'subtle' - and it is. The
ARRL noted in the
Expanded Test Report for the Orion that with the 500 Hz filter engaged they
saw a
3 to 5 dB difference from the 1 kHz filter - the idea with the new
filtering system was
to smooth this out.
>Finally any plans for an 'auxiliary monitor provision' as with the ICOM
>and YAESU flagship transceivers?
No plans to add aux monitor output.
More to come...
Scott Robbins W4PA
Amateur Radio Product Manager, Ten-Tec, Inc.
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