At 11:27 AM 1/6/03 -1000, you wrote:
>Hi,
>
>Have just noticed that the TT folks have now "updated" the
>published specs on the important dynamic range numbers.
>Now list at the Orion web site the following:
>
>"IP3: +25 dBm typical, 20-kHz spacing at BW=2.4 kHz, pre-amp off;
>+24 dBm typical, 5-kHz spacing, BW=500 Hz, pre-amp off.
>
>IMD3 dynamic range: 101 dB typical, pre-amp off, 20-kHz and
>5-kHz spacing.
>
>IP2: +75 dBm typical."
>
>Note IMD3 number: 101 typical; that is the best number I have
>ever seen a manufacturer put down, even as "just" a typical
>for a commercial rig!! This indicates that the front end, analog
>stages of the rig are as good, or better than those in the famed
>TT rcvr, the RX-340. The DSP stages by themselves, down
>at the last IF, have a range of about 103 dB, per Doug Smith;
>so there is a typical "degradation" of only a couple dB by the
>preceding analog, wide open, AGC free and AGC'd stages
>(that is, to those stages following the operator selectable
>roofing filter).
Hi:
You folks don't miss a trick, as some updated numbers
were just put onto the web site this morning.
Keep in mind those are 5 kHz spacing numbers - if comparing
these to other radios, use the comparable spacing. The ARRL
started using 5 kHz and 20 kHz numbers in their Product
Reviews with the TS2000 review in July 2001.
Some subtle changes - and the changes reflected were
done for theoretical vs. actual measurements. When we
originally posted the numbers several months ago, no
Orion physically existed to be able to verify what we
were claiming. Now that we have a number of built units
that have been thoroughly tested, we were able to verify
our claimed numbers with actual units in the engineering
lab. It appears that the radio might actually exceed some
of the earlier claimed specs we have published (!)
We are hopeful to publish some meaningful additional
numbers in the future, like 1 kHz spacing dynamic range
and third order intercept numbers. Doug Smith, Jack
Burchfield and the rest of the lab have been running
even more testing this week.
>Note also that we are going to be able to adjust the AGC
>parameters!
>This is really going to be quite a wonderful rcvr, it appears!
Yes - AGC is fully adjustable. No more FAST, MED,
SLOW, OFF only (though those choices are available too).
Something like 1 million possible combinations for attack,
hang and decay time. This can also be written as a
'profile memory' to be kept for instant recall by the operator.
Rigs are coming soon.
Scott Robbins, W4PA
Amateur Radio Product Manager
-----------------------------------------------------------------
Ten-Tec, Inc., 1185 Dolly Parton Pkwy, Sevierville, TN 37862 USA
Contact Mon-Fri Eastern: Office/Tech (865) 453-7172 9 am-5 pm.
Repair (865) 428-0364 8-4. Sales (800) 833-7373 9 am-5:30 pm.
Fax (865) 428-4483 24 hrs. Visit us at <http://www.tentec.com>
Email: New product sales/product info sales@tentec.com
Service department service@tentec.com
While we make every effort to answer email in an expedient manner,
the telephone is a much more efficient tool for getting a quicker and
more complete answer to your inquiries. Thanks!
|