[Elecraft] Update to KSYN3A FAQ (some measured dynamic range numbers)

[Johnny Siu]

I must admit that understanding those figures are beyond my knowledge.  In practical terms, if I can now hear a below S1 cw weak signal 10KHz away from a S9+60db station before upgrade, what will be the improvement after the installation of KSYN3A assuming operating under the same condition?
Such a demonstation was given to me when I visited Icom HQ in Osaka last year in the announcement of the IC7850/IC7851.  Again, IC7850 is known foir extremely low phase noise.
Can any elecrafters interpret the improvements in an understandable layman terms?
73
Johnny VR2XMCK-Line + KX3 + HR50
       寄件人︰ Wayne Burdick <n6kr at elecraft.com>
 收件人︰ Elecraft Reflector <elecraft at mailman.qth.net> 
副本(CC)︰ "Elecraft_K3 at yahoogroups.com" <elecraft_k3 at yahoogroups.com> 
 傳送日期︰ 2015年02月14日 (週六) 7:34 AM
 主題︰ [Elecraft] Update to KSYN3A FAQ (some measured dynamic range numbers)
   
Hi all,

I've updated the KSYN3A FAQ with the following information regarding testing of a K3 with the new synthesizer performed by Rob Sherwood, NC0B.

* * *

Q: What is the approximate 2-kHz dynamic range (IMDDR3) of the K3 when using the new synthesizer?

A: Our tests show in excess of 105 dB with the narrowest filters, though there are many factors, and this should be considered approximate. (A very robust test setup is required to make these measurements.) Rob Sherwood tested a K3 with a KSYN3A and obtained the following results:

    2-kHz IMDDR3 with 200-Hz roofing and DSP filter = 106 dB
    2-kHz IMDDR3 with 400-Hz roofing and DSP filter = 103 dB

Rob will be posting this information in his receiver performance chart (http://www.sherweng.com/table.html) after he completes his full suite of tests.

* * *

The above numbers were used with Rob's permission.

73,
Wayne
N6KR

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