[Elecraft] A datapoint comparing old vs new synthesizer

[Phil Wheeler]

Knut, if you're asking about the K3 with the new 
synthesizer in '"does it feel like an analog VFO" 
(with the 10Hz tuning step) like the old 
synthesizer?', I don't notice any change in the 
feel of tuning the radio.

Phil W7OX

On 3/12/15 7:36 AM, ab2tc wrote:
> Hi,
>
> One subject I haven't seen touched is the somewhat subjective "does it feel
> like an analog VFO" (with the 10Hz tuning step) like the old synthesizer?
> Technically that means fast settling, no overshoots, no skipped steps or
> resorting to a higher tuning step even when tuning fast. I have never had
> any problem with this in a real ham radio (IC-718, IC-7200, K3), but my
> portable Eton E1 is terrible in this regard. It's only use is to walk the
> street or take in the car for noise hunting. BTW it would be nice to see at
> least a block diagram identifying the major ICs used.
>
> AB2TC - Knut
>
>
> wayne burdick wrote
>> The new synth uses a hybrid DDS-PLL architecture running at a very high
>> frequency. Many newer transceivers use a DDS only. The PLL is critical to
>> low-noise (low-jitter) performance.
>>
>> The DDS-PLL subsystem is locked to the 49.380-MHz reference to within a
>> small fraction of a Hz over the entire tuning range.
>>
>> 73,
>> Wayne
>> N6KR
>> <snip>