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>
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