[Elecraft] KTCXO3 obsolete?

[Matt VK2RQ]

Thanks Johnny. The reason I ask is that I saw it mentioned elsewhere that the new synth board is based on the Si570 chip. This chip runs on its own internal crystal oscillator, and does not have any input for an external reference clock. The Si571 does have a built-in TCXO, but I'm wondering how the external TCXO on the KTCXO3 works with this new synth board (maybe there is a frequency comparison done in DSP to work out a "frequency correction factor"?).

73, Matt VK2RQ

> On 20 Apr 2015, at 9:02 pm, Johnny Siu <vr2xmc at yahoo.com.hk> wrote:
> 
> Hello Matt,
> 
> I trust the KTCXO3 is to provide better stability of reference frequency.  I think you will need it for digital mode.
> 
> 73
> 
> Johnny VR2XMC
>  
> ¼Ä¼þÈË©U Matt VK2RQ <matt.vk2rq at gmail.com>
> ÊÕ¼þÈË©U "<elecraft at mailman.qth.net>" <elecraft at mailman.qth.net> 
> ‚÷ËÍÈÕÆÚ©U 2015Äê04ÔÂ20ÈÕ (ßLÒ») 6:52 PM
> Ö÷î}©U [Elecraft] [K3] KTCXO3 obsolete?
> 
> With the new KSYN3A modules now shipping in the K3, does it still make sense to equip a KTCXO3 module?
> 
> 73,
> Matt VK2RQ
> 
>