[time-nuts] Does a frequency counter locked to GPS need to "warm up"?

[Scott McGrath]

Yes,   You have removed the reference from the warmup but the input circuits still need time to reach thermal equilibrium for most accurate results



On Feb 8, 2018, at 3:34 AM, Azelio Boriani <azelio.boriani at gmail.com> wrote:

No warmup needed if the counter switches to the external reference. If
the counter uses the external reference to lock the internal one then
it is better to wait until the internal one is stable, maybe the
counter has a standby mode where it appears powered off but the
internal reference is active (usually an ovenized reference). For the
best performance (stability of trigger levels, input amplifiers and so
on) it is better to warmup the whole counter always.

> On Thu, Feb 8, 2018 at 8:33 AM, Chris Wilson <chris at chriswilson.tv> wrote:
> 
> 
>  08/02/2018 07:31
> 
> Does  a  frequency  counter  connected  to a permanently running (Trimble Thunderbolt) GPS
> disciplined frequency standard need to warm up after switch on before readings settle?
> Just curious, thanks.
> 
> --
>       Best Regards,
>                   Chris Wilson.
> mailto: chris at chriswilson.tv
> 
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