[time-nuts] Re: Fwd: Re: Re: ammonia, cesium, masers, etc.

[paul swed]

I have a 8565a that also appears to go that high with internal mixers. But
was thinking it was going to be tough to understand the dip. Maybe not.
Regards
Paul

On Wed, Sep 22, 2021 at 12:51 AM ed breya <eb at telight.com> wrote:

> I was just looking at a HP8566, and found that it can reach the right
> range, right on the hairy edge of its capability. It's specified range
> is to 22 GHz, but you can tell it to go up to 24 GHz stop frequency -
> beyond that it will ignore numeric entries, or adjust the other
> parameters to limit it there. So, you can say, set the center to the
> 23.870 GHz or so, and span up to 200 MHz (slightly more actually), for
> wide searching for absorption frequencies. This puts the top frequency at
> 23.97 GHz, without being rejected or
> altered. So, it's in uncharted and unspecified territory, but it does
> cover the desired range, without resorting to external mixers. This
> gives a fairly wide-band view with noise floor around -60 dBm.
>
> It looks like you can narrow things down enough to reach -70-80 dBm, at
> reasonable rep rates.
>
> Ed
>
>
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