Re: what is wrong with RF people?

On 10/30/2024 6:53 PM, Cursitor Doom wrote:

On Tue, 29 Oct 2024 16:17:58 -0700, john larkin wrote:
 

On Tue, 29 Oct 2024 18:56:34 -0400 (EDT), Martin Rid
<martin_riddle@verison.net> wrote:
>

john larkin <jl@glen--canyon.com> Wrote in message:r

https://www.digikey.com/en/products/detail/macom-technology-solutions/

MASW-007107-TR3000/4429770Apparently

"DC" means 2 GHz to these people. They test it with 8 pFseries caps on
the input and output.I once used a Maxim part rated DC to 10 GHz, that
absolutely screwedup below 100 MHz.A lot of "DC" parts are actually
characterized down to 9 KHz, becauselots of spectrum analyzers only go
that low.Grrrrr.

>
O yes,  they are different. No one would really understand,  until
you work with one.
>
Cheers

>
I found one Pericom RF switch that is "True DC to 8 GHz", which may be
an improvement.
>
So DC means AC, but "True DC" means DC in the RF world.

 ISTR being told here that 40Mhz was "practically DC" (but I suppose today
it probably is!)

I thought it might be 100MHz. After all, the wavelength is almost 10 feet long!