Follow up. I've acquired the necessary attenuators and I'm getting a
mismatch error from the amplifier suggesting too much refelcted power. The
cortab instructions for the 1000W amp are to bypass the preamp and use a
100W 62dB worth of attenuation.
I've achieved it with the parts below.
https://www.fairviewmicrowave.com/15db-fixed-attenuator-n-male-n-female-2-watts-sa3ns-15-p.aspx
https://www.fairviewmicrowave.com/40db-fixed-attenuator-n-male-n-female-100-watts-sa3n1007-40-p.aspx
These are the amplifiers getting me to 55dB and then I use a 10dB cyclic
step attenuator for another 7dB. Total 62 dB.
Any idea where to go from here? What might be causing the reflected power
problem?
On Wed, Dec 19, 2018 at 3:09 PM Kenneth Knott <kknott_at_vt.edu> wrote:
> I need to Cortab or Linearize my amplifiers on my SSNMR system for some
> less common nuclei. I know Bruker can do this, but I'm sure my colleagues
> in academia have managed to put some things together to do it themselves.
>
> As an example, Cortab tells me I need 58dB 40W of attenuation. This is
> not something easily found off the shelf. I already have a 40dB 100W
> attenuator. Can I piggy back another 20dB attenuator? Does it still need
> to be 100W at this stage?
>
> If you have a setup you use for this purpose in your lab, please let me
> know.
>
> Thanks!
>
> --
> Ken Sharp-Knott
> Department of Chemistry
> Analytical Services
> Virginia Tech
>
> (540)267-6502 (Cell)
> (540)231-0885 (Office)
>
--
Ken Sharp-Knott
Department of Chemistry
Analytical Services
Virginia Tech
(540)267-6502 (Cell)
(540)231-0885 (Office)
Received on Wed Feb 13 2019 - 10:31:06 MST