Leif M 2024/11/19 11:15
A quick question. Before I make mess of my calibrations, can I lower the S11 output power with an attenuator. Can I still measure amplifier inputs at 1-5MH. After calibration that is.
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10dB attenuator to lower output power, is it ok?
Leif M 2024/11/20 00:05
No quick questions or answers.
I tired waiting and tried it myself. I measured 150pF, 270 ohm and 18 ohm components, and got good results. I used low frequency, less than 5MHz , because that is easier.
Brian Morrison 2024/11/20 17:46
On Wed, 20 Nov 2024 00:05:15 -0800
"Leif M via groups.io" <leif.michaelsson=gmail.com@groups.io> wrote:
> No quick questions or answers.
> I tired waiting and tried it myself. I measured 150pF, 270 ohm and
> 18 ohm components, and got good results. I used low frequency, less
> than 5MHz , because that is easier.
The simple answer is that you can put the attenuator in but it will
reduce the dynamic range of an S21 measurement by 10dB and the dynamic
range of an S11 measurement by 20dB. This is after calibration.
This may be suitable for your purposes.
--
Brian Morrison
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