On Mon, Jan 20, 2025 at 01:45 PM, Shirley Dulcey KE1L wrote:
The internal attenuator in the tinySA Ultra is an active device, and as such it causes some distortion.
It uses FET switches and measuring the tiny amounts of distortion produced by them is a very difficult undertaking involving carrier phase and amplitude cancellation techniques.? It will not be an issue in any normal measurements.
Use the attenuator it is an essential part of the instrument.?
Use of any LNA will decrease the dynamic range of the analyzer, only use it when other techniques (less attenuation, more averaging, narrow IF bandwidth) are not enough to dig your signal out of the noise.
73, Don N2VGU?
Donald S Brant Jr