I noticed something which I had never taken into account before that occurse with ALL Tesoro machines.
If you have a large target, then the frequency of the transmit signal changes, as it would as Tesoro only use a simple Colpitts oscillator in most cases.
Now, and maybe Dave J. could throw some light on this for me. By the same token, surely all the front end circuitry is designed to measure the phase shift of a target at a certain frequency, but this shift will cause inaccuracies to occur as the frequency changes, so the target phase response changes.
I think what I'm trying to say is that unless you use a Xtal oscillator, then inherently your disc circuit is going to change it's reference point and thus it's "response" to an object, depending on what the object is.
OR, is this a feature that Tesoro use and understand, and if so, can you explain why this systems is used?
I've looked at the math but can't derive a formula to predict the response....Yet!
If you have a large target, then the frequency of the transmit signal changes, as it would as Tesoro only use a simple Colpitts oscillator in most cases.
Now, and maybe Dave J. could throw some light on this for me. By the same token, surely all the front end circuitry is designed to measure the phase shift of a target at a certain frequency, but this shift will cause inaccuracies to occur as the frequency changes, so the target phase response changes.
I think what I'm trying to say is that unless you use a Xtal oscillator, then inherently your disc circuit is going to change it's reference point and thus it's "response" to an object, depending on what the object is.
OR, is this a feature that Tesoro use and understand, and if so, can you explain why this systems is used?
I've looked at the math but can't derive a formula to predict the response....Yet!
Comment