PI TX Settling

[Old cart]

Tried charting target decay during coil current on and off. Tx(100usec CC) about 10usec ramp before constant current(90usec). Current is in a servo loop. The loop was to control constant rate during coil on time for ferrous non ferrous indication. To noisy for looking at amplifier out during coil on constant current. Good enough for what I'm charting. Charted absolute value(target signal recording- no target signal recording). 1 troy oz. 99.9% pure copper coin. I would be interested in what ground decay would look like during the constant current on time. Would need to improve constant current loop to chart it. Maybe someone could say what to expect and how it would effect GEB. Tx(1000pps)

Could you also also do a chart of ground using the same techniques?

[green]

Could you also also do a chart of ground using the same techniques?

S/N isn't good enough with my bench detector to chart the ground sample while at constant current. Might have some ripple current that I don't see on the scope exciting the reactive component.

[green]

I agree the simulation is not going to capture real-life nuances because of the over-simplified target model. But it does provide some good insight. Stage 2 of this investigation is to build a test circuit with a double-acting TX driver and 2 RX demods. I want to measure target responses for both TX cases exactly simultaneously.

Have you tried stage 2? Have you changed your opinion on constant current vs constant rate?