Minelab GPX Timings

[Dean Mortimer]

15 years too late. Tried to teach people about RX and the functionality of other settings at the shop but everyone assumes they lose depth if they deviated away from the coiltek settings. But its good to see this SP guy trying to help people understand their machines - but eventually most people will revert back to there old ways and settings that they once were successful with in the early days when there was more gold around.

 

[gef12]

Ok! So what do the timings do? 8us, 10us plus Seta plus dual volt technology?
What is seta and dual volt technology?

Matt T

On a PI ( Pulse Induction ) detector, the signal from the coil is initially amplified by the ultra low noise front end amplifiers and some time after the large transmit current pulse is stopped, a sample of the amplified coil signal is taken. Since there is no transmitting going on at the time of the receive sample on a PI, timing is generally done by waiting a finite time after the termination of the large current pulse and then taking a sample. In this way, there is a form of synchronization also.

The time between when the TX pulse quits and the Rx sample is taken is often referred to the pulse delay time. The pulse delay time on most Gold PI detectors is 15 uS or less. A delay of 10 uS will show a distinct improvement, especially to very small gold in the few grain range over a detector having a delay of 15 usec. So in saying that the SDC and most likely the 6000 would be in the range of 8uS to 10uS. This timing makes it ideal for very small nuggets. On the other hand the greater the timing the better it is for larger nuggets.

 

[Jaros]

Just to clarify the "u" means microseconds -millionths of a second.-not to detract from the post of course.