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A [hi]QUESTION FOR THE GURU'S[/hi]

A

Anonymous

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QUESTION FOR THE GURU'S
THE GP's have diferrent wave form to the SD's does any one Know it. I guessed Xmit is -15v to -5 back to -15 again repeating cycle. Balancing magnetic saturation effects. Some say the -5 is present in the sampling time helps keep the signal alive as well. How could one implement a Pi Xmit circuit to do this... may be worth looking into. Thanks to all
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Hi Little John,
I shall have a GP Extreme to look at tomorrow. I'll see if I can find the answers to your question.
Eric.
 
Hi Little John,
The GP Extreme has three short TX pulses and a long one. The three short pulses have an amplitude of about 13.5V and the long pulse 4.5V. This is probably the reason for the "dual voltage technology" on the side label.
My guess is that this equalises the TX current amplitudes in the coil. The SD2200, with the same three short and one long pulse, had lower peak currents for the short pulses as they were limited by the coil inductance (300uH coil and 0.4 ohms resistance).
Eric.
 
Eric..HI.
It seems this approach is better over standard pulse width control, It was found the SD 2200
 
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