Art (NWOH)
New member
The basic problem with pinpointing a Sov is...
Failure to understand that this is a motion detector ONLY. It does not have a no motion pinpoint.
SOUND AND MOTION !!!!
Control the coil movement as you listen to the audio. Watch how the coil is moving over the ground.
You must control the speed, width, and center point of the sweep....while listening.
First poor drawing shows the relationship between the coil motion, sweep width, audio, and position of the target when the target is to the right of the sweep center. Reverse the drawing for how it works with the target to the left of the center of the sweep.
Note that the peak audio does NOT occur when the coil is centered on the target.
The second pic shows what happens when the sweep is the right width AND centered over the target.
Note that the audio rolls up on either side of center equally . The target is in the 'valley' between the audio peaks.
You do not need to reach the peak in audio with your sweep width...You only need to control the sweep to get the audio to roll up equally on the left and right sides of the sweep.
How you want to finish the pinpoint is up to you.....By the 'X' method or off the tip. Or work the coil forward and back while keeping the audio centered up to determine when you have it right under the center.
Some coils may not pinpoint exactly center. They may be consistently be off a little in some direction. You have to learn the coil.
Hope this helps.
HH
Failure to understand that this is a motion detector ONLY. It does not have a no motion pinpoint.
SOUND AND MOTION !!!!
Control the coil movement as you listen to the audio. Watch how the coil is moving over the ground.
You must control the speed, width, and center point of the sweep....while listening.
First poor drawing shows the relationship between the coil motion, sweep width, audio, and position of the target when the target is to the right of the sweep center. Reverse the drawing for how it works with the target to the left of the center of the sweep.
Note that the peak audio does NOT occur when the coil is centered on the target.
The second pic shows what happens when the sweep is the right width AND centered over the target.
Note that the audio rolls up on either side of center equally . The target is in the 'valley' between the audio peaks.
You do not need to reach the peak in audio with your sweep width...You only need to control the sweep to get the audio to roll up equally on the left and right sides of the sweep.
How you want to finish the pinpoint is up to you.....By the 'X' method or off the tip. Or work the coil forward and back while keeping the audio centered up to determine when you have it right under the center.
Some coils may not pinpoint exactly center. They may be consistently be off a little in some direction. You have to learn the coil.
Hope this helps.
HH