Double sided probing structures

A probing structure comprising:

• (a) a holder for supporting a device under test being maintained in one of a horizontal and a vertical orientation;
• (b) a calibration substrate including a calibration structure surface being maintained in an orientation substantially perpendicular to said one of said horizontal and said vertical orientation;
• (c) a probe element including a contacting portion;
• (d) a probe positioner supporting said probe element, said probe element supportable in a first orientation enabling said contacting portion to engage said calibration structure surface and, alternatively, supportable in a second orientation enabling said contacting portion to engage said device under test, wherein said probe positioner changeable from said first orientation to said second orientation without being capable of probing at all of the intermediate orientations between said first orientation and said second orientation;
• and
• wherein said probe positioner comprising a stand and a pivot block hingedly connected to said stand, said stand comprising an adjustment mechanism enabling translation of said pivot block in at least one direction without movement of said stand.