Abstract: A probe comprises a small “consumable” probe substrate permanently mounted to a circuit-under-test. The probe substrate includes a high-fidelity signal pathway, which is inserted into a conductor of the circuit-under-test, and a high-bandwidth sensing circuit which senses the signal-under-test as it propagates along the signal pathway. The probe substrate further includes a probe socket for receiving a detachable interconnect to a measurement instrument. Power is alternatively supplied to the probe by the circuit-under-test or the interconnect. When the interconnect is attached, control signals from the measurement instrument are supplied to the sensing circuit and the output of the sensing circuit is supplied to the measurement instrument. In one embodiment, the sensing circuit uses high-breakdown transistors in order to avoid the use of passive attenuation. In a further embodiment, the sensing circuit includes broadband directional sensing circuitry.

Abstract: A differential measurement probe has a ground clip system for electrically coupling outer shielding conductors of differential probing tips together. In one embodiment, the probing tips independently move vertically relative to each other with the ground clip system secured to each of the outer shielding conductors of the probing tips. In a further embodiment, the probing tips move both vertically and horizontally and the ground clip system has a spring wire member that is secured to the probe. The spring wire member is formed with various sections having various angles to each other that allows one section to slidably engage one of the outer shielding conductors on one of the probing tips and another section to slidably engage the outer shielding conductor of the other probing tip.

Abstract: A differential measurement probe has a ground clip system for electrically coupling outer shielding conductors of differential probing tips together. In one embodiment, the probing tips independently move vertically relative to each other with the ground clip system secured to each of the outer shielding conductors of the probing tips. In a further embodiment, the probing tips move both vertically and horizontally and the ground clip system has a spring wire member that is secured to the probe. The spring wire member is formed with various sections having various angles to each other that allows one section to slidably engage one of the outer shielding conductors on one of the probing tips and another section to slidably engage the outer shielding conductor of the other probing tip.

Abstract: A signal acquisition probe has a double cushioned spring loaded probing tip assembly disposed in a housing. A first compressive element produces a first pre-loaded compressive force and an increasing compressive force on the probing tip assembly and a second compressive element produces a second pre-loaded compressive force and an increasing compressive force on the probing tip assembly subsequent to the first increasing compressive force. First and second double cushioned spring loaded probing tip assemblies may be disposed in a housing to produce a differential signal acquisition probe.

Abstract: An inverted strain relief for receiving a coaxial cable has a housing with a bore therethrough defining first and second apertures in opposing surfaces of the housing. The bore surface is defined by at least a first radius scribing an arc from the perimeter of the first aperture to the second aperture. A smaller second radius scribes an arc tangential to the arc of the first radius over a portion of the exterior surface of the housing. Alternately, the first and second radii may define the surface of the bore with the second radius extending over a portion of the exterior surface of the housing. The bore in the housing is definable by an additional aperture formed adjacent to the first aperture. The surface of the bore is defined by at least the first radius extending from the perimeters of the adjacent apertures.

Abstract: A surface mount probe point socket has a housing with base and a socket extending from the base. The base has a length and width sufficient for attaching the housing to a circuit trace using an electrically conductive material while adding minimal inductance and capacitance to the circuit trace. The socket has a height and diameter for supporting a measurement probe in the housing while adding minimal inductance and capacitance to the measurement probe. A probe point contact is disposed in the bore of the socket for receiving a probe point disposed in the end of the measurement probe to secure the probe in the housing. Two surface mount probe point sockets may be joined together with an alignment gage and attached to adjacent circuit traces to produce a surface mount probe point socket system for differential measurement probes.

Abstract: A surface mount probe point socket has a housing with base and a socket extending from the base. The base has a length and width sufficient for attaching the housing to a circuit trace using an electrically conductive material while adding minimal inductance and capacitance to the circuit trace. The socket has a height and diameter for supporting a measurement probe in the housing while adding minimal inductance and capacitance to the measurement probe. A probe point contact is disposed in the bore of the socket for receiving a probe point disposed in the end of the measurement probe to secure the probe in the housing. Two surface mount probe point sockets may be joined together with an alignment gage and attached to adjacent circuit traces to produce a surface mount probe point socket system for differential measurement probes.

Abstract: A deskew fixture has a multilayer circuit board from which pairs of mirrored signal launch contact extend from both sides of the circuit board. One pair of contacts is coupled to electrical ground and the other pair is connected via equal length, electromagnetically coupled strip lines to a signal source. Probe holders are mounted on the circuit boards to support measurement probes with the probing contacts of the measurement probes coupled to the signal launch contacts. Additional pairs of signal launch contacts may be provided with one pair receiving a positive signal from the signal source and another pair receiving a negative signal via equal length, electromagnetically coupled strip lines from the signal source for deskewing differential measurement probes.

Abstract: A probe tip adapter for a measurement probe has at least a first electrically conductive element with a bore at one end and a probing contact formed on the other end. The bore of the electrically conductive element has an electrically conductive elastomer disposed therein having sufficient tensile strength, compression set, hardness, deflection force, elongation and percent recovery for repeatably securing the electrically conductive element to the probing tip of the measurement probe. The probing contact may be configured as a probing tip having a shaft that tapers at one end to a point and as a square pin adapter with a bore formed in the electrically conductive element that receives a spring contact. The probe tip adapter is useable with both single ended and differential measurement probes.

Abstract: A probe head holder for a measurement probe head has a probe head mount and a highly elastic, high hoop strength retention member that flexibly secures the measurement probe head to the probe head holder. The probe head mount has a first surface adapted to receive the measurement probe head and a second surface extending from the first surface having at least a first groove formed therein normal to the first surface. The retention member is positioned around the holder and the probe head with a portion of the retention member being disposed in the groove. The probe head holder may be attached to a probe arm of a probing station.

Abstract: A probe head holder for a measurement probe head has a probe head mount and a highly elastic, high hoop strength retention member that flexibly secures the measurement probe head to the probe head holder. The probe head mount has a first surface adapted to receive the measurement probe head and a second surface extending from the first surface having at least a first groove formed therein normal to the first surface. The retention member is positioned around the holder and the probe head with a portion of the retention member being disposed in the groove. The probe head holder may be attached to a probe arm of a probing station.

Abstract: A deskew fixture has a multilayer circuit board from which pairs of mirrored signal launch contact extend from both sides of the circuit board. One pair of contacts is coupled to electrical ground and the other pair is connected via equal length, electromagnetically coupled strip lines to a signal source. Probe holders are mounted on the circuit boards to support measurement probes with the probing contacts of the measurement probes coupled to the signal launch contacts. Additional pairs of signal launch contacts may be provided with one pair receiving a positive signal from the signal source and another pair receiving a negative signal via equal length, electromagnetically coupled strip lines from the signal source for deskewing differential measurement probes.

Abstract: A replaceable probe tip holder for an associated low capacitance probe head has a cap with a series of cavities formed therein and a bore extending from the inter most cavity to the front end of the cap. A first cavity receives the probe head tubular housing, a second cavity receives a portion of the probe head substrate extending from the housing, and a third cavity receives a first resilient compression member and a first electrically conductive probing tip having a shank and a head. The head is disposed in the third cavity in contact with the first resilient compression member and shank extends through the bore with the end of the shank extending from the front end of the cap. Attachment arms extend from the back end of the cap and are positionable on the outside of the housing. The replaceable probe tip holder may also be configured with differential probing tips having two electrically conductive probing tips extending from the cap.

Abstract: An attachable/detachable probe point for use with an electrical measurement probe includes a base having a aperture formed therein that extends through the base. An electrically conductive probing contact having at least a partially threaded body member and a pointed contact member is disposed in the aperture with a portion of the body member extending from the top surface of the base and the pointed contact member extendable from a first position within the aperture to a second protruding position outside the aperture at the bottom surface of the base. A compliant adhesive material formed on the bottom surface of the base for securing the attachable/detachable probe point to probing contact point.

Abstract: A variable spacing probe tip adapter for a differential measurement probe has a measurement probe head with first and second probe tips extending from the probe head. Ribs and grooves formed in the probe head that extend radially from around each of the probe tips. Each of first and second first probing tips have an electrically conductive shaft that has a bore formed in one end for engaging the probe tips of the measurement probe. Each shaft has ribs and grooves formed therein that extend radially from the bore for engaging the corresponding grooves and ribs in the probe head. The other end of the conductive shaft tapers to a probing point with and a portion of the shaft toward the tapered end of the shaft being angled such that the probing tips. The conductive shafts are rotatable on measurement probe tips and locked into position by the engagement of the ribs and grooves in the probe head and the probing tips.

Abstract: An electronic interconnect assembly has a high speed coaxial interconnect for a coaxial transmission line having a central signal conductor and a surrounding shield conductor. The coaxial interconnect has a male side and a female side, with the female side including a shield sleeve having a chamber that receives a male shield contact on the male side. The shield sleeve has a contact with a compliant portion that flexibly grips the male shield contact. A mechanical alignment facility includes a closely mating pocket and body, each attached to a respective male or female side of the interconnect. Additional data and power connectors may be included with the pocket and body.

Abstract: A probe tip adapter for a measurement probe has at least a first electrically conductive element with a bore at one end and a probing contact formed on the other end. The bore of the electrically conductive element has an electrically conductive elastomer disposed therein having sufficient tensile strength, compression set, hardness, deflection force, elongation and percent recovery for repeatably securing the electrically conductive element to the probing tip of the measurement probe. An element holder is positionable on the measurement probe and has a cavity formed in one end for receiving the measurement probe. At least a first bore is formed in the other end of the element holder extending to the cavity and aligned with the probing tip of the measurement probe. The electrically conductive element is positioned in the holder bore such that the probing tip penetrates the elastomer and the probing contact extends from the holder.

Abstract: A measurement probe includes a sacrificial assembly fixture as part of the probe head. The probe head has probing contact at one end thereof and a transmission cable extending from the other end thereof and includes a housing having interior surfaces with the probing contact disposed in one end of the housing and the transmission cable extending from the other end. A substrate is disposed within the housing and is electrically connected to the probing contact and the transmission cable. An alignment fixture has a base with deformable ribs formed on one surface thereof and opposing sidewalls extending from the base opposite the surface with the deformable ribs. Each sidewall has an interior surface with a channel formed therein at the exposed ends of the sidewalls for engaging the substrate.

Abstract: A probe adapter for coupling probe tip contacts of a electrical measurement probe to leads of a surface mounted integrated circuit IC device has an insulating housing from which extend first and second flexible electrically conductive leads having a pitch geometry compatible with the leads of the IC device. First and second electrical contacts, respectively coupled to the first and second flexible electrically conductive leads, are disposed in the housing and have a pitch geometry compatible with the probe tip contacts of the electrical measurement probe.

Abstract: A strain relief and pull-strength termination with controlled impedance for a transmission cable has a carrier with a flat portion for accepting one end of the cable and tabs extending from the flat portion. The cable is secured to the flat portion via soldering of the shielding conductor to the flat portion or by glueing. A housing having tabs formed therein receives the carrier. The tabs in the housing are bent down to engage the carrier tabs to provide strain relief and cable-pull strength.