Picoprobe Model 7 was designed as a companion probe to Picoprobe Models 12C and 18C for driving integrated circuit lines so the Models 12C or 18C can be used to measure the response of adjacent nodes. The Model 7 consists of a flexible six foot, 50 ohm coaxial cable accurately terminated to 50 ohms in order to avoid undesirable reflections. A special miniature connector receives replacement coaxial probe tips that provide a shielded environment to within three millimeters of the fine tungsten probe point, thus minimizing capacitive coupling to other parts of the circuit. The replaceable coaxial probe tips are offered in various point sizes and can also be bent to any shape in order to accommodate a variety of probing geometries.
Picoprobe Model 7A, an unterminated version, can be used for capacitance and resistance measurements or in low to medium speed signal applications where a 50 ohm termination is not required. A flexible coaxial cable of six feet in length is standard on the Model 7A; however, when used for capacitance measurements GGB Industries, Inc., recommends using a shorter three foot cable. If the shorter coaxial cable length is desired for capacitance measurements, please specify it as Model 7A-3ft when ordering.