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Tekprobe BNC connector: Difference between revisions
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The '''Tekprobe BNC''' interface was introduced in 1986 and is widely used in 1990s Tektronix equipment to interface active probes (e.g. the [[P6243]]) to oscilloscopes. Its a downward compatible successor to the [[BNC_connector_with_readout_ring | BNC connector with readout ring]]. | The '''Tekprobe BNC''' interface was introduced in 1986 and is widely used in 1990s Tektronix equipment to interface active probes (e.g. the [[P6243]]) to oscilloscopes. Its a downward compatible successor to the [[BNC_connector_with_readout_ring | BNC connector with readout ring]]. | ||
It consists of a plain [[BNC connector]] that allows traditional BNC based connections such as from passive probes. | It consists of a plain [[BNC connector]] that allows traditional BNC based connections such as from passive probes. (See [[Patent US 4708661A]].) | ||
This connector is surrounded by contact pads carrying power and data. The two larger pad areas match the | This connector is surrounded by contact pads carrying power and data. | ||
simple resistive readout pins on probes from the [[7000 series scopes|7000 series scope generation]] (e.g. | The two larger pad areas match the simple resistive readout pins on probes from the | ||
a ×10 probe will connect this pad to ground through 11 kΩ, or short it to ground when the Identify button | [[7000 series scopes|7000 series scope generation]] (e.g. a ×10 probe will connect this pad | ||
is pressed — see [[7000 series readout system]] for details). The smaller pads carry +15 V, +5 V, −5 V and −15 V | to ground through 11 kΩ, or short it to ground when the Identify button is pressed — see | ||
power, an offset voltage (-1 V to +1 V) supplied and controlled by the mainframe, and a clock/data signal pair for serial | [[7000 series readout system]] for details). | ||
The smaller pads carry +15 V, +5 V, −5 V and −15 V power, an offset voltage (-1 V to +1 V) | |||
supplied and controlled by the mainframe, and a clock/data signal pair for serial communication | |||
between the mainframe and "smart" probes. Probes are allowed to draw max. 1.25 W, max. 75 mA | |||
from the ±5 V rails, and max. 25 mA from the ±15 V rails. | |||
A [[Tekprobe SMA connector|similar standard]] exists based on [[SMA connector]]s, suitable for higher frequencies. | A [[Tekprobe SMA connector|similar standard]] exists based on [[SMA connector]]s, suitable for higher frequencies. | ||