Tekprobe BNC connector: Difference between revisions

Tekprobe BNC connector (view source)

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 [[File:Tekprobe_2_interface.png|250px|thumb|right|Tekprobe-BNC interface]]
-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.
+It is a downward-compatible successor to the [[BNC connector with readout ring]] used in earlier instruments like the [[7000 series scopes]].
 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 simple resistive readout pins on probes from the
+The two larger pad areas match the simple [[BNC connector with readout ring|resistive readout pins]], with division factors encoded as resistance to ground, although TekProbe BNC-era instruments accept values that earlier instruments did not.
-[[7000 series scopes|7000 series scope generation]] (e.g. a ×10 probe will connect this pad
-to ground through 11 kΩ, or short it to ground when the Identify button is pressed — see
+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.
-[[7000 series readout system]] for details).
+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.
-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.