Browse Prior Art Database

Error Detecting Probe

IP.com Disclosure Number: IPCOM000085880D
Original Publication Date: 1976-Jun-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Hennet, PP: AUTHOR

Abstract

Described is a measurement probe 10 with error detection. The error detection is implemented within the probe. It enables such problems as noise pickup, probe malfunction, strobe misalignment and probe disconnect from the reference points to be detected and indicated prior to and separate from the host monitor.

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Error Detecting Probe

Described is a measurement probe 10 with error detection. The error detection is implemented within the probe. It enables such problems as noise pickup, probe malfunction, strobe misalignment and probe disconnect from the reference points to be detected and indicated prior to and separate from the host monitor.

In the figure, two signal lines 12 and 13 (one positive, one negative) and an error sensing line 14 are provided from the probe amplifier/ driver head 10 to the probe connector 11. The error sensing network in the head 10 detects probe disconnect, weak signals, and driver malfunction.

The lines 16-21 to and from a probe connector 15 are logically connected, as shown in the figure, to detect and indicate noise pickup, head malfunction and strobe misalignment. A valid signal on line 16 is passed thru the connector 15 and on to the host monitor. The strobe line 17 detects the input line signal changing levels during the strobe time to signal an error condition.

Any error condition is indicated via an indicator on the connector 15 and is also sent to the host monitor on error line 18. Reset to the error condition latch is by the external signal line 19 from the host monitor or by the push-button switch on the probe connector 15. Lines 20 and 21, respectively, provide probe voltages, including the shield level.

These functions incorporated in a measurement probe will aid in the monitor attachment procedure and validation.

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