P6451: Difference between revisions

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It presents nine balanced signals back to the input section of the analyzer − 8 data channels, plus a 9<sup>th</sup> channel that is used either as a clock or as a qualifier.   
It presents nine balanced signals back to the input section of the analyzer − 8 data channels, plus a 9<sup>th</sup> channel that is used either as a clock or as a qualifier.   


[[File:P6451-equiv.jpg|thumb|300px|right|Channel equivalent circuit (click to enlarge)]]
The P6451 has the ability to set different threshold voltages for each of three channel groups − 1-4, 5-8, and the 9th (called 'C' in the manual).  
The P6451 has the ability to set different threshold voltages for each of three channel groups − 1-4, 5-8, and the 9th (called 'C' in the manual).  



Revision as of 10:55, 20 June 2017

The Tektronix P6451 is an 8+1 channel active logic probe designed for use with the 7D01, 7D02, DL502, LA501A, WR501, 308, 318, and 338. It presents nine balanced signals back to the input section of the analyzer − 8 data channels, plus a 9th channel that is used either as a clock or as a qualifier.

Channel equivalent circuit (click to enlarge)

The P6451 has the ability to set different threshold voltages for each of three channel groups − 1-4, 5-8, and the 9th (called 'C' in the manual).

The only active components are two 155-0137-00 custom hybrid pre-amp/comparator modules containing comparators with FET inputs and differential ECL outputs that can drive terminated 100 Ω lines. The instrument input would contain differential ECL receivers like the 10115 or 10216.

Input lead sets (same as for the P6406):

  • 012-0747-00 - standard 10-wire 25 cm with pluggable probe tips
  • 012-0655-01 - ten individual 40 cm leads
  • 012-0655-02 - ten individual 8 cm leads
  • 012-0670-00 - ten individual 16 cm leads
  • 012-0800-00 - 10-wire 10 cm

The probe-side input connector is a standard .65 mm square pin header on a 0.2" (5.08 mm) pitch so it is also possible to use standard jumper wires with pins, sockets or clips on the other end for connecting inputs.

Part numbers for the P6451 are 010-6451-03 (straight connector) or 010-6451-05 (90° connector e.g. for 308).

Key Specifications

Maximum Voltage ±40 V nondestructive
Input impedance 1 MΩ // 5±1 pF (without input leads)
Delay time 17±2 ns with ±1 V input and threshold at 0 V
Power 5 V, 260 mA

Manuals

Links

Pictures