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.
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 10 in/25 cm with pluggable probe tips
- 012-0989-00 - 10-wire 5 in/12 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).
|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|