HP 34970A manual Gnd Ttl Ac

Chapter 8 Tutorial

Multifunction Module

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Totalizer	Software
On / Off	Reset

+

Input Signal (1V to 42V)

–

Counter

Signal

Conditioning

G

Gate

Input

G

GND

TTL AC

Threshold Jumper

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∙Using the hardware jumper labeled “Totalize Threshold” on the module, you can control the threshold at which an edge is detected. Move the jumper to the “IL” position to detect changes through

0 volts. Move the jumper to the “ddV” position (factory setting) to detect changes through ddV threshold levels.

2.5 V Threshold (TTL)

0 V Threshold (AC)

∙The maximum count is 67,108,863 (28< -1). The count rolls over to “0” after reaching the maximum allowed value.

Data

Module Reference

8

9A;