This module covers the key hardware differences between the 4425 and 4423, and how those changes affect your workflow and hookup logistics.

Hardware changes covered include:

• 100 MHz ADC per channel (combinable up to 400 MHz on a single channel)
• 256 million sample memory (up from 32 million)
• 200V input range
• 10:1 attenuators with 8 MΩ input impedance
• Floating ground inputs with up to 30V differential between channels
• 20 kHz hardware bandwidth limit option
• Connect Detect feature

The bulk of the module focuses on how the increased memory dramatically improves block mode performance, and how to take advantage of that with appropriate streaming mode transition settings. Tom walks through practical capture strategies for intermittent faults, including when to use block mode versus streaming mode depending on whether the vehicle stalls or stumbles.

The floating ground inputs get significant attention, including what you can now do that wasn't possible with the 4423, and the hookup rules you must follow to avoid grounding out sensors or crossing signals between channels.

Note: Watching the 4423 Power Management module first is recommended before this one.