InfiniiMode and Auto-Selected Input Attenuation
InfiniiMode allows convenient measurement of differential, single-ended, and common mode signals with a single probe tip without reconnecting the probe from its connection point. This is beneficial to save setup and connection time, reduce errors, and limit the number of scope channels in use.
The InfiniiMax Ultra probes have 3 attenuation ranges, 1:1, 4:1, and 8:1 giving you superior noise performance and large voltage ranges all while maintaining maximum bandwidth. Input range is automatically configured depending on the size of the input signal and the vertical scale of the scope. You have three flexible input dynamic ranges to choose from: 600 mVpp @ 1:1, 2.5 Vpp @ 4:1, and 5 Vpp @ 8:1.
Unique S-Parameter DSP Correction
InfiniiMax Ultra probe amps store its unique S parameters in on board memory for the scope to read out when the probe amp is connected to the scope. Unique S-parameters, as opposed to nominal, means each individual probe amp contains its own frequency response data to further flatten the magnitude and phase response of the probe for high accuracy measurements. When a probe is connected to a scope channel and the proper probe head is selected, the scope calculates a DSP correction filter that includes the probe head, probe amplifier, and scope channel. This provides the maximum measurement accuracy for the complete probe and scope channel system.
Two Methods for Correcting Probe Response
Most Keysight probes use one method for correcting probe response without additional software, but now you can natively choose which method you want with a push of a button: True View and Source Estimate.
True View (V out / V in) – shows voltage at the tip of probe as loaded by the probe:- Pros: More accurate representation of the signal that currently exists, as it is being probed; Better for receiver sensitivity
- Cons: Doesn’t estimate signal that was there before being probed; Shows probe loading
- Source Estimate (V out/V source) – estimates voltage at probe point as if not there (assumes 25Ω source impedance)
- Pros: More accurate when system source impedance is known; Better for transmitter testing
- Cons: Error in receiver testing; Hides the effect that probe loading has on signal being probed
Probe Heads and Accessories for Varied Applications
Keysight’s InfiniiMax Ultra probe amplifiers support a wide variety of high-speed probing applications with an extensive line-up of probe heads and accessories. The InfiniiMax Ultra probes are compatible with all existing InfiniiMax RC probe heads, but we especially recommend the following probe heads.