The N2831A Series InfiniiMax III+ probing system is the next generation of InfiniiMax probing, greatly expanding the measurement capability and usability of a probe capable of measuring all the components of a differential signal. The built-in InfiniiMode technology allows customers to switch differential, single-ended, and common mode without adjusting probe tip connections.

The N2831A Series probe’s InfiniiMode provides the following mode of operation:

• A – B (differential)
• A – ground (signal singled A)
• B – ground (signal singled B)
• (A + B)/2 – ground (common mode)

The InfiniiMax III+ works with the full array of InfiniiMax III probe heads and supports the full bandwidth of the InfiniiMax III+.

Bandwidth

• 8 GHz (-3 dB)
• Tr = 54.25 psec (10-90%)

Input range

• DC attenuation ratio: 10:1 or 5:1
• Input voltage range: 2.5 Vpp or ± 1.25 V at 5:1 attenuation, 5 Vpp or ± 2.5 V at 10:1 attenuation
• Input common mode range: ± 7 VDC to 100 Hz, ± 1.25 V at >100 Hz at 5:1 attenuation, ± 2.5 V > 100 Hz at 10:1 attenuation
• Offset range: ± 16 V when probing a single-ended signal

Input impedance

• DC input resistance : R diff = 100 kiloohms ± 2%, R se = 50 kiloohms ± 2%
• Input resistance at > 10 kHz: R diff = 1 kiloohm, R se = 500 ohms
• Input capacitance : C diff = 32 fF, C se = 44 fF (with ZIF probe head)

Connectivity

• N2848A InfiniiMax III QuickTip probe head and N5445A InfiniiMax III browser
• N5439A InfiniiMax III ZIF probe head
• N5444A InfiniiMax III 2.92 mm/3.5 mm/SMA probe head
• N5441A InfiniiMax III solder-in probe head