Keysight U7233A Testing Notes page 185

Keysight U7233A/U7233B DDR1 Compliance Test Application
Compliance Testing Methods of Implementation
14 InfiniiMax Probing
Figure 66
Keysight recommends 116xA or 113xA probe amplifiers, which range from 3.5 GHz to 12 GHz.
Keysight also recommends the E2677A differential solder-in probe head. Other probe head options
include N5381A InfiniiMax II 12 GHz differential solder-in probe head, N5382A InfiniiMax II 12 GHz
differential browser, E2675A InfiniiMax differential browser probe head, N5425A InfiniiMax ZIF probe
head and N5426A ZIF Tips.
Figure 67
1134A InfiniiMax Probe Amplifier
E2677A / N5381A Differential Solder-in Probe Head