Keysight Technologies 1130B Series, User Manual

Page: 73 / 234

Using Probe Heads
2
1130B-Series Probes User’s Guide 73
12. E2678B Differential Socketed Head with Header Adapter
This probe configuration can be used to connect to 25 mil square pin headers with
100 mil spacing such as those used in USB testing. The header adapter is
recommended for use with the 1130B and 1131B InfiniiMax probes.
All of the specifications and characteristics of the header adapter are the same as
those for the socketed differential probe head except for the input capacitance
shown in Table 25 .
To adapt the 01130-21303 damped wire accessory from solder-in to plug-on,
solder the tip into the 01131-85201 square pin socket and then slip the
01131-41101 heat-shrink sleeve over the solder joint and heat the heat-shrink
tubing with a heat gun. This allows the damped wire accessories to be used to
plug onto 25 mil square pins.
Figure 44 01130-63201 Header Adapter Dimensions
NOTE
If the header adapter is used with higher bandwidth probe amplifiers such as the 1132B (5
GHz) or the 1134B (7GHz), the rise time of the input signal should be slower than ~150 ps
(10% to 90%) to limit the effects of resonances in the adapter.
NOTE
The E2678B is a direct replacement for the E2678A that provides a more robust connection
between the E2678B head's socket and printed circuit board. The E2678B’s performance and
fit are identical to that of the E2678A.
Table 25 Characteristic Capacitance
Identification Capacitance Description
Cm 0.43 pF Model for input C is Cm between the tips and Cg to ground each tip
Cg 0.54 pF
Cdiff 0.70 pF Differential mode capacitance is Cm + Cg/2
Cse 0.97 pF Single-ended mode capacitance is Cm + Cg