70 | Keysight | Probing Solutions for Logic Analyzers - Data Sheet
Probing Solutions for 40-pin Logic Analyzers
Custom Probing
Low density, moderate performance
Table 8. Twenty-pin connectors for fixed configuration probing.
(Requires isolation adapter)
solutions shown in the “High-Density,
High-Performance” (page 62) section
of this document can be used in
Keysight part number
1251-8106
3M part number
2520-6002
2520-5002
Connector description
20-pin, low-profile (straight)
20-pin, low-profile (right-angle)
place of the solutions described here.
Keysight recommends standard 0.1 inch
center connectors for normal density
applications if the loading/speed is not
a significant issue. Many of these items
are available from 3M or Keysight (see
Table 8). See the “Related Information”
section at the end of this document for
3M address information.
1251-8473
Direct connection through
isolation adapter
Isolation adapters (Keysight part number
01650-63203) that connect to the end of
the probe cable are designed to perform
two functions. The first is to reduce the
number of pins required for the header
on the target board from 40 pins to 20
pins. This process reduces the board area
dedicated to the probing connection.
The second function is to provide the
proper RC networks in a very convenient
package. Figure 9.36 illustrates how the
isolation adapter physically connects to
the target system and the equivalent load
of the isolation adapter connected to a
Keysight logic analyzer. Figures 9.37 and
9.38 show the pinout diagrams for the
probe cable and the isolation adapter,
respectively. There are two 20-pin
Logic analyzer pod cable
Isolation adapter
(Keysight 01650-63203)
20-pin connector
(Keysight 1251-8106)
Isolation adapter RC network
k
Equivalent load
connectors, along with their Keysight and
3M part numbers, listed in Table 8.
100 k
Figure 9.36. Isolation adapter (01650-63203) and equivalent load.
1. The Keysight 01650-63203 saves space by
using a common ground (see Figure 4.5). This
will impact signal fidelity, especially faster
transition times (< 4 to 5 ns).
KEYSIGHT [ Keysight Technologies ]
