Agilent Technologies HP 1660E Series User Manual page 260

Logic Analyzer Reference
Probing
The Termination Adapter
The logic analyzer must be properly terminated to operate correctly.
Most HP analysis probes have properly terminated state connectors;
however, many of them require termination adapters for the timing
connectors.
The optional termination adapter lets you connect the logic analyzer
probe cables directly to test ports on your target system without the
probes.
The termination adapter is designed to connect to a 20-position
(2x10), 4-wall, low-profile, header connector which is a 3M-Series 3592
or equivalent.
Termination Adapter
260