Tektronix K1297-G20 - Manual (Page 78)

Examples
66 K1297-G20 Monitor User Manual
NOTE. The data line has not been connected properly, if the following
message appears: “The initialization of PCM Check has been terminated!
The previous configuration will be loaded.” In this case, check the
connection between the Protocol Tester and the data line measuring
sockets.
If you get the message “No signalling detected on any ports”, please
restart the autoconfiguration. Start it now via the menu
Tools:
Autoconfiguration .
Furthermore, take into account, that the autoconfiguration for LAP-based
protocols depends on the received data amount during a measurement
interval.