HP 16550A User Reference page 226

The Mixed Display Menu
Interleaving State Listings
State listings from all other logic analyzer modules can be interleaved into the
state listing of an HP 16550A. However, the HP 16510B will not accept state
listings back from other products.
With one exception, the process to interleave a label is the same as inserting
labels. After the Interleave option is selected, an analyzer selection is made
from a list containing the analyzers configured in the Group Run. Labels for
each analyzer become available when the desired analyzer is selected.
Label Selection Menu
10–6