Which Time Slot?

[N7AS]

In the Frequency Database.
Arizona > Yavapai County > Northern Arizona Veterans Administration Health Care System

There are 2 talk groups using CC1. The time slot just shows SL *.
What does the asterisk mean?
I want just to monitor using my Motorola XPR3500e when I am in the area.

 

[GTR8000]

The asterisk means that either a) no one submitted the slot, or b) the TG has been observed on both slots.