Is it possible to see a pattern on a single DS0 with the YBT1?

Is it possible to see a pattern on a single DS0 with the YBT1?

No. The YBT1 expects to see a T-1 line with sync and multiple DS0s. The Drop DS0 screen will show all 24 DS0s and will associate a color with each based upon its ones density, from black for all zeros to red for all ones. However, it shows these colors based on a percentage and not on a pattern.