HP 54710A User's Reference Manual page 140

Mask Formats
The mask only format loads the selected mask into the oscilloscope. Loading
both the mask and setup is a convenient method to make sure that the
scaling for the mask is correct. You would use the mask only selection in
cases when you do not want to change the present setup of the oscilloscope.
Figure 8-6 shows an example of a mask.
"DS1Eur 2048 kbit/s"
Figure 8-6
/*
Physical/Electrical Characteristics of Hierarchical
Digital Interface. (Geneva 1972 : further amended)
Recommendation G.703
*/
/*Level1 Peak 2.37V*/
/*Level2 0.00V*/
/*Delta X 244 ns */
/*Top Polygon
/* Number of vertices
_______________________________________*/
/* Bottom Polygon */2
/* Number of vertices
*/1
*/9
-0.5, Max /*Top of screen left side */
-0.5, +0.1
-0.0512, +0.5
-0.0512, +1.2
+0.5, +1.1
+1.0512, +1.2
+1.0512, +0.5
+1.5, +0.1
+1.5, Max /*Top of screen right side
*/11
-0.5, Min /* Bottom of screen left side */
-0.5, -0.1
+0.05123, -0.2
+0.05123, +0.5
+0.10246, +0.8
+0.5, +0.9
+0.8975, +0.8
+0.94877, +0.5
+0.94877, -0.2
+1.5, -0.1
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