Quantum Data 802BT - Manual (Page 593)

Video Test Generator User Guide 583
XBBH
Arbitrary Bottom Border Height
Class Format parameter setting - HDMI active video
Description Establishes the first line of a horizontal letterbox bar area at the bottom of the image.
Command syntax XBBH line_number
line_number
0 to 65535 (in decimal)
Related commands XLBW , XRBW , XTBH
Example XBBH 769
FMTU