Agilent Technologies 8566B Operating And Programming Manual page 446

T H E
Threshold Enable
THE
The THE command disables or enables the threshold level. The threshold level is specified by the TH command.
OUTF'UT 718;"THE OFF;"
When queried (? or OA), TH returns the threshold line state, followed by carriage-return/line-feed (ASCII codes
13, 10). The end-or-identify state (EOI) is asserted with line feed.
Programming 337