Trigger pulse width command not work

Hi Mr/Mrs,

Im user of TBS2102B oscilloscope. I able to trigger edge with fall slope using command following user manual but i unable to trigger positive pulse width following user manual example. Please assist if my command had any trouble?

TRIG:MAI:PULSE:SOURCE CH1;WIDTH:POLARITY POSITIVE;WHEN LESS 500E-6

Appreciate if u can provide a solution faster. 

Thanks and best regards
YJKoay

Hi YJKoay,

It should be trig:A:pulse... instead of trig:main:pulse