DT, that wont work. The output has to reflect the input up to a maximum on time then the output has to be turned off regardless of input state.

Code:
Delay = 1000

Wait4Pulse: 
    IF !PORTA.0 THEN Wait4Pulse     ; Wait for incoming pulse
    PORTA.1 = 1                     ; Start Output pulse
    PAUSEUS Delay                   ;   pause for pulse width *** this will keep the output on for 1000uS, not for the duration of PORTA.0 = 1
    PORTA.1 = 0                     ; End of Output pulse

Wait4PulseEnd:                      ; Make sure input pulse is finished
    IF PORTA.0 THEN Wait4PulseEnd

GOTO Wait4Pulse