Aha,
I see, thanks anyway.
In my case ecm is on HAT4, so it is not real easy to constantly push it fast.
(well, otoh, keyboard is ok)
one dirty little h4ck

(well, hint)
.. about "worrying" is it on or off, you can add some key-combo for jammer off separate,
(it is near the end of cockpit key list, unassigned by default)
eg. jammer toggle (on/off) = j , jammer off = CTL + j, so at the and of the jammer autorun (flash) syntax, jammer off would be always executed at the end
eg.2. (didn't program this but it should work)
SimECMOn = j
SimECMOff = {CTL SHF j}
BTN H4U /I KD(X17) DLY(100) KU(X17)
/O RPT(7) (SimECMOn DLY(323) SimECMOff DLY(153)) SimECMOff
... and here you have fast "link" to 3 ews programs
BTN H4D /I KD(X18) DLY(100) KU(X18)
/O SimEWSProgTwo SimDropFlare Rem RPT(2) (SimECMOn DLY(3412) SimECMOff DLY(853))
BTN H4L /I KD(X19) DLY(100) KU(X19)
/O SimEWSProgThree SimDropFlare Rem RPT(2) (SimECMOn DLY(3412) SimECMOff DLY(853))
BTN H4R /I KD(X20) DLY(100) KU(X20)
/O SimEWSProgOne SimDropFlare Rem RPT(2) (SimECMOn DLY(3412) SimECMOff DLY(853))
.. easy, but not tested, will do.. later

bye