I was browsing the 488.2 spec for information on "Service Request Generation" and located this block diagram (Fig 11-4, Page 139) in which the block "New Reason For Service"
produces two outputs "reqt" and "reqf" (request for rsv TRUE and request for rsv FALSE)
that are fed into the block "Service Request Synchronization" to produce rsv.
The block "Service Request Synchronization" takes in one input APRS.
Is reqt not the inverse of reqf?
I understand that APRS is fed into "Service Request Synchronization" so that rsv does not change when the controller is fetching the serial poll. Does having two inputs reqt and reqf instead of one have something to do with this too?
Any help is appreciated.
Thanks
Raj
