PXI 6511 reading multiple ports in parallel

[lmd2]

I am reading multiple ports in parallel, and it seems to be working fine until I send out data on the MIL STND 1553 bus then the 6511 readings are whacky. Don't know how the 1553 affects the 6511, but am wondering if there is a better way to read the 2 ports in parallel, maybe some of the instability (?) may go away.
Grasping at straws but figure this is something I can confirm through the community.
Is there anything obviously wrong (or flakey) about how I am reading these two ports? Is there a better way?
TIA
lmd2

Message Edited by lmd2 on 03-28-2006 02:18 PM

[Laura F.]

Hello lmd2,

I am not familiar with the MIL STND 1553, but I can make a suggestion for reading from the two ports.  You can actually read from both ports in the same digital input task.  You can use a syntax like Dev1/port1/line4:5,Dev1/port2/line6 and all of your data will be acquired synchronously. 

How does data get sent out on the MIL STND 1553 bus?

Regards,

Laura

[lmd2]

Thanx
this is a very good tip, I didn't know that multiple ports could be input with a comma delimiter.
the 1553 bus seems to not be an issue (?) but the circuit had a bad IC that was engaged by the 1553 command.
Anyway I rally appreciate the tip  -   that will come in handy for sure.
lmd2