I'm trying to write a pattern of 1s and 0s 4640 digits in length to a 81134A Patter/Pulse Generator over GPIB. The spec says It can take data length up to 8192 bits in length, so I am no where near the limit. However, The machine will not register the pattern I sent it. If I send pattern up to roughly 2000 bits in length it will work, but not for length significantly greater than that. I'm watching the trace capture on NI-MA IO and it says its successful. Any help or ideas would be greatly appreciated. I've attached a few screenshots for you help.