That would be my guess too although there are an awful lot of nulls. Maybe it's an intermittent cable or maybe the Fuj had a mental breakdown or maybe as Mark said it's just noise.
I assume you are not using a pre-made cable, correct? If I recall correctly, the Fuj has voltage on the handshake lines. If pins 4 and 6 are getting thru to the NI comm port that can cause problems like this since Netlinx uses those pins for RS-422/485.
I've had the pleasure to deal w/ Fujitsu's as well. I've noticed the same spooge from time to time. I think you're just seeing a hiccup in the RS-232. Not everyone makes solid RS-232 protocols...such a pity.
There are three other Fujitsus in the same system that are working, so I'm thinking it's either this TV itself, a problem with the cable, or an issue with the card on the NI4000 (not likely).
mpullin
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I assume you are not using a pre-made cable, correct? If I recall correctly, the Fuj has voltage on the handshake lines. If pins 4 and 6 are getting thru to the NI comm port that can cause problems like this since Netlinx uses those pins for RS-422/485.
I've had the pleasure to deal w/ Fujitsu's as well. I've noticed the same spooge from time to time. I think you're just seeing a hiccup in the RS-232. Not everyone makes solid RS-232 protocols...such a pity.
I'm not an electronic type person but here are some thoughts...
Dry joint somewhere between the NI and the unit (try a different cable?)
RFI (try adding those little black jobs at ?both ends?)
Nasty power supply (try adding a UPS?)
Bad UART in the NI (try a different NI or a different port?)
Bad UART in the unit (try a different Plasma?)