🚀 go-pugleaf

widow@camelot.bradley.edu (Shaun Burnett) writes:

> 	I know that the RS-232 voltage levels are +9 V for high level
> 	and -9 V for a low level.  However, how far can you deviate
> 	under +9 V and still have the signal considered a high level?
> 	Also, how high can the voltage be increased from -9 V and
> 	still have the signal considered a low level signal?
> 
> 	Thanks.
> 
> 
> Shaun Burnett		    |	"You can't survive on a new planet with a
> widow@camelot.bradley.edu   |	soul full of hope and fresh air you know."
> OS/2--Happy Happy Joy Joy--OS/2		-  Dr. Who (Tom Baker)

I USED TO SAVE THIS QUESTION FOR INTERVIEWING ENGINEERS WHO CLAIM THEY 
KNOW ALOT ABOUT RS-232.  answer the same as TTL..

NEXT QUESTION .. WHO KNOW THE REAL THRESHOLD OF TTL OUT THERE?

ANSWER .. 2 PN JUNCTION DROPS .65Vx2 = 1.3 or so.

NEXT QUESTION.. WHO KNOW S THE VOLTAGE OF A FLOATING INPUT TTL DEVICE?..

ANSWER . SAME AS LAST ANSWER...

You score hi marks if you knew all the answers. Give yourself a pat on 
the back.

If you didn't get a meter and try it. 
At least that's they worked 10 years ago.

dino@inqmind.bison.mb.ca
The Inquiring Mind BBS, Winnipeg, Manitoba  204 488-1607