How long can a GPIB cable be and still function properly?

[lgchrom]

How long can a GPIB cable be and still function properly? Are there limitations?

[Consumer Products Guy]

Good question. HP originally had three different lengths, designated A, B, and C. I think A was about 1 meter, B 2m, and C 3m. Or the other way around. I think you can just try it with 2 connected for additional length.

[H.Thomas]

20 meters, according to http://en.wikipedia.org/wiki/IEEE-488

[unmgvar]

another aspect also is the amount of connected cables together
i know that for USB, not more than 5 connections should be made in serial for proper power and com transfer

[Csaba]

Hi,
I have used 2 X 5 m cable in series without problems.
For longer distances, you can use costly fiber optical extenders.