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- Newsgroups: sci.electronics
- Path: sparky!uunet!cs.utexas.edu!sdd.hp.com!usc!aero.org!helfman
- From: helfman@aero.org (Robert S. Helfman)
- Subject: Re: EIA-232 cable length restrictions
- Message-ID: <1992Aug18.071452.7706@aero.org>
- Sender: news@aero.org
- Organization: The Aerospace Corporation, El Segundo, CA
- References: <1992Aug17.192021.4354@miles.com>
- Date: Tue, 18 Aug 1992 07:14:52 GMT
- Lines: 18
-
- In article <1992Aug17.192021.4354@miles.com> jep@miles.com (Joseph Perry) writes:
- >I'm trying to determine the maximum cable length for EIA-232 connections.
- >EIA-232 specifies that the effective shunt capacitance of the receiver
- >side of the interchange circuit be no more that 2500 picofarads.
- >
- .....Stuff deleted......
-
- >Have I missed something in my measurements and analysis or is the EIA-232
- >standard overly conservative in limiting cable length?
-
- It is VERY conservative. We run terminals at 9.6k and printers at
- 19.2 using twisted pair, unshielded, running in bundles with dozens of
- other similar circuits, all over the building. Runs of three hundred feet
- are typical. No hay problema (there's no problem).
-
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