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[Discuss] Wire tester (like a tone tester)
- Subject: [Discuss] Wire tester (like a tone tester)
- From: bill.n1vux at gmail.com (Bill Ricker)
- Date: Fri, 3 Oct 2014 12:11:19 -0400
- In-reply-to: <20141003142809.GG16762@angus.ind.WPI.EDU>
- References: <CAKtLMgqMDcf1gFTSiMvP7OLU5+A=Ck-wUm+fM0T7chfJnEHJcQ@mail.gmail.com> <CAAbKA3WgnA+n0YVfxKsen2st_ZWX1c_8uS4LVhmb4=j1xgJd9A@mail.gmail.com> <20141003142809.GG16762@angus.ind.WPI.EDU>
On Fri, Oct 3, 2014 at 10:28 AM, Chuck Anderson <cra at wpi.edu> wrote: >> A DC voltmeter with RJ-45 modular plug on a pigtail should let you >> check for PoE ? > > No, power won't be applied unless the PSE (power-sourcing equipment) > detects a PD (powered device) at the far end. A simple resistor > should allow that to happen though. So an RJ-45 pigtail for PoE testing with a VOM needs a 25 k? bleeder in shunt (or in series on mA scale). Good to know. Thanks. (Alternatively, the periodic PSE DC pulse checking for new PD current draw would be seen on an O-scope when setting up for TDR, or otherwise detected with DSP sampling.) -- Bill Ricker bill.n1vux at gmail.com https://www.linkedin.com/in/n1vux
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- [Discuss] Wire tester (like a tone tester)
- From: scott at ehrlichtronics.com (Scott Ehrlich)
- [Discuss] Wire tester (like a tone tester)
- From: bill.n1vux at gmail.com (Bill Ricker)
- [Discuss] Wire tester (like a tone tester)
- From: cra at WPI.EDU (Chuck Anderson)
- [Discuss] Wire tester (like a tone tester)
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