My instruments are lying to me!!!
Or I have used different settings to look at different SSC signals.
And like the proverbial bumblebee that was not told he cannot fly because
theory says so, these stupid instruments did not read the textbooks.
I gotta get a cheaper instrument to see reality.
On 2/10/2012, Mark Gandler wrote:
My question
for TIA-968-A is: how can something be compliant with all the criteria in
this standard "in spite of" been totally destructed? Does it
mean it is ok if power adapter or power supply is dead or entire product,
including voice port can be out?
Test L
> From: Macy [mailto:m...@basicisp.net]
> Sent: Friday, February 10, 2012 07:32
>
> Next you'll tell us the component was radioactive, made
> of some 'surplus' material. Like all that gold jewelry
> that found itself on the market way back when.
or the cheese graters from not so very long ago.
T
I have not seen many failure with 2.5KV surge on a power supply for FCC Part 68
tests.
The duration is very small for 2.5KV. I can understand 800V Metallic surge
failures.
I did test many T1, DSL and external modem testing back in the FCC Part 68
/Bill von Alven days working for a Test la
Mark and Cortland are both correct. For type A surges, the surges may damage
the unit under test, but the unit cannot cause
harm to the network after the surge, irregardless of of its operating
condition. The most common “Harm” would be for the
unit to go “off hook” in a permanent condition.
Hi Mark,
I'll reference TIA-968-B since it is the latest version of the standard. Under
section 4.1 Environmental Simulation it states:
Unpackaged approved terminal equipment and approved protective circuitry shall
comply
with all the criteria specified in this Standard, both prior to and afte
Dan,
"Your equipment may fail or be completely destroyed but it cannot take the
network with it"
this was my understanding as well (regardless of how poorly and senseless the
standard written), but clearly it is not the sam understanding across the labs.
Are where any guidance, f.a.q's or int
Hi Neven,
I can also confirm that you should see a decrease in amplitude in peak mode for
SS clocking. I use my simple handheld Thurlby Thander PSA2701T peak-reading
spectrum analyzer to demo this during my EMC seminars.
___
Kenneth Wyatt
Wyatt Technical Services LLC
Woodland
I would like to thank sincerely to all who responded, I appreciate it. I am not
going to react to any discussions on whether it is cheating or not :), it was
not anywhere in my mind when I posted the question and I hope this topic does
not degrade :).
But, I'd like to summarize a little:
"The operation was a success but the patient died?"
Seriously... Some stnadards as you say allow functional fauilure if
worse thigns don't happen. I particularly liked the GR-1089 toxic
smoke test; next best thing to burning a MANAGER at the stake! Ahem.
Does the test you did require the
Mark,
Your equipment may fail or be completely destroyed but it cannot take the
network with it. After the failure mode the applicable tests are repeated to
make sure you product does not harm the network even if your product no longer
operates.
Dan
From: Mark Gandler [mailto:markgand...@hot
Group,
trying to get to the bottom of the statement some of you saw many times over.
Test is a power line surge, section 4.2.4 of TIA-968-A. This is a quote:
"Failure Modes resulting from application of power line surge. Approved terminal
equipment and approved protective circuitry shall compl
In message <20120210073151.54d66...@m0005312.ppops.net>, dated Fri, 10
Feb 2012, Macy writes:
Next you'll tell us the component was radioactive, made of some
'surplus' material. Like all that gold jewelry that found itself on the
market way back when.
Polonium melts at 254 C.
--
OOO - Own O
Doug,
Next you'll tell us the component was radioactive, made of some 'surplus'
material. Like all that gold jewelry that found itself on the market way back
when.
--- d...@emcesd.com wrote:
From: Doug Smith
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Melting BNC connectors
Date:
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