John Harrington wrote:
I'm having some fun with an NSA measurement. I get a swing of 8dB
between
30MHz and 45MHz horizontally polarized. At 30 MHz I get too little
attenuation (i.e. I receive too much of the transmitted signal) and at
45MHz
too much attenuation. The rest of the frequency
Agree with you Sam.
I can not see that you have to install IEC60945 approved equipment into a
bass boat. And far as I understand, IEC60945 only applies for equipment
placed in IMO ships.
Bass boats are not IMO ships ..
But it could happened that your client who manufactures fish locating
Ferrites on both tx and rx cables. Also, don't forget the pads at the
antennas as they reduce sw. I had to use both the ferrites and 6 dB pads to
eliminate swings, which were obviously not due to site geometry but cabling
issues. The back edge of the OATS on the transmit side can also affect your
Have you tried ferrites on the tx coax? Also move the tx coax around, I'll bet
it will be worked out with coax placement?
Michael Sundstrom
NOKIA
TCC Dallas / EMC
of: (972) 374-1462
cell: (817) 917-5021
amateur call: KB5UKT
From: ext John Harrington
Amund,
Thanks for the information. I can understand and appreciate the
importance of that on ocean going vessels. However, I don't mean to be
cynical, but is a bass boat considered to have what equates to a bridge
on a cruise ship or ocean liner?
After all, this is a bass boat used on a
Hi Ken,
You could try www.belden.com, a few clicks and I found a few that may fit
your specifications. I'd send web addresses to the product specs that I
found, but the way their website functions doesn't provide a link for each
page that you look at so it just won't work...
Good luck,
Hi Sam,
Quote IEC60945:
This standard specifies minimum performance requirements, methods of
testing and required
test results for general requirements which can be applied to those
characteristics common to
all equipment described hereunder:
a) shipborne radio equipment .
b)
Hello All
I'm having some fun with an NSA measurement. I get a swing of 8dB between
30MHz and 45MHz horizontally polarized. At 30 MHz I get too little
attenuation (i.e. I receive too much of the transmitted signal) and at 45MHz
too much attenuation. The rest of the frequency range is good
Almost perfect - just one conductor short :-(
From: neve...@comcast.net
Reply-To: neve...@comcast.net
Date: Thu, 18 Sep 2003 18:14:57 +
To: emc-p...@majordomo.ieee.org
Subject: RE: need shielded cable
For example:
http://www.ethernetrail.com/Datasheets/Flex_cable.pdf
Neven
Hello Group,
Been a while……
Hope all has been well with everyone.
I have a client who manufactures fish locating equipment designed to be used
on recreational vessels such as your standard bass boat. My client has been
getting his equipment tested to EN 60945 because it used in the
Hi Neven,
Yes - A shielded telcomm cable is the way to go I agree.
From: owner-emc-p...@majordomo.ieee.org
[mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of
neve...@comcast.net
Sent: Thursday, September 18, 2003 9:58 AM
To: emc-p...@majordomo.ieee.org
Subject: Re: need shielded cable
For example:
http://www.ethernetrail.com/Datasheets/Flex_cable.pdf
Neven
Hi Neven,
Yes - A shielded telcomm cable is the way to go I agree.
-Original Message-
From: owner-emc-p...@majordomo.ieee.org
[mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of
neve...@comcast.net
I read in !emc-pstc that Ken Javor ken.ja...@emccompliance.com wrote
(in bb8f3e46.4ed4%ken.ja...@emccompliance.com) about 'need shielded
cable' on Thu, 18 Sep 2003:
It is available as a custom product at a cost of about $3 K for a spool.
But I need just a little to see how well it works, and
Would a cable with four twisted pairs + shield work? If yes, you may consider
CAT5 (5 twisted per inch) or CAT3 (3 twists per inch) shielded Ethernet cable.
They come in AVG 24 and 26 sizes, stranded and colid, with foil and/or braided
shield. I am not sure what manufacturer carries what
Having referred to the standard,
The keyway(s) have nothing to do with current rating. They relate to the
temperature rating of the connector.
10A connectors are rectangular with two bevelled corners only for standard
conditions. They have a single keyway on the longer side for 'hot'
conditions,
Greetings all,
I have very little experience with Dept. of Transportation and DOT shipping
requirements. In this case, I have a pallet with very a tall, top-heavy load.
Excluding considerations for dock and truck door heights, are there testing
requirements for determining if a load is too
Thanks, John. Yes, I know that, but it wasn't completely clear whether this
was professional equipment or otherwise. Also, it may not be a requirement
but it is still good practice if it makes sense to do so.
Best regards,
Neil
-Original Message-
From: John Woodgate
It is available as a custom product at a cost of about $3 K for a spool.
But I need just a little to see how well it works, and they won't do a
sample. I was specifically looking for something off-the-shelf. For
evaluation purposes the number of conductors doesn't matter as long as it is
I read in !emc-pstc that Barker, Neil neil.bar...@e2vtechnologies.com
wrote (in 4f826f960057d4118ec3009027e2453808a52...@whl17.e2v.uk) about
'IEC 60320 connector and cable' on Thu, 18 Sep 2003:
Incidentally, unless there is a good reason by virtue of the
installation instructions for supplying
I read in !emc-pstc that Peter L. Tarver peter.tar...@sanmina-sci.com
wrote (in nebbkemlgllmjofmopleeeffelaa.peter.tar...@sanmina-sci.com)
about 'fan question' on Thu, 18 Sep 2003:
OTOH, if a double fault scenario seems plausible, you may wish to
perform the testing for your own edification,
I read in !emc-pstc that Neil Helsby nei...@solid-state-logic.com
wrote (in 20030918.10200...@mis.configured.host) about 'IEC 60320
connector and cable' on Thu, 18 Sep 2003:
The cable colour codes are obviously different but it seems that the
connector is also physically different
What is the
Back at a former employer, we were fond of saying that there was a difference
between Safe and Compliant. These scenarios are perfect illustrations.
If there is a dormant fault in your equipment which could mask a safety
hazard, that is Compliant but not Safe. I personally would try and reduce
I read in !emc-pstc that Brian O'Connell boconn...@t-yuden.com wrote
(in f7e9180f6f7f5840858d3db815e4f7ad1f2...@cms21.t-yuden.com) about
'fan question' on Thu, 18 Sep 2003:
And, extrapolating from Mr Woodgate's comments on this thread, am I
gold-plating safety tests?
Well, yes, in
Amen.
The test house might attempt to invoke the forward to a
standard, if it contains text that provides them an out,
where there is clear engineering rationale and a very
specific risk of a hazard being evaluated not anticipated by
the standard. Even so, the sand beneath their feet would be
Good People
A related question: Are vents on different sides of the test unit each blocked
individually, or is the blocking of ALL vents considered the Single Fault
Condition?
And, extrapolating from Mr Woodgate's comments on this thread, am I
gold-plating safety tests?
luck,
Brian
Hi Folks
From memory, you can find a dual (HAR/NRTL)certified 60320 male-to-female
extension cord set (as used within cabinets for power distribution) using a
dual-certified cord because these use a HAR cord and are classified by NTRLs
as a special construction for the particular purpose, but
In a message dated 9/18/2003, Dan Roman writes:
Assuming your talking about 60950 and the signal lines are SELV you only need
basic insulation, not reinforced, between TNV-3 and SELV. Distance through
insulation does not come into play, just the dielectric test and voltage
rating of the wire
Alex,
Assuming your talking about 60950 and the signal lines are SELV you only need
basic insulation, not reinforced, between TNV-3 and SELV. Distance through
insulation does not come into play, just the dielectric test and voltage
rating of the wire in this case.
Dan Roman
dan.ro...@ieee.org
Neil,
I think that you have already answered your own question.
The reason that a moulded power lead (cord) assembly is not dual certified
is because of the different cable specifications (not necessarily just the
insulation colours, but may include flammability ratings, and voltage
ratings),
We supply a mains power lead (cord) with moulded IEC 60320 connector and
stripped ends. When we know the destination of the product, we enclose
the correct one for Europe or USA otherwise two cables are packed.
The cable colour codes are obviously different but it seems that the
connector is
I read in !emc-pstc that Gibling, Vic vic.gibl...@e2vtechnologies.com
wrote (in 4f826f960057d4118ec3009027e245380946d...@whl17.e2v.uk) about
'fan question' on Thu, 18 Sep 2003:
A view of an international test house considers two simultaneous faults
if one is 'invisible' to an operator. The
Hi Folks
In the days when I was testing professional disk/tape systems regularly for
HP, I often gave them a very hard time by blocking the fan(s), sealing the
enclosure slots with masking tape and then running the worst case duty cycle
in a test corner until temperatures stabilised.
Dependent
Hi Alex,
In my view the dielectric strength test and insulation thickness are not
alternative solutions but must be met concurrently. I don't think that you
would get an accredited test house to concur with your solution, but it may be
worth asking the question. I have found that most test
I read in !emc-pstc that Ken Javor ken.ja...@emccompliance.com wrote
(in bb8e63cb.4e7f%ken.ja...@emccompliance.com) about 'need shielded
cable' on Wed, 17 Sep 2003:
I am looking for a five conductor overall shielded cable. The wires
need to be stranded and very small gauge, AWG 26 or smaller.
Hi Colleagues,
Does anyone foresee a problem if I route the PSTN and Signal wires within the
same cable?
I am thinking of a particular application where the above scenario would fit
well in my design. I ensure that the 1.6mm (and 2.0mm for re-inforced
insulation) spacing requirement is met on
Ken, The foils you describe probably isn't going to work under rugged
conditions. The foil will split and crack axailly after with a few flexing
of the cable. Foil shielded and coiled keyboard cables are a good example. The
coil was there to take up the slack but still allow the user to
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