Re: [PSES] Filter Issues [General Use]

[Price, Andrew (Leonardo, UK)]

Hi all

Thanks for the replies,

The filter is a ETS Lindgren Filter N6003 installed on the EMC Chamber wall.
The filter is defined as a 4 line 230/400V 32A  <450Hz filter.
When used for DEF STAN EMC measurements and loaded by the 4 of 10uF prior to 
the 5uH LISNs it appears to be OK,
however when only 1 phase is used it seems to cause an imbalance.

The ambient measurement shows the 400Hz and harmonics. Other than the region 
6kHz to 50kHz which exceeds the specified limit the rest of the frequency range 
is flat and meets the 6dB below the specified limit criteria.
The use of 10uF on each supply lead on the load side of the LISN's improves the 
response of the 6kHz to 50kHz region but this is still within 6dB of the 
specified limit.

Is there anything that can be done to improve the chamber filter performance?

The original 155V 400Hz generator never caused any issues, when it was replaced 
had an issue with the filter being noisy.
Chamber was replaced when EMC facility moved to a new building.
Originally 115V 400Hz to be taken from building supply but LISN's kept tripping 
supply.
Now supply obtained from a Failsafe SFC 6010 Static Convertor.
Regards
Andy



 Andrew Price
 Integrated Sensing & Protection (ISP)
 Prinicpal Environmental Engineer (EMC)

 Leonardo UK
 Sigma House,
 Christopher Martin Rd,
 Basildon
 SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
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[PSES] Filter Issues [General Use]

[Price, Andrew (Leonardo, UK)]

Hi members

Can anyone offer some advice.
Have issues with EMC Chamber RF Filter 3 phase.
Using 115V 400Hz single phase supply from a static convertor, filter looks like 
it is saturating.
Ambient levels failing between 6kHz to 150kHz.
Voltage of phase at static convertor 115.8Vrms but at EUT on bench 132Vrms

Regards
Andy


 Andrew Price
 Integrated Sensing & Protection (ISP)
 Prinicpal Environmental Engineer (EMC)

 Leonardo UK
 Sigma House,
 Christopher Martin Rd,
 Basildon
 SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
andrew.p.pr...@leonardocompany.com
 leonardocomapany.com
HELICOPTERS / AERONAUTICS / ELECTRONICS, DEFENCE AND SECURITY SYSTEMS / SPACE

P Please consider the environment before printing this email.



Leonardo UK Ltd

Registered Office: 1 Eagle Place, St James’s, London SW1Y 6AF

A company registered in England & Wales.  Company no. 02426132



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[PSES] Replacement Antenna [General Use]

[Price, Andrew (Leonardo, UK)]

Hi All

Looking to replace a 94455-1 Bicon Antenna, does anyone know of a preferred 
replacement?

Regards
Andy



 Andrew Price
 Integrated Sensing & Protection (ISP)
 Prinicpal Environmental Engineer (EMC)

 Leonardo UK
 Sigma House,
 Christopher Martin Rd,
 Basildon
 SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
andrew.p.pr...@leonardocompany.com
 leonardocomapany.com
HELICOPTERS / AERONAUTICS / ELECTRONICS, DEFENCE AND SECURITY SYSTEMS / SPACE

P Please consider the environment before printing this email.



Leonardo UK Ltd

Registered Office: 1 Eagle Place, St James’s, London SW1Y 6AF

A company registered in England & Wales.  Company no. 02426132



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Re: [PSES] 41 " Rod Antennas [General Use]

[Price, Andrew (Leonardo, UK)]

Thanks to all that replied.

The information will help decide whether to invest in a replacement active rod 
antenna or fin a better amplifier with a better noise figure.

Regards
Andy




 Andrew Price
 Land & Naval Defence Electronics Division
 Prinicpal Environmental Engineer (EMC)

 Leonardo MW Ltd
 Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
andrew.p.pr...@leonardocompany.com
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Leonardo MW Ltd
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3EL
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Re: [PSES] Calibration Load [General Use]

[Price, Andrew (Leonardo, UK)]

Thanks to those that replied.

I will try what you suggest

Regards
Andy




 Andrew Price
 Land & Naval Defence Electronics Division
 Prinicpal Environmental Engineer (EMC)

 Leonardo MW Ltd
 Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
andrew.p.pr...@leonardocompany.com
 leonardocomapany.com




Leonardo MW Ltd
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3EL
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[PSES] Calibration Load [General Use]

[Price, Andrew (Leonardo, UK)]

Hi All

Can anyone tell me the ideal value of the load resistor used for verifying the 
current in CE101 of MIL-STD-461G.

Regards
Andy




 Andrew Price
 Land & Naval Defence Electronics Division
 Prinicpal Environmental Engineer (EMC)

 Leonardo MW Ltd
 Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
andrew.p.pr...@leonardocompany.com
 leonardocomapany.com




Leonardo MW Ltd
Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 
3EL
A company registered in England & Wales.  Company no. 02426132

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[PSES] 41 " Rod Antennas [General Use]

[Price, Andrew (Leonardo, UK)]

Hi all,

Is there anyone who has done an ambient noise floor analysis of 41" rod 
antennas to determine those with the best performance.
This question comes as a result of the changes to DEF STAN 59-411 Part 3 Issue 
3 where DRE03.B is being incorporated into DRE01.B and the limit over the 
frequency range 1.6MHz to 30MHz will be 5dBuV/m. Not all active rod antennas 
will meet this limit.

Regards
Andy

P.S. Yes I also was deleted yesterday.




 Andrew Price
 Land & Naval Defence Electronics Division
 Prinicpal Environmental Engineer (EMC)

 Leonardo MW Ltd
 Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
andrew.p.pr...@leonardocompany.com
 leonardocomapany.com




Leonardo MW Ltd
Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 
3EL
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[PSES] 95055-1 Technical Data [General Use]

[Price, Andrew (Leonardo, UK)]

Hi all,

Can anyone help?
Looking for technical data on a 95055-1 magnetic Loop.

Regards
Andy




 Andrew Price
 Land & Naval Defence Electronics Division
 Prinicpal Environmental Engineer (EMC)

 Leonardo MW Ltd
 Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
andrew.p.pr...@leonardocompany.com
 leonardocomapany.com
HELICOPTERS / AERONAUTICS / ELECTRONICS, DEFENCE AND SECURITY SYSTEMS / SPACE

* Please consider the environment before printing this email.




Leonardo MW Ltd
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3EL
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[PSES] CE106 Test set-up info [General Use]

[Price, Andrew (Leonardo, UK)]

Hi all.

Can anyone help with this query?
Doing a CE106 test, have had to insert 60dB attenuation (40dB + 20dB) in the 
antenna output to help prevent the receiver input overloading.
These values incorporated into the measurement software.
Also have had to include a Hi Pass Filter 780MHz to 3000MHz to cover some of 
the transmit frequencies.
The attenuation can be compensated for in the software but without Auto Range 
On the receiver goes into over load when the transmit frequency is reached.
With Auto Range on the measurement recovers but if the external attenuation is 
reduced to attenuation remains increase for the remaining duration of the sweep.
Software used is EMC32.
Is there anything that I am missing or is there a better way to set this test 
up?

Regards
Andy


 Andrew Price
 Land & Naval Defence Electronics Division
 Prinicpal Environmental Engineer (EMC)

 Leonardo MW Ltd
 Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
andrew.p.pr...@leonardocompany.com
 leonardocomapany.com
HELICOPTERS / AERONAUTICS / ELECTRONICS, DEFENCE AND SECURITY SYSTEMS / SPACE

* Please consider the environment before printing this email.




Leonardo MW Ltd
Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 
3EL
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Re: [PSES] LED Spots in EMC Chamber [General Use]

[Price, Andrew (Leonardo, UK)]

Thanks everyone for the replies.

I will pass this information onto the person who raised this query.
>From the information I was provided the LED Spots issue a broadband noise seen 
>as rise in the ambient noise floor over the frequency range 30MHz to 180MHz, 
>there is some minor noise between 18MHz to 30MHz but the rest of the frequency 
>range between 20Hz and 18GHz is clean.
The effect on the 30MHz to 180MHz is a lift in the ambient noise floor 
approx..8-10dB around 40MHz getting less as the frequency increases. The test 
engineer stated that the measurements were still below spec limits but 
apparently during system measurements was enough to cause the unit to fail. 
(Unit passed when the LED Spots switched off.
There is no noise detectable during conducted emissions (20Hz to 150MHz).

Regards
Andy


 Andrew Price
 Land & Naval Defence Electronics Division
 Prinicpal Environmental Engineer (EMC)

 Leonardo MW Ltd
 Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
andrew.p.pr...@leonardocompany.com
 leonardocomapany.com
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[PSES] Use of LED Spots in EMC Chambers [General Use]

[Price, Andrew (Leonardo, UK)]

Hi all.

Has anyone had experience with using LED Spot lamps in EMC Chambers?
What types/manufacturers would be recommended?

Would appreciate help in trying to solve someone's problems with noise during 
radiated emissions.
Test Facility has just had all their chambers converted to LED Spots and they 
are suffering broadband noise issues.

Regards
Andy




 Andrew Price
 Land & Naval Defence Electronics Division
 Prinicpal Environmental Engineer (EMC)

 Leonardo MW Ltd
 Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
andrew.p.pr...@leonardocompany.com
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* Please consider the environment before printing this email.





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Re: [PSES] EMI Software [General Use]

[Price, Andrew (Leonardo, UK)]

Hi all,

I have used various versions of Emission Software including HP, Emtest, 
EMCHire, Labview, Emiscan, Qinetiq own software, and R EMC32.
Of these if you use R EMI receivers then the EMC32 is probably the best. If 
you have other types of receivers than you should use the best for that 
receiver.

For Immunity I use the AR Emcware V3.6, aside from this being free it is very 
easy to use and seems to provide reliable and repeatable results.

Regards
Andy



 Andrew Price
 Land & Naval Defence Electronics Division
 Prinicpal Environmental Engineer (EMC)

 Leonardo MW Ltd
 Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
andrew.p.pr...@leonardocompany.com
 leonardocomapany.com
HELICOPTERS / AERONAUTICS / ELECTRONICS, DEFENCE AND SECURITY SYSTEMS / SPACE

* Please consider the environment before printing this email.




Leonardo MW Ltd
Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 
3EL
A company registered in England & Wales.  Company no. 02426132

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Re: [PSES] Chamber grounding [General Use]

[Price, Andrew (Leonardo, UK)]

Thanks all for the replies.

It seems that there is some divided opinion.

Some of the test houses I have spoken to state that they definitely ground 
their chambers via ground spikes. This is to remove low frequency noise that 
causes issues with the low frequency emc tests  that are required in mil-std, 
def stan  and rtca/do-160.
One test house I spoke to stated that as a result of cost cutting an earth 
spike was not fitted so earthing was taken to building ground, as a result of 
this the test house has issues with low frequency noise.

The consensus of the forum is that a ground spike should not be required and 
the building ground used should be enough.

This then probably raises the question of how good is the building ground? Is 
there a requirement for this?
If there is noise on the building ground how can this be eliminated?

Regards
Andy



 Andrew Price
 Land & Naval Defence Electronics Division
 Prinicpal Environmental Engineer (EMC)

 Leonardo MW Ltd
 Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
andrew.p.pr...@leonardocompany.com
 leonardocomapany.com
HELICOPTERS / AERONAUTICS / ELECTRONICS, DEFENCE AND SECURITY SYSTEMS / SPACE

* Please consider the environment before printing this email.




Leonardo MW Ltd
Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 
3EL
A company registered in England & Wales.  Company no. 02426132

This email and any attachments are confidential to the intended
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Re: [PSES] Chamber grounding [General Use]

[Price, Andrew (Leonardo, UK)]

Hi All

Which is the best to use?
Ground each EMC chamber via an earth spike or back to the transformer of the 
supply to the building?
Which is best practice?

Regards
Andy



 Andrew Price
 Land & Naval Defence Electronics Division
 Prinicpal Environmental Engineer (EMC)

 Leonardo MW Ltd
 Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
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[PSES] Calculating Modulated Power Output. [General Use]

[Price, Andrew (Leonardo, UK)]

Hi all.

I hope one of the RF engineers can help with this.

When calculating ERP you use the Tx power either in dBW or W and the antenna 
gain in dBi.
So when you have pulse modulation,  example 9.3GHz, 38.5dBW (7676.89W) ERP at a 
duty cycle of 13%, do you calculate the modulated power level by using the ERP 
dBW or the actual ERP Watts?

Andy




 Andrew Price
 Land & Naval Defence Electronics Division
 Prinicpal Environmental Engineer (EMC)

 Leonardo MW Ltd
 Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
andrew.p.pr...@leonardocompany.com
 leonardocomapany.com
HELICOPTERS / AERONAUTICS / ELECTRONICS, DEFENCE AND SECURITY SYSTEMS / SPACE

* Please consider the environment before printing this email.




Leonardo MW Ltd
Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 
3EL
A company registered in England & Wales.  Company no. 02426132

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Re: [PSES] CE Compliance [General Use]

[Price, Andrew (Leonardo, UK)]

Thanks everyone for your help.

Regards
Andy






 Andrew Price
 Land & Naval Defence Electronics Division
 Prinicpal Environmental Engineer (EMC)

 Leonardo MW Ltd
 Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
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* Please consider the environment before printing this email.




Leonardo MW Ltd
Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 
3EL
A company registered in England & Wales.  Company no. 02426132

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[PSES] CE Compliance [General Use]

[Price, Andrew (Leonardo, UK)]

Hi all,

Can a statement that a product is compliant with the EMC Directive 2004/108/EC 
or 2014/30/EU in the support documentation be regarded as proof of conformity 
or does there have to be a Declaration of Conformity which states compliance 
with the Directive via appropriate standards???
Also to refresh my memory does the DofC have to be supplied to the end user or 
can it be held by the products distributor in the EU??

Regards
Andy




 Andrew Price
 Land & Naval Defence Electronics Division
 Prinicpal Environmental Engineer (EMC)

 Leonardo MW Ltd
 Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
andrew.p.pr...@leonardocompany.com
 leonardocomapany.com
HELICOPTERS / AERONAUTICS / ELECTRONICS, DEFENCE AND SECURITY SYSTEMS / SPACE

* Please consider the environment before printing this email.




Leonardo MW Ltd
Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 
3EL
A company registered in England & Wales.  Company no. 02426132

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Re: [PSES] RF CS High Current Test Level [General Use]

[Price, Andrew (Leonardo, UK)]

Ken

There is no requirement that is flat but there are a few that require such a 
high level 1A, 1.7A, 3.98A over the range 2MHz to 30MHz.

Regards
Andy



 Andrew Price
 Land & Naval Defence Electronics Division
 Prinicpal Environmental Engineer (EMC)

 Leonardo MW Ltd
 Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
andrew.p.pr...@leonardocompany.com
 leonardocomapany.com
HELICOPTERS / AERONAUTICS / ELECTRONICS, DEFENCE AND SECURITY SYSTEMS / SPACE

P Please consider the environment before printing this email.


From: Ken Javor [mailto:ken.ja...@emccompliance.com]
Sent: 04 May 2017 15:14
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] RF CS High Current Test Level


*** WARNING ***

This message has originated outside your organisation,
  either from an external partner or the Global Internet.
  Keep this in mind if you answer this message.
Don't know what requirement/limit you are testing to, but a limit that is flat 
below 500 kHz at a level near 2 amps is wrong.

Ken Javor
Phone: (256) 650-5261



From: Richard Jones >
Reply-To: Richard Jones >
Date: Thu, 4 May 2017 09:34:43 -0400
To: >
Subject: Re: [PSES] RF CS High Current Test Level

Thanks Ken,

That's the first piece of the puzzle covered, so still looking for 10KHz-400KHz 
and above 10MHz.
Not sure if Fischer have a full solution for this but will ring them back to 
see :-)

Does anyone know of other vendors who may be able to help?

Rich

On Wed, May 3, 2017 at 6:10 PM, Ken Javor 
> wrote:
FCC (Fischer Custom Communications) makes a very large clamp for the purpose 
you cite.

http://www.fischercc.com/products/f-040128-1008-1a/

Although they don't show a data sheet, you can derive from the max input power 
and insertion loss that it's capable of injecting 2 amps.  But only between 
roughly 400 kHz to 10 MHz.

Ken Javor
Phone: (256) 650-5261 



From: Richard Jones >
Reply-To: Richard Jones >
Date: Wed, 3 May 2017 17:33:10 -0400
To: >
Subject: [PSES] RF CS High Current Test Level


Hi Folks

Does anyone have experience generating 1.7A CW (10KHz - 400MHz) using Bulk 
Current Injection?

Wondering how people have achieved it, is there a BCI on the market able to 
sustain this level "off the shelf" or a vendor who custom builds them?

A possible alternative was to use multiple BCI's and a Power Splitter, but I 
can see this problematic at higher frequencies due to wavelength/phase etc

I realise that you would need separate BCI's, splitting the test into frequency 
bands as no one BCI could do it all

Thanks for any help provided

Rich
-


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>

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[PSES] CS High Current Test Level [General Use]

[Price, Andrew (Leonardo, UK)]

Rich

AS far as I am aware there is only one Bulk Current Injection Probe available 
for doing high level injection.
It was origonally designed by a Mr Dave Herke at Qinetiq and sold through 
Schaffner Chase, later Teseq.
The probe in question is a CIP-9136A. These are made to order.

There are hex screws in the eternal case of the probe which can be removed and 
connection to forced air cooling which will be reqired for this and higher 
level to prevent damage to the core.

I do believe it is possible to hire them as well from places such as EMC-Hire 
UK.

Hope this helps
Regards
Andy



 Andrew Price
 Land & Naval Defence Electronics Division
 Prinicpal Environmental Engineer (EMC)

 Leonardo MW Ltd
 Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
andrew.p.pr...@leonardocompany.com
 leonardocomapany.com
HELICOPTERS / AERONAUTICS / ELECTRONICS, DEFENCE AND SECURITY SYSTEMS / SPACE

* Please consider the environment before printing this email.




Leonardo MW Ltd
Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 
3EL
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[PSES] No Postings?? [General Use]

[Price, Andrew (Leonardo, UK)]

Hi there Group

For some reason it appears that I am not getting any postings from the forum?
Does anyone know why this as occurred?

Regards
Andy




 Andrew Price
 Land & Naval Defence Electronics Division
 Prinicpal Environmental Engineer (EMC)

 Leonardo MW Ltd
 Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
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Leonardo MW Ltd
Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 
3EL
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[PSES] Purchasing Australian Defence Standards [General Use]

[Price, Andrew (Leonardo, UK)]

Hi All

Anyone know how we can purchase the following Australian Defence Standards:
DEF (AUST) 5681
DEF (AUST)5168 Issue 2
AS/NZS 60529-2004

Need these urgently.
Regards
Andy




 Andrew Price
 Land & Naval Defence Electronics Division
 Prinicpal Environmental Engineer (EMC)

 Leonardo MW Ltd
 Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
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Leonardo MW Ltd
Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 
3EL
A company registered in England & Wales.  Company no. 02426132

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[PSES] Passive Loop Emissions [General Use]

[Price, Andrew (Leonardo, UK)]

Hi All

Thanks for all your help.

I had a reply from R which stated that by changing the units in the 
Transducer Correction Table to dBuA/m and then entering the Loop Antenna Values 
(dBS/m) into the table the software will automatically correct the result when 
the measurement is carried out. So far the measurements are working out 
correctly.

Regards
Andy




 Andrew Price
 Land & Naval Defence Electronics Division
 Prinicpal Environmental Engineer (EMC)

 Leonardo MW Ltd
 Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
andrew.p.pr...@leonardocompany.com
 leonardocomapany.com
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* Please consider the environment before printing this email.




Leonardo MW Ltd
Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 
3EL
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[PSES] Passive Loop Emissions [General Use]

[Price, Andrew (Leonardo, UK)]

Hi All

I need some help in obtaining the correct result.

The customer has requested an extended magnetic field emission test over the 
range 100kHz to 2MHz with a limit defined in dBpT.
The antenna to be used is an EMCO 6512 which has it correction factors provided 
in dBS/m which the emission software used does not recognise.
So is there a conversion factor that enables the right correction factor to be 
entered or is the conversion factor only used once a result is obtained??

Regards
Andy


 Andrew Price
 Land & Naval Defence Electronics Division
 Prinicpal Environmental Engineer (EMC)

 Leonardo MW Ltd
 Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
andrew.p.pr...@leonardocompany.com
 leonardocomapany.com
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* Please consider the environment before printing this email.




Leonardo MW Ltd
Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 
3EL
A company registered in England & Wales.  Company no. 02426132

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[PSES] Automated vehicles [General Use]

[Price, Andrew (Leonardo, UK)]

Hi all,

Is this a case of Total Recall Johnny Cabs
Is this going to be a case of Software commands versus human intervention and 
who or what gets the higher priority.
Also there is going to be a great deal of electronic packages, all round 
cameras, lane sensors, range lasers, Doppler and so forth. An EMC emc engineers 
dream or nightmare?

Regards
Andy


LEONARDO
 Land & Naval Defence Electronics
 Andrew Price
 Land & Naval Defence Electronics Division
 Prinicpal Environmental Engineer (EMC)
 Leonardo MW Ltd
 Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
andrew.p.pr...@leonardocompany.com
 leonardocomapany.com

HELICOPTERS / AERONAUTICS / ELECTRONICS, DEFENCE AND SECURITY SYSTEMS / SPACE

P Please consider the environment before printing this email.



Leonardo MW Ltd
Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 
3EL
A company registered in England & Wales.  Company no. 02426132

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[PSES] Uncertainty Measurement Calculations [General Use]

[Price, Andrew (Leonardo, UK)]

Hi all

Can anyone shed some light on working up the Uncertainty Measurement 
Calculations based on UKAS Lab34 for MIL-STD-461 CS115 and CS116.
I need to show the uncertainty values for these tests as follows:
Uncertainty in overall test level = 2.2dB, Uncertainty in time measurement = 
1.91%, Uncertainty in Amplitude measurement = 0.82%

MIL-STD-461 defines
4.3.1 Measurement tolerances.
Unless otherwise stated for a particular measurement, the tolerance shall be as 
follows:
a. Distance: ±5%
b. Frequency: ±2%
c. Amplitude, measurement receiver: ±2 dB
d. Amplitude, measurement system (includes measurement receivers, transducers, 
cables,
and so forth): ±3 dB
e. Time (waveforms): ±5%
f. Resistors: ±5%
g. Capacitors: ±20%

Also what equipment do I include, ie. DSO, Current Probes, Calibration Jig, 
Transient Generator, etc. and what do I exclude

I hope there are some group members that have already done this process and can 
help.

Regards
Andy


LEONARDO
 Land & Naval Division
 Andrew Price
 Land & Naval Defence Electronics Division
 Prinicpal Environmental Engineer (EMC)

 Leonardo MW Ltd
 Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
 Tel  EMC LAB : +44 (0)1268 883308
 Mobile: +44 (0)7507 854888
 
andrew.p.pr...@leonardocompany.com
 leonardocomapany.com

HELICOPTERS / AERONAUTICS / ELECTRONICS, DEFENCE AND SECURITY SYSTEMS / SPACE

P Please consider the environment before printing this email.



Leonardo MW Ltd
Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 
3EL
A company registered in England & Wales.  Company no. 02426132

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