RE: ITE / AV Equipment with Ethernet

Dan, Emissions Ethernet test repeatability is improved by a loopback program that broadcasts continual data. Be sure the loopback perimeter includes the cable (beyond the driver chip). Terminate the Ethernet TP cable into a Class B hub; it is easier to explain than a 100-ohm dummy load. Althou

RE: CE for IP Phone

Alan, If the device looks like a telephone and can easily be connected to the POTS (e.g. RJ-11 or RJ-45), you can assume someone will try to connect it to the telephone network. So due diligence means R&TTE testing and marking, if only to warn via the 'alert' symbol that the device does not comply

RE: Question regarding something slightly unusual ...

Doug - Dual listing is simple economics assuming you meant '115 V' by your '155 V': Multiple approvals let you sell slow-moving US inventory overseas simply by switching the linecord (if you supply multilingual I-I's). In the same manner, slow-moving international inventory can be sold here. W

RE: FCC information

Since CISPR 22 as an alternate procedure acceptable to both versions, we test to CISPR, covering international requirements with the same set-up (testing at both 115 and 230V or at the worst-case voltage). CISPR 22's mains-conducted-RF limits have been stable for years. David -Original Mess

IEC 60068-2-18 fixturing

Does anyone know of a source of fixturing for: Ra 2 cabinet integrity test (Drip box) referenced in IEC 60529 and IEC 60068-2-18. David Sterner ADEMCO Group Div. of Honeywell International 165 Eileen Way Syosset NY 11791 516-921-6704 x6970

RE: USB Immunity Specs??

Brian - USB on a PC is designed for residential environment; stress levels should be 3V/m for EN61000-4-3 and 3V for EN61000-4-6. We got similar results checking USB to EN50130-4 alarm system requirements (which resemble industrial environment. EFT needs fault-tolerant software (acceptable pe

RE: suggestion for >100W audio amp

http://www.crownaudio.com has audio amplifiers exceeding 100W. Ion-implanter manufacturers have been known to use Crown amplifiers as servo amps for ion deflection coils and plates. Professional musicians attest to their stability. David -Original Message- From: shbe...@rockwellcollins.

RE: Open chassis computers for sale - with neon lights?

Plexiglas cases are great for air-flow studies and trade show demos. It would be presumptive indeed to affix an FCC DofC logo to a chassis w/o motherboard. I suspect many other pstc members have located television sets near a PC operating with cover removed and experienced only minor interferenc

RE: IEEE Conference Proceedings (2000 - 2001)

The 2001 Montreal Symposium is IEEE Cat. # 01CH37161C and ISBN: 0-7803-6571-2 David Sterner ADEMCO -Original Message- From: Aschenberg, Mat [mailto:matt.aschenb...@echostar.com] Sent: Monday, July 15, 2002 11:18 AM To: emc-p...@ieee.org Subject: IEEE Conference Proceedings (2000 - 2001)

RE: Side Issue: Proximity Cards in Wallets ...

I've been swiping my wallet past HID card readers for a couple years and the credit cards still work ok. If you open the card reader test reports on FCC's website you will see why: low frequency (126-128 Hz), low power (< 10dBuA/m @ 10m). David -Original Message- From: Doug McKean [mail

RE: IEC 60950 & Solar Cells

Don Theoretical solar-cell efficiency calculation excludes photons of insufficient energy for electron-hole-pair production. Also photon energy beyond pair-production requiement is converted to heat (and cannot produce electricity). Electron-hole pairs produced in doped regions above or below th

RE: Compact Chamber Calibration

Don, I believe the rationale is: 1) if the chamber has a natural cancellation frequency affecting a single location you do not have to boost levels in the remaining locations out of proportion. 2) it is a qualitative test; unless the EUT is highly tuned to a frequency, the adjacent frequencies w

RE: Stun Guns on Aircraft.

Relax. The worst would be a modern Windows-based system that must be rebooted after the 'blue-screens' and 'general protection faults'. David -Original Message- From: Fred Townsend [mailto:f...@poasana.com] Sent: Friday, May 03, 2002 2:24 PM To: Gregg Kervill Cc: emc-p...@majordomo.ieee

RE: Inquiry on standard specifying potential ESD hazard reduced t o a level BELOW 200V

Paul, ANSI/EIA-625-1994 Requirements for Handling Electrostatic-Discharge-Sensitive (ESDS) Devices specifies that antistatic packaging shall not triboelectric charge to greater than +/-200V; and workstation equipment 'shall not generate +/-200V within twelve (12) inches of unprotected ESDS devices

RE: Suitable CDN for IEC61000-4-6 ethernet 10/100

LINK LOSS Complete link loss is likely from the collision-detect circuitry (EUT or AE); it interprets the induced RF + signal as a collision. Hubs typically 'partition' ports having high collision rates (remaining ports function normally if the noisy node is disconnected). Some hubs 'unpartitio

RE: Suitable CDN for IEC61000-4-6 ethernet 10/100

Most people use the EM clamp. We test to EN50130-4 alarm system limits: 10V, pulsed and AM modulated. The test is trivial because of the inherent immunity of Ethernet; be sure you understand the EUT and AE port partitioning algorithms. Constructing a CDN that compliant to ANSI/IEEE 802.3/802.3

RE: EMC test set-up for device with ethernet connection

Ari, Circuit diagram is EN61000-4-5: Figure 10. My coil was 20mH coil: www.wilcocorp.com P/N HFT-203 which has a DC resistance, R(L), of 2 ohms. The key is minimizing R(L). Ethernet incorporates internal threshold-detection and noise-rejection; low level signals are rejected both devices on th

RE: EMC test set-up for device with ethernet connection

Mike, A method that surges two units simultaneously (as with coaxial cable) is good. Justification: IEEE 802.3 compliance A link with a 20mH decoupler is atypical and non-compliant with ANSI/IEEE 802.3 (a.k.a. ISO/IEC 8802-3) Ethernet requirements. Inductance (noted by Richard Woods) is a pr

RE: EMC test set-up for device with ethernet connection

Richard, We made our own decoupler with low-resistance 20mH coils. You really should have an active link during conditioning. Off-line surge will not detect a partitioned port; if there is no link, there can be no partition. A slow link is better than no link. David -Original Message---

RE: EMC test set-up for device with ethernet connection

Here is one approach: Terminations: You need actual or simulated traffic (data packets) on the LAN. Terminate cables per IEEE802.x; the LAN link is a transmission line and must be correctly terminated (by LAN card or hub). Details depend on EUT functionality. Wiring configuration for emission

RE: Temporarily disabling a fire fighting system

John Woodgate wrote: "But what advice to you give about the circumstances under which the system may be switched off? The building must surely be substantially unoccupied, so that lives are not at risk. But there may be other requirements as well; the insurers wouldn't like the building to burn d

RE: Temporarily disabling a fire fighting system

Arno, Our Installation Instructions for Fire/Burglary Alarm Control Panels specify permanent wiring to the mains for security reasons. However, a double-pole circuit breaker on the branch circuit supplying the control panel is recommended to satisfy the LVD. In the US-Canada we have optional ra

RE: anybody have a better link than this to the fcc rules - only shows the odd sections of part 15

Maybe it's for future harmonization with IEC-CEI specs: they can put French on even-numbered pages. Dave -Original Message- From: John Woodgate [mailto:j...@jmwa.demon.co.uk] Sent: Monday, March 18, 2002 5:38 PM To: emc-p...@majordomo.ieee.org Subject: Re: anybody have a better link than

RE: CE Mark on Product Packaging

Russell, The R&TTE CE-marking includes a character (!) if geographical or TELCO-interface restrictions. LVD/EMC CE-marking is simply 'CE', no extra information. The compulsory R&TTE marking is good; no one wants customers to break seals on retail packages to find whether R&TTE products have res

RE: R&TTE DoC Philosophy Question

Kevin, Council Directive 99/5/EC does call out directives 73/23/EEC and 89/336/EEC. Since some customers are not aware of the linkage, listing all three directives on the DofC avoids having to 'educate the customer'. Either way, standards applied will tell the story. David -Original Messag

RE: Pencil erasers for pre-EMI cleaning? (cleaning mating surface s, chassis, )

I imported it from their website into MS Word. It prints on legal (8-1/2 x 17) paper. Click on any product, then click the topics in the pull-down menu. Select 'metal compatibility' David -Original Message- From: Chris Maxwell [mailto:chris.maxw...@nettest.com] Sent: Monday, March 04,

RE: Using PCB traces as transient voltage suppressor

Breakdown voltage is geometry- and passivation-dependent. Sharp points concentrate the field for lower breakdown voltage. My TCS087 test devices with separation of 1.6 mils (4.06 x 10^^-5 m) had breakdowns of 250V (6.1 MV/m) with sawtooth structures and 300V for parallel structures. 45° (cross

RE: Japan mains voltage

Much of Japan is 100V 50Hz (worst case for transformers). Japan approval should cover 50/60Hz. Hotels generate a 120V 60Hz for US appliances. The 200V supply is more complicated. I had a JEOL electron microscope that wanted 3-phase 200 volts. They would not let us run it on 208V 3-phase and w

RE: CE - abbreviation

Amund, I don't think the discussion reached a consensus. An early book on the subject, Chris Marshman. "The Guide to the EMC Directive." 1992:IEEE Press, Piscataway NJ 308p., identified 'Communauté Européen' as the reason for 'CE' (p11 of Introduction). Some explainations are anachronistic.

RE: Alpha particles

Jim, Alpha particle effects on DRAMS is fairly well documented because charge is temporarily stored in the cells. Most DRAMs today use refresh cycles with Hamming codes and enough extra cells for SECSED error detection and correction. See Proc. IRPS-1988 (2 papers including information on com

RE: ENV 50141 and EN 61000-4-6

A proposed amendment to EN50130-4 invokes EN61000-4-6 and clarifies other problems. Unfortunately it also calls out RF radiated immunity to 2GHz. Meanwhile, with EN50131-4's exceptions to ENV 50141, the switch to EN61000-4-5 is a moot point. David -Original Message- From: John Juhasz [

RE: EMC-related safety issues

My copy of BS EN 50140-4:1996 was 'published under the authority of the Standards Board and comes into effect on 15 August 1996.' BS DOW was 2001-01-01 for the 1998 version. Amendment 10102 dated September 1998 affects page 3, adding 'alarm transmission systems' to the scope. Comments: 1) Sup

RE: RJ45 filtered connector

Some Ethernet history will explain the situation: 10BaseT Ethernet was designed to run on the same cable with telephone to simplify connectivity to cubicles. Non-telco pins were selected for Ethernet so RJ-45 jacks could accept either a telephone- or Ethernet plug. This combination wiring scheme

RE: RJ45 filtered connector

John, The pertinent specification, ANSI/IEEE 802.3 (a.k.a. ISO/IEC8802.3), describes the Ethernet physical layer plug/jack as an "RJ-45". ArcNet twisted pair was "RJ-11". If you purchase jacks that include internal filters, be sure the filters are designed for Ethernet/F-E (10BaseT & 100BaseTX

RE: Are there any standards written for FTIR analytical methods.

Check Nicolet's website [ http://www.nicolet.com ] application notes. For effuent monitoring with FTIR you need to determine the spectral line(s) of interest and set up instrument parameters to capture and record changes. Knowledge of the process in question as well as t

RE: German Translation

'Gefährdungen' is the plural 'die Gefährdung' meaning endangering or imperiling I'm not sure there is a good English equivalent, 'endangerings' is the litteral translation. David -Original Message- From: Stephen Phillips [mailto:step...@cisco.com] Sent: Friday, November 30, 2001 8:57 A

RE: Notified Body Question

1) You can check the list of notified bodies to verify the NB listing. 2) The lab was probably accredited to EN45001 when it was valid. Accrediting bodies are transferring accreditations from 45001 and ISO Guide 25 to IEC/ISO/EN17025 but an 'upgrade' is not automatic, nor did it begin with the de

RE: ULC vs. CUL

Gregg, ULC is UL Canada whose logo is "ULC" inside a maple leaf inside a circle. ULC is now owned by UL (purchased a couple years ago) but files and administrative functions are not yet merged ULC is different from cUL and CSA (different spec #'s, files, etc.) ULC approvals are primar

RE: IEEE isolation question.

Jake Obviously you refer to 10/100 twisted-pair Ethernet with isolation transformers. ANSI/IEEE802.3 (ISO/IEC8802-3) requirements are for safety and EMC protection: Cat-5 cabling is self-shielding, impedance-matched transformer terminations provide ideal transmission lines. Each link is transfor

RE: Label - telecom port

Amund, UL once accepted a "phone-ban" symbol (circle and diagonal line through a desk-type telephone). They did not like the "hockey-stick-ban" label. I think the phone-ban symbol originated at NCR. David -Original Message- From: am...@westin-emission.no [mailto:am...@westin-emission.

RE: Light Emission from Professional Photography Flashes

Rich, Peter, Strobe flash is not a simple calculation. The iris of the eyes and 'visual purple' both alter the sensitivity. So human susceptibility depends on darkness of the environment. Strobe flash units are rated in 'Watt-seconds' but many flash units have a thyrister circuit that cuts off

RE: 10/100 base interface in a plastic box

Jon, Richard, Test radiated emissions at both speeds and with each cable type. Per ANSI/IEEE 802.3 and 802.3h, 100BaseTX has 1/2 the pulse height of 10BaseT (to reduce EMI). Whether to earth the shield (or semi-shield) is an eternal question. These four possibilities can occur (since a hub upl

RE: ESD Immunity Testing

Rich, Multiple zaps and step-stress techniques are ideal for evaluation and characterization of new circuitry during the engineering phase of development. The proof of good engineering design is an ESD test at the system level to the applicable ESD standard(s). The typical ten zaps may not cove

RE: WTC - voice alarm system?

Paul, American Society for Quality ( website, http:/www.asq.org ) is asking for professionals to volunteer for a panel to do this type of analysis. Probabilistic evaluations (Reliability, Quality, Fault Tree) are more ASQ than EMC. We all want to do something constructive and are frustrated by

RE: WTC - voice alarm system?

Visit ASQ's website, http:/www.asq.org. They are setting up a program and are requesting input from professionals. Here is a way we can make a difference and be part of the solution. David -Original Message- From: owner-emc-p...@majordomo.ieee.org@PITTWAYNOTES On Behalf Of

RE: WTC - voice alarm system?

This is not a secure forum. I strongly urge people not to post security information for buildings here. All of us in the NYC area still grieve for our loved ones, or have close friends who are grieving. David Sterner ADEMCO Syosset, NY -Original Message- From: owner-emc-p...@m

RE: FCC Standards

FCC CFR-47 Parts 15 and 68 are posted on FCC's website http://www.fcc.gov Part 68 (telephone terminal) administration was officially outsourced to ACTA (Administrative Council for Termianl Attachments) July 23, 2001. ACTA's website http://www.part68.org has draft versions of the revised Part 68

RE: Oils for the 950 Hot Flaming Oil Test

These are available on Exxon-Mobil's website, http:\\www.exxon.com . Kerosene is listed under: http://www.exxon.com/exxon_productdata/msds/index.html Exxon's descriptor is: "EXXON LOW S DIESEL 1". F.Y.I. Holes with dimensions requiring UL/EN60950 hot oil testing usually fail. Openings which

RE: Hot Swappable Power Supplies ?

Here are several 60950 issues: 1) Are exposed hot terminals accessable when P/S is removed? Depending on whether the power supplies are 'shared' or switchover' and types of diode protection, there may be hazardous voltages or currents on the connectors (check the amperage and joule availablity).

RE: Conducted EMI on telecommunication ports

Don, Since you did not identify your LAN protocol (Ethernet, Fast Ethernet, Token Ring, ArcNet, etc.) I will give you a general answer. I know of three approaches to generate traffic: 1) Diagnostics programs from NIC vendors e.g. http://www.smc.com/smc/pages_html/homef.html You can send specifi

RE: Ethernet baluns

Paolo, You need a mini hub with 10Base2 and 10BaseT connections. A balun will not work because 10BastT is a 4-wire connection (T1, T2 R1, R2) whereas 10Base2 is a 2-wire connection. Also 10b2 supports daisy chain but 10bT is point-to-point. What kinds of EMC problems are you having with 10b2?

RE: Remote Hazrdous Secondary Voltage Power Feeding on Lan Cablin g

Peter, The only widely used, potentially unsafe cabling for 802.x is shielded twisted pair (STP) --- sorry, Europeans. Since STP shield termination is undefined in 802.x; there is no prohibition against connecting two pieces of Class 2 equipment, potentially connecting dissimilar earth potenti

RE: commercial surveillance video cameras

EUROPE The directives are the easy part: 73/23/EEC for safety; 89/336/EEC for EMC; and if it has a transmitter, 99/5/EC Choosing the EuroNorms is more complicated. We expect camera vendors to comply with: EN 55022:1998 for RF emissions EN 50130-4:1995/1998 Alarm systems immunity

RE: Translation Requirements

Safety related instructions for the user should be in the vernacular under 73/23/EEC. There is more latitude on language for safety-related instructions for an 'installer'. However if installer's instructions have life-threatening consequences you reduce legal exposure by using a widely-understo

RE: switching NRTLs

Assuming original approval is to UL1950 you might try adding an NRTL, then after a period of time drop the original NRTL. This way you take advantage of any agreements between the NRTLs. Typical costs for adding another NRTL using shared data are 60% of the cost of the original investigation. Yo

RE: EN55022 vs. FCC Part 15

Chris, My point was EUT-related, not spec-related. You must perform FCC conducted RF emissions testing with the correct US mains interface, or be prepared to justify that the 230V test results are sufficiently equivalent (e.g. based on past history). Your point on limits is valid, but moot if y

RE: A1 of EN61000-4-3

I recommend getting the version that incorporates A1. The IEC version of A1 conflicts with the remaining text on field uniformity calculations if you simply replace the indicated paragraphs. david -Original Message- From: wo...@sensormatic.com [mailto:wo...@sensormatic.com] Sent: Friday,

RE: Compliance Global list information

That should be "www.cbscheme.org" -Original Message- From: geor...@lexmark.com [mailto:geor...@lexmark.com] Sent: Tuesday, October 10, 2000 7:49 AM To: r...@terawave.com Cc: emc-p...@ieee.org Subject: Re: Compliance Global list information Go to www.cbscheme.com and click on "Countries

RE: Application of agency safety markings

My understanding is that (at least in the USA) agencies own the copyright to their logo. Their weapon is the copyright law against infringement. They license a manufacturer for a well-defined but limited use of their logo. Most of the agencies certify manufacturing locations and perform periodi

RE: EN61000-6-2: Voltage dip immunity testing

Requirements are product dependent. Check the governing document, either generic or product-specific immunity requirements. EN61000-6-2 is a normative reference, not a governing document, e.g.: EN50130-4 Immunity requirements for Alarm systems calls out .5, 1, 5, 10 periods @ 60% reduction and

RE: PCB fuse trace

Doesn't it depend on the purpose of the fuse? If the circuitry is non-telco and voltages are < 42V you have wide design latiitude. Even if the agencies do not care, you should characterize the performance under abnormal conditions. At least one company uses printed fuses on PC accessory cards t

RE: R: R: Conducted Emissions on Telecom Ports

The defined I/O coupling methods for EN55022:1997 do not appear to accurately depict real-world shielding provided by "twisted" pair wiring, almost as if the test method were rigged against passing EMI with T-P cable. Considerable study went into development of tw

RE: R: R: Conducted Emissions on Telecom Ports

Paolo, You bring up an interesting point about FCC. FCC recognizes CISPR 22:1985 is as an alternative test method. The 1985 version does not specify emissions on LAN or telco. FCC Part 68 specifies conducted emissions only on mains cables over 450kHz

RE: R: Conducted Emissions on Telecom Ports

Meeting EN55022:1997 conducted emissions does not protect the product at the other end of the cabling. ANSI/IEEE 802.x and ISO/IEC 8803.x physical layer definitions protect the other unit of a two-point link. Compatibility testing performed by manufacturers assures both

RE: Conducted Emissions on Telecom Ports

Hello Group, North America has likely the largest installed base of Ethernet, Fast-ethernet, Token-Ring and Arcnet in the world. STP cable is seldom installed (some use it for secure installations to inhibit listening devices). We have no complaints of interfere

RE: Conducted Emissions on Telecom Ports

If LAN's cause interference, the mechanism would be radiated, not conducted. Testing may be moot on LAN's whose fundimental frequency lies between 150kHz and 100MHz; STP is the only way to 'pass'. Of course STP has safety implications due to earthing potentials.

RE: Conducted Emissions on Telecom Ports

LAN ports Testing Conducted RF Emissions on LAN twisted-pair lines is almost contrary to the intent of EN 55022 as Gary pointed out. Conducted emissions is more appropriate for asynchronous analog lines. LAN transmissions are digital and synchronous (except maybe

RE: Re(4): EN 61000-4-6 CDNs for a high speed bus.

Derek, I agree. Engineering analysis should evaluate fiber cable construction specifications. If coating is unspecified you need to investigate available types and justify your conclusions. Also be sure to test fiber I/O connectors for ESD susceptibility.

RE: Re(4): EN 61000-4-6 CDNs for a high speed bus.

High speed data communication is either Cat-5 TP or fiber. You can dismiss the need to test fiber by engineering argument Cat-5 TP should be tested using a clamp. David Sterner __ Reply Separator _

RE: Fwd:8591EM monitor output

Jim, Jeff, One way is to connect the HP to the unmodulated video input of a VCR and send the VCR's channel 3/4 output to your TV. Otherwise you can buy a modulator module at an electronics store and connect it to a 6V power supply or lantern battery.

RE: R: R: Voltage Breakdown

For many topical staticides (on IC tubes and containers) to function, the RH must be < 25%. David Sterner Ademco Syosset NY __ Reply Separator _ Subject: Re: R: R: Voltage Breakdown Author: "Jim Hulbert"

RE: NEBS: Trans\Vib & ISTA standards (International Safe

ISTA uses standard ASTM specifications for vibration so most labs can set it up. You can perform their drop test yourself on a concrete floor. ISTA also has a membership program and certified laboratories if you want full test documentation for insurance purposes.

RE: Evaluation Boards - again

Eval boards must comply with FCC requirements. Legally this does not mean they must meet Class A/B emissions levels. It is your call whether to meet Class A/B or mark the evaluation boards with the disclaimer of Section 2.803, see (e)(1)(v) under paragraph 2.803.

RE: EMC Symposia CD of 1955 to 1995

CD-ROM title IEEE EMC Society Volume IEEE001 through IEEE004 subjectSymposia Records 1955 to 1995 from Applied Microfilm Corporation Phone 617-893-7863 FAX893-0084 web site amc.bx.com e-mail a...@bx.com FYI Sympo

RE: EMC Symposia CD of 1955 to 1995

We were unable to print after upgrading from Win95 to Win98. Changing printer options, changing pritners both were futile. A re-install solved the problem. David Sterner, ADEMCO __ Reply Separator _ Subject

RE: EN 55022: 1998 Conducted Telecom

My previous company made Token Ring NICs for PC's. These met CISPR22 Class B. Compliance was achieved with capacitor networks. You need to filter bus noise from the card and high frequencies at the RJ jack. The PC bus filter (passive components) needs optimization to curr

RE: Smoke Alarms

APPLICABLE STANDARD NFPA-72 available from National Fire Protection Association, Quincey Mass. I also recommend the National Fire Alarm Code Handbood also published by NFPA - it is more user-friendly. REQUIREMENTS output:85dBA of 10 ft (3m) temporal

RE: Evaluation Boards

John, For developmental boards the pertinent paragraphs of CFR47 immediately follow the text you transcribed. FCC clearly exempts boards used for development at a customer facility under paragraphs (v) and (2), however the marking requirement applies.

RE: Evaluation Boards

Vic, There is no US legal obligation for EMC/safety on development boards so long as they are offered for sale. If a system containing the board is offered for sale, then the system must pass EMI requirements any market-imposed safety requirements (e.g. UL1950).

RE: EN60950, 3rd Edition, and . . .

IEC950 is not officially withdrawn yet. We received a draft CB-scheme test report February 2000 based on IEC 950, with 97-06 amendments. EN 60950 is based on IEC 950. Eventually IEC 950 will become IEC60950 to simplify the numerology. Provisional and draft documents

RE: Network Card Certification

Dan, It seems we are on a tangent here. For a network card you should first determine whether the card is sold OEM/retail and the countries where you intend to market. AGENCIES, DELIVERABLES UL/cUL/DEMKO approves to most I.T.E. safety specifications:

RE: Network Card Certification

Safety: UL1950US EN/IEC60950 International FCC CFR 47 Part 15: Class B residential or Class A (industrial) Re: FCC "FCC logo" for Class B is self-certified but you must test in the PC configuration specified in Par

RE: Where is 8.2.1 is EN55022 ?

Early B&W monitors were tested with scrolling "H" to produce maximum emissions and reproducibility. With the newer monitors, noise does not appear to be so pattern-dependent. For an unknown unit, I would experimentally try several screen displays to determine pat

RE: EMC Directive

Be careful of declarations that include a specific model manufactured by another company. Without engineering control or intercompany agreements the other product could change without notice, technically negating your declaration. Nothing prevents the competent b