Line Impedance Stabilization Network
A line impedance stabilization network (LISN) is a device used in conducted and radiated radio-frequency emission and susceptibility tests, as specified in various electromagnetic compatibility (EMC)/EMI test standards (e.g., by CISPR, International Electrotechnical Commission, CENELEC, U.S. Federal Communications Commission, MIL-STD, DO-160 Sections 20-21-22).
LISN bụ ihe nzacha dị ala na-edobe n'etiti isi iyi ike AC ma ọ bụ DC yana EUT (ngwaọrụ n'okpuru ule) iji mepụta ihe mgbochi ama ama yana iji nye ọdụ ụgbọ mmiri ụda mkpọtụ redio (RF).. [1][2] na-ekewapụkwa mgbaàmà RF na-achọghị site na isi iyi ike. [2] Na mgbakwunye, enwere ike iji LISN were buo amụma e mere maka nchoputa na nnwale nnabata
Ọrụ nke LISN
[dezie | dezie ebe o si]Ihe mgbochi nke eriri kwụsiri ike
[dezie | dezie ebe o si]Isi ọrụ nke LISN bụ inye ezigbo mgbochi na ntinye ike nke EUT, iji nweta nlegharị anya nke mkpọtụ EUT dị na ọdụ ụgbọ mmiri LISN. Nke a dị mkpa n'ihi na mgbochi nke isi iyi ike na mgbochi nke EUT na-arụ ọrụ nke ọma dị ka nkesa voltaji. Ihe mgbochi nke isi iyi ike dịgasị iche, dabere na geometry nke wiwi ọkọnọ n'azụ yai. [3]
Induction a na-atụ anya ya nke eriri ike maka ntinye EUT na-arụkwa ọrụ n'ịchọpụta ụdị LISN ziri ezi dị mkpa maka nnwale. [3] ọmụmaatụ, njikọ dị n'ime ụlọ ga-ejikarị inductor 50 μH, ebe na ụkpụrụ nyocha ụgbọala, a na-eji inductor 5 μH eme ihe iji ṅomie ogologo waya dị mkpirikpi.
Ịchụpụ mkpọtụ isi iyi ike
[dezie | dezie ebe o si]Ọrụ ọzọ dị mkpa nke LISN bụ igbochi mkpọtụ dị elu nke isi iyi ike site na njikọta na usoro ahụ. LISN [3]-arụ ọrụ dị ka nzacha dị ala, nke na-enye nnukwu ihe mgbochi na mkpọtụ RF dị n'èzí ka ọ na-enye ohere ka ike dị ala na-agafe na EUT.
Njikọ dị nchebe nke ngwá ọrụ nlele
[dezie | dezie ebe o si]Dị ka ọ na-adịkarị, a na-eji ihe nyocha spectrum ma ọ bụ onye na-anabata EMI iji tụọ ihe n'oge ule EMC. Ebe ntinye nke ngwá ọrụ dị otú ahụ dị oke egwu ma nwee ike imebi ma ọ bụrụ na ọ karịrị akarị. LISN [1]-enye ọdụ ụgbọ mmiri na-atụle, na-abụkarị, 50 Ω mmepụta impedance. Ihe mgbochi [3] kwụsiri ike, ọrụ nzacha dị ala, na njirimara DC nke ọdụ ụgbọ mmiri LISN na-eme ka ọ dị mfe ijikọta mgbaàmà mkpọtụ dị elu na ntinye nke ngwá ọrụ na-atụle.
Ụdị LISN
[dezie | dezie ebe o si]N'okpuru otu ọkọlọtọ ule EMC, a chọrọ ụdị LISN a kapịrị ọnụ maka ịtụle na ịkọwa ọrụ EUT.
Ụdị dị iche iche nke LISNs dị maka nyochaa njikọ DC, otu-phase ma ọ bụ 3-phase AC. Isi ihe maka ịhọrọ ụdị LISN kwesịrị ekwesị [1] impedance, ntinye ọnwụ, ọkwa voltaji, ọkwa ugbu a, ọnụ ọgụgụ nke ndị na-eduzi ike na ụdị njikọ. Ogologo oge dị elu nke LISN na-arụkwa ọrụ dị mkpa mgbe a na-eji nyocha ikuku eme ihe maka ịkọ nsogbu ikuku. [3] na-eji LISN 100 MHz mee ihe n'ọnọdụ ndị ahụ.
Ihe edeturu
[dezie | dezie ebe o si]Edensibia
[dezie | dezie ebe o si]- ↑ 1.0 1.1 1.2 Line Impedance Stabilization Networks. Fisher Custom Communications. Retrieved on 21 January 2013. Kpọpụta njehie: Invalid
<ref>tag; name "Fisher" defined multiple times with different content - ↑ 2.0 2.1 Staggs. Using a LISN as an Electronic System EMC Diagnostic Tool. The Electro Mechanics Company. Retrieved on 15 December 2012.
- ↑ 3.0 3.1 3.2 3.3 3.4 SJS. Why So Many Different Types of LISNs?. Com-Power Corporation. Retrieved on 15 December 2012. Kpọpụta njehie: Invalid
<ref>tag; name "third" defined multiple times with different content
Ebe e si nweta ya
[dezie | dezie ebe o si]- MIL-STD 461E, REQUIREMENTS maka CONTROL nke Electro-Magnets Interference CHARACTERISTICS nke SUBSYSTEMS na EQUIPMENT, 1999