EPS SK202A User manual

SK202Usermanual
SK202
1.Overview
Thisdocument guidesusershowto usetheSK202
modules
transmitsGigabit Ethernetsignalsatadistanceofseveralcentimetersina
contactlessway.
SK202opensanewscenefornetworkconnectionapplications.This
moduleintegratesanetworkPHYchipand
transceiverchip,
whichcanbesimplyconnectedtotheexistingEthernet
networkcable. Please
noteisthatboth
asdescribed in section3 ofthisdocument.
2.Connectionmethod
Figure1.
Schematicdiagramofusing SK202to
SK202 onlyneedsto be connected to thenetworkand powersupply,but itshould
be noted that thenetwork negotiation rate ofthePCsideandthe routersidearethe
same. IfthePCside isagigabit network, the rate automaticallynegot
SK202Awill be1G
.Thenthe rate
will automaticallynegotiate the rate withtheSK202Bto be1G
be connected, workingon Gigabit Ethernet.
Assumingthatthe routerhasa
with therouter.At thistime, the rate ofSK202Ais1G
areinconsistent, and thenetwork
Auto-negotiation below.
The
categoryofthe cablesused to connectthemodulestothe restofthenetwork
must be compatible with the rate that will benegotiated. 10/100 or1000Mbps.
note that SK202Aand SK202Bmust be used in pairs, andthe golden antenna part
needstobe ali
gnedwithadistanceofabout 3cm.
1of6
UserManual
SK202
ContactlessGbE
Thisdocumentguidesusershowto usetheSK202
A/Bmodules.
The
transmitsGigabitEthernetsignalsatadistanceofseveralcentimetersina
SK202 opensanewscenefornetworkconnection applications.This
moduleintegratesanetworkPHYchipand
ST60A2,
amillimeterwavewireless
whichcanbesimplyconnectedto theexisting Ethernet
replacing
noteisthatboth
SK202modulesmustat
thesamespeedmode
asdescribed insection 3ofthisdocument.
Schematicdiagramofusing SK202to
connectIPcamera
SK202 onlyneedsto beconnectedto thenetwork and powersupply,butit should
be notedthatthenetwork negotiationrate ofthe PCsideand the routerside are the
same. Ifthe PCsideisagigabitnetwork, the rateautomaticallynegot
ia
tedwith the
.Then the rate
ontheroutersidemust be1Gbps
, and the router
will automaticallynegotiate the rate withtheSK202Bto be 1G
bps
.Thenetworkwill
be connected,working on Gigabit Ethernet.
Assumingthatthe routerhasa
rate of100M, SK202Bwill negotiate a rateof100M
with the router.Atthistime,therate ofSK202Ais1G
bps,and theratesof
SK202
areinconsistent,and thenetwork
will not work.
Please refertosection ‘Controlled
categoryofthe cablesused to connectthe modulesto the rest ofthe network
mustbe compatible withtheratethatwillbenegotiated. 10/100 or1000Mbps.
note that SK202AandSK202Bmust be used in pairs, and thegoldenantenna part
gnedwitha distance ofabout 3cm.
The
pairof
transmitsGigabit Ethernetsignalsatadistance ofseveralcentimetersin a
SK202 opensanewscenefornetworkconnection applications.This
amillimeterwavewireless
replacing
a
thesamespeedmode
SK202 onlyneedsto beconnectedtothe networkandpowersupply, butit should
be noted that thenetwork negotiationrateofthePCsideand the routerside are the
tedwiththe
, and the router
.Thenetworkwill
rate of100M,SK202Bwill negotiate a rate of100M
SK202
A/B
Please referto section ‘Controlled
categoryofthecablesused to connectthemodulesto the rest ofthe network
must be compatiblewith theratethatwill be negotiated. 10/100or1000Mbps.
Please
note that SK202AandSK202Bmust beusedin pairs,and the goldenantenna part

SK202Usermanual
Figure2.
PhysicalpictureofSK202non
3.ControlledAuto-
negotiation
TheNetwork PHYchipembedded in theSK202issetinAuto
isabletosupport10/100/1000Mbps. InorderfortheSK202Aand
communicatetheymustoperate at thesamespeed.
connectorofblinkswhen a 1Gbpscommunication isestablished between the local
and thedistant PHY.
TheOrangeLEDsblinkswhen the communicationisat 10Mbps
ThePHYsontheSK202workindependentlyandeachone
automaticallywith thedeviceitisconnectedto.Sotwoindependent negotiationstake
place in parallel.
Asaconsequence, ifthetwo devices,suchasalaptopandacamera, advertise
diffe
rent maximumspeeds, the twoauto
Figure3.
FortheSK202communicationtoestablishcorrectlybetweendevices
advertisingdifferentmaximumspeedcapabilities, the auto
fa
stestdevice has to becontrolled.
2of6
PhysicalpictureofSK202 non
-contactconnector
negotiation
TheNetwork PHYchip embeddedin theSK202isset inAuto
-
negotiationmode and
isable to support10/100/1000Mbps. In orderfortheSK202Aand
SK202Bto
communicate theymustoperateatthe samespeed.
The GreenLEDon the RJ45
connectorofblinkswhen a 1Gbpscommunication isestablishedbetweenthelocal
The OrangeLEDsblinkswhen the communication isat10Mbps
ThePHYsontheSK202workindependentlyand eachone
automaticallywith thedevice itisconnectedto.Sotwoindependentnegotiationstake
Asaconsequence, ifthetwodevices,suchasalaptopandacamera, advertise
rent maximumspeeds,thetwoauto
-negotiation resultswill differ.
Noncontrolledauto-negotiationmayfail
FortheSK202communicationtoestablishcorrectlybetweendevices
advertisingdifferentmaximumspeedcapabilities, theauto
-
negotiationof the
stestdevicehastobecontrolled.
negotiationmodeand
SK202Bto
The GreenLEDon theRJ45
connectorofblinkswhen a 1Gbpscommunicationisestablished betweenthe local
TheOrangeLEDsblinkswhenthecommunication isat10Mbps
ThePHYsontheSK202workindependentlyandeachone
negotiates
automaticallywiththedevice itisconnectedto. Sotwo independent negotiationstake
Asaconsequence,ifthetwodevices,suchasalaptopandacamera, advertise
Forthe SK202communicationto establishcorrectlybetweendevices
negotiationof the

SK202Usermanual
Thanksto thecontrolledauto
with theSK202 willbesetupatthesamespeedthantheonebetweenthesecond
SK202 and the camera.
Figure4. Controlledauto-
negotiationisrequ
Alternatively,onecanintroduceaswitchoperatingatthesamespeedthantheslowest
deviceinorderto ensure the auto
Figure5.
Auto
4.Performance
evaluation method
If
you need to evaluate theimpact ofSK202onnetwork transmission, itis
recommended to useathird-
partytoolIPERF3.
3of6
Thankstothecontrolledauto
-
negotiation onthelaptop, onecanensurethelink
with theSK202will besetupatthesamespeedthantheonebetweenthesecond
negotiationisrequ
iredwhenthe2devicesdo not advertisethesame
maximum speedcapability
Alternatively,onecanintroduceaswitchoperatingatthesamespeedthantheslowest
devicein ordertoensuretheauto
-
negotiationresultwillbethesameonboth sides.
Auto
-negotiationresult controlledusingaswitch.
evaluationmethod
you need to evaluate the impact ofSK202 onnetworktransmission, itis
partytool IPERF3.
Onlyneed two
networkcable and two
negotiationonthelaptop, onecanensurethelink
withtheSK202will besetupatthesamespeedthantheonebetweenthesecond
iredwhenthe2devicesdo not advertisethesame
Alternatively,onecanintroduceaswitchoperatingatthesamespeedthantheslowest
negotiationresult will be thesameonboth sides.
youneedtoevaluatethe impact ofSK202on network transmission, itis
networkcable and two

SK202Usermanual
PCstocomplete the test.You
can download fromthe addressasbelow:
https://iperf.fr/iperf-
download.php
Iperf3 testmethod:
Figure6.
Refertothe figure 6
to connect tothe network.
needthesamespeed, such as
G
192.168.10.2, IPaddress
ofPC
cable fortesting
PC-
Aasa server, runcommand:
PC-
Basclient, run command:
192.168.10.2--
time100
IPERF
3will test100 secondsthrough UDPprotocol with1G bandwidth, and
there will be BER
and jitterresultoutput
Atserverside:
Atclientside:
If you careabout the output ofiperf3 test,
change the SK202modules
to a
thesamecommandforcomparison test.
4of6
can download fromtheaddressasbelow:
download.php
Iperf3testSchematicdiagramwithSK202
toconnect to the network.
The network adaptersoftwo PCs
G
igabitEthernetcontroller.IPaddressofPC-
A
ofPC
-B issetto192.168.10.3.
Please useatleast Cat
Aasaserver,run command:
iperf3--server
Basclient, runcommand:
iperf3 --udp --bandwidth1G--
client
time100
--len63k
3 willtest 100secondsthroughUDPprotocolwith 1Gbandwidth,and
and jitterresult output
astheblow picture.
Ifyou care aboutthe output ofiperf3 test,
acomparison
testisnecessary.
to a
RJ45connector
to directlyconnecttwoPCs,and use
thesamecommandforcomparison test.
The network adaptersoftwo PCs
A
isset to
Please useatleast Cat
5e-type
client
3will test100secondsthroughUDPprotocol with 1Gbandwidth, and
testisnecessary.
Youcan
todirectlyconnecttwoPCs,and use

SK202Usermanual
Figure7.
5.
Environmentconstraints
FortheRFwavestopropagatecorrectlyfromonemoduleto theother,caremust
betakennottointroduceany metallicobstaclein aKeepOutArea(KOA),ingreen
onthefiguresbelow.ThisKOAisaparallelepipedof22mm width and
Thelength being thedistancebetweenthe antennae,usually30mm.
Moreover,aSafeArea hasbeendefined,inorangeonthefiguresbelow.The
elementspresentin thisarea mayhaveanimpactonthemillimeterwaves
propagation.
ThisSafeAr
eaisaparallelepipedof60mmwidthandheight.Thelengthbeing
thedistancebetweentheantennae,usually
Incaseanelectroniccomponent,ametalpart,afastener,ascrew,somemetal
paint oranysortofreflectivesurface residesin thisvolu
analyzed.
Figure8.
Incase a metallic casingisto be usedaround themodules,it ismandatoryto
insertan opening forthemillimeterwavesto propagate. Thisopeningmaybefilled
5of6
Iperf3testSchematicdiagramwithRJ45 cable
Environmentconstraints
FortheRFwavesto propagatecorrectlyfromonemoduleto theother,caremust
betakennotto introduceanymetallicobstaclein aKeepOut Area (KOA),in green
onthefiguresbelow.ThisKOAisaparallelepipedof22mmwidthand
9mmheight.
Thelength being the distance betweenthe antennae, usually30mm.
Moreover,aSafeAreahasbeendefined,inorangeon thefiguresbelow.The
elementspresent in thisarea mayhaveanimpactonthemillimeterwaves
ea isaparallelepipedof60mmwidth and height. Thelength being
thedistance between theantennae, usually
20mm.
Incaseanelectroniccomponent, ametalpart,afastener,ascrew,somemetal
paint oranysortofreflectivesurfaceresidesin thisvolu
me, itsimpactmustbe
KeepOutArea (Green)andSafe Area (Orange)
Incase a metalliccasingistobe usedaround themodules, it ismandatoryto
insertanopeningforthemillimeterwavesto propagate.Thisopening maybe filled
FortheRFwavesto propagatecorrectlyfromonemoduletotheother,caremust
betakennottointroduceanymetallicobstacleinaKeepOut Area (KOA),in green
9mm height.
Moreover,aSafeAreahasbeendefined, in orangeonthefiguresbelow.The
elementspresentinthisarea mayhaveanimpactonthemillimeterwaves
ea isaparallelepipedof60mmwidth andheight. Thelength being
Incaseanelectroniccomponent, ametalpart, afastener,ascrew,somemetal
me, itsimpactmustbe
Incase a metallic casingistobe used aroundthemodules,it ismandatoryto
insertan openingforthemillimeterwavesto propagate. Thisopening maybe filled

SK202Usermanual
with ABSor
othermicrowave insensitivematerialsto maintainwater
opening should followthese guidelines:
•
The casingmust beplacedataround 2.7mmfromthe PCB toensurea free
space of0.8mmbetweenthe Horn antennae bodyand theABShousing.
• The
opening shouldbeminimum22mmlongand 9 mmwide,centeredon the 2
antennae,but it canbeenlarged.
•
Shouldthe casingbe placed furtherthan2.7mm fromthe PCB, the opening
dimensionswill haveto be
Thisissummarized
in the figurebelow:
Figure 9.
Date Version
NOV22020 1.0
6of6
othermicrowaveinsensitivematerialstomaintain water
tightness.This
opening shouldfollowtheseguidelines:
The casingmustbe placed ataround 2.7mmfromthePCB to ensurea free
spaceof0.8mm between the Hornantennae bodyand theABShousing.
opening should beminimum22mmlong and 9 mmwide, centeredon the2
antennae, butit can beenlarged.
Should the casing beplaced furtherthan2.7mmfromthePCB,the opening
dimensionswill have tobe
adjusted to prevent reflections.
inthefigure below:
Figure 9.
Openningin ametallichousing
RevisionHistory
Changes
InitialRelease
tightness.This
The casingmustbe placed ataround 2.7mmfromthe PCBto ensurea free
space of0.8mm between the Hornantennaebody andtheABShousing.
opening shouldbeminimum22mm long and9mmwide, centeredonthe 2
Should the casing be placedfurtherthan2.7mmfromthePCB,the opening