| Following the EN50289-1-6: 2002 measurement, the Surtec's
transfer impedance test environment offers a survey and report system for your fully shielded solution.
The required value listed in the TIA/EIA-568-B.2 and
IEC 60603-7-5 standards
The shield transfer impedance of ScTP connecting hardware,
measured in accordance with clause K.8 shall not exceed the
values determined using the formula.
All Types : ZTconn = 40¡Ô f from 1MHz to 4 MHz
ZTconn = 20 f from 4MHz to 100 MHz
Where¡G ZTconn is the transfer impedance of the connecting
hardware shield in m£[ f is the frequency in MHz.
The transfer impedance is the intrinsic electromagnetic shielding
property of cables connectors. It's a fundamental value of a
shield's performance. Our test implements develop to give
high-precision measurement on a standard frequency range, from 1MHz to 100MHz.
Maximum connecting hardware shield transfer impedance (m£[)
| Device under testing |
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One end of the coaxial or quasi coaxial system is matched with a well screened resistor. The other end is prepared with a connector to make a connection to the generator. |
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| Matching circuit |
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When R 1 > 50 £[¡A
Rs=s 0 ¡Ô (1-(R1/s0))
¡A
Rp=R1/ ¡Ô (1-(R1/s 0 ))
at this time
When R1 < 50 £[¡A
Rs=R1 ¡Ô (1-(s 0 /R1))
Rp= s 0 / ¡Ô (1-( s 0 /R1))
at this time
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| Tube |
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Small Size :for keystone jack
Medium Size
:for Surface mount box outlet
LARGE SIZE:for patch panel
To test the R 2 Value (Resistor R 2 )
R2 ¡Ü 1.4 * 60 ¡ë (d 0 ¡þ d c ) ¡V 50
Where
d o inner diameter of tube
d c outer diameter of cable screen |
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