Why fluke DSX5000 to use as 'expensive' jumper wire adapter DSX -
We all know that fluke DSX -
5000 jump line adapter is very expensive, similarly fluke DTX1800 also is same, why will have this kind of situation?
Small connector need to be so expensive?
We used to look at this article.
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From the three big questions encountered in wiring system test, some manufacturers no adapter integrated wiring system test plan, principle is reference fiber integrated wiring system to set a reference value in the test method.
In theory, does have its unique feature.
But if we from the actual situation to examine, you will find the problem.
If these vendors to see the instrument specifications, they will require you to use good jumper Settings for reference.
So what is a good jump line?
Is in accordance with ANSI/TIA/EIA -
1 and IEC61935 -
Standard tested, or you think is a good jump line?
And their sales personnel at the scene demonstration, using highly damaged jump line does not affect the final test the validity of the integrated wiring system.
Really the case?
First of all, what's good jumper?
You to buy jump line, no matter who is supplier, producer who it was, they will tell you their jump line is good, but the fact is that the ANSI/TIA/EIA -
Five kind of jump line 4 super standard is after numerous changes, the certification before the formal finalized, because of the performance of jump line deviation is very large, different manufacturers, different batch production of jumper wire on the electrical properties have very big difference, only certified testing by jumper wire jumper wire can be considered a 'good'.
No adapter and integrated wiring system test plan when doing the reference set, using only a jumper, formal integrated wiring system test need two jumpers.
Then the second jump thread on the performance of the impact of the test results, how to authenticate, how to guarantee?
You will find the live demonstration, vendors will have done for the first reference to set jumpers, and ignore the second root was not jump line for your reference.
This jumper is invisible, is a loophole.
Do demonstration instrument, the environment will formally integrated wiring system test environment than simple, technical personnel also like to use a good link quality, ensure that two integrated wiring system testing by the results.
Such subjects, the tester and onlookers are all's well that ends well.
But things tend to be more complex scene, a lot of link is not a big margin to offset the adverse impact of jump line.
If this is due to invisible jump line test results do not pass, who should pay?
The problem will cause shuffle pulling in this picture.
Of course we don't want to.
Simple for a parameter, for example: the characteristic impedance.
Jump line allowed within 5%, the characteristic impedance of deviation and link allows the characteristic impedance of deviation within 15%.
Assuming jump line characteristic impedance of 95 ohms, link the characteristic impedance of 115 ohms, two are according with the standard deviation range, but both the impedance of the deviation between each other for 20 ohms, deviation of 20%, as a signal reflection, can make the ideal test results?
Due to the characteristic impedance mismatch between jump line and the link of integrated wiring system test is not passed, who should pay?
In addition, if you use a special adapter, then connect the link only a RJ45 connection, if no adapter using integrated wiring system test plan, the link will be more an extra RJ45 connection.
As is known to all, RJ45 connection for the structure of the cable is damage effect, RJ45 crystal head performance is not stable, especially due to the more strict 6 class, basically can't buy on the market can be used for the user to manufacture its own jump line of crystal head.
If use without adapter test scheme, in between the two crystal head due to the NEXT, RL, FEXT interference signals such as repeated impact of superposition, the if treat?
This is not a simple set of reference can solve the problem.
Jump line head and crystal instrument interface and the coupling between the formal to test the link between modules of integrated wiring system coupling, can be completely different.
So integrated wiring system test, if not through, that who will pay?
Sounds cheap and simple solution, but in the real world, there is no looks so beautiful.
Using performance cannot be determined completely jump line, the integrated wiring system testing on site completely incapable of certification testing solution, in what is now the owner of project quality is more and more attention, it is like the blind leading the blind, a deep pool in the night, is very dangerous.
Above, fluke professional jumper wire adapter, saw that it was nothing special, but it USES the socket is the world's best, and the design of the circuit board, etc. , there is no doubt that make it the best adapter.
Using a fluke DSX5000 dedicated adapter adapter DSX - jump line
PC6S, first of all it's test jumper is SSTP integrated wiring system, the characteristic impedance of 100 ohms plus or minus 1 ohm, can be in the field calibration, in RL, NEXT, FEXT guarantee its not adverse impact on the result of the test, and secondly, it USES the test module, internal without cable, is completely integrated circuit connection, avoid the influence of RJ45 crystal head NEXT, such test results are correct, fair and scientific.
So why is it so expensive also there is a reason.