The Difference Between A Single-level Patch Cord And A Channel-level Patch Cord
Testing parameters of patch cord in Echo loss and parameters for near-end crosstalk ratio channel, which margin is higher than that of 5db at high frequency (≧16mhz), and the higher the frequency, the larger the gap.
The differences for test:
Near end crosstalk, echo loss is identified as "one way", in other words, when selecting the patch cord single standard for testing the patch cord, it must be tested with the fluke monomer test dedicated adapter. The device tests only the performance parameters of the crystal head connected to the host terminal by the patch cord. Therefore, to verify that a patch cord is qualified, that is to determine whether a patch cord is qualified, it takes two tests to determine. The modules in the fluke patch cord test adapter have a useful life. In general, if you plug 10,000 times, you need to replace the new test module, this is why the single level patch cord is much more expensive than the channel level patch cord.