B-1
Appendix B
Pre-Qualifying Patch Cord Plugs
You may use the DTX-PCU6 patch cord adapters to test a sample of the patch cord plugs
before using them to build patch cords.
To get a general idea of how plugs will affect patch cord performance, test a sample of
the plugs terminated with 100
Ω
resistors. Figure B-1 shows this configuration. This test
is strongly recommended for Cat 6 plugs, as the Cat 6 NEXT pass/fail limits have little
margin for poor performance.
To test the plugs, select a cable type that matches the plug type, and select the Cat 6
patch cord test limit with the shortest length. If you are testing Cat 5e plugs and have
replaced the adapters' jacks with Cat 5e jacks, select the Cat 5e limit with the shortest
length. Run the NEXT and Return Loss tests in SINGLE TEST mode.
Refer to the TIA/EIA-568-B.2-1 or IEC 60603-7 standard for additional information on
test plug requirements.
DTX tester with DTX-PCU
patch cord adapter
Untwist the
wire pairs
as little as
possible
Sockets
soldered
onto wire
pairs
100
Ω
resistors
soldered onto plugs*
* Use 100
Ω
metal film or
RF chip resistors with a
tolerance of 0.1 % or better
TALK
MONITOR
ENTER
TEST
SAVE
SPECIAL
FUNCTIONS
SETUP
AUTO
TEST
SINGLE
TEST
EXIT
F1
F2
F3
RJ45 plug from
batch to be used
bal24f.eps
Figure B-1. Pre-qualifying RJ45 Plugs
