Agilent Technologies 78581B, Installation And Service Manual

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Installation
8-21
Qualify UTP Cable
If the UTP cable installation has not been qualified within the past 12
weeks, Agilent or an Agilent representative must requalify the installation.
Following is the procedure for qualification.
Note Calibration of the PentaScanner must be done the day of the test.
1. Insert newly terminated end of wall box UTP edge connector into test
adapter B.
2. Attach the short RJ 45 patch cord between Microtest 2-way Injector
and test adapter B.
3. Go to patch panel near SCC.
4. Attach an RJ 45 patch cord between Microtest PentaScanner Tester
and patch panel port to be tested.
5. Turn on PentaScanner and start Autotest.
If tester displays “Injector not found,” move RJ 45 patch cord until
correct port is found. This port should be labeled as that bed number.
6. Perform Autotest (see PentaScanner User’s Guide for proper use of
Microtest PentaScanner).
The following table gives acceptable values.
Tests Specifications
Cable Length Less than 90 meters (295 ft.)
Splices in Cable None
DC Resistance Less than 8.5 ohms
Mutual Capacitance Less than 5.6 nanoFarads per 90 meters (295 ft.)
Structural return loss 1 - 20 Mhz: 23 dB
20 -100 Mhz: 23 -10 log (f120) dB
Impedance 100 ohms +1- 15%