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senses if the far device is connected to the cable by searching for
continuity through the device. It does not matter if the far device is
powered-up or not.
Step 1: Turn tester ON and connect the jack that connects to the
hub/switch or PC to the TVR1000's Cable Tests jack as shown.
Step 2: LEDs "1,2" and "3,6" as a minimum should be ON, if
a device is connected to the far end of the cable. If all four LEDs
"1,2", "3,6", "4,5" and "7,8" are ON, that is a good indication that a
hub/switch or PC is connected to the other end of the cable and that
the installed cable is good.
Test example #5. Tracing where a cable is located in the wiring
closet (or to which LAN port it is connected). Note: This is a
general explanation of using the Remote Probe to trace a tone
generated by the Main Unit to locate cables. It is an easy way to
determine what hub port your PC's cable is using or to locate a
cable in a crowded wiring closet.
Step 1: Insert one end of the cable you wish to trace (and/or test)
into the TVR1000 Main Unit's Cable Test jack (the jack places a
tone and a wiring signal code on the wire).
Step 2: Take the Remote Probe to the location where you expect
the opposite end of the cable to be located.
Step 3: Press the "TRACE" button of the Remote Probe.
Step 4: Move the Remote Probe over the cable. For best results
sweep the probe up and down the cable. Listen for the sound of
tracing tones. If you hear them, you have located the cable.Tracing
tones is usually best on wires that are disconnected from any power
source. Existing signals on lines can sometimes interfere with the
tone signal.
You will notice that the Main Unit's tone generator circuitry steps the
tone from one pair to the next (i.e. "1,2" then "3,6" then "4,5" then
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"7,8'). Listening to the missing gaps in the tone signal can some-
times be helpful in understanding a problem.
Maximum sensitivity occurs when the Remote Probe's tip is held
parallel to the conductors carrying the tone. It is normal for the
volume to change along a cable's path (volume can change as the
cable length changes; as the angle of the probe to the conductor
changes; as the signals on or around the cable).
Caution: electrical cables carry a wide variety of signals. They are
dangerous. Telephone circuits employ a –48V battery voltage. When
ringing, voltages are much higher (90 V RMS on top of the –48V).
Telephone signals should not be on the same cables as LAN signals
but exercise caution. If you are unsure of safe procedures, do not
continue.
Test example #6. Testing the cable's pair configuration (using
the Main Unit and the Remote Probe). No other tester provides
the ability to locate the cable (see tracing, above) and simply plug
it into the Remote Probes jack to determine its pairs configuration.
This is called the "One step" feature. Note: With this test you can
determine if your cable is straight thru or crossover; if it has inverted
pairs (cable fault); and what pairs are terminated. To test a cable's
pair configuration:
Step 1: While leaving the far end of the cable plugged into the Main
Unit's Cable Test jack, plug the cable end you just located in test
example #5 into the Remote Probe's RJ45 jack.
Step 2: The LEDs on the Remote Probe will tell you the following
information about the cable:
PAIRING: If pairs "1,2" "3,6" "4,5" or "7,8" are present and are of cor-
rect polarity, the pair's LED will light green. The Remote Probe tests
for pairing and polarity according to the AT&T 258A standard
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