Part Nos.
LanTest Pro Cat 5E Tester/Analyzer
LanTest Pro Cat 5E Tester/Analyzer Kit
Operating Instructions
Do not attach to energized cables. The LanTest Pro may
be damaged.
Improperly crimped, damaged or un-crimped plugs can
damage the jacks on the LanTest Pro. Inspect plugs for
proper termination and crimping before inserting into the
tester. Contacts should always be recessed into the plastic
grooves of the plug. Do not use with 6 position plugs (RJ11)
without an adapter.
• Auto-on and auto-off when testing cables, just plug both ends
into tester!
• Two-line by 16-character full alphanumeric LCD with icons for
clear results
• Cable test results displayed in wire map format with a message
line for shorts and split pairs
• Tests for shorts, opens, miswires, reversals and split pairs
with remote connected
• Pre-test – One-ended testing for shorts, opens and split
pairs (no remote)
• Displays PASS icon and sounds beeper (optional) for
T568A/B passing cables
• Length measurement in feet or meters using cable
capacitance method
• Tone generator mode for use with tone tracers
• Auto-off in any mode and low power consumption for
long battery life
• Snap-together case for easy storage of a remote and
convenient patch cable testing
The LanTest Pro has an LCD display and four momentary
buttons. One remote attaches to the main unit for storage or
patch cable testing. The rubber end cap at the bottom is the
battery compartment cover.
The LanTest Pro starts in an off condition when cable testing with
a remote. This yields maximum battery life and takes advantage
of the fact that the auto-on feature effectively synchronizes the
test cycle to the cable being connected for results in 2 seconds.
The tester powers on and testing begins automatically when
a connection from the main unit to the remote is sensed. The
tester will automatically power off within 5 seconds of the cable
being disconnected.
Upon completion of the test, the wire map display, ID and any
faults are displayed. The top line of numbers on the display
represents the connector pins on the main unit. The second
line of pin numbers is the connector pin numbers of the remote,
normally being the same as the top line for a normal data
cable. If there is a miswire, the numbers on the second line
will indicate the pin numbers detected. If no connection was
detected for some of the pins, the second line will be blank
in those pin locations. If a short is detected, the second line
will have a flashing “x” in that position and the specific short
condition displayed on the third line. If a split pair is detected,
those pin positions on the second line will be flashing the
pin numbers detected from the remote and the specific split
condition displayed on the third line. If there are multiple errors
to display on the third line, the messages are displayed in
sequence until all are displayed. The ID icon will have a number
directly below it indicating the remote ID number.
The LanTest Pro is powered on by pressing any of the four
buttons. The tester will turn on in the last mode used before
turning off. There are four modes of operation as described below.
In any mode, pressing the MODE button causes the mode select
screen to be displayed. The TURN OFF message is usually the
first one displayed. Subsequent presses of the MODE button
cycle through the other modes. Pressing the SEL button causes
the currently displayed mode to be entered.
Test/Pre-test – If a remote is sensed, the tester reverts to the
power off cable test described above (Test). If there is no remote,
the LanTest Pro uses the length and cable test capability to
attempt to measure a cable for shorts, opens and split pairs
(Pre-test). TEST and the current pair under test icons being on
indicate a test in progress. The results are displayed as messages
on the LCD. Because a test can take up to about 5 seconds to
complete, the SEL button, which immediately starts a new test,
should be pressed whenever a new cable is connected for
pre-test. Partial and erroneous results will be displayed until
a complete test cycle has been run on a cable.
Length – The length mode measures the length of a cable by
measuring its capacitance and using the capacitance per unit
length (length constant) to calculate the length. The length is
displayed on the LCD along with the current value of the length
constant. The SEL button changes the pair being measured in
a 1-2, 3-6, 4-5, 7-8 and auto-select sequence. The pair number
is displayed next to the length except in auto-select mode. If
a selected pair has a fault, the fault replaces the length reading
on the LCD. In auto-select mode, the tester automatically selects
a pair without a fault. The length constant is changed with the
up and down arrows. The CAL icon is on while adjusting the
constant. If network terminator patterns are found in length
mode, the tester will display “T Ring Network??”, “xbase-T
Network?” or “Network?” (all four lines terminated).
Tone – The tone mode generates audio tones for use with
tone tracers on all pairs, a selected pair or a selected pin. The
signal generated on a pair has the signal on one pin and the
complement of the signal on the other pin of the pair, yielding
a nominal 10 volts peak-to-peak across the pair. The SEL button
selects one of the four tone sounds provided. The up and down
arrows scroll through the pairs and pins that have signal on
them. All pins not being driven are held at tester ground.
Setup – The setup mode is provided to set user-selectable
options. The beep-on-pass can be turned on or off (default is on).
The pass criteria can be set for shielded or unshielded cables
(default is unshielded). The length and length constant can be set
for meters or feet (default is feet). If the length units are changed,
the tester converts the currently set length constant to the new
units on exit of setup. The up and down arrow buttons scroll
through the settable options. The SEL button changes the current
setting to the other option. On exit, the mode screen first offers
to return to the last mode used before entering setup.
The LanTest Pro monitors for voltage being present on the RJ
jack when off, in TEST/PRE-TEST mode or in LENGTH mode.
The “VOLTAGE!!” message appears on the screen and the beeper
sounds continuously until the voltage is removed.
1 2 3 4 5 6 7 8 S ID
Battery low
Adjusting length constant
Cable has shorts or splits
Setup mode
Cable passed T568A/B
Test in progress
Beeper off
ID number icon
(remote ID displayed below it)
Main unit
pin numbers
Alphanumeric characters
LanTest Pro LCD Display
LanTest Pro powers off automatically after 5 minutes of
continuously testing a cable when auto-on powered up the
tester. Disconnecting the cable restores normal function. Most
power-on modes will timeout in about 18 minutes, except for
tone, which is about 2.4 hours. Be sure to install a battery if
using for the first time—see battery installation.
Cable Testing
To Test a Patch Cable (see “Caution!” on page 1 about cables
with bad plugs)
1) Plug one end of patch cable into main unit.
2) Plug other end of cable into remote unit.
3) The tester will power on immediately and will indicate a test
in progress by displaying the TEST icon. It will be followed by
map results plus a PASS icon and a beep, if it passed both
the T568A/B standard and the configured shield criteria.
4) Disconnect patch cable after test. The test repeats every
5 seconds.
To Test Cable from One End
This can be done immediately after termination of one end of
the cable, because no connector or remote is required at the
other end of the cable. Attach a remote after the pre-test and
you are ready for a full test when the other end is terminated.
1) Attach one end of supplied one-foot jumper to main unit and
the other end to the wall plate or patch panel jack.
2) Turn on unit by pressing any button. If not in pre-test mode,
press MODE until TEST/PRE-TEST is displayed, than press
SEL button.
3) Results should appear within 5 seconds. Pressing SEL button
starts a new test immediately.
4) Disconnect cable after test. The test repeats every 5 seconds.
Application Hints: The jumper cables must be short compared
to the cable run for accurate open and split pair indication,
either no more than 10% of the total run length or 3 feet,
whichever is less. Cable being tested must be at least 4 feet
long for pre-test to work properly.
To Test Installed Cable (office jack to patch panel with remote)
1) Remove remote unit from main unit by sliding remote towards
top of the main unit.
2) Attach one end of supplied one-foot patch cable to the
remote and other end to the wall jack.
3) Attach one end of the second supplied one-foot patch cable
to the main unit and other end to the patch panel jack.
4) The tester will power on immediately and indicate a test
in progress by displaying the TEST icon. It will be followed
within 2 seconds by a wire map display of the results, plus
a PASS icon and a beep if it passed the set shield criteria
and T568A/B standard. The ID number for the remote will
also be displayed.
5) Disconnect cable after test. The test repeats every 5 seconds.
Application Hints: The jumper cables must be short compared
to the cable run for accurate split pair indication – no more than
10% of the total run length.
1) Plug RJ45 to F coax adapters into the remote and main units.
To Test Coax (tester off or in TEST/PRE-TEST mode)
2) Attach cable to be tested to F connectors.
3) The tester will power on if it senses the cable. If not, the
cable is open. The coax adapter is connected to the 1-2 pair
and will display “12” on the second line if good and flashing
“xx” if shorted.
4) Length may be measured as well by setting length constant
and selecting 1-2 pair.
To Place Tone on a Cable
1) Turn on unit by pressing any button. If not in tone mode,
press MODE until TONE is displayed, than press SEL button.
2) Press SEL until desired tone is selected. The up/down arrow
keys select the pin or pair(s) to carry the tone.
3) Connect cable to be traced to main unit. For best signal, do
not connect remote. Due to the shielding effect of twisted
pairs, the strongest signal is obtained by having one wire of
a pair carry tone. Selecting a single pin instead of a pair will
do this.
4) To turn tone off, press the MODE button until TURN OFF
is displayed, then the SEL button. The tone will turn off
automatically after about 2.4 hours.
To Measure Length
1) Connect cable to main unit. (A remote may be at the other end).
2) Turn on unit by pressing any button. If not in length mode,
press MODE until LENGTH is displayed, than press SEL button.
To change length between feet and meters, use setup mode.
3) Press up and down arrows to adjust length constant. If length
constant is unknown for a particular cable, a known length
of cable may be used to set the constant. Fifty feet or more
is suggested to minimize the resolution error (1 foot in 50
is 2% uncertainty). Connect known cable to tester and set
cable constant using up and down arrows until the length
reads correctly.
The PASS icon will be on if the cable has all pins properly
connected per T568A/B. The FAIL icon will be on if there is
a short or split pair. Neither icon will be on if there are opens
or miswires. The wiremap should be inspected for these types
of errors.
Definition of Errors – (See failure example drawings) The three
classes of faults discussed below are in order of severity. The
severity has to do with the ability of a more severe error to
mask lower severity errors. For example, if there is a short in
the cable; miswires and split pairs may not be detected for the
pairs involved in the short fault.
Short – The pair has a low resistance connection from one wire
of the pair to the other wire of the pair, or to any other wire in
the cable or the shield. A short in the TEST mode is indicated
by the FAIL icon being on and flashing Xs in the appropriate pin
position of the second line of pin numbers, plus one or more
error message lines listing all the pins shorted together. In the
PRE-TEST mode, the error messages are displayed.
Examples of Wiring Errors (Shielded)
(1 not twisted with 2; 3 not twisted with 6)
T568A/B Passing
Passing Cable
1 2 3 4 5 6 7 8 S ID
1 2 3 4 5 6 7 8 S ID
1 2 3 4 5 6 7 8 S ID
Split Pair
1 2 3 4 5 6 7 8 S ID
Miswire – A wire or both wires of a pair are not connected to the
correct pins at the other end of the cable. In TEST mode, the wire
map shows the pin numbers from line 1 (main) to line 2 (remote).
A reverse pair is a special case of a miswire in which the pair is
wired to the correct pair of pins, or to another designated pair of
pins, but the two leads are reversed. In PRE-TEST, this type of
error is not detectable.
Split Pair – A split pair is an error in the twisting of the wires
together within the cable. The cables generally are made up of 8
wires twisted together in 4 pairs. These 4 pairs are designated
as pairs by the wiring standards and are intended to carry a signal
and its return. 1 & 2, 3 & 6, 4 & 5 and 7 & 8 are the pairs designated by T568A/B for a RJ45 jack or plug. A cable can be wired
with correct continuity, but not with correct pairing. This most
often happens when the cable is terminated consistently at both
ends, but in the wrong order. A dynamic or AC test is required to
detect this type of error. If the only error is a split pair error, the
cable has correct continuity. If cross talk is not a concern, as in
flat satin cable, the cable is good if the only error is the split pair
error. In TEST mode, the pin numbers on the second line of the
wire map with split pairs flash, and an error message is displayed
listing the pin numbers of the pairs involved in the error. In the
PRE-TEST mode, the error message is displayed.
When the battery low icon is on, the battery should be replaced
as soon as practical. The cable testing results will become
unreliable when the battery reaches about 4.5 volts.
To Replace Battery
1) Remove rubber battery cap by pressing on bottom edge of
the cap with the heel of the hand until the cap pops off.
2) Pull battery out of cavity and remove battery snap.
3) Connect a new Alkaline 9 volt battery to battery snaps.
4) Slide battery into cavity and snap cap in place.
When installing a new battery, disconnect any cables connected
to the tester. The length and pre-test modes will be improperly
calibrated if a cable is present.
Physical Dimensions
Size: 14. 5 cm x 7.2 cm x 3 cm (5.7" x 2.85" x 1.2")
Weight: 176 grams (6.2 oz.) with battery and remote
Calling Black Box
If you determine that your LanTest Pro is malfunctioning, do not
attempt to alter or repair the unit. It contains no user-serviceable
parts. Contact Black Box Technical Support at 724-746-5500.
• the components involved in the problem;
Before you do, make a record of the history of the problem.
We will be able to provide more efficient and accurate assistance
if you have a complete description, including:
Battery Life (9V Alkaline battery, typical): times are for the full
capacity of the battery used continuously in one of
the following modes — Standby: 2.5 years
Cable Testing: 120 hours
• any particular application that, when used, appears to create
the problem or make it worse; and
Operating temperature: 0 to 50°C (32 to 122°F)
Storage temperature: –10 to 60°C (14 to 140°F)
Humidity: 10% to 90%, non-condensing
Cable Types: Shielded or unshielded, Cat-5E, Cat-5, Cat-4, Cat-3
and Coax
• the results of any testing (of the LanTest Pro itself) that you’ve
already done.
• when the problem occurs;
• the nature and duration of the problem;
Minimum cable length for testing for split pairs: 1 meter (3 feet)
Minimum cable length for PRE-TEST: 1.25 meter (4 feet)
Length measurement range (CAT5/6): 0 to 762 meters
(0 to 2500 feet)
Coax Cable: 100 ohms maximum DC resistance,
center conductor plus shield
Shipping and Packaging
If you need to transport or ship your LanTest Pro:
• Package it carefully. We recommend that you use the
original container.
• Before you ship the unit back to Black Box for repair or return,
contact us to get a Return Authorization (RA) number.
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