Test-Um NT750 - Manual (Page 7)

LanScaper
TM
2.8 To Change PING Addressing Mode
3.1 Voltage Check -
3.2 Cable Test Modes -
- Other options are changed similarly.
1) Turn on LanScaper™ by pressing PWR button and press the middle of the CABLE/NTWRK
button, which is marked SETUP. The percent battery remaining screen will appear briefly.
2) Press down arrow button three times, DHCP On or DHCP Off should be displayed.
3) Press SEL button to toggle between on and off. Displayed value is current setting.
4) Press CABLE or NTWRK to exit to a test or press and hold PWR button to power off.
- The LanScaper™ is a jack identifier, cable tester and
PING tester in one tester. The LanScaper™ has a backlit LCD display and eight momentary
buttons. The rubber end cap at the bottom is the battery compartment cover.
The LanScaper™ is powered on by pressing any one of three buttons: PWR, CABLE or NTWRK.
The tester will turn on in the last mode used before turning off if the PWR button is pressed. If the
CABLE button is pressed, the tester immediately starts executing the Jack ID test. Pressing the
NTWRK button causes the Blink Link LED test to begin. The LanScaper™ is turned off by
holding down the PWR button until the display goes blank. The tester will also shut off
automatically 15 minutes after the last button press in most modes, 30 minutes in Blink Link LED
mode and 60 minutes in Tone Generator mode. Short presses of the PWR button, toggles the back
light on and off. The back light turns off automatically about 5 minutes after being turned on.
Using the back light increases power consumption by between 20% and 50%.
There are eight test modes and a setup function as described below. The mode switch is the double
button immediately above PWR. The top button is labeled CABLE, the bottom button is labeled
NTWRK and the area bridging the two button is labeled SETUP. Pressing a mode button will
immediately end any currently running task and either begin the executing the first task of a new
category (cable or network) or display the next mode in the same category, waiting for a press of
SEL to begin the testing. Subsequent presses in the same category advances to the next mode,
rolling over to the first mode when the end is reached, still waiting for SEL to begin.
All tests, except Jack ID, start with a check for voltages on the pins on the
tester's jack. If found, the message “-Voltage Found- SEL Jack ID” is displayed, and the only
option for the user is to press the SEL key to start the Jack ID test to determine what type of
interface or what voltages are present on the jack. The tester monitors the jack to see if the voltage
is removed for five minutes. The selected test will continue if the voltage is removed, or the tester
will shut itself off after the five minutes. The exception to this behavior is in the Network Modes.
When voltage is found in these modes, the tester checks to see if it is Ethernet Phantom Power. This
is a voltage which is connected to the center taps of the Ethernet interface transformers of some
network equipment to power remote devices, like IP phones or wireless transceivers. This power is
seen by the LanScaper™ as voltage between the 1-2 and 3-6 pin pairs. The voltage found is
reported as “Enet Pwr Source Found = xV” for several seconds, then the test proceeds
automatically.
In most modes, the LanScaper™ is constantly testing and reporting results.
While it is recommended that an unknown jack connection is always verified by connecting to the
tester while it is powered off, it is fine to attach a known network or dead cable or jack to the tester
while it is running. In that case, it is most likely, a test will be in progress when a cable connection
is made.
The results of the test in progress at connection time are unreliable. In most such repeating tests,
the SEL button should be pressed to terminate the current test and initiate a new test.
3.0 FUNCTIONAL DESCRIPTION