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Use the Green jack to verify the device type
as a hub/switch or a PC; the presence of
Data and Link pulses; and the complete
speed and duplex capability of the device.
The TVR1000 must be ON before plugging in devices. First, plug
the LAN device into the Green jack. The "DATA" and "LINK" LEDs
display whether a pulse received from the device is from a "HUB"
or PC (to the TVR1000, a hub and switch are the same device). If a
"PC" is indicated, it means the Main Unit is receiving signals on pins
1 and 2 ("1,2"). A hub and switch are devices that transmit on pins 3
and 6 ("3,6"). Note about crossover cables: If a device is connected
to the tester using a crossover cable, the device will appear opposite
of what it is (see Appendix A for "straight" and "crossover" wiring).
The device's speed(s) of 10,100 and 1000 MB/s are displayed on
the Main Unit's "SPEED VERIFICATION" LEDs. The color of the
LEDs defines the duplex (Full or Half). If a device is capable of
multiple speeds and duplexes, all appropriate LEDs will light.
Example: A 1000 MB/s switch (capable of 10,100, and 1000 MB/s,
full and half duplex operation) connected to the tester with a straight
thru cable: Lights the 10, 100 and 1000 speed LEDs green under
the "Hub" column (green is full duplex). If the switch has "autocross-
over" capability it will light the same LEDs under the "PC" column (8
LEDs will be lit). See Appendix A for more on autocrossover. Note:
"Full duplex" always implies that half duplex is available.
Single Port testing
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Use the three jacks to determine the
negotiated speed and duplex between any
two LAN devices. The multiple jacks pro-
vide both a straight thru and a crossover
The TVR1000 must be ON before plugging in devices. Using the
two RJ45 straight thru patch cables provided with the TVR1000,
plug two LAN devices into the leftmost jacks (making a straight thru
connection between the two devices). Allow 3 seconds between
plugging in devices (the time it takes the TVR1000 to make a read-
ing). A reading is taken for each device and displayed across two
columns of LEDs. The device that appears as hub (or switch) has
its column of LEDs as does the device that appears as a PC. For
communication to exist, both columns must have a LED ON. If they
don't, move the cable plugged into the center jack to the jack on the
far right (making a crossover connection). Once both columns have
a LED lit, the devices are communicating and the required patch
cable has been determined. If only one column of LEDs comes ON
in either jack configuration a problem exists. Isolate the problem by
plugging one device at a time into the TVR1000's GREEN Jack (the
left jack). The device that does not show any activity on the LEDs
is causing the problem. If it is the remote device that is showing no
activity, there may be nothing connected at the far end of the cable.
See "Cable Tests Jack" later in this section to test for a device on the
other cable end.
The LED definitions described on the opposite page (Single Port
Inline testing
connection (if required).
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