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Test example #1. Using a Single Port test to determine a PC or
Hub/Switch's capabilities. This procedure tests if a LAN port is
ON and capable of transmitting; verifies its Device Type (hub/switch
or PC); and displays its complete Speed and Duplex (a 10,100,1000
device lights all 3 speed LEDs). Full duplex includes half duplex.
Equipment required: The TVR1000 Main Unit and a straight thru
RJ45 patch cable.
Step 1: Turn ON tester.
Step 2. Make connections: Connect the LAN device directly to the
TVR1000's GREEN JACK using a straight thru RJ45 patch cable.
Step 3: ACTIVITY AND DEVICE TYPE TEST. Any activity on
the DATA and LINK LEDs indicate that the LAN device is ON and
transmitting. The DEVICE TYPE is displayed on the "DATA/LINK"
LEDs indicating a "HUB" or a "PC". If it indicates what you expect,
all is well. If it indicates the opposite, a crossover cable might exist
somewhere between the LAN device and the tester. This is not
necessarily bad, but it is something to take into consideration when
diagnosing problems that might occur.
Test example #1
green jack
Single port test
PC or hub/switch
Straight thru patch cable
(included)
Plug into
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Step 4: SPEED/DUPLEX TEST: The data rate(s) of 10,100 and
1000 MB/s are displayed on the Main Unit's "SPEED VERIFICA-
TION" LEDs. The color of the LEDs define the duplex (Full or Half).
If you are testing a device that is capable of multiple speeds and
duplexes, all appropriate LEDs will light.
Analysis of test example #1:
Using the Green jack to verify activity and whether the device
is a hub/switch or a PC. The first step in determining whether the
LAN device is operating and whether it is cabled as a hub/switch or
PC is to plug the device into the GREEN JACK. The LEDs on the
left side labeled "DATA" and "LINK" display whether a pulse received
from the device is from a HUB or PC (the pulse can be a Data
packet or a Link pulse). A "PC" is a device that transmits on a pair of
wires that use pins 1 and 2 ("1,2"). A "hub" (and switch) are devices
that transmit on pins 3 and 6 ("3,6"). The TVR1000 bases its testing
on this standard. Consequently, the configuration of a cable affects
the results of the test. For instance, if a hub/switch is connected to
the tester using a crossover cable, the hub/switch will appear as a
PC.
Analysis: Using the Green jack for SPEED VERIFICATION. For
LAN devices to operate, they both must be operating at the same
speed and duplex. Thus, understanding the speed and duplex capa-
bilities of a LAN device is very important. The first step in verifying
the speed of a LAN device is to plug it into the GREEN JACK of the
Main Unit. Because the TVR1000 does not attempt to influence the
speed of the device, the speed/duplex displayed is the capability of
the device. For instance, a device capable of 10,100, 1000 MB/s and
full and half duplex will light 3 LEDs (10, 100, 1000), all green (full
duplex). "Full duplex" includes half duplex capability.
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