Options and Accessories
1503C MTDR User Manual
3–9
Collision Test is: Off/On
CAUTION.
The collision signal will stop traffic on the network. This might abort
many application programs and might cause communications problems.
This test is similar to the carrier test except that it asserts a -1.7 VDC signal to
simulate a collision on the network.
The entries in this menu allow you to set up custom tests on networks in addition
to the preset ones in the Ethernet Menu. This is intended for users who are familiar
enough with Ethernet to anticipate the results. Changes in this menu can affect the
state of other entries that are mutually exclusive or necessary for the chosen entry.
For example, turning on the Collision Output Signal is: Off/On will also turn off the
carrier output signal because only one voltage can be sent out.
Only the function of the entries unique to Option 06 will be explained. For the
others, refer to the Operating Instructions chapter of this manual.
50 DC Termination is: Off/On
CAUTION.
This must be on for use on a working network or reflections will cause
collisions on the network.
This entry is a duplicate of the entry in the Ethernet Menu. Its function is to allow
direct control of the low frequency termination inside the 1503C. With the 50
W
DC
termination is: On, the 1503C will functions normally to test the cable. This is
usually the only test needed to check a network cable.
Carrier (-1.05 V) Output Signal is: Off/On
CAUTION.
The carrier signal will stop most traffic on the network. This might abort
many application programs and might cause communications problems.
When this test is on, the 1503C will assert a -1.05 VDC level on a 50 load (-2.1
VDC open circuit). This signal is intended to be equivalent to the average of a
standard Ethernet transmission and should trigger the carrier detect circuit on all the
transceivers. Because most applications will defer transmission when this signal is
present, it can be used to test transceivers and systems, or to reduce traffic for 1503C
testing.
Descriptions of Tests in
the Setup Menu/
Acquisition Control Menu
Summary of Contents for 1503C
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