Chapter 11 - DOCSIS Analyzer
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Figure 11-11 DOCSIS speed test results
For uplink tests, the display is the same except of minor difference that the line for the file name
remains empty because random data is sent from the measuring receiver to the FTP server in this
case. After the end of the test, the measuring receiver deletes the data from the server.
If the respective status permits, you can exit the submenu again via
MODE
->
BACK
. The
message “Test running!” is briefly displayed if this is currently not possible. For downlink tests, you
can also use this button to cancel the test before it is finished. It is not possible to cancel uplink
tests before they are finished. The reason is that the data that was already transferred to a server is
not deleted after a cancellation. If you were to keep performing and cancelling the tests, the amount
of unusable data on the server would continue to grow and take up storage space. As a result, you
should always wait until the end of the speed test in the uplink direction.
After the speed test is completed (or cancelled), the DOCSIS analyzer returns to the continuous
update of all upstream and downstream measurement parameters.
11.4.5
PING test with the DOCSIS 3.0 analyzer
The PING test is a diagnostic tool that is well-known from the PC world. It can be used to assess
the quality of an IP connection. In this test, certain IP packets are sent to a host, and the host must
respond to them (insofar as it supports the protocol). The quantity of responses received to the
PING packets that are sent and how long this time delay is (round trip delay) are used to provide
qualitative information.
A PING test is triggered with the selection of the “PING” submenu in the DOCSIS analyzer. Since
an IP connection is required for a PING test, the user cannot access the submenu until the stack
status is “DHCP Complete” or “Operational.” The PING test is configured (number and time interval
of the PING packets to be sent) in instrument management (See chapter 17.11 - Configuration of
PING test in the DOCSIS analyzer).
As with the above submenus, the DS data and the most important US parameters appear in the
upper portion of the graphical display. The top row of the PING menu shows in the status of the test
(“initialized”, “running...” or “finished”).
