To fully understand Smart Scan measurement mode results, you should be
familiar with the Smart Scan bar or line graph and the viewing options
available.
Arrow Keys
You can use the left and
right arrows to move the marker.
With each non-continuous key press, the marker increments or decrements
to the next or previous channel in the smart scan. The values printed
below the graph for the Frequency, Level, and Deviation correspond to
the selected channel.
Use the up and down arrows to adjust the graph for best viewing of the
signal level measurements. NOTE: Each arrow key press changes the
reference setting by one (1) dB.
Softkeys
Four softkeys on the smart scan screen provide the following options:
FILE
Select Save... to save a completed
test.
Select Open... to open an
existing Smart Scan measurement file to view previously collected data. To
select an item, use the arrow keys to choose the menu item you prefer
and press ENTER to make your selection.
VIEW
Select Auto Reference to automatically view measurement results
in the best reference setting on the bar graph (Keystroke shortcut: SHIFT
9). NOTE: For best reference setting results you may have to select
the Auto Reference button more than once (up to three times).
Select 1, 2, 5, or 10 dB/div to adjust the vertical resolution of
the graph for the best viewing.
Select Single Channel to view the level measurement screen for a
single channel selected by the marker. (First, use the arrow keys to move
the marker to the preferred channel. Then select this option from the
VIEW menu.)
Select Full Scan to view the full scan measurement screen.
Select Tilt to view the Tilt measurement screen.
Select Pause to suspend measurement updates (Keystroke shortcut:
SHIFT 8).
LIMITS
Select a set of measurement limits by using the arrow keys to highlight
the limit set you prefer - Off, Cable Modem, Ground Block,
Tap, or TV. Or select Edit to access the CONFIGURE
MEASURE - LIMIT SETS configuration screen, where you can edit limit-set
parameters to meet your needs. Use the arrow keys to choose the menu item
you prefer and press ENTER to make your selection. NOTE:
When you select Edit, the limit-set parameters you define will
remain constant in all channel plans and measurement modes.
SETTINGS
Use the arrow keys to choose the menu item you prefer and press ENTER
to make your selection.
Select Animation On to turn on the smart scan animation option. When animation
is enabled, the mode will take the operator through a level screen and a type
compensated screen before finally arriving at the final smart scan mode screen.
These extra screens are designed to give the user a tutorial about how the smart
scan works so the user can follow the steps the mode takes to go from a level
measurement to a type compensated level measurement, and finally to a type and tilt
compensated measurement, which is the deviation value.
Select Bar Graph to view the type compensated level graph and the
smart scan graph as a bar chart (similar to the full scan mode) NOTE:
The selected graph type does not change the values printed, but is simply offered
as a means for users to customize their smart scan experience.
Select Line Graph to view the type compensated level graph and the
smart scan graph as a filled line graph (similar to the sweep modes) NOTE:
The selected graph type does not change the values printed, but is simply offered
as a means for users to customize their smart scan experience.
Select Channel Plans to choose an alternate channel plan or to edit
the configuration of the existing plan. Use the arrow keys to choose the
menu item you prefer and press ENTER to make your selection. NOTE:
If the current channel plan selected has no channels that can be included in
the smart scan, an error dialog will pop up, showing the following prompt:
There should be at least one channel in the channel plan.
Press OK and go to downstream channel plans to select a plan which
has at least one channel, or to create a new channel plan.