The Full Scan measurement mode provides two views (Bar Graph and Table).
Both views continuously update measurements for all the channels. Both
views also display all absolute signal level measurements and graphical
tick mark values from the current user-selected signal level units as
specified in global configuration. Finally both views contain an area
referred to as the Marker Channel Area (area above the bar graph or table).
This area displays information about the channel currently selected. Information
that is displayed in this area are; Overall pass/fail indicator, Channel
label, Channel type (Single, TV, Dual, Digital, or DOCSIS), and the Channel
Number. NOTE: Channel assignments are specified by the currently
selected channel plan and a channel plan must contain a minimum of one
(1) to a maximum of 999 channels.
BAR GRAPH VIEW
The Full Scan bar graph view provides:
-- evenly spaced vertical
- the frequencies, video, and audio levels, as well as the delta between
video and audio levels are displayed in the Channel Status area of the
screen.
Graph Area
The Full Scan Bar graph is comprised of channel numbers along the x-axis
and signal level on the y-axis. A vertical bar appears above each channel
number and the height of the bar represent the signal level of that channel.
The color of the video level portion of the bar color is black and audio
portion is gray.
Upon entering the Full Scan measurement screen, gray dashes will appear
in place of numeric values until a valid measurement is complete for that
value. NOTE: Audio carrier level measurement can be omitted for
a faster scan.
When audio carrier level measurement is turned on, each vertical bar that
represents a channel level reading will have two colors if that channel
has audio level reading. The audio level part of the bar is gray and video
level part is black, so the delta portion is clearly shown. NOTE:
Audio level measurement is not applicable to single type or digital channels.
NOTE: Use the Enter key to turn audio carrier level measurement
on or off.
When the marker is on a channel, the top of the marker is dark, and overstrike
portion of the channel is of the color light gray. Use the left and right
arrows to move the marker. With each non-continuous key press, the marker
will increment or decrement to the next or previous channel.
Channel Status Area (below the bar graph)
This area consists of the following:
- channel type icon (Single, TV, TV (scrambled), Dual, Digital, or DOCSIS).
- carrier frequency (in MHz), and measured signal level for the channel
which the marker is on.
- If audio level measurement is turned on, the audio icon, audio carrier
frequency (in MHz), and the delta value (in dB) between the video and
audio levels are also shown, using the following format. NOTE:
An Audio reading is not applicable to single type, DOCSIS or digital channels.
- If the channel is of dual type, the second audio level value reading
is shown, instead of the delta value.
- If the level reading is above or below the selected limits, an up or
down arrow is displayed after the measurement unit for video level and
the delta, not for the first and second audio levels.
TABLE VIEW
The Full Scan Table view provides each available channel number, their
video level readings, and available first and second video audio deltas.
NOTE: The highlighted channel in the Table view is synchronized with
the marked channel from the Bar Graph view. If the highlighted channel
is changed in the Table view, the marker position is updated when you
return to the Bar Graph view.
NOTE: When a channel fails the limits, a failure icon is displayed.
An up/down arrow is also displayed at the right side of the numerical
readings.
NOTE: When the Up/Down arrow is pressed continuously, the highlight
bar moves faster.