Time formats, NW utilization and frame size:

You may elect any one of six measures to be shown in
the "time" column of the summary window.

Delta time:

"Delta time" shows the time in seconds (to the nearest
millisecond) between a frame and its predecessor.  The
times will change when the display filters are changed
to reflect only those frames which are being displayed.

Relative time:

"Relative time" shows the time of each frame in seconds
and milliseconds relative to the currently marked
frame.  The marked frame is indicated by the "M" in the
summary window and can be set to the currently
highlighted frame by using the F2 function key.

You can jump to the marked frame from an item in the
Display Options menu accesible with the F6 key.

Absolute time:

This choice shows the time-of-day at which each frame
was collected, in HH:MM:SS.SSS form.  The least
significant digit, as in all the time formats, is
milliseconds.

The time is based on the internal clock of the Sniffer
and can be checked for accuracy or reset using the DOS
"time" command.

Network utilization averaging:

"NW utilization" shows an estimate of the average
network utilization in the vicinity of each frame.  It
is the percentage of the total available bandwidth (4
Mbits/second) which was used by the displayed frames
during a time window centered around each frame.

You may select the window width to be 1, 10, 100 or
1000 milliseconds.  Choosing a large window will
smooth out short term fluctuations;  choosing a small
window will show more instantaneous changes.

Network Utilization average (continued)

Remember that the utilization shown represents only the
frames which appear in the display, and not those that
have been filtered out.

If there are protocol or pattern filters set, you may
inadvertently miss significant amounts of traffic by
supressing lower protocols levels which are actually
transmiting much of the data.  Beware of this and
exercise caution in reaching conclusions based on the
network utilization display.

Bytes and Cumulative bytes:

Selecting "Bytes" displays the size of each frame (in
bytes, starting with the AC field) on the Summary line. 

Selecting "Cumulative bytes" displays the total
quantity of traffic (in bytes) between each frame and
the currently marked frame.  The marked frame is
indicated by the "M" in the summary window and can be
set to the currently highlighted frame by using the F2
function key.
