Starting to capture new data:

Pressing F10 causes the Sniffer to start capturing
data.  You will receive a warning if you are about to
overwrite data you have not yet saved to a disk file. 
Press ESC to abort the capture operation.  Press ENTER
to indicate that you do indeed want to load newly
captured data over the previous unsaved data.

The capture buffer is a 256K byte area used circularly;
the oldest data is discarded when necessary to
accomodate new data.

Inserting into the ring:

If this is the first time you have begun to capture
data, or if you have recently loaded a file from the
disk, or if you have made certain changes in the
protocol pre-filters, your station will have to endure
a ring insertion.

Ring insertion is slow -- about 8 seconds, and even
more in the case where you are the only station on the
ring.  Be patient.

Setting the amount of each frame to capture:

Normally the Sniffer will capture the entire contents
(as large as 4048 bytes) of network frames into its
buffer. You can indicate that you wish to keep only
the first 128, 256 or 512 bytes instead of the full
size by selecting the desired width in the "Frame
size" menu.

Resetting the capture filters:

Before starting to capture, check that you have set or
reset the capture filters and triggers the way you want
them.  It is easy to leave them so that the frames of
interest will not be collected, or so that collection
will not stop at the desired point.
