Finisar Surveyor manual Bit-Level Filtering

Capture and Display Filters 7

Creating Filters with Filter Templates

Bit-Level Filtering

Surveyor can filter at the bit level. To set a bit pattern, place the cursor within a byte field in the Edit/Create Custom Filter Template area. Press the Set Bit Pattern but- ton.The Bit-Level Pattern dialog box displays. The dialog box gives the number of the offset you are currently changing in its title bar. Enter any values for each bit that you want included in the filter. Leave values that you don’t care about marked with an X. An example Bit-Level Pattern dialog box is shown below:

When you view bytes within the Edit/Create Custom Filter Template area, those which have bit-level filters applied appear with “BW” in the field. If you place the cursor in the byte field and press the Set Bit Pattern button, the Bit-Level Pattern dia- log box pops up allowing you to view/change the current bit-level filter. A portion of the Filter Design window with the bit pattern indicator is shown below:

To delete bit-level filtering for a byte, select the “BW” in the byte field and press Delete.

If a filter with a bit pattern is loaded to a remote device that is not running Surveyor Release 4.0 or greater, the bit-level filter is ignored and all values for that byte are treated as “don’t care” values.

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