# Q330 Application Note

## XML Configuration File Notes

### Sensor A/B Assignments

By long-standing convention, Q330 parameter files place FBA sensor settings on channels 1-3 (sensor A), and seismological settings on channels 4-6 (sensor B). The Q330HR's fixed hardware configuration places the 26-bit QAPCHP on sensor A, with the 24-bit QAPCHP on sensor B. Consequently, Q330HR parameter files contain settings opposite those of Q330 settings: seismological settings on sensor A, and FBA settings on sensor B. These differences occur primarily in the token sections of the XML parameter files.

### XML Parameter File Names

The first field of the file name described the instrument type, Q330 or Q330HR. The second is the dash number of the instrument part number, where x denotes the packet memory available (0 = 8MB, 1 = 32MB). The third is the number of channels. 3-channel units have an additonal field for the sensor type each one supports, while the 'default' designation indicates the FBA settings are the factory default settings used for 3-channel units when they are configured at the factory. The version number is in the last field; the same value will be displayed in the configuration base tag field in Willard (Configuration | Configuration Cloning).

Typical XML parameter file names:

- Q330-x4-6ch-v01.xml
- Q330-x3-3ch-FBA-default-v01.xml
- Q330-x3-3ch-seis-v01.xml
- HR-x2-6ch-v01.xml

### FIR Filters

Beginning with recent software releases (Willard v1.81 build 200 & Baler v1.87), we introduced a new filter system that permits samples at all sample rates to be aligned on UTC boundaries. These require a different setting in the tokens for V?? and U?? data that are derived from other channels, e.g. VHZ. The new filter is "VLP389" for V?? data, and ULP379 for U?? data. These are the preferred filters if the user is running code versions the same or later than the versions mentioned above..

The XML parameter file default remains DEC10 because if someone is running an old Baler, it won't understand the token with the new filter specified.

Last updated 2006-06-26