OmniTek 2.3 manual Graticule Type, Error Detection, Reference Levels, Ballistics

Graticule Type

The graticule for the PPMs may be changed from DBFS to alternative calibrations corresponding to different meter types (Nordic, BBC etc.). The required meter type is selected from a drop-down list of Graticule options. Note: The settings for the reference levels, alarm trigger points etc. automatically switch to the ones conventionally associated with the selected meter type, though you can then make any adjustments to these levels that you require. The range of the graticule and the meter ballistics are also automatically adjusted to reflect those of the selected standard.

The scope of the different graticules supported is shown in the following diagram:

Error Detection

Four potential error levels are defined – Clip, Over, Silence and Mute. For each error type, a level is defined at which the associated error will be logged (and an alarm sounded if enabled) if this level is maintained for a particular length of time (also defined within the dialogue).

The levels and the timeout set here also affect the logging and SNMP modules, which used to record details of the errors encountered (see page 121).

The settings made may be stored as part of an overall system configuration file, and are also saved when the application is closed and re-loaded on subsequent start-up.

Note: The settings in this part of the dialogue automatically change to pre-defined standard values when a different meter type is selected as the graticule type. It is therefore important to ensure that the required graticule type is selected before making any adjustments to these Error Detection settings.

Reference Levels

The two reference level settings control the position of the red and yellow markers alongside the individual PPM meter displays and the points in those displays at which the colour used for the meter bar changes from green to yellow and from yellow to red.

Note: These levels are also automatically set to pre-defined standard values when a different graticule type is selected, so again it is important to ensure that the required graticule type is selected before making any adjustments to these reference levels.

Ballistics

The values set in this part of the dialogue control the speed at which the meters respond to changes in meter level. The Integration value sets the time the PPM takes to rise to within 2dB of the peak value, while the Decay Time setting controls the time the PPM takes to fall by the specified percentage.

Page 92 OmniTek XR User Guide, Software Release 2.3