Subsynchronous oscillation frequency groups

Frequency groups define specific ranges within the subsynchronous spectrum (0–50 Hz) that your meter monitors. For each group, your meter calculates the RMS magnitude of oscillations within that range. This allows for targeted analysis of frequencies that are most relevant to your system.

Formatting Rules

Enter frequency groups as a single string in the Subsynchronous Oscillation Module’s Frequency Groups setup register. Each group specifies a lower and upper frequency bound in Hertz.

Rule	Description	Example
Basic format	Each group must be enclosed in square brackets with lower and upper bounds separated by a comma.	[10.0,11.5] is interpreted as 10.0–11.5 Hz
Decimal precision	Enter up to one decimal place. Extra digits are ignored.	[10.0,11.567] is interpreted as 10.0–11.5 Hz
Optional bounds	If one bound is omitted, the module uses the default minimum or maximum.	[5.0,] is interpreted as 5.0–50 Hz [,10.5] is interpreted as 0–10.5 Hz
Enter at least one bound	At least one bound must be specified.	[,] is not valid.
Character limit	All groups combined must not exceed 600 characters.	N/A

Example input and interpretation

Input:

[0.1,49.4][10.0,11.567][5.0,][,10.5]

Interpretation:

Input range	Interpreted range	Frequency group
[0.1,49.4]	0.1–49.4 Hz	1
[10.0,11.567]	10.0–11.5 Hz	2
[5.0,]	5.0–50 Hz	3
[,10.5]	0–10.5 Hz	4