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PARAM, ERPREFDB

PARAM, ERPREFDB

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PARAM, ERPREFDB

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Parameter

Values

Description

ERPREFDB

Real > 0.0

Default = 1.0

This parameter can be used to specify the reference power value used to calculate Equivalent Radiated Power (ERP) in decibels (dB).

The Equivalent Radiated Power (ERP) in decibels can be calculated using the following equation:

erprefdb_ref_value

Where,

ERPdB is the Equivalent Radiated Power in decibels.

RHOCP is the value of the scale factor specified using the parameter PARAM, RHOCP.

ERPREFDB is the reference power value specified using this parameter.

Note:

The reference pressure is dependent on the units specified on the UNITS I/O Options entry. If the units are SI, the value is set as 2.0E-5 Pa. If they are CGS, it is set as 2.0E-4 barye. If they are MPa, it is set as 2.0E-11 MPa. If they are BG or EE, then it is set as 4.17E-7 lbf/ft2. If no UNITS data is present, the default value is 1.0.