Noise Figure Measurements Option (K30) R&S FSL
1300.2519.12 4.258 E-11
ENR Settings
Opens the ENR dialog box.
The abbreviation ENR stands for excess noise ratio. Correct ENR values for the noise source
are essential to perform accurate measurements. They are used to calculate the effective noise
temperature of the noise source that in turn is used for calculation of measurement results.
Under ENR Settings, the default ENR value is 15 dB as a constant value that is valid for all
frequencies.
Under ENR Table, the frequency–dependent ENR values are listed. The list can contain up to
100 RF/ENR pairs. The order of the RF values in the list is not important. To modify this table,
proceed as described in "To edit tables" on page 4.248. ENR tables can be saved and recalled at
any time via the FILE key (for details refer to the section "Saving and Recalling Settings Files –
FILE Key"). Additionally to the data saved by the basic unit, all data entered in the ENR Settings
dialog box are saved.
The ENR Settings dialog box contains the following elements:
ENR Settings Selection
ENR Constant
Room Temperature
ENR Table
Remote: CORR:ENR:MEAS:TABL:DATA 1MHZ,10,2MHZ,12 (ENR Table)
Selection
Defines the used ENR values.
Constant The value specified in the ENR Constant field is used for all frequencies. The
entries of the ENR Table are ignored.
Table The entries of the ENR Table provide the basis for the ENR values. Between
these values the R&S FSL uses interpolated values.
Remote: CORR:ENR:MODE SPOT
ENR Constant
Specifies the constant ENR value of the noise source that is used throughout the entire
frequency range. This parameter is only editable if, in the Selection list, Constant is selected.
Remote: CORR:ENR:SPOT 30
Room Temperature
Specifies the current room temperature as an absolute value in Kelvin. This value is used in the
calculation of the noise results.
Remote: CORR:TEMP 291.50
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