# Parameters

The device's named configuration values. Each entry shows its type, default, unit, valid range or options, and access. See [Usage](usage.md) for how to read and write them, locally or over a client.

## default

```{eval-rst}
.. py:attribute:: wavelength
   :type: float
   :value: 632.8
   :no-index:

   Operating wavelength for sensor response correction in nm. The static range is the console-wide envelope; the limits of the attached sensor are pulled by synchronize_param_from_device(sync_constraints=True).

   :bdg-light:`nm` :bdg-secondary-line:`185.0 – 25000.0` :bdg-success-line:`read/write` :bdg-info-line:`field: 3.3 ms`

```

```{eval-rst}
.. py:attribute:: averaging
   :type: int
   :value: 1
   :no-index:

   Number of samples to average per measurement. 1 sample takes approximately 0.34 ms.

   :bdg-secondary-line:`1 – 3000` :bdg-success-line:`read/write` :bdg-info-line:`field: 2.4 ms`

```

```{eval-rst}
.. py:attribute:: power_range_auto
   :type: bool
   :value: True
   :no-index:

   Enable or disable the auto-ranging function for power measurements. When disabled, set the manual range via power_range.

   :bdg-success-line:`read/write` :bdg-info-line:`field: 3.0 ms`

```

```{eval-rst}
.. py:attribute:: power_range
   :type: float
   :value: 0.01
   :no-index:

   Manual power measurement range (upper limit) in W; effective when power_range_auto is off. The static range is the console-wide envelope; the limits of the attached sensor are pulled by synchronize_param_from_device(sync_constraints=True).

   :bdg-light:`W` :bdg-secondary-line:`1e-09 – 200.0` :bdg-success-line:`read/write`

```

```{eval-rst}
.. py:attribute:: power_unit
   :type: str
   :value: 'W'
   :no-index:

   Unit for power readout: W (Watts) or DBM (dBm).

   :bdg-secondary-line:`one of: W, DBM` :bdg-success-line:`read/write` :bdg-info-line:`field: 3.9 ms`

```

```{eval-rst}
.. py:attribute:: attenuation
   :type: float
   :value: 0.0
   :no-index:

   User-defined attenuation/gain correction factor in dB applied to the measurement.

   :bdg-light:`dB` :bdg-secondary-line:`-60.0 – 60.0` :bdg-success-line:`read/write` :bdg-info-line:`field: 2.6 ms`

```

```{eval-rst}
.. py:attribute:: beam_diameter
   :type: float
   :value: 1.0
   :no-index:

   Beam diameter used for power density calculations in mm.

   :bdg-light:`mm` :bdg-secondary-line:`0.001 – 25.0` :bdg-success-line:`read/write` :bdg-info-line:`field: 2.7 ms`

```