Newport Power Meters¶

Driver module for Newport power meters. Supports:

1830-C

class instrumental.drivers.powermeters.newport.Newport_1830_C(inst)¶

A Newport 1830-C power meter

Methods

`attenuator_enabled`()	Whether the attenuator is enabled
`disable_attenuator`()	Disable the power meter attenuator
`disable_auto_range`()	Disable auto-range
`disable_hold`()	Disable hold mode
`disable_zero`()	Disable the zero function
`enable_attenuator`([enabled])	Enable the power meter attenuator
`enable_auto_range`()	Enable auto-range
`enable_hold`([enable])	Enable hold mode
`enable_zero`([enable])	Enable the zero function
`get_filter`()	Get the current setting for the averaging filter
`get_power`()	Get the current power measurement
`get_range`()	Return the current range setting as an int
`get_status_byte`()	Query the status byte register and return it as an int
`get_units`()	Get the units used for displaying power measurements
`get_wavelength`()	Get the input wavelength setting
`hold_enabled`()	Whether hold mode is enabled
`is_measurement_valid`()	Whether the current measurement is valid
`set_medium_filter`()	Set the averaging filter to medium mode
`set_no_filter`()	Set the averaging filter to fast mode, i.e.
`set_range`(range_num)	Set the range for power measurements
`set_slow_filter`()	Set the averaging filter to slow mode
`set_units`(units)	Set the units for displaying power measurements
`set_wavelength`(wavelength)	Set the input signal wavelength setting
`store_reference`()	Store the current power input as a reference
`zero_enabled`()	Whether the zero function is enabled

__init__(inst)¶

attenuator_enabled()¶

Whether the attenuator is enabled

Returns:

enabled : bool

whether the attenuator is enabled

disable_attenuator()¶: Disable the power meter attenuator

disable_auto_range()¶

Disable auto-range

Leaves the signal range at its current position.

disable_hold()¶: Disable hold mode

disable_zero()¶: Disable the zero function

enable_attenuator(enabled=True)¶: Enable the power meter attenuator

enable_auto_range()¶: Enable auto-range

enable_hold(enable=True)¶: Enable hold mode

enable_zero(enable=True)¶

Enable the zero function

When enabled, the next power reading is stored as a background value and is subtracted off of all subsequent power readings.

get_filter()¶

Get the current setting for the averaging filter

Returns:

SLOW_FILTER, MEDIUM_FILTER, NO_FILTER

the current averaging filter

get_power()¶

Get the current power measurement

Returns:

power : Quantity

Power in units of watts, regardless of the power meter’s current ‘units’ setting.

get_range()¶

Return the current range setting as an int

1 corresponds to the lowest range, while 8 is the highest range (least amplifier gain).

Note that this does not query the status of auto-range.

Returns:

range : int

the current range setting. Possible values are from 1-8.

get_status_byte()¶: Query the status byte register and return it as an int

get_units()¶

Get the units used for displaying power measurements

Returns:

units : str

‘watts’, ‘db’, ‘dbm’, or ‘rel’

get_wavelength()¶: Get the input wavelength setting

hold_enabled()¶

Whether hold mode is enabled

Returns:

enabled : bool

True if in hold mode, False if in run mode

is_measurement_valid()¶

Whether the current measurement is valid

The measurement is considered invalid if the power meter is saturated, over-range or busy.

set_medium_filter()¶

Set the averaging filter to medium mode

The medium filter uses a 4-measurement running average.

set_no_filter()¶: Set the averaging filter to fast mode, i.e. no averaging

set_range(range_num)¶

Set the range for power measurements

range_num = 0 for auto-range range_num = 1 to 8 for manual signal range (1 is lowest, and 8 is highest)

Parameters:

n : int

Sets the signal range for the input signal.

set_slow_filter()¶

Set the averaging filter to slow mode

The slow filter uses a 16-measurement running average.

set_units(units)¶

Set the units for displaying power measurements

The different unit modes are watts, dB, dBm, and REL. Each displays the power in a different way.

‘watts’ displays absolute power in watts

‘dBm’ displays power in dBm (i.e. dBm = 10 * log(P / 1mW))

‘dB’ displays power in dB relative to the current reference power (i.e. dB = 10 * log(P / Pref). At power-up, the reference power is set to 1mW.

‘REL’ displays power relative to the current reference power (i.e. REL = P / Pref)

The current reference power can be set using `store_reference`().

Parameters:

units : ‘watts’, ‘dBm’, ‘dB’, or ‘REL’

Case-insensitive str indicating which units mode to enter.

set_wavelength(wavelength)¶

Set the input signal wavelength setting

Parameters:

wavelength : Quantity

wavelength of the input signal, in units of [length]

store_reference()¶

Store the current power input as a reference

Sets the current power measurement as the reference power for future dB or relative measurements.

zero_enabled()¶: Whether the zero function is enabled

MEDIUM_FILTER = 2¶

NO_FILTER = 3¶

SLOW_FILTER = 1¶