SR830 Lock-in Amplifier

class pymeasure.instruments.srs.SR830(resourceName, **kwargs)

Bases: pymeasure.instruments.instrument.Instrument

adc1

Reads the Aux input 1 value in Volts with 1/3 mV resolution.

adc2

Reads the Aux input 2 value in Volts with 1/3 mV resolution.

adc3

Reads the Aux input 3 value in Volts with 1/3 mV resolution.

adc4

Reads the Aux input 4 value in Volts with 1/3 mV resolution.

auto_offset(channel)

Offsets the channel (X, Y, or R) to zero

aux_in_1

Reads the Aux input 1 value in Volts with 1/3 mV resolution.

aux_in_2

Reads the Aux input 2 value in Volts with 1/3 mV resolution.

aux_in_3

Reads the Aux input 3 value in Volts with 1/3 mV resolution.

aux_in_4

Reads the Aux input 4 value in Volts with 1/3 mV resolution.

aux_out_1

A floating point property that controls the output of Aux output 1 in Volts, taking values between -10.5 V and +10.5 V. This property can be set.

aux_out_2

A floating point property that controls the output of Aux output 2 in Volts, taking values between -10.5 V and +10.5 V. This property can be set.

aux_out_3

A floating point property that controls the output of Aux output 3 in Volts, taking values between -10.5 V and +10.5 V. This property can be set.

aux_out_4

A floating point property that controls the output of Aux output 4 in Volts, taking values between -10.5 V and +10.5 V. This property can be set.

channel1

A string property that represents the type of Channel 1, taking the values X, R, X Noise, Aux In 1, or Aux In 2. This property can be set.

channel2

A string property that represents the type of Channel 2, taking the values Y, Theta, Y Noise, Aux In 3, or Aux In 4. This property can be set.

dac1

A floating point property that controls the output of Aux output 1 in Volts, taking values between -10.5 V and +10.5 V. This property can be set.

dac2

A floating point property that controls the output of Aux output 2 in Volts, taking values between -10.5 V and +10.5 V. This property can be set.

dac3

A floating point property that controls the output of Aux output 3 in Volts, taking values between -10.5 V and +10.5 V. This property can be set.

dac4

A floating point property that controls the output of Aux output 4 in Volts, taking values between -10.5 V and +10.5 V. This property can be set.

filter_slope

An integer property that controls the filter slope, which can take on the values 6, 12, 18, and 24 dB/octave. Values are truncated to the next highest level if they are not exact.

frequency

A floating point property that represents the lock-in frequency in Hz. This property can be set.

get_buffer(channel=1, start=0, end=None)

Aquires the 32 bit floating point data through binary transfer

get_scaling(channel)

Returns the offset precent and the exapnsion term that are used to scale the channel in question

harmonic

An integer property that controls the harmonic that is measured. Allowed values are 1 to 19999. Can be set.

input_config

An string property that controls the input configuration. Allowed values are: [‘A’, ‘A - B’, ‘I (1 MOhm)’, ‘I (100 MOhm)’]

input_coupling

An string property that controls the input coupling. Allowed values are: [‘AC’, ‘DC’]

input_grounding

An string property that controls the input shield grounding. Allowed values are: [‘Float’, ‘Ground’]

input_notch_config

An string property that controls the input line notch filter status. Allowed values are: [‘None’, ‘Line’, ‘2 x Line’, ‘Both’]

is_out_of_range()

Returns True if the magnitude is out of range

magnitude

Reads the magnitude in Volts.

output_conversion(channel)

Returns a function that can be used to determine the signal from the channel output (X, Y, or R)

phase

A floating point property that represents the lock-in phase in degrees. This property can be set.

quick_range()

While the magnitude is out of range, increase the sensitivity by one setting

reference_source

An string property that controls the reference source. Allowed values are: [‘External’, ‘Internal’]

sample_frequency

Gets the sample frequency in Hz

sensitivity

A floating point property that controls the sensitivity in Volts, which can take discrete values from 2 nV to 1 V. Values are truncated to the next highest level if they are not exact.

set_scaling(channel, precent, expand=0)

Sets the offset of a channel (X=1, Y=2, R=3) to a certain precent (-105% to 105%) of the signal, with an optional expansion term (0, 10=1, 100=2)

sine_voltage

A floating point property that represents the reference sine-wave voltage in Volts. This property can be set.

theta

Reads the theta value in degrees.

time_constant

A floating point property that controls the time constant in seconds, which can take discrete values from 10 microseconds to 30,000 seconds. Values are truncated to the next highest level if they are not exact.

wait_for_buffer(count, has_aborted=<function SR830.<lambda>>, timeout=60, timestep=0.01)

Wait for the buffer to fill a certain count

x

Reads the X value in Volts.

y

Reads the Y value in Volts.