Agilent 8257D Signal Generator

class pymeasure.instruments.agilent.Agilent8257D(adapter, delay=0.02, **kwargs)

Bases: pymeasure.instruments.instrument.Instrument

Represents the Agilent 8257D Signal Generator and provides a high-level interface for interacting with the instrument.

generator = Agilent8257D("GPIB::1")

generator.power = 0                     # Sets the output power to 0 dBm
generator.frequency = 5                 # Sets the output frequency to 5 GHz
generator.enable()                      # Enables the output
property amplitude_depth

A floating point property that controls the amplitude modulation in precent, which can take values from 0 to 100 %.

property amplitude_source

A string property that controls the source of the amplitude modulation signal, which can take the values: ‘internal’, ‘internal 2’, ‘external’, and ‘external 2’.

property center_frequency

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

config_amplitude_modulation(frequency=1000.0, depth=100.0, shape='sine')

Configures the amplitude modulation of the output signal.

Parameters
  • frequency – A modulation frequency for the internal oscillator

  • depth – A linear depth precentage

  • shape – A string that describes the shape for the internal oscillator

config_low_freq_out(source='internal', amplitude=3)

Configures the low-frequency output signal.

Parameters
  • source – The source for the low-frequency output signal.

  • amplitude – Amplitude of the low-frequency output

config_pulse_modulation(frequency=1000.0, input='square')

Configures the pulse modulation of the output signal.

Parameters
  • frequency – A pulse rate frequency in Hertz

  • input – A string that describes the internal pulse input

config_step_sweep()

Configures a step sweep through frequency

disable()

Disables the output of the signal.

disable_amplitude_modulation()

Disables amplitude modulation of the output signal.

disable_low_freq_out()

Disables low frequency output

disable_modulation()

Disables the signal modulation.

disable_pulse_modulation()

Disables pulse modulation of the output signal.

property dwell_time

A floating point property that represents the settling time in seconds at the current frequency or power setting. This property can be set.

enable()

Enables the output of the signal.

enable_amplitude_modulation()

Enables amplitude modulation of the output signal.

enable_low_freq_out()

Enables low frequency output

enable_pulse_modulation()

Enables pulse modulation of the output signal.

property frequency

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

property has_amplitude_modulation

Reads a boolean value that is True if the amplitude modulation is enabled.

property has_modulation

Reads a boolean value that is True if the modulation is enabled.

property has_pulse_modulation

Reads a boolean value that is True if the pulse modulation is enabled.

property internal_frequency

A floating point property that controls the frequency of the internal oscillator in Hertz, which can take values from 0.5 Hz to 1 MHz.

property internal_shape

A string property that controls the shape of the internal oscillations, which can take the values: ‘sine’, ‘triangle’, ‘square’, ‘ramp’, ‘noise’, ‘dual-sine’, and ‘swept-sine’.

property is_enabled

Reads a boolean value that is True if the output is on.

property low_freq_out_amplitude

A floating point property that controls the peak voltage (amplitude) of the low frequency output in volts, which can take values from 0-3.5V

property low_freq_out_source

A string property which controls the source of the low frequency output, which can take the values ‘internal [2]’ for the inernal source, or ‘function [2]’ for an internal function generator which can be configured.

property power

A floating point property that represents the output power in dBm. This property can be set.

property pulse_frequency

A floating point property that controls the pulse rate frequency in Hertz, which can take values from 0.1 Hz to 10 MHz.

property pulse_input

A string property that controls the internally generated modulation input for the pulse modulation, which can take the values: ‘square’, ‘free-run’, ‘triggered’, ‘doublet’, and ‘gated’.

property pulse_source

A string property that controls the source of the pulse modulation signal, which can take the values: ‘internal’, ‘external’, and ‘scalar’.

shutdown()

Shuts down the instrument by disabling any modulation and the output signal.

property start_frequency

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

property start_power

A floating point property that represents the stop power in dBm. This property can be set.

start_step_sweep()

Starts a step sweep.

property step_points

An integer number of points in a step sweep. This property can be set.

property stop_frequency

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

stop_step_sweep()

Stops a step sweep.