Agilent 33220A Arbitrary Waveform Generator

class pymeasure.instruments.agilent.Agilent33220A(adapter, **kwargs)

Bases: pymeasure.instruments.instrument.Instrument

Represents the Agilent 33220A Arbitrary Waveform Generator.

# Default channel for the Agilent 33220A
wfg = Agilent33220A("GPIB::10")

wfg.shape = "SINUSOID"          # Sets a sine waveform
wfg.frequency = 4.7e3           # Sets the frequency to 4.7 kHz
wfg.amplitude = 1               # Set amplitude of 1 V
wfg.offset = 0                  # Set the amplitude to 0 V

wfg.burst = True                # Enable burst mode
wfg.burst_ncycles = 10e3        # A burst will consist of 10 cycles
wfg.burst_mode = "TRIGGERED"    # A burst will be applied on a trigger
wfg.trigger_source = "BUS"      # A burst will be triggered on TRG*

wfg.output = True               # Enable output of waveform generator
wfg.trigger()                   # Trigger a burst
wfg.wait_for_trigger()          # Wait until the triggering is finished
wfg.beep()                      # "beep"

wfg.check_errors()              # Get the error queue
amplitude

A floating point property that controls the voltage amplitude of the output waveform in V, from 10e-3 V to 10 V. Can be set.

amplitude_unit

A string property that controls the units of the amplitude. Valid values are Vpp (default), Vrms, and dBm. Can be set.

beep()

Causes a system beep.

beeper_state

A boolean property that controls the state of the beeper. Can be set.

burst_mode

A string property that controls the burst mode. Valid values are: TRIG<GERED>, GAT<ED>. This setting can be set.

burst_ncycles

An integer property that sets the number of cycles to be output when a burst is triggered. Valid values are 1 to 50000. This can be set.

burst_state

A boolean property that controls whether the burst mode is on (True) or off (False). Can be set.

check_errors()

Read all errors from the instrument.

frequency

A floating point property that controls the frequency of the output waveform in Hz, from 1e-6 (1 uHz) to 20e+6 (20 MHz), depending on the specified function. Can be set.

offset

A floating point property that controls the voltage offset of the output waveform in V, from 0 V to 4.995 V, depending on the set voltage amplitude (maximum offset = (10 - voltage) / 2). Can be set.

output

A boolean property that turns on (True) or off (False) the output of the function generator. Can be set.

pulse_dutycycle

A floating point property that controls the duty cycle of a pulse waveform function in percent. Can be set.

pulse_hold

A string property that controls if either the pulse width or the duty cycle is retained when changing the period or frequency of the waveform. Can be set to: WIDT<H> or DCYC<LE>.

pulse_period

A floating point property that controls the period of a pulse waveform function in seconds, ranging from 200 ns to 2000 s. Can be set and overwrites the frequency for all waveforms. If the period is shorter than the pulse width + the edge time, the edge time and pulse width will be adjusted accordingly.

pulse_transition

A floating point property that controls the the edge time in seconds for both the rising and falling edges. It is defined as the time between 0.1 and 0.9 of the threshold. Valid values are between 5 ns to 100 ns. Can be set.

pulse_width

A floating point property that controls the width of a pulse waveform function in seconds, ranging from 20 ns to 2000 s, within a set of restrictions depending on the period. Can be set.

ramp_symmetry

A floating point property that controls the symmetry percentage for the ramp waveform. Can be set.

remote_local_state

A string property that controls the remote/local state of the function generator. Valid values are: LOC<AL>, REM<OTE>, RWL<OCK>. This setting can only be set.

shape

A string property that controls the output waveform. Can be set to: SIN<USOID>, SQU<ARE>, RAMP, PULS<E>, NOIS<E>, DC, USER.

square_dutycycle

A floating point property that controls the duty cycle of a square waveform function in percent. Can be set.

trigger()

Send a trigger signal to the function generator.

trigger_source

A string property that controls the trigger source. Valid values are: IMM<EDIATE> (internal), EXT<ERNAL> (rear input), BUS (via trigger command). This setting can be set.

trigger_state

A boolean property that controls whether the output is triggered (True) or not (False). Can be set.

voltage_high

A floating point property that controls the upper voltage of the output waveform in V, from -4.990 V to 5 V (must be higher than low voltage). Can be set.

voltage_low

A floating point property that controls the lower voltage of the output waveform in V, from -5 V to 4.990 V (must be lower than high voltage). Can be set.

wait_for_trigger(timeout=3600, should_stop=<function Agilent33220A.<lambda>>)

Wait until the triggering has finished or timeout is reached.

Parameters:
  • timeout – The maximum time the waiting is allowed to take. If timeout is exceeded, a TimeoutError is raised. If timeout is set to zero, no timeout will be used.
  • should_stop – Optional function (returning a bool) to allow the waiting to be stopped before its end.