VISA Equipment Base Class

VISAEquipment

Base class that represents an instance of a VISA-compliant device

Methods:

Name	Description
__init__	Create an instance of a VISA-compliant device using a given IDN_PATTERN
configure	Override this function to configure your particular device.
find_device	Find all resources attached to the host and select the first one that matches the IDN_PATTERN
query	Write a SCPI command to the device and then read the result
read	Read the device
take_screenshot	Override this function to take a screenshot of the display of your particular device
write	Write a SCPI command to the device

__init__()

Create an instance of a VISA-compliant device using a given IDN_PATTERN to find the related instrument connected to the host. If found, it will then configure it for before the test runs

configure()

Override this function to configure your particular device. Used during initializing the class to get the device into a known state

find_device()

Find all resources attached to the host and select the first one that matches the IDN_PATTERN NOTE: this will select the first found device that matches, multiple of the same device is not supported

Returns:

Type	Description
bool	True when a matching instrument is found and selected, False otherwise

query(SCPI)

Write a SCPI command to the device and then read the result

Parameters:

Name	Type	Description	Default
SCPI	str	must be a valid SCPI command for the given device	required

Returns:

Type	Description
str	The device response as a string

read()

Read the device

Returns:

Type	Description
str	The string read from the instrument

take_screenshot(filename)

Override this function to take a screenshot of the display of your particular device

Parameters:

Name	Type	Description	Default
filename	str	Path of the file the screenshot will be saved at	required

write(SCPI)

Write a SCPI command to the device

Parameters:

Name	Type	Description	Default
SCPI	str	must be a valid SCPI command for the given device	required