Connecting to M2j by Qutech in Python

Instrument Card

The M2j module is a low noise amplifier initially designed for use in reflectometry. It has been optimised for use with the F1d IQ Demodulator with a 40 MHz to 1.5 GHz frequency range. This is reflected in the gain flatness of M2j: within 3dB from 40 MHz to 1.4 GHz.

Device Specification: here

Manufacturer card: QUTECH

At QuTech, we work on a radically new technology with world-changing potential. Our mission: to develop scalable prototypes of a quantum computer and an inherently safe quantum internet, based on the fundamental laws of quantum mechanics.

• Headquarters: CJ Delft, Netherlands
• Yearly Revenue (millions, USD): 41.3
• Vendor Website: here

Connect to the M2j in Python

Read our guide for turning Python scripts into Flojoy nodes.

Flojoy

PROTOCOLS > SCPI

📄 IDN

Query a device's identity through the universal *IDN? SCPI command.

📄 MEASURE VOLTAGE

Query an instrument's measured output voltage, such as a DMM or power supply.

📄 SCPI WRITE

Write a SCPI command to a connected bench-top instrument and return the result.

QCodes Community

To connect to an M2j Lockin Amplifier using Qcodes Community, you can use the following Python script:

from qcodes.instrument.base import Instrument
from qcodes.utils.validators import Numbers
import numpy as np

try:
    from spirack import M2j_module, SPI_rack
except ImportError:
    raise ImportError(('The M2j_module class could not be found. '
                       'Try installing it using pip install spirack'))


class M2j(Instrument):
    # The code for the M2j class is provided in the question


# Create an instance of the SPI_rack class
spi_rack = SPI_rack()

# Connect to the M2j Lockin Amplifier
m2j = M2j('m2j', spi_rack, module=1)

# Set the gain of the amplifier
m2j.gain(50)

# Get the RF level after amplification
rf_level = m2j.RF_level()
print(f"RF level: {rf_level} dBm")

# Clear RF clip
m2j.clear_rf_clip()

# Check if RF is clipped
is_rf_clipped = m2j.is_rf_clipped()
print(f"RF clipped: {is_rf_clipped}")

This script creates an instance of the SPI_rack class and then connects to the M2j Lockin Amplifier using the M2j class. It sets the gain of the amplifier to 50 dB, measures the RF level after amplification, clears the RF clip, and checks if the RF is clipped.