Spectran

A simple spectrum analyzer. Read a voltage signal and perform a spectral analysis.

Usage

Installation and Execution

Install via

pip install spectran

Run via

import spectran
spectran.run()

or in terminal

python -m spectran

Workflow

1. First, select driver and device and click connect. This connects the device.
2. Then, select all other options like sample_rate, input_channel, etc.
3. Finally, start the measurement by clicking on Start Measurement.

API Connection

It is possible to remotely control most of Spectran's features via an API. API key can be set with the environment variable API_KEY. Default host is 127.0.0.1 on port 8111. (host should be 0.0.0.0 to access from other network devices) You can check your connection by typing in a browser

http://<host>:<port>

A detailed example can be found in this example.

First, the connection to the API has to be set up (you might have to input your api key):

api = API_Connection()

Afterwards one can set up devices and measurements:

api.connect_device("DummyDAQ", 'Dev1')

CONFIG = {
    "input_channel": "ai0",
    "sample_rate": 50_000 * ureg.Hz,
    "duration": 0.05 * ureg.second,
    "averages": 4,
    "signal_range_min": -3 * ureg.volt, 
    "signal_range_max":  3 * ureg.volt,
    "unit": "Volt",
}
api.set_config(CONFIG)    

# start the measurement
api.start_measurement()
# this waits for the measurement to finish
api.wait_for_measurement()
# this saves the data to a file
api.save_file(f"data.txt")

Development

Install module into environment

pip install -e .[dev]

Extensibility

Spectran is written to provide extensive possibilities for extension. Just extend the spectran.daq.DAQ class for a new driver and implement all necessary functions.

Then add this class to list of drivers in spectran.daq.__init__