BANDWIDTH_FSV

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The BANDWIDTH_FSV block sets the bandwidths for the signal analyzer. If the bandwidths are set to 0, the bandwidths will be automatic. Requires a CONNECTION_FSV node at the start of the app to connect with the instrument. The VISA address will then be listed under 'connection'. This node should also work with compatible R&S network analyzers. Params: connection : VisaConnection The VISA address (requires the CONNECTION_FSV node). resolution_bandwidth : float Resolution bandwidth, in Hz. Set to automatic if equal to 0. video_bandwidth : float Video bandwidth, in Hz. Set to automatic if equal to 0. Returns: out : String Sweep settings summary.

Python Code

from flojoy import flojoy, DataContainer, String, VisaConnection
from typing import Optional


@flojoy(inject_connection=True)
def BANDWIDTH_FSV(
    connection: VisaConnection,
    resolution_bandwidth: float = 0,
    video_bandwidth: float = 0,
    default: Optional[DataContainer] = None,
) -> String:
    """The BANDWIDTH_FSV block sets the bandwidths for the signal analyzer.

    If the bandwidths are set to 0, the bandwidths will be automatic.

    Requires a CONNECTION_FSV node at the start of the app to connect with
    the instrument. The VISA address will then be listed under 'connection'.

    This node should also work with compatible R&S network analyzers.

    Parameters
    ----------
    connection: VisaConnection
        The VISA address (requires the CONNECTION_FSV node).
    resolution_bandwidth: float
        Resolution bandwidth, in Hz. Set to automatic if equal to 0.
    video_bandwidth: float
        Video bandwidth, in Hz. Set to automatic if equal to 0.

    Returns
    -------
    String
        Sweep settings summary.
    """

    rohde = connection.get_handle()

    s = "Bandwidth settings: "

    if resolution_bandwidth == 0:
        rohde.write("BAND:AUTO ON")
        s += "resolution bandwidth: automatic"
    else:
        rohde.write(f"BAND {resolution_bandwidth}")
        s += f"resolution bandwidth: {resolution_bandwidth}"

    if video_bandwidth == 0:
        rohde.write("BAND:VID:AUTO ON")
        s += "video bandwidth: automatic"
    else:
        rohde.write(f"BAND:VID {video_bandwidth}")
        s += f"video bandwidth: {resolution_bandwidth}"

    return String(s=s)

Find this Flojoy Block on GitHub

Videos

Read FM Radio Signals using Flojoy

Example App

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In this example, the Rohde & Schwarz FSV Signal Analyzer is used to view the FM radio range (86-110 MHz).

First 4 FSV nodes were added: CONNECTION_FSV, SWEEP_SETTINGS_FSV, INIT_SWEEP_FSV, and EXTRACT_SWEEP_FSV. A LINE node was also added. The VISA address was set for the 4 instrument nodes. The range of the signal analyzer sweep was set with SWEEP_SETTINGS_FSV (start = 86, stop = 110 MHz).

The nodes were then connected as shown in the image, and the app was run.