SWEEP_SETTINGS_FSV
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Set sweep settings for a FSV. Note that span/center and start/stop can be used equivalently if:
start = center - (span / 2) and stop = center + (span / 2).
Requires a CONNECTION_FSV block at the start of the app to connect with
the instrument. The VISA address will then be listed under 'connection'.
This block should also work with compatible R&S network analyzers. Params: connection : VisaConnection The VISA address (requires the CONNECTION_FSV block). span_or_range : select X axis range, span (center and span) or range (start and stop). center : float The center of the x axis range, in Hz. span : float The span of the x axis, in Hz. start : float The start point of the x axis, in Hz. stop : float The end point of the x axis, in Hz. sweep_type : select How the FSV sweeps along the x axis range. sweep_type : float The sweep time (set to auto if = 0), in seconds. counts : int Number of sweeps to do, (average optional in INIT_SWEEP_FSV). points : int Number of x axis points to sweep. Returns: out : String Sweep settings summary.
Python Code
from flojoy import flojoy, DataContainer, String, VisaConnection
from typing import Optional, Literal
@flojoy(inject_connection=True)
def SWEEP_SETTINGS_FSV(
connection: VisaConnection,
span_or_range: Literal["span", "range"] = "range",
center: float = 1e8,
span: float = 1e7,
start: float = 1e7,
stop: float = 1e8,
sweep_type: Literal["sweep", "FFT", "auto"] = "auto",
sweep_time: float = 0,
counts: int = 10,
points: int = 1000,
default: Optional[DataContainer] = None,
) -> String:
"""Set sweep settings for a FSV.
Note that span/center and start/stop can be used equivalently if:
start = center - (span / 2) and stop = center + (span / 2).
Requires a CONNECTION_FSV block at the start of the app to connect with
the instrument. The VISA address will then be listed under 'connection'.
This block should also work with compatible R&S network analyzers.
Parameters
----------
connection: VisaConnection
The VISA address (requires the CONNECTION_FSV block).
span_or_range: select
X axis range, span (center and span) or range (start and stop).
center: float
The center of the x axis range, in Hz.
span: float
The span of the x axis, in Hz.
start: float
The start point of the x axis, in Hz.
stop: float
The end point of the x axis, in Hz.
sweep_type: select
How the FSV sweeps along the x axis range.
sweep_type: float
The sweep time (set to auto if = 0), in seconds.
counts: int
Number of sweeps to do, (average optional in INIT_SWEEP_FSV).
points: int
Number of x axis points to sweep.
Returns
-------
String
Sweep settings summary.
"""
rohde = connection.get_handle()
s = "Sweep settings: "
if span_or_range == "span":
rohde.write(f"FREQ:CENT {center}")
rohde.write(f"FREQ:SPAN {span}")
s += f"Center: {center} Hz; Span: {span} Hz: "
elif span_or_range == "range":
rohde.write(f"FREQ:STAR {start}")
rohde.write(f"FREQ:STOP {stop}")
s += f"Start: {start} Hz; Stop: {stop} Hz: "
s += f"Sweep: {sweep_type}: "
if sweep_type == "sweep":
sweep_type = "SWE"
rohde.write(f"SWE:TYPE {sweep_type.upper()}")
if sweep_time == 0:
rohde.write("SWE:TIME:AUTO ON")
else:
rohde.write(f"SWE:TIME {sweep_time}")
rohde.write(f"SWE:COUN {counts}")
rohde.write(f"SWE:POIN {points}")
s += f"Counts: {counts}; Points: {points}"
return String(s=s)
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.