Home Community Example Programs Example Code Document

Example Code

cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Search instead for 
Did you mean: 
ASK A QUESTION

NI-RFmx Demod - Application Example (LabVIEW)

by: Member
‎09-29-2014 07:37 AM
Last Edited by: Member Content Cleaner ‎01-31-2025 09:58 AM

Products and Environment

This section reflects the products and operating system used to create the example.

To download NI software, including the products shown below, visit ni.com/downloads.

    Hardware

  • PXI Vector Signal Analyzer

Code and Documents

Attachment

Download All

Description

Overview

This application example performs Demod ( Analog + Digital ) RF measurements using a compatible NI-RFmx device.

 

 

Description

This example provides an interactive demo panel that allows the user to make various RF measurements simply by navigating to the desired measurement tab.

Each measurement tab provides allows the user to interactively configure the measurement settings and obtain the results. The following measurements are supported:

 

Carrier measurements Mean frequency offset (Hz) ASK, FSK, PSK, QAM, MSK
Mean frequency drift (Hz) ASK, FSK, PSK, QAM, MSK
Mean phase offset (degrees) ASK, PSK, QAM
Error vector magnitude Mean RMS EVM (%) ASK, PSK, QAM, MSK
Mean peak EVM (%) ASK, PSK, QAM, MSK
Maximum RMS EVM (%) ASK, PSK, QAM, MSK
Maximum peak EVM (%) ASK, PSK, QAM, MSK
Mean MER (dB) ASK, PSK, QAM, MSK
Mean RMS offset EVM (%) Offset QPSK
Mean peak offset EVM (%) Offset QPSK
Maximum RMS offset EVM (%) Offset QPSK
Maximum peak offset EVM (%) Offset QPSK
Magnitude error Mean magnitude error (%) ASK, FSK, PSK, QAM, MSK
Maximum magnitude error (%) ASK, FSK, PSK, QAM, MSK
Phase error Mean phase error (%) ASK, PSK, QAM, MSK
Maximum phase error (%) ASK, PSK, QAM, MSK
FSK measurements Frequency deviation (Hz) FSK
Mean RMS deviation error (Hz) FSK
Maximum peak deviation error (Hz) FSK
I/Q impairments Mean I/Q origin offset (dB) ASK, PSK, QAM, MSK
Mean I/Q gain imbalance (dB) PSK, QAM, MSK
Mean quadrature skew (degrees) PSK, QAM, MSK
Miscellaneous Mean Rho factor PSK, QAM, MSK
Mean amplitude droop (dB/Symbol) PSK, QAM, MSK

 

Instructions

1. Configure RF hardware settings (HW Resource Name, carrier frequency, refernce level, etc.)

2. Run this VI.

2. Use tabs to select and configure different RF measurements.

3. Use interactive controls at the bottom of the front panel to control acquisition.

 

 

Requirements

Software

LabVIEW 2012 or higher

NI-RFmx Demod 1.0

NI-RFSA 2.9

 

 

Hardware

Any NI Signal Analyzer hardware compatible with NI-RFmx.

 

 

Image

DemodAppEx.jpg

 

 

 

Example code from the Example Code Exchange in the NI Community is licensed with the MIT license.

0 Kudos