NI-RFmx Demod - Application Example (LabVIEW)

[DharmendraLingaiah]

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.

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