getRadioTime

Get current USRP radio time

Since R2023b

Add-On Required: This feature requires the Wireless Testbench™ Support Package for NI™ USRP™ Radios add-on.

Syntax

time = getRadioTime(radio)

Description

time = getRadioTime(radio) returns the current USRP™ radio time time associated with the radio System object™ radio.

Examples

Get USRP Radio Time

Create an SDRu receiver System object. Set the pulse per second (PPS) signal source to be the PPS signal from a GPSDO.

rx = comm.SDRuReceiver( ...
    Platform="N320/N321", ...
    IPAddress="192.168.20.2", ...
    PPSSource="GPSDO", ...
    ClockSource="GPSDO", ...
    EnforceGPSTimeSync=true, ...
    SamplesPerFrame=20000);

Get the current USRP radio time.

GPSLockStatus = 0;
    while ~GPSLockStatus 
        disp("Trying to lock to GPS constellation ...");
        GPSLockStatus =  gpsLockedStatus(rx);
    end  

Trying to lock to GPS constellation ...

disp("GPS Locked");

GPS Locked

rx_data = rx();

USRP time synchronized to GPS time

radTime = getRadioTime(rx);
d = datetime(radTime, ...
    ConvertFrom='posixtime', ...
    Format='MM/dd/uuuu HH:mm:ss', ...
    TimeZone='Europe/London');
fprintf('The current USRP radio time is %s',d)

The current USRP radio time is 07/27/2023 16:29:31

release(rx); 

Input Arguments

radio — USRP radio

comm.SDRuTransmitter System object | comm.SDRuReceiver System object

USRP radio, specified as a comm.SDRuTransmitter or comm.SDRuReceiver System object. The associated radio must be connected to the host computer.

Output Arguments

time — Current radio time in seconds

positive numeric scalar

The current radio time in seconds, returned as a positive numeric scalar.

Data Types: double

Version History

Introduced in R2023b

R2025a: Support for USRP E320 and X410 radios

You can now use the getRadioTime function to get the current USRP E320 or X410 radio time associated with the radio System object specified by the radio input argument.

R2024a: Support for N3xx and X3xx series radio devices moved to Wireless Testbench

Support for NI™ USRP N3xx and X3xx series radio devices has moved from Communications Toolbox™ Support Package for USRP Radio to Wireless Testbench™ Support Package for NI USRP Radios.