Table Of Contents

NI-USRP Properties

Last Modified: March 21, 2018

Name Description
Active Channel Specifies the channel name used to access all subsequent properties in this instance of the property node.
Start Trigger Type Specifies the type of Start Trigger, which controls how the device generates or acquires signals.
Start Trigger Time (whole seconds) Specifies the whole seconds part of the trigger start time.
Start Trigger Time (fractional seconds) Specifies the fractional seconds part of the trigger start time.
Reference Frequency Source Specifies the source of the signal used as a frequency reference for the local oscillator (LO).
Exported Reference Frequency Output Terminal Specifies the output terminal of the exported reference frequency signal.
Timebase Clock Source Specifies the source of the signal used as the timebase clock if you set the Start Trigger Type property to Time.
Exported Timebase Clock Output Terminal Specifies the output terminal of the exported timebase clock (PPS) signal.
Timebase Clock Polarity Specifies the polarity of the signal used as the timebase clock if you set the Start Trigger Type property to Time.
LO Source Specifies the LO source for the selected channel.
LO Export Enabled Specifies whether or not to export the LO of the selected channel.
LO IF1 Frequency Specifies the frequency, in Hz, of the IF1 LO.
LO IF2 Frequency Specifies the frequency, in Hz, of the IF2 LO.
Coerced LO IF1 Frequency Reads back the frequency, in Hz, of the IF1 LO.
Coerced LO IF2 Frequency Reads back the frequency, in Hz, of the IF2 LO.
Has GPS Disciplined Clock? Returns True if the device has a GPS-disciplined clock.
GPS Time (seconds) Returns the time that the GPS reports.
GPS Lock Status Returns True if the GPS has a satellite fix.
GPS Sentence GGA Returns the GPS fix data.
GPS Sentence RMC Returns the recommended minimum specific GPS and transit data.
Data Clock Rate Specifies the data rate of samples coming from the analog-to-digital converters (ADCs) to the DSP or going to the digital-to-analog converters (DACs) from the DSP.
Enabled Channels Specifies the list of channels enabled for acquisition/generation for this session.
Number of Samples Is Finite Specifies whether the device acquires a finite number of samples or acquires samples continuously.
Number of Samples Specifies the finite number of samples to acquire.
IQ Rate Specifies the sample rate of the baseband I/Q data for transmit (Tx) or receive (Rx) signals in samples per second (S/s).
Carrier Frequency Specifies the carrier frequency, in Hz, of the RF signal.
Bandwidth Specifies the bandwidth, in Hz, of the analog filter used in the RF front-end.
Gain Specifies the gain, in dB, applied to the RF signal for receive (Rx) and transmit (Tx) signals.
Active Antenna Specifies the antenna port to use for this channel.
Number of Channels in Session Returns the number of separate transmit (Tx) or receive (Rx) channels contained in the current driver session.
Host Data Type Specifies the data type to fetch from or write to the driver.
Sample Width Specifies the width, in bits, of the binary data sample transferred across the bus between the host and the device.
Expected Peak Specifies the expected peak signal, as a fraction of the full-scale signal to acquire or generate.
LO Frequency Specifies the local oscillator (LO) frequency, in Hz.
Coerced LO Frequency Reads back the coerced local oscillator (LO) frequency, in Hz.
Warning Policy Specifies whether NI-USRP returns an error, returns a warning, or ignores overflow, underflow, or timeout conditions during data transfer.
Current Driver Version Returns a string that contains the current version information for the NI-USRP driver. For example, NI-USRP can return 1.3.0.
Model Returns a string that contains the model number or name of the device that you are currently using.
Current Firmware Version Returns a string containing the current version of the firmware for the device you are currently using.
Oldest Compatible Firmware Version Returns a string containing the oldest compatible version of the firmware for the device you are currently using.
Current FPGA Version Returns a string containing the current version of the FPGA image for the device you are currently using.
Oldest Compatible FPGA Version Returns a string containing the oldest compatible version of the FPGA image for the device you are currently using.

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