SYSTem:FIFO Commands

The 4 GB FIFO data buffer is available with Option S93118A/B or Option S930900A/B on the PNA. (See VNA Configurations and Options.) These commands control data in and out of FIFO data buffer. The FIFO can be emptied as it is being filled, which means that the VNA can be used to acquire an infinite amount of data.

The data placed into the FIFO is the raw data after averaging and ratioing has been applied, but prior to any calibration, formatting, or data analysis functions.

SYSTem:FIFO

DATA

| BYTe?

| COUNt?

| CLEar

| COUNT?

[:STATe]

Click on a red keyword to view the command details.

SYSTem:FIFO:DATA? <dpoints>

Applicable Models: N522xB, N524xB (Read-only) Reads the next specified number of data points from the FIFO buffer. Each data point is returned as a real/imaginary pair. Data is cleared as it is read.
Parameters
<dPoints>	Number of data points to read. An error is returned if the amount of requested data is larger than the available data.
Examples	SYST:FIFO:DATA? 1e6 system:fifo:data? 1e3
Return Type	Use FORMat:DATA to change the data type (<REAL,32>, <REAL,64> or <ASCii,0>). For best results, use REAL,32 Use FORMat:BORDer to change the byte order. Use “NORMal” when transferring a binary block from LabView or Vee. For other programming languages, you may need to "SWAP" the byte order. Each data point is returned as a real/imaginary pair.
Default	Not applicable

SYSTem:FIFO:DATA:BYTe? <X>

Applicable Models: N522xB, N524xB (Read-only) Returns a specific number of bytes to read.
Parameters
<X>	Number of bytes to read.
Examples	SYST:FIFO:DATA:BYTe? 4096 system:fifo:data:byte? 4096
Return Type	IEEE binary block
Default	Not applicable

SYSTem:FIFO:DATA:BYTe:COUNt?

Applicable Models: N522xB, N524xB (Read-only) Returns a specific number of bytes to read.
Parameters
Examples	SYST:FIFO:DATA:BYTe:COUNt? system:fifo:data:byte:count?
Return Type	Integer
Default	Not applicable

SYSTem:FIFO:DATA:CLEar

Applicable Models: N522xB, N524xB (Write-only) Clears the data from the FIFO buffer.
Parameters	None
Examples	SYST:FIFO:DATA:CLE system:fifo:data:clear
Return Type	None
Default	Not applicable

SYSTem:FIFO:DATA:COUNt?

Applicable Models: N522xB, N524xB (Read-only) Returns the total number of data points in the FIFO buffer.
Parameters	None
Examples	SYST:FIFO:DATA:COUN? ' returns 5.07e6
Return Type	Numeric
Default	Not applicable

SYSTem:FIFO[:STATe] <bool>

Applicable Models: N522xB, N524xB (Write-Read) Sets and returns the state of data storage to the FIFO buffer. Syst:Preset or an instrument state recall also ends storage to the FIFO buffer. The FIFO buffer is cleared when set to OFF.
Parameters
<bool>	FIFO buffer state. Choose from: ON or 1 Data is stored in the FIFO buffer. OFF or 0 Data is NOT stored in the FIFO buffer.
Examples	SYST:FIFO 1 system:fifo:state off
Query Syntax	SYSTem:FIFO[:STATE]?
Return Type	Boolean
Default	0 OFF