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ARB

 

Settings

Waveform Source Name

Selects the waveform file to be used for playback on the selected baseband generator channel. If an Agilent Signal Studio waveform is selected, its header information is also extracted from the file and used for several parameters, such as Sample Rate, Runtime Scaling, and Baseband Frequency Offset.

The PXB defaults to the waveform file default1.bin in the folder: C:\<Program Files for Win XP><Program Files (x86) for Win 7>\Agilent\PXB\FactoryDefaultWaveforms

This folder contains several waveform files that are saved in the PXB. Each of these waveform files is described in Factory Default Waveform Files.

You can choose from any of the factory default waveform files or you can navigate to a waveform file that you have previously saved in the PXB using the Open File dialog box.

 

Numeric Format

Choices: Two's Complement, Offset Binary
Default Value: Two's Complement
Dependency: Displayed only when Waveform Source Name is not selecting an Agilent Signal Studio waveform

Displays and sets the binary format for the selected waveform file. When a waveform file is played, the waveform data is read from the file and scaled to 16 bits of resolution so that:

+1 = 32767
0 = 0
1 = 32767     

The binary file contains 16-bit data stored in Big Endian format, alternating the I and Q data as shown.

I1 Q1 I2 Q2 I3 Q3 ... I14 Q14   I15 Q15   I16 Q16           

Twos Complement
Sets the numeric format to a Closedtwo’s complement representation of the waveform file's data values.

Twos complement is a method for representing data as a signed number. Using two's complement:

Integer

Twos Complement Representation

32767

0111 1111 11111111   

16384

0100 0000 00000000   

1

0000 00000000 0001   

0

0000 000000000000   

1

1111 111111111111   

16384

1100 0000 00000000   

32768

1000 0000 00000000   

Offset Binary
Sets the numeric format to an Closedoffset binary representation of the waveform file's data values.

Offset binary is a method for representing data as a signed number. Using binary code, half of the largest possible number is assigned as the zero value. A positive integer is the absolute value added to the zero number and a negative integer is subtracted. Offset binary is popular in A/D and D/A conversions.

Integer

Offset Binary
Representation

32767

1111 111111111111   

16384

1100 0000 00000000   

1

1000 0000 0000 0001   

0

1000 0000 00000000   

1

0111 1111 11111111   

16384

0100 0000 00000000   

32768

0000 000000000000   

 

Number of Samples

Range: 256 to 9.223 X 1018 samples
Default Value: 5000 samples

Displays the number of samples in the selected waveform file. This parameter is read-only.

 

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Loop Count

Range: 0 to 2,147,483,647 (231 – 1) Samples
Default Value: 0 (continuous play)

Displays the number of times the selected waveform file is played. If this parameter is set to 0 (zero), the waveform file is played continuously.

 

Last Sample State

Choices: Hold Last Value, Zero
Default Value: Hold Last Value

Sets the value of the state that the output is set at when the waveform file stops playing.

Hold Last Value
Holds the last I and Q sample value (including the markers) on the output until the next waveform is played.

Zero
Sets the output value to zero when the waveform has completed playing.

 

Endianess

Choices: N5106A Native Format, N5110B Format
Default Value: N5106A Native Format

Selects the bit order for the waveform file.

N5106A Native Format
Plays the waveform file reading the bytes in sequential order (Big Endian). This is the native N5106A PXB format. Little Endian and Big Endian (Byte Order) for more information.

N5110B Format
plays the waveform file Closedswapping every other byte position (Little Endian). This is the format used with Agilent N5110B Baseband Studio systems. Little Endian and Big Endian (Byte Order) for more information.

 

 

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