Marker Settings (Input IO)

 

The input I/O block provides for three markers. These markers are generated dynamically based on the input signal or by a periodic function. The marker samples are generated at 200 MSa/sec for the signal generator. The three markers which are available at each sample point on the input signal. The setup for these markers are labeled Marker 1 Setup, Marker 3 Setup, and Marker 4 Setup. Marker 2 is reserved for internal use by the PXB.

Note  

For a DSIM (N5102A Digital Signal Interface Module) at the output of the PXB, Marker 1 from the PXB will map into Marker 1 of the DSIM, however, Marker 3 from the PXB will map into Marker 2 of the DSIM.

Marker 1 Setup

Enabled

Choices: Off, On
Default Value: Off

Turns on the individual marker. When Enabled is set to On, additional marker settings that are used for the marker setup are also displayed. When Enabled is set to Off, zero is the output.

 

Delay

Range: 0 s to 5.12 µs (Time required to play 1,024 samples at input sample rate of 200 MSa/s)
Default Value: 0 s
Resolution: 5 ns
Dependency: Displayed only when Enabled is set to On

Sets the amount of time that the marker is delayed. Once the waveform has started playing, the marker will play after the delay period has been achieved. The maximum delay is the time required to play 1,024 samples, which may be calculated by the equation:

 

Polarity

Choices: Positive, Negative
Default Value: Positive
Dependency: Displayed only when Enabled is set to On

Sets the marker output state when the marker source is turned on and off.  

Positive
This choice sets the marker output signal to be High (1), when the marker points from the marker source are On. When the marker points from the source are Off, the marker output signal is set to Low (0).

Negative
This choice sets the marker output signal to be Low (0), when the marker points from the marker source are On. When the marker points from the source are Off, the marker output signal is set to High (1). 

 

Type

Choices: Periodic, Range Detect, Zero Detect
Default Value: Periodic
Dependency: Displayed only when Source is set to Dynamic

Allows you to dynamically control the events that will turn the marker on and off.

Periodic
This choice sets the marker signal to be on and off at intervals defined by the Pulse Start (the number of samples to wait until the first marker pulse is started), Pulse Width (the number of samples that the marker pulse is turned on), and Pulse Period (the number of samples for one complete cycle of the marker pulse, which is number of samples of the pulse period plus the number of samples of off time between two pulses) settings. ClosedExamples…

This illustration provides three examples using the same waveform.
 

Range Detect
This choice identifies the marker signal to be on and off when the waveform signal meets a specific criteria that you define. The criteria is defined by a variety of the settings listed below Type when Range Detect is selected. The Range Detect choice has an additional selection, Range Limit Relationship, which determines which of four additional range setting styles is used. The Range Limit Relationship choices are Equal, Less, Greater, and Range.

Zero Detect
This choice identifies the marker signal to be on while the waveform signal value equals zero and off at other times. While the waveform signal is at the zero value, the marker is turned on until the signal is no longer at zero. ClosedExample…

Note that this must really be zero. A marker is not generated for a zero crossing. For example, if sample A1 = 0.001 and sample A2 = 0.001, the output signal goes through zero but a marker is not generated because the digital data was never equal to zero.–

 

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Pulse Start

Range: 1 to 1099511627775 (240-1) Samples
Default Value: 1 Sample
Resolution: 1 Sample
Dependency: Displayed only when Type is set to Periodic

Sets the waveform sample number to turn on the first marker pulse. When this waveform sample point is played, the first marker pulse is turned on.

 

Pulse Width

Range: 1 to 4294967295 (232-1) Samples
Default Value: 1 Sample
Resolution: 1 Sample
Dependency: Displayed only when Type is set to Periodic

Sets the number of waveform samples as the width of the marker pulse. The pulse width is the number of samples that the marker pulse is turned on. If a valid integer is not entered, the entry is rounded up to the next valid integer. 

 

Pulse Period

Range: 4 to 1099511627775 (240-1) Samples
Default Value: 4 Samples
Resolution: 1 Sample
Dependency: Displayed only when Type is set to Periodic

Sets the number of waveform samples used as the period for one marker cycle. This is the number of waveform samples of one complete pulse cycle, both the on and off periods. The pulse period may be set as an integer, greater than or equal to 4, representing the number of samples. If a valid integer is not entered, the entry is rounded up to the next valid integer. 

 

Range Limit Relationship

Choices: Equal, Less, Greater, Range
Default Value: Equal
Dependency: Displayed only when Type is set to Range Detect

Sets the relationship for the range limits that the range detection process uses to compare the waveform sample against when determining the marker state.

Equal
This choice sets the range detection process to turn the marker on when the waveform sample value is equal to the value that you specify with the Range Data and the Equal To parameters. ClosedExample…

Note that this must really be the "Equal To" value. A marker is not generated when the signal crosses through the "Equal To" value. For example, if the "Equal To" value is 0.050V, and sample A1 = 0.049 and sample A2 = 0.051, the output signal goes through the "Equal To" value but a marker is not generated because the digital data was never equal to the "Equal To" value.

Less
This choice sets the range detection process to turn the marker on when the waveform sample value is less than the value that you specify with the Range Data and the Less Than parameters. ClosedExample…

Greater
This choice sets the range detection process to turn the marker on when the waveform sample value is greater than the value that you specify with the Range Data and the Greater Than parameters. ClosedExample…

Range
This choice sets the range detection process to turn the marker on when the waveform sample value is within the values that you specify with the Range Data, Upper Limit, and Lower Limit parameters. ClosedExample…

 

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Range Data

Choices: I, Q, Power
Default Value: I
Dependency: Displayed only when Marker Type is set to Range Detect

Sets the type of data that the range detection process uses to compare the waveform sample against when determining the marker state. The maximum and minimum values change depending on this selection. ClosedExample…

This example shows the maximum and minimum allowable waveform values for the Range Data selection based on the Units that are selected.

I
This choice sets the range detection process to use the voltage of the I portion of the waveform sample value when determining the marker state.

Q
This choice sets the range detection process to use the voltage of the Q portion of the waveform sample value when determining the marker state.  

Power
This choice sets the range detection process to use the power of the waveform sample value when determining the marker state.  

 

Units

Choices: Integer, dB, %
Default Value: Integer
Dependency: Displayed only when Type is set to Range Detect

Sets the units of the waveform sample for which the range detection process checks when determining the marker state. The Unit values change depending on the Range Data selection.

Integer
This choice sets the range detection process to compare the DAC integer value of the waveform sample when determining the state of the marker.

dB
This choice sets the range detection process to compare the measured power of the waveform sample when determining the state of the marker.

%
This choice sets the range detection process to compare the percentage between the minimum and maximum values of the waveform sample when determining the state of the marker.

 

Equal To

Range:
when Units is set to Integer and Range Data is set to I or Q: –32768 to 32767
when Units is set to Integer and Range Data is set to Power: –0 to 46340
when Units is set to dB and Range Data is set to I or Q: –Infinity (–96.3) to 0 dB
when Units is set to dB and Range Data is set to Power: –Infinity (–43.6) to 3 dB
when Units is set to % and Range Data is set to I or Q: 0 to 100 %
when Units is set to % and Range Data is set to Power: 0 to 100 %
Default Value:
when Range Data is set to I or Q: 32767 Integer, 0.0 dB, 100 %
when Range Data is set to Power: 32767 Integer, 1.5 dB, 70.7 %
Resolution: 1 Integer, 0.1 dB, 0.1 %
Dependency: Displayed only when Range Limit Relationship is set to Equal 

Sets the limit value of the dynamic marker when the Range Limit Relationship is set to Equal. The marker is turned on while the waveform value is at the Equal To value.

 

Less Than

Range:
when Units is set to Integer and Range Data is set to I or Q: –32768 to 32767
when Units is set to Integer and Range Data is set to Power: 0 to 46340
when Units is set to dB and Range Data is set to I or Q: –Infinity (–96.3) to 0 dB
when Units is set to dB and Range Data is set to Power: –Infinity (–43.6) to 3 dB
when Units is set to % and Range Data is set to I or Q: 0 to 100 %
when Units is set to % and Range Data is set to Power: 0 to 100 %
Default Value:
when Range Data is set to I or Q: 32767 Integer, 0.0 dB, 100 %
when Range Data is set to Power: 32767 Integer, 1.5 dB, 70.7 %
Resolution: 1 Integer, 0.1 dB, 0.1 %
Dependency: Displayed only when Range Limit Relationship is set to Less 

Sets the limit value of the dynamic marker when the Range Limit Relationship is set to Less. The marker is turned on whenever the waveform value decreases below the Less Than value.

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Greater Than

Range:
when Units is set to Integer and Range Data is set to I or Q: 32768 to 32767
when Units is set to Integer and Range Data is set to Power: 0 to 46340
when Units is set to dB and Range Data is set to I or Q: Infinity (96.3) to 0 dB
when Units is set to dB and Range Data is set to Power: Infinity (43.6) to 3 dB
when Units is set to % and Range Data is set to I or Q: 0 to 100 %
when Units is set to % and Range Data is set to Power: 0 to 100 %
Default Value:
when Range Data is set to I or Q: 32767 Integer, 0.0 dB, 100 %
when Range Data is set to Power: 32767 Integer, 1.5 dB, 70.7 %
Resolution: 1 Integer, 0.1 dB, 0.1 %
Dependency: Displayed only when Range Limit Relationship is set to Greater   –– ––  – 

Sets the limit value of the dynamic marker when the Range Limit Relationship is set to Greater. The marker is turned on whenever the waveform value increases above the Greater Than value.

 

Upper Limit

Range:
when Units is set to Integer and Range Data is set to I or Q: –32768 to 32767
when Units is set to Integer and Range Data is set to Power: 0 to 46340
when Units is set to dB and Range Data is set to I or Q: –Infinity (–96.3) to 0 dB
when Units is set to dB and Range Data is set to Power: –Infinity (–43.6) to 3 dB
when Units is set to % and Range Data is set to I or Q: 0 to 100 %
when Units is set to % and Range Data is set to Power: 0 to 100 %
Default Value:
when Range Data is set to I or Q: 32767 Integer, 0.0 dB, 100 %
when Range Data is set to Power: 32767 Integer, 1.5 dB, 70.7 %
Resolution: 1 Integer, 0.1 dB, 0.1 %
Dependency: Displayed only when Range Limit Relationship is set to Range 

Sets the value of the upper range limit of the dynamic marker when the Range Limit Relationship is set to Range. The marker is on whenever the waveform value is less than the Upper Limit value and greater than the Lower Limit value.

 

Lower Limit

Range:
when Units is set to Integer and Range Data is set to I or Q: –32768 to 32767
when Units is set to Integer and Range Data is set to Power: 0 to 46340
when Units is set to dB and Range Data is set to I or Q: –Infinity (–96.3) to 0 dB
when Units is set to dB and Range Data is set to Power: –Infinity (–43.6) to 3 dB
when Units is set to % and Range Data is set to I or Q: 0 to 100 %
when Units is set to % and Range Data is set to Power: 0 to 100 %
Default Value:
when Range Data is set to I or Q: 32768 Integer, –Infinity (–96.3) dB, 0 %
when Range Data is set to Power: 0 Integer, –Infinity (–43.6) dB, 0 %
Resolution: 1 Integer, 0.1 dB, 0.1 %
Dependency: Displayed only when Range Limit Relationship is set to Range

Sets the value of the lower range limit of the dynamic marker when the Range Limit Relationship is set to Range. The marker is on whenever the waveform value is less than the Upper Limit value and greater than the Lower Limit value.

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Related Topics

General Settings
Power Calibration Settings
Power Calibration Graphics