:DISPlay:GRAPh:X:SPAN

Command Syntax

:DISPlay:GRAPh:X:SPAN <frequency>

<frequency> is a double.

Query Syntax

:DISPlay:GRAPh:X:SPAN?

Description

For FlexPLL's graph of the Jitter Transfer Function, sets the X-axis frequency span in Hertz (Hz). The default value is 99.9985 MHz. To set the graph's center frequency, use the :DISPlay:GRAPh:X:CENTer command.

When you change any one of the start, stop, center, and span frequencies, FlexPLL will dynamically change the other setting if needed to maintain valid settings. For example, as you decrease the stop frequency, FlexPLL automatically adjusts the center frequency. Changes to these four frequencies affect both the JTF graph limits as well as the stop and start frequency settings in the Acquisition Setup dialog. The following table shows the limits for these settings.

Setting Limits (Dependent on Other Settings)

Setting	Command	Limits
		Minimum	Maximum	Default
Start Frequency	:DISPlay:GRAPh:X:STARt:	1.5 kHz	99.9990 MHz	1.5 kHz
Stop Frequency	:DISPlay:GRAPh:X:STOP:	2.5 kHz	100 MHz	100 MHz
Center Frequency	:DISPlay:GRAPh:X:CENTer:	2.0 kHz	99.9995 MHz	50.00075 MHz
Frequency Span	:DISPlay:GRAPh:X:SPAN:	1 kHz	99.9985 MHz	99.9985 MHz

Example Command Sequence

:DISPlay:GRAPh:X:CENTer 10E6;
:DISPlay:GRAPh:X:SPAN 20E6;
:DISPlay:GRAPh:Y:RANGe 60E6;
:DISPlay:GRAPh:Y:OFFSet 10;