Agilent Technologies E8247C PSG CW, E8267C PSG, E8257C PSG manual Working with Burst Shapes

Custom Real Time I/Q Baseband

Working with Burst Shapes

Working with Burst Shapes

•“Configuring the Burst Rise and Fall Parameters” on page 154

•“Using User-Defined Burst Shape Curves” on page 155

The Burst Shape menu enables you to modify the rise and fall time, rise and fall delay, and the burst shape (either sine or user file defined). In addition, you can define the shape of the burst and preview the burst shape through a Rise Shape Editor, or restore all of the burst shape parameters back to their original default state.

Rise time	the period of time, specified in bits, where the burst increases from a minimum of
	−70 dB (0) to full power (1).
Fall time	the period of time, specified in bits, where the burst decreases from full power (1) to a
	minimum of −70 dB (0).
Rise delay	the period of time, specified in bits, that the start of the burst rise is delayed. Rise delay
	can be either negative or positive. Entering a delay other than zero shifts the full power
	point earlier or later than the beginning of the first useful symbol.
Fall delay	the period of time, specified in bits, that the start of the burst fall is delayed. Fall delay
	can be either negative or positive. Entering a delay other than zero shifts the full power
	point earlier or later than the end of the last useful symbol.

User-defined

burst shape up to 256 user-entered values, which define the shape of the curve in the specified rise or fall time. The values can vary between 0 (no power) and 1 (full power) and are scaled linearly. Once specified, the values are resampled as necessary to create the cubic spline that passes through all of the sample points.

The default burst shape of each format is implemented according to the standards of the format selected. You can, however, modify the following aspects of the burst shape:

User-Defined

ValuesUser-Defined

Values

	1
Power	Rise	Rise	Fall	Fall
	Delay	Time	Delay	Time
	0
	Time

Chapter 7 153