Custom Real Time I/Q Baseband

Working with Burst Shapes

Burst shape maximum rise and fall time values are affected by the following factors:

the symbol rate

the modulation type

When the rise and fall delays equal 0, the burst shape attempts to synchronize the maximum burst shape power to the beginning of the first valid symbol and the ending of the last valid symbol.

If you find that the error vector magnitude (EVM) or adjacent channel power (ACP) increases when you turn bursting on, you can adjust the burst shape to assist with troubleshooting.

Configuring the Burst Rise and Fall Parameters

1.Press Preset.

2.Press Mode > Custom > Real Time I/Q Baseband > Burst Shape.

3.Press Rise Time > 5 > bits.

4.Press Rise Delay > 1 > bits.

5.Press Fall Time > 5 > bits.

6.Press Fall Delay > 1 > bits.

This configures the burst shape for the custom real-time I/Q baseband digital modulation format. For instructions on creating and applying user-defined burst shape curves, see “To Create and Store User-Defined Burst Shape Curves” on page 155.

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Agilent Technologies E8257C PSG, E8267C PSG, E8247C PSG CW manual Configuring the Burst Rise and Fall Parameters

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