Pulse Modulation Rise/Fall Time

(Option 1E6)

This test verifies that the internal pulse modulator's rise and fall time meets specifications.

Pulse modulation rise/fall time is defined as the amount of time it takes the pulse envelope to transition from the 10% pulse envelope level to the 90% pulse envelope level on both the rising and falling edges of the pulse.

During the test, the signal generator is placed in an internal pulse modulation mode at a certain power level and the rise and fall time of the pulse envelope is measured with a high-frequency, digitizing oscilloscope.

Required Test Equipment

Instrument	Critical Specifications for This Test	Recommended Model¹
High Frequency Oscilloscope Mainframe	6 GHz BW	86100D
Oscilloscope Plug-In	Time Interval Accuracy	86117A
Pulse Generator	Rise and Fall time < 1 ns	81130A
10 dB Attenuator	none	8491B Option 010
20 dB Attenuator	none	8493C Option 020

Refer to the main equipment list for alternate models.

Connections and Setup Procedures

All test equipment requires a 30 minute warm-up period to ensure accurate performance.
In the following test setup, direct cable and adapter connections are designated as solid lines. Changeable cable and adapter connections are designated as dashed lines.
Connect all test equipment as shown.
Connect GPIB cables to all GPIB-controlled test equipment.
While performing this test, follow all instructions on the controller display.

Setup for Pulse Modulation Rise/Fall Time (using plug-in trigger)

Setup for Pulse Modulation Rise/Fall Time (using mainframe trigger)