Internal Pulse Modulation Rise/Fall Time

(E8257D/E8267D Option UNW, UNS, or HNS,
 E8663D Option UNW and E8257N Only)

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

Test Equipment

Recommended Models

Alternate Model(s)

Oscilloscope Mainframe

N1000A

86100D
86100A (with firmware A.03.03 or greater)
86100B/C
54750A (see procedure below)

Oscilloscope Plug-In

N1045B1

N1045A1
N1055A1, 2

83484A
54752A
86117A/B
86112A (Only for E8257D/67D Opt 520/521 and E8663D)

20 dB Attenuator

8493C Opt 020

 

10 dB Attenuator

8490D Opt 010

8493C Opt 010 (Only for E8257D/67D Opt 520/521/H26 and E8663D)
  1. Only supported by the N1000A and 86100D oscilloscopes.
  2. Requires 50 GHz option (52F, 52M, 54F, or 54M) for use with DUTs with a maximum frequency of 40 GHz or greater.

Plug-In Module Vertical Calibration (for the 54750A)

  1. Remove any front-panel connections from electrical channels.

  2. Press Utility > Calibrate... > Calibrate plug-in...

  3. Select the plug-in module to be calibrated, then press 1 and 2 or 3 and 4

  4. Press Start cal to start the calibration.

  5. Follow the on-screen instructions.

Connections and Setup Procedures

  • All test equipment requires a 30 minute warmup period to ensure accurate performance.

  • In the following test setup, cables are designated as solid lines and direct connections are designated as dashed lines.

  1. Connect all test equipment as shown.

  2. Connect GPIB cables to all GPIB-controlled test equipment.

  3. While performing this performance test, follow all instructions on the controller display.

Setup for Pulse Modulation Rise/Fall Time

 

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

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

 

In Case of Difficulty

If this performance test fails, perform the following steps in order:

  1. Check the equipment setup (see above). If the setup is incorrect, make the necessary corrections and rerun the Performance Test.

  2. If this test fails with the equipment set up properly, refer to the troubleshooting section of the signal generator's service guide. If you do not have a printed copy of the service guide (Option OBW), one is available either on the CD-ROM that came with your signal generator shipment or on the Keysight Website.

  3. If you cannot correct the problem using the troubleshooting procedures in the Service Guide, obtain service from Keysight Technologies. Refer to Contacting Keysight Technologies.