Internal Pulse Modulation Level Accuracy

(N5161A / N5162A / N5166B / N5171B / N5172B / N5181A / N5181B / N5182A / N5182B / N5182N Option UNW Only)

This test verifies that the pulse level accuracy of the internal pulse modulator meets specifications.

During the test, the peak-to-peak amplitudes of the CW and PULSE ON signals are measured with a high-frequency, digitizing oscilloscope. The signal generator is placed in CW mode at a certain power level and an oscilloscope is used to measure the peak-to-peak excursion. The signal generator is then pulse modulated by its internal pulse generator and the peak-to-peak measurement is repeated with an oscilloscope.

Required Test Equipment

Test Equipment

 

Critical Specifications for This Test

Recommended Model

Alternate Model(s)

High Frequency Oscilloscope Mainframe

None

N1000A

86100A/B/C/D
54750A

Oscilloscope Plug-In

None

N1045B1

N1045A1
N1055A2

86117A
86117B
54752A
83484A
86112A

10 dB Attenuator

None

8493C Opt 010

8490D Opt 010
8491A Opt 010
8491B Opt 010
8493A Opt 010
8493B Opt 010

20 dB Attenuator

None

8493C Opt 020

8490D Opt 020
8491A Opt 020
8491B Opt 020
8493B Opt 020
8493C Opt 020
  1. The N1045A/B are only supported by the N1000A and 81600D oscilloscopes. Option 02M (2 channels, 1.85 mm, male) is recommended for the N1045A.
  2. The N1055A is only supported by the N1000A and 81600D oscilloscopes. Option 52M (50 GHz BW, 2 channels, 1.85 mm, male) is recommended for the N1055A.

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. If using the N1045A/B or N1055A oscilloscope plugin, the N1000A or 86100D oscilloscope mainframe must be in the FlexDCA and not the Legacy UI configuration. If necessary, select Apps > FlexDCA from the user interface. (The 86100D can be in either the FlexDCA or Legacy UI configurations when used with dual-slot plug-ins such as the 54752A or 86112A plug-ins.) When switching configurations, be sure that the GPIB address is correctly set in the new configuration. The FlexDCA and Legacy UI configurations maintain independent GPIB addresses which is why TME is unable to automatically switch to the proper configuration.

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

 

Setup for Internal Pulse Modulation Level Accuracy

 

For legacy test equipment, Closedclick here:

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. Refer to the troubleshooting section of the 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 search for your signal generator model number on the Keysight website.

  3. If necessary, obtain service from Keysight Technologies. Refer to Contacting Keysight Technologies.