AM Frequency Response (External)

(N5166B / N5171B / N5172B / N5181B / N5182B / N5182N Option UNT Only)

Amplitude modulation frequency response (external) measures the variation of the actual AM modulation depth at a given CW frequency for an externally generated modulation source.

Required Test Equipment

Test Equipment

Critical Specifications for This Test

Recommended Model

Alternate Models

Spectrum Analyzer

AM Depth Accuracy

N9030B Opt 5xx1

N9030A Opt 5xx1
E444xA2

Function Generator

None

33622A

33611A
33612A
33621A
33250A
33120A Opt 001

Digital Multimeter

AC Voltage Accuracy

3458A Opt 002

34470A
  1. Select any option of PXA spectrum analyzer (503, 508, 513, 526, 543, 544, 550) that has a maximum frequency greater than or equal to the maximum frequency of the unit under test. The N9030A/B Option 550 frequency range is adequate for all DUT frequency configurations.
  2. Select any model of PSA spectrum analyzer (E4440A, E4443A, E4445A, E4446A, E4447A, E4448A) that has a maximum frequency greater than or equal to the maximum frequency of the unit under test. The E4448A frequency range is adequate for all DUT frequency configurations.

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 test, follow all instructions on the controller display.

 

Recommended Test Setup

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.