Frequency Switching Speed

(E8257D Option H42 Only)

Frequency switching speed is defined as the time required for the DUT to switch from one frequency to another. Switching starts at the receipt of a SCPI command or trigger signal. Switching ends when the signal settles to within 100 Hz of the final frequency.

The signal generator is set to sweep mode, switching from one frequency point to another. The spectrum analyzer is set to capture the FM deviation at the stop frequency. Then, the function generator is used to simultaneously trigger both the signal generator frequency switch and the start of the spectrum analyzer’s sweep. The spectrum analyzer measures the time it takes for the signal to settle within the tolerance.

Required Test Equipment

Test Equipment

Recommended Models

Alternate Model(s)

Spectrum Analyzer

N9030B Opt 5xx1, MPB, N9063EM0E Analog Demodulation Measurement application

N9030A2 Opt 5xx1, MPB, N9063EM0E Analog Demodulation Measurement application

E444xA3 Opt 123 and 233

Function Generator

33622A

33611A
33612A
33621A
33250A
33120A Opt 001
  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. An N9030A/B Option 550 is required for units with Option 567. The N9030A/B Option 550 frequency range is adequate for all PSG-D frequency configurations.
  2. To use the PXA N9030A with N9063EM0E Analog Demodulation Measurement application functionality above 3.5 GHz, the N9030A must be upgraded with either Option MTU or TES. Refer to the section in the Required Test Equipment topic.
  3. 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. An E4448A is required for units with Option 567. The E4448A frequency range is adequate for all PSG-D 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.
  • This performance test has a smart connection feature.
  1. Connect all test equipment as shown.
  2. Connect GPIB cables to all GPIB-controlled test equipment.
  3. While performing this adjustment, follow all instructions on the controller display.

 

Setup for Frequency Switching Speed (using PSA)

Setup for Frequency Switching Speed (using PXA)

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.