Swept Frequency Accuracy

(E8257D/E8267D/E8663D Option 007 and E8257N Option 340 Only)

This test measures the PSG's frequency accuracy while it is sweeping. During a frequency sweep, the PSG generates a synchronizing signal consisting of 1601 pulses, evenly spaced in time across the sweep period. These pulses define 1600 identical time periods, or “buckets”, with the first bucket being bucket zero. Test frequencies are chosen to correlate to specific pulses during the sweep and are calculated using the following equation:

Fa = Start Sweep Frequency

Fb = Stop Sweep Frequency

Fk = Test Frequency

k = bucket number, from 0 to 1600

Required Test Equipment

Test Equipment	Recommended Models	Alternate Model(s)
Spectrum Analyzer	N9030B Opt 5xx1, YAV	N9030A Opt 5xx1, YAV E444xA2 Opt 124
Oscilloscope	DSOS104A3	54810A4 54820A4 54830B4 54831B4 54831M4 DSO8064A MSO8064A MSO8104A DSO8104A DSO9104A3 MSO9104A3
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. 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. The DSOS104A, DSO9104A, and MSO9104A can only connect via LAN or USB. If the connection to the oscilloscope cannot be sensed via the Keysight IO Libraries Suite's Keysight Connection Expert or by TME, try the LAN reset button in the LXI dialog box (accessed via Utilities > LXI). Must have firmware A.03.72 or greater.

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.

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 Swept Frequency Accuracy (using Analog Out on PXA signal analyzer)

Setup for Swept Frequency Accuracy (using Vidoe Out on PSA signal analyzer)

In Case of Difficulty

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

Check the equipment setup (see above). If the setup is incorrect, make the necessary corrections and rerun the Performance Test.
Verify that the 10 MHz OUT of the spectrum analyzer is connected to the 10 MHz IN of the signal source.
Verify that the oscilloscope's external trigger is connected. The oscilloscope will lock up when external trigger is selected and there isn't one connected to it.
If this test fails with the equipment setup 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.
If you cannot correct the problem using the troubleshooting procedures in the Service Guide, obtain service from Keysight Technologies. Refer to Contacting Keysight Technologies.