Alternate Timeslot Power Settling Time

(Option UNA Only)

This test measures the time required for a waveform envelope to settle within the tolerance of its final amplitude after a sharp amplitude transition provided by the Alternate Timeslot Power feature (Option UNA). Settling time is the result of heating and cooling effects in the step attenuator and ALC loop. The rise and fall response times of the ALC loop and each attenuator segment is characterized and combined to construct the settling curve for any arbitrary transition.

Required Test Equipment

Instrument

Critical Specifications for This Test

Recommended Model1

Spectrum Analyzer

Marker Accuracy; Log Fidelity

E444xA2 Opt 1DS, 1233

10 dB Attenuator

None

8491B Opt 010
  1. Refer to the main equipment list for alternate models.
  2. Depending on your frequency range needs, choose either an E4440A, E4443A, E4445A, E4446A, or E4448A. (E4447A is for Power Level Accuracy adjustment only.)
  3. Options 1DS and 123 are for ESGs > 3 GHz.

Connections and Setup Procedures
  • All test equipment requires a 30 minute warm-up period to ensure accurate performance.
  • In the following test setup, direct cable and adapter connections are designated as solid lines. Changeable cable and adapter 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.