HP 8753E manual 55. ‘I&t Setup for Continuous Sample Mode

NETWORK ANALYZER

6’

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POWER SENSOR

pg617e

Figure 6-55. ‘I&t Setup for Continuous Sample Mode

Sample-and-Sweep Mode (One Sweep) _ .,.; ,..,..

You cm use the ~~~~~~~: softkey to a&iv& the ~ple-~&sweep mode. ‘lJ& m comea d .L..<<.

the analyzer output power and update the power meter calibration data table during the initial measurement sweep. In this mode of operation, the analyzer does not require the power meter for subsequent sweeps. You may use a power splitter or directional coupler, or simply connect the power sensor directly to the analyzer to measure the power for the initial sweep prior to connecting and meas&g the test device (see F’igure 6-56).

The speed of the calibration will be slow while power meter readings are taken (see ‘Ihble 6-7). However, once the sample sweep is finished, subsequent sweeps are power-corrected using the data table, and sweep speed increases significantly. Once the initial sweep is taken, sample-and-sweep correction is much faster than continuous sample correction.

If the calibrated power level is changed after the initial measurement sweep is done, the entire correction table is increased or decreased by that amount and the annotation PCo (indicating power calibration offset) appears on the display. The resulting power will no longer be as accurate as the original calibration.

6-164 Application and Operation Concepts