Power Sweep (dBm)

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The ~~~~~.~~ softkey turns on a power sweep mode that is used to characterize power-sensitive circuits In this mode, power is swept at a single frequency, from a start power value to a stop power value, selected using the m and &YJ keys and the entry block. This feature is convenient for such measurements as gain compression.or ,&GC (automatic gain

control) slope. lb set the frequency of the power sweep, use $I# ..%RE& in the stimulus menu.

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The span of the swept power is limited to being equal to or within one of the eight pre-defined power ranges. The attenuator will not switch to a different power range while in the power sweep mode. Therefore, when performing a power sweep, power range selection wilI automatically switch to the wzunuul mode.

In power sweep, the entered sweep time may be automatically changed if it is less than the minimum required for the current configuration (number of points, IF bandwidth, averaging, etc).

CW Time Sweep (Seconds) ,. /

me &.'~&& softkey turns on a sweep mode SW= to a osfloscope. me ~~yzer&&, to a

single frequency and the data is displayed versus time. The frequency of the CW time sweep is

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set with #ZB?@&Qi in the stimulus menu. In this sweep mode, the data is continuously sampled

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at precise, uniform time intervals determined by the sweep time and the number of points minus 1. The entered sweep time may be automatically changed if it is less than the minimum required for the current instrument configuration.

In time domain using Option 010, the CW time mode data is translated to frequency domain, and the x-axis becomes frequency. In this mode, the instrument can be used as a spectrum analyzer to measure signal purity, or for low frequency (~1 kHz) analysis of amplitude or pulse modulation signals.

Selecting Sweep Modes

In addition to the previous sweep types, there are also two different sweep modes. These

 

 

 

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cm be accessed though the colp&on menu by pressing Lcal] I##= ~~~~~~~~~

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., .,.

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or ~~~~~~~~:

Refer to "Altemate md Chop Sweep Modes" in *e "Measurement

 

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Calibration” section.

Application and Operation Concepts 6-27

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HP 8753E manual Power Sweep dBm, CW Time Sweep Seconds, Selecting Sweep Modes, Calibration section