Agilent Technologies 660MHz manual External Input, External Clock/PLL Reference Input

Specifications

Agilent 81130A Specifications

External Input, External Clock/PLL Reference Input

External Input

The external input EXT INPUT is used as trigger/gate input in started and gated mode. It is sampled once per period.

External Clock/PLL Reference Input

The CLK-IN/REF input can either be used for external clock input or Phase Locked Loop (PLL) reference.

•External Clock

–The output period is determined by the signal at clock input. Frequency accuracy can be increased by using a precise external clock.

•PLL Reference

–PLL locks either to an external frequency reference at the PLL Reference Input or to an instrument’s internal reference.

–PLL is a high accuracy period (frequency) source. When locked to the internal reference, period accuracy, resolution, and jitter are improved.

When locked to an external frequency reference, the external frequency affects these accuracies.

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