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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 instruments 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.