Agilent Technologies 8960 Series Reference Manual page 435

Rear Panel Connectors
10 MHZ REF IN
This BNC connector accepts an external 10 MHz timebase signal. The nominal input impedance is 50 ohm.
This version of test set can only accept a 10 MHz timebase signal.
10 MHZ REF OUT
This BNC connector provides a 10 MHz timebase signal to external test equipment. The accuracy of this signal
is determined by the timebase used. The nominal output impedance is 50 ohm with a typical level of 0.5 V rms.
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