REFS Menu (I/O & Sync)
This Sub Page menu is where you can view the Deviation and Jitter of the External Reference, as
measured by the Horus synchronization circuitry.
Frequency:
Delta:
Meters Menu
The Meters menu is inactive as it is not yet implemented
PreAmp Menu
The PREAMP (A/D) menu becomes active if you have 1 or more AD8(P) modules installed in the Horus
unit, giving full access to the Input controls. Please see below for a description of the buttons available.
The long-term measured Frequency (in Hz) and deviation in ppm (parts per
million) between the signal the unit is locked on to and the internal reference.
The short-term (instantaneous) time offset between the reference signal and
the internal (considered as ideal) reference, measured in nanoseconds (ns).
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Horus User Manual
Page 34