To save a png format screenshot of the current data, click Save.To select devices, click the drop-down menu at the top.The histogram is continually updated, with measurements taken roughly once per second. The vertical axis shows the number of measurements recorded at each data point, on a logarithmic scale. the frequency that the clock is intended to run at - for example, 98kHz). The zero point of the horizontal axis corresponds to the clock's nominal frequency (i.e.
The horizontal axis of the histogram shows the distribution of clock frequency offset measurements against the nominal frequency of the clock, in parts per million (ppm).
WORD CLOCK FREQUENCY SOFTWARE
Software clocks can support any amount of offset. Software clocks typically use an algorithm to derive a clock from an internal counter. If the pull range is exceeded, the follower clock will lose sync with the leader clock, and the device will be automatically muted. Hardware clocks can only support a certain amount of offset, referred to as 'pull range'. The amount that the clock's frequency is pulled is referred to as 'offset'. When a device ('follower') clock wants to sync to a leader network clock, its frequency must be 'pulled' up or down to match the frequency of the leader clock. All crystals are slightly different, and vibrate at slightly different frequencies. Hardware clocks are based on a vibrating (piezoelectric) quartz crystal. The following information is also displayed: It shows a histogram of clock frequency offset for the selected device, and the current frequency offset value, updated in real time. The History tab can be used to establish the stability of device clocks. To save the event log as an xml file, click Save. Note: This will also clear all other event log entries (the Clock Status log is a filtered view of the main event log).ĭante Controller will then resume monitoring (unless the Clock Status Monitoring button is switched off). This will reset the Clock Status Monitor icon to green. To delete all Clock Status log entries, click Clear. Clock Sync Locked: Indicates that a device has regained sync with the leader clock.This will result in the device being automatically muted until it regains sync. Clock Sync Unlocked: Indicates that a device has lost sync with the leader clock.Clock Sync Warning: Indicates that a clock has been identified as unstable, and is at risk of losing sync with the leader clock.The Clock Status log shows time-stamped clock status events for each device that has been identified as unstable, or has lost or regained sync with the leader clock.
The Clock Status Monitor includes two tabs, Log and History.