Locked Indicator; Holdover Indicator; Figure 7: Normal Operation - Novatech Kronos 2 Series User Manual

First Lock
After startup, the dot matrix display displays the number of currently tracked satellites. At least four satellites
are needed to obtain a first fix. Additionally almanach and ephemeris data must be downloaded from the
satellites and the UTC offset must be determined.
Ephemeris data has to be downloaded from each satellite. This requires several minutes of strong signal
from the tracked satellites.
The UTC offset is broadcast only once every 12 minutes, so that additionally up to 12 minutes may pass
before first lock is achieved. It may take longer if the sky view is partially obstructed.
Normal Operation
During normal operation the display will show date, time and/or time zone information. Several formats are
available. See section Display Settings (Online)
Alarm
If an alarm is detected, the display shows the corresponding alarm message.

3.1.2 Locked Indicator

Blinking green: The clock is searching for satellites for the first satellite fix. Dot matrix display shows
number of satellites currently tracked.
Solid green: Time reported by the clock is locked to atomic clocks on board the satellites. Dot matrix
display shows local time, date and/or time zone, as configured.

3.1.3 Holdover Indicator

Solid yellow: Time reported by the clock is derived from the internally oscillator. Error estimates are
continuously compared to the user defined thresholds.
If the first error threshold is exceeded, the clock will generate a LOW QUALITY alarm but
will continue to report and show time.
If the second error threshold is exceeded, the clock will generate a BAD TIME alarm and
stop showing and reporting time.
or Display Settings (Offline)

Figure 7: Normal operation

16
Kronos Series 3
for details.