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5000/5100 Series Digital Analog Clocks Installation and Operation Manual
Chapter 2: ADC-5100 Series Analog Digital Clocks
Introduction
The ADC-5100 Series Analog Digital Clocks are a group of quiet,
digitally controlled, self-setting analog face clocks. These may operate
either stand-alone via power line frequency or internal crystal, or with a
SMPTE or EBU serial timecode input.
When provided with a SMPTE or EBU timecode source, the ADC
Series Clocks are self-setting. If the timecode is valid, the ADC Series
Clocks will advance or reverse their hand positions to the correct time.
In the event of a power failure, the ADC Series Clocks maintain the
correct time internally via a battery-backed timekeeping memory. If
power should be restored without timecode, the ADC Series Clocks will
self-set to the correct time as maintained by the battery backup, and
then continue to operate on internal crystal or power line timebase.
The ADC clocks may operate with either a sweep or step second hand,
and will automatically decode either SMPTE or EBU timecode inputs.
Additionally, the ADC may function as a timecode generator when
operated from its internal crystal. Either SMPTE or EBU timecode may
be generated and used to drive other clocks (in Master Mode).
Note
Internal connector ‘P1’ must be reversed for Master Operation.
The ADC Series clocks are compatible with a user-defined auxiliary
offset when driven from the following clock system drivers;
•
MTG-3901 Master Timing Generator
•
CSD-3901/3902 Master Clock System Driver
•
CSD-5300 Master Clock System Driver.
A local offset can also be provided by electronically re-positioning the
clock hands.
In the event of a timecode input failure, an error LED (located on the
clock face under the 6) will flash at the rate of twice per second. The
ADC clock will then automatically switch to the user-selected
secondary timebase, either power line frequency or internal crystal. The
power line frequency is automatically determined during power-up. The
error LED will illuminate during power-up to indicate 50 Hz power line
frequency detection.
