Imagine ADC-A12C31, Installation And Operation Manual, Page: 36 / 39

ADC-A12C31 Operator’s Handbook Rev. A P. 35
Displayed time [local] is off a small amount.
Possible reasons/solutions:
1.
Perception/recognition response time. The average human ability to visually perceive and
recognize time synchronization and/or instantaneous change between two visually separated
systems is limited due to the movement of the eyes and the delayed response to process the
data. To reduce this effect:

Place a digital display adjacent to the clock you are trying to verify the time on.

View the clocks from a position that will avoid eye movements.

Ensure that both clocks are locked to an accurate time code reference.

Ensure that both units have the same offset settings for time zone and/or DST.
2. ADC-Set configuration utility’s screen display is a GUI (Graphical User Interface) that is not being
run at the highest priority level for the system. There will likely be a delay in processing the data
and updating the screen, therefore it should not be considered an accurate reference.
3. Ensure that you are not using Drop-Frame SMPTE time code. Drop-Frame time code is not
supported. Accurate time cannot be guaranteed with drop-frame time code.
4. The clock hands have been incorrectly calibrated with either the calibration buttons or ADC-Set
configuration utility. See the calibration procedure for details on how to recalibrate the hands.
DST is not properly negotiated.
The date shown in the status window of ADC-Set configuration utility is always 01/01/2000.
Possible reasons/solutions:
1.
Your time code reference is not providing date/year information. The DST adjustment will not
work unless valid date information is provided. Verify that your time code reference has either
date encoding to the SMPTE standard for SMPTE time code or year/date encoding to the IEEE
1344 specification for IRIG-B/B1 time code.
2. The TC control DIP switches S2-1 and S2-2 have both been set to off and/or the time code date
encoding has been disabled in the ADC-Set configuration utility.
3. Your time code reference already provides the DST adjustment. The DST adjustment in the ADC-
A12C31 should be disabled.
4. You have disabled the DST setting or the incorrect DST setting was enabled. The ADC-A12C31 has
DIP switches for enabling various modes of DST or disabling the DST option. In addition to the DIP
switches, the ADC-Set configuration utility may be used to set the DST settings as well as all
configuration settings of the clock. If the ADC-Set configuration utility is used, it will over-ride the
DIP switch settings.
The clock hands are not moving and the red status LED is off.
Possible Reasons/solutions:
1.
The clock does not have power applied.
2. The Run/Set switch is in the SET position or the ADC-Set configuration utility is being used.
3. The internal power supply or the motor/motor drive has failed.
There are no user serviceable parts inside the ADC-A12C31 analog clock.
Please contact Imagine Communications Corporation if you require servicing or repair.