Masterclock TCDS Series, User Manual

Page: 16 / 35

TCDS Series User Manual
– Rev. 2.0.1
Page 16
Operating Environment
The TCDS contains microprocessor control electronics designed to operate indoors between 32˚ to
140°F (0˚ to 60˚C) with 0-90% relative humidity, non-condensing.
The TCDS is not water or moisture proof. Treat it as you would any other delicate electronic
device and do not expose it to water, excessive heat or physical abuse.
Operation
After applying power, the clock will go through an internal check. Time from the RTC backup will be
applied until a Time Code reference is acquired.
Connect a valid time code signal to either the unbalanced BNC connector or balanced terminal block
located on the back of the clock.
The time code input circuit of the TCDS can automatically detect and synchronize to either a
single-ended unbalanced or a differential balanced time code signal.
Once a source of IRIG-B or SMPTE time code is “Locked”, the time should appear on the display. If the
time code signal is lost or disconnected, the TCDS will continue to display time based on its internal
reference until the time code signal is returned.
The colons of the clock display will flash when the time displayed is not locked to time code. When
time code is present and decoding properly the colons will remain steady-on.
If the TCDS is configured for a 12-hour time display mode an AM/PM indicator will appear in the
bottom right corner of the display during the PM hours.
To change the display to/from local time, the user must select the time zone offset for the region of
interest and if desired, the optional DST feature which automatically adjusts according to the
currently entered DST rules.
In the event that a time code source is not present, the unit is designed to operate as a standard
(stand-alone) clock using the built in RTC (Real Time Clock). The RTC is battery backed with a
maintenance free rechargeable battery. When operating in time/date display mode the operator may
program time and date information into the clock.
When time and/or date information is available from the time code source it will always
override any operator-programmed information.