Overview
The Model 1275A is a multifunction time of day display, capable of acting as a self contained, pre-
settable clock, or as a slave to a master clock system.
Features:
1 second per week accuracy in stand-alone mode
•
12- or 24-hour mode
•
Internal crystal time base or AC line time base
•
Reads SMPTE/EBU or DQS-B6 (optional) time code format
•
Operation
As a slave display the standard version of the clock reads SMPTE/EBU Time code. The user can program
time zone offsets from the incoming code.
NOTE: The version that reads DQS-B6 time code is available as a special order
As a standalone clock it can be programmed to operate in either 12- or 24-hour mode. Two front panel
push buttons allow presetting and accurate synchronization to a time source when the clock is operating in
standalone mode.
Setting the time in Standalone Mode
To set hours: hold the
Hold the button down until the desired value is achieved.
To set minutes: press and release the
Each press of the
SET
To set seconds: press and release the
Each press of the
START
Rear Panel Removal and Connections
Removing the rear panel permits:
Connection of the power cord
•
Connection of a time code input
•
User selection of four different operating modes
•
Setting of the time zone offset.
•
NOTE: THE AC VOLTAGE IS FACTORY SET
LABEL
GND
SUPPLY
NEUT
LIVE
TIME CODE
COM
Printed July 3, 2002
Model 1275A Time Display / Clock Quick Reference Guide
button down for more than 1 second.
SET
button.
SET
button advances one minute.
START
button advances one second.
CONNECTION
GROUND WIRE – GREEN
NEUTRAL WIRE – WHITE
LIVE WIRE – BLACK
DQS-B6 or SMPTE/EBU INPUT
COMMON GROUND
button.
Revision 3
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