Model 1275A Time Display / Clock Quick Reference Guide
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 SET button down for more than 1 second.
Hold the button down until the desired value is achieved.
To set minutes: press and release the SET button.
Each press of the SET button advances one minute.
To set seconds: press and release the START button.
Each press of the START button advances one second.
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 CONNECTION
GND GROUND WIRE – GREEN
SUPPLY NEUT NEUTRAL WIRE – WHITE
LIVE LIVE WIRE – BLACK
TIME CODE DQS-B6 or SMPTE/EBU INPUT
COM COMMON GROUND
Printed July 3, 2002 Revision 3 Page 1 of 4
