evertz 1275A User manual
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
Model 1275A Time Display / Clock Quick Reference Guide
Rear Panel DIP Switch Settings
An eight-position DIP switch is used to select operating modes, and to set the time zone offset.
A label on the rear panel gives an overview of the switch functions.
NOTE: The DIP switch functions of the DQS-B6 version differ from those of the standard unit.
ON
1▀2▄3▀4▀5▄6▄7▄
Display Format
1 LED on off off
3 LEDs on on off
All LEDs on off on
12 hour off
24 hour on
Input Code
DQS-B6 off off
SMPTE/EBU on on
Internal DIP switch settings
Operating Mode
Slave display off off
Clock AC line off on
Clock external on on
Printed July 3, 2002 Revision 3 Page 2 of 4
Model 1275A Time Display / Clock Quick Reference Guide
Standard Version DIP Switch Settings
DQS-B6 Version DIP Switch Settings
Display Mode
SWITCH NUMBER:
1 2 3 FUNCTION
OFF SLAVE MODE
ON CLOCK, XTAL
OFF 1 LED ON
ON ELAPSED LED’s
OFF 12 HOUR MODE
ON 24 HOUR MODE
Time Zone
SWITCH NUMBER:
4 5 6 7 8 TIMEZONE
OFF OFF OFF OFF OFF 0 Hour
ON OFF OFF OFF OFF +1 Hour
OFF ON OFF OFF OFF +2 Hours
ON ON OFF OFF OFF +3 Hours
OFF OFF ON OFF OFF +4 Hours
ON OFF ON OFF OFF +5 Hours
OFF ON ON OFF OFF +6 Hours
ON ON ON OFF OFF +7 Hours
OFF OFF OFF ON OFF + 8 Hours
ON OFF OFF ON OFF +9 Hours
OFF ON OFF ON OFF +10 Hours
ON ON OFF ON OFF +11 Hours
OFF OFF ON ON OFF +12 Hours
ON OFF ON ON OFF +13 (-11) Hours
OFF ON ON ON OFF +14 (-10) Hours
ON ON ON ON OFF +15 (-9) Hours
OFF OFF OFF OFF ON +16 (-8) Hours
ON OFF OFF OFF ON +17 (-7) Hours
OFF ON OFF OFF ON +18 (-6) Hours
ON ON OFF OFF ON +19 (-5) Hours
OFF OFF ON OFF ON +20 (-4) Hours
ON OFF ON OFF ON +21 (-3) Hours
OFF ON ON OFF ON +22 (-2) Hours
ON ON ON OFF ON +23 (-1) Hour
Operating Mode
SWITCH NUMBER:
4 5 FUNCTION
OFF OFF SLAVE MODE
OFF ON AC LINE TIME BASE
ON ON INTERNAL TIME BASE
Display Mode
SWITCH NUMBER:
1 2 3 FUNCTION
OFF OFF --- 1 LED ON
ON OFF --- 3 LED’s ON
OFF ON --- ALL LED’s ON
--- --- OFF 12 HOUR MODE
--- --- ON 24 HOUR MODE
Input Code Format
SWITCH NUMBER
6 7 FUNCTION
OFF OFF DQS-B6 CODE
ON ON SMPTE / EBU CODE
Printed July 3, 2002 Revision 3 Page 3 of 4
Model 1275A Time Display / Clock Quick Reference Guide
Specifications
Electrical
Mechanical
Power:
1275A-110:
1275A-220:
115V 60Hz 15 VA
(220V 50Hz optional)
Dimensions: 9.6” W x 9.6” H x 2.125” D
(244mmW x 244mmH x 54mmD)
Weight: 4.4lb
Code input:
Standard:
Optional:
SMPTE/EBU Time code
20 kΩbalanced/unbalanced
DQS-B6 or SMPTE/EBU Time code
20 kΩbalanced/unbalanced
Accuracy: Approximately 1 sec per week
In STAND-ALONE mode on internal
X-tal oscillator.
Access: 1” (25mm) diameter hole in rear
panel to accommodate electrical
conduit.
Time Zone: +/- 12 hours in 1 hour increments
Offset from SMPTE/EBU code input
on standard version..
© Copyright 2002
Evertz Microsystems Ltd.
5288 John Lucas Drive,
Burlington, ON L7L 5Z9
Fax: 905-335-3573
http://www.evertz.com
Printed July 3, 2002 Revision 3 Page 4 of 4
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