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1460/61 INSTRUCTION MANUAL
Function Key - a key of the keypad that performs a specific task, such as all call or disabling
signal circuits
hardware - the physical components of the Master Time Programmer and options
holiday - see alternate date
hourly correction - a correction signal sent to compatible secondary clocks every hour that
synchronizes their minute hands
impulse clock - a secondary clock which has no second hand and receives a voltage “impulse”
once each minute to increment the minute hand
LCD - liquid crystal display
LED - light emitting diode
line frequency - the frequency, measured in Hertz (Hz), of line voltage
line synchronous - a time base feature that allows the Master Time Programmer to synchronize
its time keeping to line frequency
LPT port - see parallel port
Main Menu - the menu that allows the user access to program most attributes of the Master
Time Programmer, such as time of day, date, and schedule used
main schedule - the normal schedule of events of a Master Time Programmer
manual advance - a feature of the Master Time Programmer that allows the user to manually
cause an hourly correction
menu - a list of items
menu item - one element of a list of elements that comprise a menu
minute impulse - a signal sent to an impulse clock once each minute that increments its minute
hand
MODEM - a device that converts computer data into signals that can be broadcast over tele-
phone lines, and vice versa
NIST-ACTS - National Institute of Standards and Technology - Automated Computer Time
Service - a service offered by NIST in which UTC is transmitted over phone lines via
MODEM
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