Lathem ATX User Manual
Model ATX
AirTime Wireless Wall Clock Transceiver
Installation & User's Guide
Copyright © 2009 Lathem Time Corporation. All rights reserved.
Table of Contents
Introduction ............................................................................. 1
LCD Display – Time, Date, Time Zone and Indicators ............................ 1
Indicators on LCD Display ............................................................. 1
Mode Selection .......................................................................... 2
Start Here............................................................................. 1
Master Mode ............................................................................. 1
Repeater Mode (Used in Multiple ATX Installations) ............................... 6
Setup (Repeater Mode) ................................................................ 6
Glossary of Definitions:................................................................ 8
Selection of Mode....................................................................... 8
Operation of Master Mode............................................................. 8
Operation of Repeater Mode.......................................................... 8
Operation of Reset in Master Mode.................................................. 8
How to access Setup Modes........................................................... 9
Automatic Interference Prevention Function ....................................10
Backup Function .......................................................................10
WWVB Reception Off/On Function .................................................10
Battery Life Indicator .................................................................10
Power Requirements..................................................................11
Troubleshooting .......................................................................11
Performance............................................................................13
ATX Installation and User’s Guide
Introduction
The ATX (AirTime Transceiver) is a user-installable, battery-operated
radio-frequency unit that provides the wireless signal to keep AirTime wall
clocks within its range synchronized to the second. The ATX can receive the
WWVB signal
North America
and 6” digital model AirTime wall clocks. The ATX can be operated using 2 –
CR123A batteries rated with a five (5) year life or powered by an optional AC
adapter. AirTime is an affordable time keeping solution for institutions such
as schools, hospitals, offices or any environment that requires precise and
consistent time from room-to-room. Should any problems arise with your
ATX please contact Lathem Time at 800-241-4990.
Function Labels
from a radio station used by millions of people throughout
and transmit the accurate time to 12” and 15” analog and 4”
LCD Display – Time, Date, Time Zone and Indicators
Indicators on LCD Display
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ATX Installation and User’s Guide
Transmitting
“TRNS”
When flashing, indicates the ATX is transmitting an AirTime signal
Receiving
“RECV”
When flashing, indicates the ATX is in receiving mode listening for an
AirTime signal. (used in Repeater mode)
Daylight Savings Time
When illuminated, indicates that the ATX is in Daylight Savings Time.
Reception strength
In Master mode indicates the strength of the WWVB signal when
receiving.
In Repeater mode displays for 5 seconds indicating the strength of the
signal from the Master when a signal is received.
Low battery
Indicates the batteries should be replaced.
Link
“LINK”
Indicates data reception from another AirTime transmitter was
successful within the last 24 hours. (Used in Repeater mode)
WWVB receiving
When steady, indicates successful reception of the WWVB signal. When
scrolling, the ATX is listening for a WWVB signal.
Other Indicator - Flashing Red LED
This indicates that a Repeater ATX failed to receive the signal from a
Master ATX Transceiver. Press the Reset button or move the ATX to a
location that is closer to the Master ATX.
Mode Selection
The ATX can operate in either of two modes, Master or Repeater. The
most common mode is “Master”. In Master mode, the ATX receives and
synchronizes with the WWVB signal. It then transmits the signal to
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ATX Installation and User’s Guide
AirTime wall clocks and ATX Repeaters. The WWVB signal strength
indicator
indicates the strength of the WWVB signal being
received. The ATX ideally should be placed near a window facing
Boulder, Colorado or under a skylight with a clear view of the sky for best
signal reception. In Master mode, the ATX can also be set manually if no
WWVB signal is available. The accuracy of the ATX without the WWVB
signal is +/- 5 minutes per year. Note: If the ATX (in Master Mode) does
not receive the WWVB signal, the clocks will not function properly.
Master Mode
When using more than one AT Transceiver, you can set the ATX to
operate in “Repeater” mode. See page 9 for setting the ATX as a
Repeater.
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ATX Installation and User’s Guide
Start Here
Master Mode
!! IMPORTANT !!
This AirTime System is designed to provide highly accurate and
reliable time reference in your building. You must follow these
instructions or your clocks will fail to operate properly. You must
allow the transmitter to sit overnight and receive the WWVB signal
before installing your wall clocks.
FOLLOW THESE INSTRUCTIONS BEFORE INSTALLING THE WALL
CLOCKS
1. Remove the back cover of ATX and slide the Mode Selection
switch to the Master position.
2. Insert two (2) CR123A lithium batteries (provided) and replace
the back cover or connect the optional 6VDC adapter. Note: You
can not use both the batteries and the AC adapter at the same
time. (If the ATX looses power, replace the batteries or check
the optional AC adapter and reset the clock starting at step 1
above)
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