Lathem AT-MSX User Manual

Wireless Sync Device

Model AT-MSX

Installation & User’s Guide

THIS EQUIPMENT COMPLIES WITH FCC CLASS-B REQUIREMENTS

PURSUANT SUBPART J OF PART-15

This device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions: (1) this device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired
operation.

WARNING: Changes or modifications to this product not expressly approved by the party
responsible for compliance could void the user’s authority to operate this equipment.

NOTE: This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one or more of the following
measures:

- Reorient or relocate the receiving antenna.

- Increase the separation between the equipment and receiver.

- Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.

- Consult the dealer or an experienced radio TV technician for help.

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled
environment. This equipment should be installed and operated with minimum distance
20cm between the radiator and your body. This Transceiver must not be co-located or
operating in conjunction with any other antenna or Transceiver.

Disclaimer

The information within this document has been carefully checked and is
believed to be entirely reliable. However, no responsibility is assumed for
inaccuracies. Lathem Time Corp. reserves the right to make changes to any
products herein to improve reliability, function, or design.

AirTime, Lathem and the Lathem logo are registered trademarks of Lathem
Time Corporation. Other product names mentioned in this manual may be
trademarks of their respective companies and are hereby acknowledged.

WARNING: Changes or modifications to this product not expressly approved by
the party responsible for compliance could void the user’s authority to operate
this equipment.

Copyright © 2009 Lathem Time Corporation. All rights reserved.

200 Selig Drive SW
Atlanta, GA 30336

www.lathem.com

Doc. No. USG0083
Revised 4-21-2009

Lathem Inc

Installation & User’s Guide

Operation

When connected to AC power, the AT-MSX automatically

powers up and an LED on the case bottom flashes 3 times then

begins flashing every 2 seconds indicating that the AT-MSX is

waiting to receive an AirTime radio signal. The LED will flash

brighter upon receipt of an AirTime signal. The AT-MSX will set

its internal clock to the exact time and the LED will flash every

second to indicate normal operation. The unit will transmit

the Lathem RS485 digital signal once per minute, to provide

time synchronization to other Lathem devices. It also closes

the dry relay contact for two (2) seconds once per day at 23

hours 59 minutes and 58 seconds to provide a synchronization

time reference signal to external third party devices such as an

intercom system.

Physical

The AT-MSX contains a microprocessor and UHF radio receiver

housed inside an impact resistant keyhole wall mount plastic

enclosure. The bottom of the enclosure features a five (5)

place removable terminal block connector for wiring to

external devices, a red LED signal reception indicator, four (4)

position program jumpers, and power port for an external AC

power adaptor.

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