INSTRUCTION MANUAL DC1765 Cellular Phone Package Revision: 9/94 C o p y r i g h t ( c ) 1 9 8 7 - 1 9 9 4 C a m p b e l l S c i e n t i f i c , I n c .
Warranty and Assistance The DC1765 CELLULAR PHONE PACKAGE is warranted by CAMPBELL SCIENTIFIC, INC. to be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless specified otherwise. Batteries have no warranty. CAMPBELL SCIENTIFIC, INC.'s obligation under this warranty is limited to repairing or replacing (at CAMPBELL SCIENTIFIC, INC.'s option) defective products.
DC1765 CELLULAR PHONE PACKAGE OPERATOR'S MANUAL 1. INTRODUCTION Telecommunication using cellular telephones is a convenient alternative to standard phone or RF telemetry. In areas with cellular coverage, it has an advantage over ordinary phone lines where the lines are not established and would be costly to install. The advantage over an independent RF telemetry system is that the company providing the cellular service takes care of the FCC licensing and maintenance of repeater stations.
DC1765 CELLULAR PHONE PACKAGE 3. ANTENNAS Each transceiver in a cellular phone system must have an antenna. Two common types of antennas are used, omnidirectional and directional. An omnidirectional antenna transmits and receives in any direction. A directional antenna transmits and receives in a particular direction. Fixed sites are equipped with a directional antenna because it provides the strongest signal and can be aimed at a cellular repeater site.
DC1765 CELLULAR PHONE PACKAGE 5. INSTALLATION FIGURE 5-1. DC1765 Wiring 6. COMMUNICATION USING PC208 Once consistent cellular coverage has been established on a stationary phone, interference should not be a problem. Interference on mobile phones is more easily encountered. The local cellular company can verify cellular coverage of a specific area. "COMMUNICATION BROKEN WITH DATALOGGER" error message along with the time and date of the failure in the error (.ERR) file.
DC1765 CELLULAR PHONE PACKAGE NOTE: When a program is downloaded to a station that switches power to the transceiver, communication will be broken when the program is compiled and all ports are set low . If the downloaded program does not include the instructions to switch on the transceiver, it will be necessary to visit the site and reprogram the datalogger before resuming cellular communication. 7.
DC1765 CELLULAR PHONE PACKAGE * 01: 1 10 Table 1 Programs Sec.
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