CalAmp GUARDIAN User Manual download pdf (Page 9)

1 GUARDIAN OVERVIEW

This document provides information required for the operation and verification of the CalAmp Guardian narrowband

modem.

1.1 GENERAL DESCRIPTION

This DSP-based radio is designed for SCADA, telemetry, and industrial applications in the 136-174 MHz, 215-240

MHz-VHF, 406.1-512 MHz UHF, and 928-960 MHz frequency ranges

Guardian supports serial Remote Terminal Units (RTU) and programmable logic controllers (PLC).

1.2 OPERATIONAL CHARACTERISTICS

The Guardian Narrowband Modem has the following operational characteristics.

• Frequency range of 136-174 MHz, 215-240 MHz, 406.1-470 MHz, 450-512 MHz, or 928-960 MHz.

• User-selectable data rates.

• Built-in transceiver adjustable from 1 to 10 watts (8 watts max for 900MHz).

• Wide input power range of 10 to 30 volts DC.

• Online and Offline Diagnostics.

• Supports up to 8 different link configurations which include frequency channel pairs

(selectable through user interface port). See the following section, 1.3 Link Configurations.

• Industrial operating temperature range of -30° C to +60° C.

• Rugged die-cast aluminum and steel case.

• UL Certified for Hazardous Locations when powered by a listed Class 2 source.

These features provide system benefits that give users

Rugged Packaging Guardian is housed in a compact and rugged cast aluminum case. Built for industrial applications in a

variety of environments, Guardian operates over an extended temperature range and provides worry-free operation in

the roughest environments.

Simple Installation Basic installation typically utilizes an omnidirectional antenna at the master station or Relay Point

and a directional antenna at each remote site not a Relay Point. See Sections 2.3, 2.4, and 2.5 for information about

Site and Antenna Selection. For basic service, just hook up an antenna, apply primary power, then check and set a few

operating parameters and you are done.

Flexible Management Configuration, commissioning, maintenance and troubleshooting can be done locally or

remotely. There are no physical switches or adjustments. The Full-Duplex Guardian allows for simultaneous reception

and transmission of data, and feature dual ports. All Full-Duplex models and the 900 MHz Dual-Port model provide a

receive antenna connector allowing for unique customer applications requiring additional receive filtering, external

PA(s), and other options.

Long Range Narrowband configurations allow better coverage over harsh terrain.

Guardian™ Serial Modem or Analog Radio for Licensed Spectrum PN 001-5006-000 Rev. 3 | Page 1

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CalAmp GUARDIAN User Manual Page 9