Reference Manual

Table Of Contents
3. Installation
LUM0020CD Rev June-2020 Page 18 of 112 Copyright © 2019FreeWave
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3.1. Power the Radio
Connect the radio to a positive power supply with+6.0 to +27.0 VDC, (typically, +12VDC).
Warning! Do not connect the LRS455A-C, LRS455A-CE, LRS455-T series radios to
DC power without terminating the antenna port to a suitable load, such as a 50 ohm
antenna, or an attenuator with a power rating greater than or equal to 2 W.
Powering up without a load attached will damage the radio and void the warranty.
If the power supply line runs outside the radio enclosure, use electrostatic discharge (ESD)
protectors to protect the radio from electric shock and transient voltage suppressors (TVS) to
protect from an over-voltage situation.
Using both helps to ensure long-term, reliable operation.
3.2. Radio Setup Mode
To read the current settings from or to program a radio, the radio must be in Setup mode. When a
radio is in Setup mode, all three LEDs show Solid Green .
Note: OEM boards may also enter Setup when Pin 2 on a 10-point connector or Pin 8 on a 24-pin
connector is grounded, or using a break command. For more information about the break command,
see Use Break to Access Setup (on page 35).
The Setup Port (on page 33) parameter in the Baud Rate tab determines whether the main data
port or the diagnostics port is used to access the setup parameters for the radio.
Using the Setup Mode Timeout parameter in the Operation Mode tab, you can set the radio to
exit Setup Mode automatically. When the setting is enabled, if the radio has not received any
menu selections or programming information within 5 seconds, it exits Setup and resumes its
previous mode.
LRS455A-C, LRS455A-CE, LRS455-T
User-Reference Manual