User's Manual

APPI-Com V3.4 – Copy prohibited www.appi-technology.com

Radio Range

The radio range (Line Of Sight) in open space between two APPI-Radios using a ½ wave antenna is more than

3Km LOS using a Long Range channel (around 900m in Eco mode), and around 300m using a SR “Short

Range” channel, but this distance can vary depending on the environment: obstacles, working within in a

building, EM perturbations, etc. It is also reduced when using a ¼ Wave or an internal antenna.

Operation Incidents

Some operation incidents may occur. Here is a list with the corrective actions:

1. The module switches on and off only seconds after displaying "NO BATTERY" ➔ the battery is low:

charge the module.

2. The module turns on but remains in search mode of communication more than 30 seconds (symbol

not received for all other modules in the kit):

• The other module(s) of the kit are off ➔ start the other module(s)

• The other module(s) of the kit are out of radio range ➔ bring the modules in range

• The module is not configured on the same channel than the other modules of the kit

➔ Restart the module and select the correct channel

• The module is not part of the kit which is in communication on this channel (different kit

number) ➔ Use the "Configuration Software" to integrate the module into the kit.

3. The « Multiplex » module turns on but stay in search mode:

• No « priority » module (in « TALK » mode) is ON or at radio reach ➔ start at least one of them to

initiate conversation: « Multiplex » modules cannot start conversation between them alone.

4. The radio range between modules is poor:

• External antenna missing or loose on some modules ➔ Install or tighten the antenna

• Another APPI-Com kit is running too close ➔ use two non-adjacent channels (1 and 3 instead of

1 and 2 for example) and / or get away from the kit’s modules.