Page 35 399G169 Rev B 27 April 2016
4.3 FreeSpeak II Base 1.9 GHz/2.4 GHz
The two sets of equipment can be used separately or together.
Which frequency you use affects how many beltpacks can be used in any one
radio frequency (RF) cell (the range of one antenna).
Each antenna is designed to handle 5 beltpacks in the 1.9 GHz range and 4
beltpacks in the 2.4 GHz range, simultaneously and in good conditions. If
interference or propagation problems occur in an area, it may be practical to
install one less beltpack for each antenna.
For most working systems, Clear-Com uses a ratio of 3 - 4 (1.9 GHz) or 2-3
(2.4 GHz) users per antenna. This is due to system losses.
4.4 Radio frequency (RF) issues
When using system diagnostics and the site survey screen you will interpret
RSSI, FER and Link Quality.
As a general rule, Received Signal Strength (RSSI) => 30. Frame Error Rate
(FER) should be as close to 0 as possible, and Link Quality should be => 3.
4.4.1 High frame error rate (FER)
You may have a situation where RSSI is high, but FER is also high, giving a
low overall Link Quality. Potential causes of this kind of interference are:
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