Try different TX power to see what works best: 28mW, 42mW, 56mW, 70mW, 84mW. You really shouldn't go higher than 84mW unless you know what you're doing as it could overheat and shorten the life of the unit. If there is no noticeable difference between those power settings, set it to 42mW and leave it.
Also be sure you're set to 40MHz Channel Width.
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2600 Backpack Phishing Rootkit Agro Eco terrorism Conventional weapon
Target Weapons grade Dirty bomb Enriched Nuclear Chemical Biological weapon Black out
Pressure Cooker Grid Power Smart Body scanner Electric Failure Ammonium nitrate Brown Out
Bridge Organized crime National security State emergency Security Breach Threat Standoff
SWAT Screening Virus Environmental Terrorist Dock