ASTRO Digital XTS 2500 Model III 91
Helpful Tips
Antenna
Radio Operating Frequencies
The following antenna types are compatible with your radio:
Before installing the antenna, 
make sure it matches your 
radio’s operating frequency. 
Antennas are frequency 
sensitive and are color coded 
according to their frequency 
range. The color code indicator 
is located in the center of the 
antenna’s base.
Your radio’s operating 
frequency is 764 to 870 MHz.
Antenna type  Approx. 
length
Insulator
color
code
Frequency 
range
Antenna 
kit no.
in. mm
800 MHz Whip, 
Halfwave
7 175 RED 806-870 
MHz
NAF5037
800MHz 
Stubby, 
Quarterwave
3.3 83 WHITE 806-870 
MHz
NAF5042
700/800MHz 
Whip
7 185 GREEN 764-870 
MHz
NAF5080
color