Adtran TRC6420 Manual Do Utilizador

TRACER 6420 System Manual

Section 2  Microwave Path Engineering Basics

612806420L1-1A

Copyright © 2005 ADTRAN, Inc.

17

λ)

The carrier wavelength is the physical wavelength of the main RF carrier being used for communication, 
and is usually approximated at the center frequency of the band (which is 5787.5 MHz for the 

 

TRACER 6420). The carrier wavelength calculations follow:

λ = c / f (meters)

where 

c = speed of light (in meters)

 

f = frequency (in Hz)

resulting in the following carrier wavelength:

λ = 3.00 x 10

8

 / 5787.5 x 10 

5 

 

= 0.0518 m or 5.18 cm

The path distance is simply the physical distance between the transmit and receive antennas. For the 
TRACER 6420, these distances can range up to 30 miles. 

System losses are defined by RF coaxial cable loss, connector losses, and losses added from any additional 
lightning protection devices for the power budget analysis. Coaxial cable is required to attach the 
TRACER 6420 to the antenna. The length of the cable varies from a few feet to hundreds of feet, 
depending upon your application and the proximity of the TRACER 6420 to the antenna. Various grades 
of coaxial cable will work sufficiently well for connecting the TRACER 6420 unit to the antenna. A 
low-loss coaxial cable will minimize cable losses.

One end of the coaxial cable requires an N-type male connector (plug) to mate with the TRACER 6420 
unit. The other end of the coaxial cable requires a connector compatible with the antenna chosen for the 
installation (usually an N-type male connector). Additionally, ADTRAN recommends that the outdoor 
connector on the coaxial cable be weatherproofed to prevent corrosion and electrical shorting.