Operations Manual

INSTALLATION 3-4
O&M of the MCC-545B PACKET DATA RADIO
12/2000
In a LOS or ELOS System, the higher the antenna the better. In general every time the height is
double the system gain is increased by approximately 6 dB.
REMOTE STATION ANTENNA HEIGHT FOR METEOR BURST
FIGURE 3.1-1
Antenna coax cable length must be kept as short as possible, to minimize line loss. Maintain a
line loss between antenna and 545 of less than 1 dB if possible. A table of cable loss (at 50 MHz)
for various types of co-ax is given below for reference.
CABLE Loss/100 feet dB Diam. Inches Weight/100 feet lbs.
RG 223, RG 58 3.0 .211 3.4
RG 214, RG 8 1.8 .425 12.6
RG 17 1.2 .870 20.1
LDF4A-50 ½ inch heliax .48 .500 15.0
LDF5A-50 7/8 inch heliax .26 .875 33.0
Best Antenna Height
0
5
10
15
20
25
30
100 150 200 250 300 350 400 450 500
RANGE (mi)
Antenna Height (ft)
40 Mhz
45 Mhz
50 Mhz