User's Manual

10 Operating Manual
B. Antenna / Separations
This relates to operation in 400MHz Licensed Band
Antenna
Impedance
(ohms)
Antenna Gain (dBi)
Minimum Separation
Distance (cm)
Minimum Gain
50
0
24
Maximum Gain
50 10 77
RF EXPOSURE DISTANCE LIMITS
S
EIRP
S
GP
r





 44
Sample calculation:
S = 406.1/1500 mW/cm
2
EIRP = 51 dBm = 10
55/10
mW = 125893 mW (Worst Case)
(Minimum Safe Distance, r) =
cm
S
EIRP
7.76
)1500/1.406(4
2000
4





WARNING:
Changes or modifications not expressly approved by Microhard Systems Inc. could void the user’s
authority to operate the equipment. Please Contact Microhard Systems Inc. if you need more information.
WARNING:
To satisfy FCC RF exposure requirements for mobile transmitting devices, a separation distance is based
on the above them ranging from 24 cm to 77 cm between the antenna of this device and persons during
device operation. To ensure compliance, operations at closer than this distance is not recommended. The
antenna used for this transmitter must not be co-located in conjunction with any other antenna or
transmitter.