Broadcast Microwave Services Inc HCII-7 Manual De Usuario
BPA-10CC-7 1.99–2.5GHz 10W Power Amplifier Manual | Doc #6051407904 Rev -
Broadcast Microwave Services, Inc.
i
WARNING! RF RADIATION EXPOSURE HAZARD
• This warning is provided by Broadcast Microwave Services
• This warning is provided by Broadcast Microwave Services
(BMS) Inc. for safety purpose.
• The following information help to reduce the risk of RF
exposure hazard.
FCC Limit of RF Exposure
According to the Federal Communication Commission (FCC), the Maximum Permissible
Exposure (MPE) for RF radiation has been set to 1.0 mW/cm2 for the 1.99–2.5GHz linear
power amplifier with maximum of 10 watts output power (OET Bulletin 65) for operation
under part 74 of FCC regulations (47CFR74).
Exposure (MPE) for RF radiation has been set to 1.0 mW/cm2 for the 1.99–2.5GHz linear
power amplifier with maximum of 10 watts output power (OET Bulletin 65) for operation
under part 74 of FCC regulations (47CFR74).
The 1.99–2.5GHz power amplifier (PA) may be a part of a non-broadcast transmitter, and
without an antenna it will not create RF exposure (power density) exceeding the 1.0 mW/cm2
FCC limit. However, a high-gain antenna such as a parabolic dish will greatly enhance the PA
output power density beyond the MPE limit of 1.0 mW/cm2.
without an antenna it will not create RF exposure (power density) exceeding the 1.0 mW/cm2
FCC limit. However, a high-gain antenna such as a parabolic dish will greatly enhance the PA
output power density beyond the MPE limit of 1.0 mW/cm2.
In this situation a minimum distance from the antenna must be calculated in order to keep the
MPE always below the safety limit. The calculation has been done for the PA based on the
formula mentioned in OET Bulletin 56. The calculations have been done for different
commonly used antenna in the BAS and Public Safety/ Law enforcement applications.
MPE always below the safety limit. The calculation has been done for the PA based on the
formula mentioned in OET Bulletin 56. The calculations have been done for different
commonly used antenna in the BAS and Public Safety/ Law enforcement applications.
Figure 1 shows the plot of the minimum exposure distance for 5dBi, 16dBi, and 30dBi
antennas, assuming the PA transmits the maximum power of 10W. The minimum exposure
distances are found from the cross points of the exposure graphs (for various antennas) with the
line of maximum permissible exposure (i.e. 1mW/cm2). Notice that the numbers in Figure 1
predict the worse case scenario, which is straight in front of the antenna (exposing the
antenna’s main lobe). Obviously the side-lobe exposures are well below these numbers as the
radiation intensity drops dramatically on the side lobes. The antenna used for this transmitter
must not be co-located or operating in conjunction with any other antenna or transmitter.
antennas, assuming the PA transmits the maximum power of 10W. The minimum exposure
distances are found from the cross points of the exposure graphs (for various antennas) with the
line of maximum permissible exposure (i.e. 1mW/cm2). Notice that the numbers in Figure 1
predict the worse case scenario, which is straight in front of the antenna (exposing the
antenna’s main lobe). Obviously the side-lobe exposures are well below these numbers as the
radiation intensity drops dramatically on the side lobes. The antenna used for this transmitter
must not be co-located or operating in conjunction with any other antenna or transmitter.
The user and installer must provide suitable operating procedures and warnings to meet the
MPE requirements when operating the PA into an antenna.
MPE requirements when operating the PA into an antenna.
Operational Limits and User Access
CAUTION!
• Do not 5A peak load in optional accessory equipment!
• Do not 5A peak load in optional accessory equipment!
• Do not exceed -12dBm average input power!
NOTE
There are NO user adjustable components in the amplifier!
There are NO user adjustable components in the amplifier!