SVP UDT-4K, Руководство пользователя

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UDT-4K UHD HEVC Digital Camera Transmitter
MANUAL V0
8
Safe Operating Procedures
In this section the safety requirements are shown in order to ensure
awareness of potential hazard to the personnel who is operating and
maintaining the equipment.
FCC
This chapter has been made taking into account the OET bulletin 65, from
August 1997, recommended by the FCC (Federal Communications
Commission).
The UDT-4K HEVC Transmitter designed to provide services for broadcasting,
will not create RF energy exceeding 1.0 mW/cm 2 , the FCC limit for exposure.
This is known as the Maximum Permissible Exposure (MPE) limit. This
transmitter follows this law (with the AVF flexible antenna 3 dBi) as long as
the distance between the antenna and the person is at least 4 cm. In the case
the PA-5 (5 W Power Amplifier), the minimum distance is 28.2 cm and if PA-
10 (10 W Power Amplifier) is used, the minimum distance is 39.9 cm. SVP
Broadcast Microwave, in accordance with the requirements set forth by the
FCC, provides this information as a guide to the user. Next are shown the
calculations made to obtain those values:
S = MPE in mW/cm
2
(milliwatts per square centimetres)
To follow the law, S maximum must be 1.0 mW/cm
2
𝑆𝑆 =
𝐸𝐸𝐸𝐸𝐸𝐸𝐸𝐸
4 𝜋𝜋 · 𝐸𝐸 2
𝐸𝐸𝑅𝑅𝑅𝑅𝑅𝑅 =
�𝐸𝐸𝐸𝐸𝐸𝐸𝐸𝐸
4 𝜋𝜋
EIRP = P · G
𝐺𝐺 = 10
𝐺𝐺 ( 𝑑𝑑𝑑𝑑𝑑𝑑 )
10
Where:
EIRP
: Equivalent isotropically radiated power
G (dBi)
: Antenna gain in dBi
P
: Output power of the transmitter (W)
R
: Distance from the antenna to the transmitter (cm)