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AIMA3000.FT5S Product User Manual
Technetix Group Limited
•
technetix.com
May/2016 - Version 1.0
36
Totals 55.1 analogue equivalent channels
RF level to be applied to the transmitter
Channel load = 55.1 analogue channels
PEAK analogue RF input = 34 - 10LOG (Na)
(Na) = number of channels to be applied to the transmitter
Peak analogue input = 34 - 10LOG (55.1)
Peak analogue input = 34 - 17.4
Peak analogue input = 16.6
dBmV
To calculate OMI for 55.1 analogue channels
In this example when applying a channel (55.1 channels) load at the transmitter at 17.8dBmV the OMI per channel is:
OMI per analogue channel = ((OMI
80
x (√(Na
80
/2)) x (√(2/Na
new
))
Omi
80
= OMI for 80 channels (4%)
NA
80
= Channel load 80 channel (factory std)
NA
new
= Actual channel load at transmitter = 55.1 channels
OMI per analogue channel = (OMI
80
x (√(Na
80
/2)) x (√(2/Na
new
))
OMI per analogue channel = (0.04 x (√(80/2)) x (√(2/55.1))
OMI per analogue channel = 0.04 x 6.32 x 0.1905)
OMI per analogue channel = 0.0481 = 4.81%
Содержание AIMA3000.FT5S
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