
AIMA-FT5S
Product User Manual
Pacific Broadband Networks
18 July 2014
Page 32 of 62
6.1.1 Determine the RF power to the RF input port.
In order to set up the port configuration for the FT5S transmitter, the proper RF level must to be
determined and applied to the transmitter. The factory default RF load is listed below
Number of analog RF channels = 80
RF level for 80 channels = 15 dBmV
This ensures an OMI of 2% per channel
The channel load listed above is the reference RF load for the FT5S transmitter. Any deviation from
this RF load will require new RF levels to be calculated based on 80 analog channels for a designated
RF input level of 15 dBmV.
To recalculate the RF input level following formula can be used:
(Na) = number of channels to be used by the transmitter
Example
Example 1 is to verify the RF calculations. The standard channel load will be used to determine the
correct RF input at the transmitter for 80 channels.
Channel load is 80 analog channels
Peak analog input = 34
– 10 LOG (80)
Peak analog input = 34
– 19
Peak analog input =
15 dBmV
The calculated RF level is 15 dBmV as specified on the datasheet. .
PEAK analog RF input = 34
– 10 LOG (Na)