
AIMA-FT5S
Product User Manual
Pacific Broadband Networks
18 July 2014
Page 43 of 62
Option 2
Broadcast port setup
1.
Set “
Input AGC Mode
” to OFF and click "
Submit
" to apply the setting
2. Apply the Channel load of the 50 channels analog RF load with a level of 15 dBmV to the
transmitter.
3. Set the Broadcast MGC setting to 16.6 dBmV
– 15 dBmV =
1.6 dB
. Click "
Apply
" to store
setting at the transmitter
Narrow cast port setup
1. Apply the QAM RF load to the NC input of the transmitter at 15 dBmV.
2. Set NC MGC backoff to
– 6 dB by subtracting 6 dB from the BC MGC setting (1.6 dB)
1.6
– 6 =
-4.4 dB
3. Set Narrowcast MGC to -4.4 dB
4. Click the "
Apply
" button to store setting into the transmitter.
6.5 Setup using separate BC and NC RF input in AGC mode
Since no QAM RF signals are used in sample calculation 1 or 2, this setup will use sample calculation
3. For the exact RF calculation, please refer to Chapter 6.1.1 sample calculation 3.
Sample calculation 3 details:
Total RF power
50 channels analog
= 50 analog equivalent
13 x QAM @ -10 dB
= 1.3 analog equivalent
15 x QAM256 @ -6 dB = 3.8 analog equivalent
------------------------------------------------------------------------------------------------- +
Totals 55.1 analog equivalent channels