AIMA3000.FT5S Product User Manual
Technetix Group Limited
•
technetix.com
May/2016 - Version 1.0
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6.4 Setup using separate BC and NC RF input in MGC 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 61.1 sample calculation 3.
Sample calculation 3 details:
Total RF power
50 channels analogue = 50 analogue equivalent
13 x QAM @ -10dB
= 1.3 analogue equivalent
15 x QAM256 @ -6dB = 3.8 analogue equivalent
------------------------------------------------------------------------------------------------- +
Totals 55.1 analogue equivalent channels
6.4.1 RF transmitter setup using both BC and NC RF input
Option 1
Connect broadcast analogue RF load to the BC port of the transmitter at a level of 16.6 dBmV (50 x analogue). See sample
calculation for calculated RF input level (chapter 6.1.1. Sample 3)
Broadcast port setup
1.
Set “Input AGC Mode” to OFF and click submit to apply the setting
2. Set field “Broadcast MGC” to 0 and click submit to apply the setting
3. Apply the channel load of the 50 channels analogue RF load with a level of 16.6dBmV to the transmitter.
4. Click apply to store setting at the transmitter
Narrowcast port setup
1.
Apply the QAM RF load to the NC input of the transmitter.
2. Apply the RF level of the QAM RF load to the NC port at 16.6dBmV
3. With equal RF input at the transmitter at the BC and NC port, the transmitter will automatically introduce a back
off of 0dB. Set the Narrowcast MGC to -6dB to create the 6dB RF back off between BC RF lead and NC RF load.
4. Hit apply button to store transmitter settings.