Nov 2023

It has been quite some number of years since I dealt with Modulators and Receivers, so I did struggle a little with this recently, these are some notes of the values I used, just to get a Mod/Demod setup going.

See below for the connection method between the AVP and the RX1.


The Monitor F-Type output of the AVP is connected directly to the RF input of the RX1 (RX4 is on the left). There is no up-convertor or attenuator in use.

Below is the output settings I used on the AVP Modulator.

RF Carrier ID State            On (don't confuse this with Modulation on)
Output Select                  L-Band
Output State                   On Reduced Power (we don't want to overload the RX1 input)
Output Power-up State          (Last State)

Frequency Input Mode           L-Band Frequency
L-Band Frequency               1070 MHz
Reduced L-Band Line-up Power   -5
Nominal L-Band Power           -10
L-Band Spectrum Sense          Inverted
L-Band Tilt                    0
L-Band Up-converter Frequency  2500 MHz
Upconverter Power              Off
Upconverter Reference          Of

Below is the Modulation settings I used on the AVP Modulator.

Modulation Standard            DVB-S2
Modulation State               On
Modulation                     8PSK
FEC Rate                       3/4
Frame Size                     Normal
Pilots                         Off
NCR Stamping PID               8191
Symbol Mapping Mode            Mean Power
PL Scrambling Sequence Number  0
Symbol Rate                    31.25
Roll-off Factor                20%
Bandwidth                      37.5 Mhz (Auto Calculated from the above modulation settings)