UHP SCPC MODEM
USER MANUAL, v3.2
© ROMANTIS 2015
9
www.uhp.net
Figure 2 Example SCPC channel structure
A SCPC carrier of 2 MHz
bandwidth
(
symbol rate
1667
KSps with
roll-off=1.2) is used to transmit data
from
the
Station
-1
to
the
Station-2, while
another SCPC carrier of 1 MHz
bandwidth
(
symbol rate
834
KSps
with
roll-off =
1.2) is used to transmit data from the Station-2 to Stations-1.
Bit rate and symbol rate are converted using
the following formula
:
SR =
BR
MOD ∗ FEC
where,
SR – symbol rate;
BR – bit rate;
MOD – modulation type (1 – BPSK, 2 – QPSK, 3 – 8PSK, 4 – 16APSK);
FEC – forward error correction rate.
The description below shows the procedure to establish SCPC connection between the Station-1 and Station-2:
Radio frequency channel configuration;
Transmission Level Control (TLC) configuration;
Adaptive Coding and Modulation (ACM) configuration;
Routing configuration;
Equipment redundancy mode configuration;
Pointing the antenna to the satellite;
Troubleshooting during UHP-routers operation;
SW and router settings storage/updating.
1.3
WEB-Interface
UHP-router WEB-interface (see Figure 3) is split into three areas:
1.
Menu of commands;
2.
Status bar;
SCPC
1667 kSps
SCPC
834 kSps
953500
952500
950500
951000
951500
Terminal #1
192.168.0.1
Terminal #2
192.168.1.1
192.168.1.0/24
192.168.0.0/24
Console
192.168.0.3
MHz
Gateway
192.168.0.2
Internet
