UHP NETWORKS SCPC User manual

SATELLITE MODEM
SCPC
USER MANUAL
SOFTWARE RELEASE 3.2
[UHP.SC32.EN]
JANUARY 2015

UHP SCPC MODEM
USER MANUAL, v3.2
© ROMANTIS 2015 2 www.uhp.net
CONTENT
ACRONYMS AND ABBREVIATIONS...................................................................................................5
INTRODUCTION ...............................................................................................................................7
Required Qualifications.............................................................................................................................7
Document Version and Applicability.........................................................................................................7
Copyright...................................................................................................................................................7
1. GETTING STARTED ................................................................................................................8
1.1 Measurement Equipment, Tools and Accessories ...................................................................8
1.2 Required Information ...............................................................................................................8
1.3 WEB-Interface...........................................................................................................................9
2. CONFIGURATION ................................................................................................................11
2.1 Configuring IP Address............................................................................................................11
2.1.1 Configuring IP Address using Telnet Access ...........................................................................12
2.2 Site Setup................................................................................................................................12
2.3 Profiles ....................................................................................................................................13
2.3.1 SCPC modem Profile ...............................................................................................................14
2.3.2 Receive and Transmit Configuration ......................................................................................15
2.3.3 Modulator Settings .................................................................................................................15
2.3.4 TLC Settings.............................................................................................................................16
2.3.5 Adaptive Modulation and Coding...........................................................................................17
2.4 Routing....................................................................................................................................17
2.5 Redundancy ............................................................................................................................19
2.5.1 Redundancy Configuration .....................................................................................................20
2.5.2 Redundancy Status Monitoring ..............................................................................................22
3. SCRIPT-BASED CONFIGURATION ........................................................................................24
4. CONFIGURATION USING OPT FILE......................................................................................26
4.1 Save Configuration as a Binary File.........................................................................................26
4.2 Binary File Configuration Load................................................................................................26
5. POINTING TO SATELLITE .....................................................................................................28
5.1 Pointing with Use of WEB-Interface .......................................................................................29
5.2 Cross Polarization Test............................................................................................................30
5.2.1 Preparation for Measurement................................................................................................30
5.3 Transmitter 1dB Compression Point Setting ..........................................................................32
6. COMMUNICATIONS ON THE MOVE (COTM)......................................................................33
6.1 OpenAMIP Protocol................................................................................................................33
6.2 COTM with use of SNMP ........................................................................................................34

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6.3 Automatic Beam Switching.....................................................................................................34
6.4 Interaction with Mobile Antenna Controller..........................................................................36
6.5 COTM working principles........................................................................................................37
7. OPERATION.........................................................................................................................38
7.1 Status Bar Statistics ................................................................................................................38
7.2 Control Panel Statistics...........................................................................................................38
7.3 Menu of Commands Statistics................................................................................................39
7.4 Troubleshooting......................................................................................................................39
7.4.1 Fault Identification..................................................................................................................40
7.4.2 Fault Fixing..............................................................................................................................40
7.4.3 Support Information ...............................................................................................................40
7.5 Example of SCPC –Fault Fixing ...............................................................................................41
7.5.1 Monitoring Demodulator Status.............................................................................................41
7.5.2 Monitoring Modulator Status.................................................................................................42
8. ROUTER FIRMWARE ...........................................................................................................43
8.1 SW Memory Banks..................................................................................................................43
8.2 Configuration of Memory Banks.............................................................................................44
8.3 Installing New SW...................................................................................................................44
8.3.1 SW Installation via WEB-Interface..........................................................................................44
8.3.2 SW Installation Applying Console Connection........................................................................45
8.4 Installed Licenses (Keys) Data.................................................................................................45
FIGURES
Figure 1 Structure of UHP Manuals...............................................................................................................7
Figure 2 Example SCPC channel structure.....................................................................................................9
Figure 3 UHP WEB interface........................................................................................................................10
Figure 4 Assigning new IP address ..............................................................................................................11
Figure 5 UHP routing table..........................................................................................................................11
Figure 6 General configuration screen........................................................................................................12
Figure 7 LNB LO labeling..............................................................................................................................13
Figure 8 BUC LO labeling .............................................................................................................................13
Figure 9 Profiles...........................................................................................................................................14
Figure 10 Profile configuration....................................................................................................................14
Figure 11 Transmit and Receive Configuration...........................................................................................15
Figure 12 Management of the modulator ..................................................................................................15
Figure 13 TLC Security Settings for Station-1..............................................................................................16
Figure 14 TLC Security Settings for Station-2..............................................................................................16
Figure 15 Transmission Level Control configuration...................................................................................16
Figure 16 ACM settings of the Station-1 .....................................................................................................17
Figure 17 ACM settings of the Station-2 .....................................................................................................17

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Figure 18 Configuration of IP route.............................................................................................................18
Figure 19 Configuration of additional static IP route..................................................................................18
Figure 20 Routing table of Station-1 ...........................................................................................................19
Figure 21 Routing table of Station-2 ...........................................................................................................19
Figure 22 1:1 redundant router connection diagram .................................................................................20
Figure 23 Assign additional IP address on main router...............................................................................21
Figure 24 Assign additional IP address on backup router...........................................................................21
Figure 25 Redundancy settings for main router .........................................................................................21
Figure 26 Redundancy settings for backup router......................................................................................21
Figure 27 Additional IP address on backup router......................................................................................22
Figure 28 Redundancy status ......................................................................................................................23
Figure 29 Configuration of TFTP server.......................................................................................................26
Figure 30 Pointing of parabolic offset antenna...........................................................................................28
Figure 31 Configuring demodulator settings ..............................................................................................29
Figure 32 Pointing monitor .........................................................................................................................29
Figure 33 Create a CrossPol profile .............................................................................................................30
Figure 34 Configure CrossPol profile...........................................................................................................30
Figure 35 Manual start of CrossPol test......................................................................................................31
Figure 36 Management of unmodulated carrier ........................................................................................31
Figure 37 COTM Station structure ..............................................................................................................33
Figure 38 Beam coverage editor .................................................................................................................34
Figure 39 Definition of the coverage...........................................................................................................35
Figure 40 COTM configurator......................................................................................................................36
Figure 41 Configuration and permission using SNMP for COTM ................................................................37
Figure 42 Status bar statistics .....................................................................................................................38
Figure 43 Control panel statistics................................................................................................................39
Figure 44 UHP demodulator statistics and configuration ...........................................................................41
Figure 45 UHP demodulator statistics and configuration...........................................................................42
Figure 46 UHP Modulator statistics and configuration...............................................................................42
Figure 48 UHP router flash memory content..............................................................................................43
Figure 49 Loading and storage of UHP router configuration......................................................................44
Figure 50 Key information for UHP router ..................................................................................................45

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USER MANUAL, v3.2
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ACRONYMS AND ABBREVIATIONS
NAME
DESCRIPTION
16APSK
16 Amplitude and Phase-shift keying or Asymmetric Phase-shift keying, (APSK), is a digital modulation scheme that conveys
data by changing, or modulating, both the amplitude and the phase of a reference signal (the carrier wave).
32APSK
32 Amplitude and Phase-shift keying or Asymmetric Phase-shift keying, (APSK), is a digital modulation scheme that conveys
data by changing, or modulating, both the amplitude and the phase of a reference signal (the carrier wave).
8PSK
8 Phase-shift keying (8PSK) is a digital modulation scheme that conveys data by changing, or modulating, the phase of a
reference signal (the carrier wave).
AGC
Automatic Gain Control.
BCH
BCH code is a multilevel cyclic variable-length digital error-correcting code used for correcting multiple random error
patterns. BCH codes may also be used with multilevel phase-shift keying whenever the number of levels is a prime number
or a power of a prime number.
BUC
Block Up-Converter (BUC) is used in the transmission (uplink) of satellite signals. It converts a band (or "block") of
frequencies from a lower frequency to a higher frequency.
Bandwidth
Bandwidth is the difference between the upper and lower frequencies in a continuous set of frequencies.
C/N
Carrier-to-noise ratio, often written as CNR or C/N, is the signal-to-noise ratio (SNR) of a modulated signal.
Carrier
Carrier is a waveform that is modulated with an input signal for the purpose of conveying information.
CCM
Constant coding and modulation. DVB-S2 mode when MODCOD is not changed during channel operation.
COTM
Communication on the move
CRTP
Compressing IP/UDP/RTP Headers for Low-Speed Serial Links.
DAMA
Demand Assigned Multiple Access. Channel establishment on demand.
Data
transmission
Data transmission.
Data rate
Data (bit) rate is the number of bits that are conveyed or processed per unit of time.
DSCP
Differentiated Services Code Point (DSCP) is a 6-bit field in the header of IP packets for packet classification purposes. DSCP
replaces the outdated IP precedence, a 3-bit field in the Type of Service byte of the IP header originally used to classify and
prioritize types of traffic
DVB
Digital Video Broadcasting (DVB) is a suite of internationally accepted open standards for digital television.
ES
Earth station
Eb/No
Eb/No (the energy per bit to noise power spectral density ratio) is a normalized signal-to-noise ratio (SNR) measure, also
known as the “SNR per bit”.
EIRP
Effective Isotropically Radiated Power
ETSI
The European Telecommunications Standards Institute (ETSI).
FEC
Forward error correction (FEC) is a system of error control for data transmission, whereby the sender adds redundant data
to its messages, also known as an error-correction code.
Frame
Digital data transmission unit (consequence of packets) of fixed length and periodicity.
Hard priority
Method of transmission queues handling when packets from lower priority queue are not transmitted until all packets
from higher priority queue are transmitted.
HTTP
Hypertext Transfer Protocol (HTTP) is an application-level protocol for distributed, collaborative, hypermedia information
systems.
HUB
Central Station of satellite network that is managing all the terminals and resources.
HW
Hardware.
ICMP
The Internet Control Message Protocol (ICMP) is used by networked devices to send error messages—indicating, for
instance, that a requested service is not available or that a host or router could not be reached.
IESS
Intelsat Earth Station Standards
IF
Intermediate Frequency is a frequency to which a carrier frequency is shifted as an intermediate step in transmission or
reception.
IFL
Connection from the indoor equipment (modem/router) to the outdoor equipment at the antenna normally involves two
inter-facility (IFL) cables.
IGMP
The Internet Group Management Protocol (IGMP) is a communications protocol used by hosts and adjacent routers on IP
networks to establish multicast group memberships.
IP
IP is the usual abbreviation for Internet Protocol.
LDPC
Low-density parity-check (LDPC) code is a linear error correcting code, a method of transmitting a message over a noisy
transmission channel, and is constructed using a sparse bipartite graph.
LNB
Low-noise block converter is the receiving converter installed at satellite antenna.
Local oscillator
Oscillator built into RF block converter (BUC or LNB) for the purpose of converting RF-IF frequencies. Value of LO is usually
written on block enclosure or in datasheet.
Long frames
DVB-S2 frames 64800 bits long (including FEC). Require slightly lower C/N than short frames.
MCPC
Multiple channels per carrier. All TDM carriers generated by UHP can be treated as MCPC. Even if they are called SCPC.
MODCOD
Modulation and coding mode.
NMS
Network Management System

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ODU
Outdoor Unit –part of earth station installed outside.
QPSK
4 Phase-shift keying (QPSK) is a digital modulation scheme that conveys data by changing, or modulating, the phase of a
reference signal (the carrier wave).
RF
Radio frequency
RF level
Absolute RF level of entire signal (carrier + adjacent carriers) expressed in dBm.
RSV
Reed–Solomon error correction is an error-correcting code that works by oversampling a polynomial constructed from the
data.
Satellite router
Satellite router is a networking device, commonly specialized hardware that forwards data packets between networks via
satellite.
SCPC
Single Channel Per Carrier
Short frames
DVB-S2 frames 16200 bits long (including FEC). Advisable to use at lower symbol rates. Produce less delay than Long
frames.
SNMP
Simple Network Management Protocol
SNR
Signal-to-noise ratio is an electrical engineering measurement defined as the ratio of a signal power to the noise power
corrupting the signal.
SNTP
Simple Network Time Protocol (SNTP) is a protocol and software implementation for synchronizing the clocks of computer
systems over packet-switched, variable-latency data networks.
SR
Symbol Rate
Star
Type of network with one central station (hub) and several peripheral stations.
Symbol rate
Symbol rate is the number of symbol changes (waveform changes) made to the transmission medium per second using a
digitally modulated signal or a line code.
SW
Software.
TDM
Time Division Multiplexing
TDMA
Time Division Multiple Access
Telnet
Telecommunication Network (Telnet) is a network protocol used on the Internet or local area networks to provide a
bidirectional interactive communications facility.
Terminal
Earth Stations (usually VSAT) operated under management of network HUB.
TFTP
Trivial File Transfer Protocol (TFTP) is a file transfer protocol, with the functionality of a very basic form of File Transfer
Protocol (FTP).
Timestamp
Time format used by UHP. Plus sign at the beginning (+HH:MM:SS or +NN d HH:MM:SS) denotes relative time from some
event or UHP start-up. If UHP has time synchronized to hub or SNTP absolute time can be displayed. Time zone affects
absolute time.
UDP
The User Datagram Protocol (UDP) is the set of network protocols used for the Internet.
UHP
Universal Hardware Platform –common name of UHP routers
USB
USB (Universal Serial Bus) is a specification to establish communication between devices and a host controller (usually
personal computers).
VLAN
A virtual LAN, commonly known as a VLAN, is a group of hosts with a common set of requirements that communicate as if
they were attached to the same broadcast domain, regardless of their physical location.
VoIP
Voice over Internet Protocol (VoIP) is a general term for a family of transmission technologies for delivery of voice
communications over IP networks such as the Internet or other packet-switched networks.
VSAT
Very Small Aperture Terminal –satellite earth station with small-size antenna (<2.5m)
WFQ
Weighted fair queuing. Method of proportional division of bandwidth between transmission queues.
X-modem
Simple file-transfer protocol

UHP SCPC MODEM
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INTRODUCTION
This document provides general guidance on operation of UHP-X000 series satellite routers, in SCPC or MCPC
modes. The document describes the system capabilities, specifications and operation rules. Additional information
about specifications, installation and operation guidelines for specific router models can be found in the GENERAL
DESCRIPTION AND INSTALLATION GUIDE for the specific router.
Required Qualifications
This manual is intended for engineering personnel operating SCPC/MCPC networks. Such specialists should have
adequate educational credentials in the field of electronics and sufficient experience and skills in data networks
administration and satellite systems.
Document Version and Applicability
UHP VSAT platform is based on the universal satellite router UHP, which is available in different fully-compatible
hardware modifications. UHP satellite router is a basic element of any network architecture and can be used in any
combinations and at any hierarchy level. Router functional capabilities and its operating modes are determined by
the installed software and its configuration.
This manual is applicable to all UHP-X000 series satellite routers with software release 3.2 or higher. When
ordering this document, please specify its ID: [UHP.SC32.EN].
Figure 1 Structure of UHP Manuals
Copyright
The content of this document is the intellectual property of Romantis Inc. (referred to below as Romantis). Copying
or quoting this description as a whole or of any part of it without a written permission from Romantis is prohibited.
Network
Engineering
TDM/TDMA
Terminal
SCPC
Modem
Hubless
TDMA
Station
UHP-1000
UHP-8000
UHP-9000
UHP-IFS
NMS
System Level
(Network engineering guide)
Hardware Level
(Installation guide and
specifications)
Service Level
(User manual)

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1. GETTING STARTED
1.1 Measurement Equipment, Tools and Accessories
A computer is required to prepare UHP satellite router for operation, to manage its configuration locally and
monitor its status. The computer needs to be equipped with a LAN interface or USB and should have the following
software installed:
Web browser;
Telnet Client (optional);
Terminal (e.g.: Hyper terminal included in OS Windows) (optional).
To connect the computer to a satellite router a USB cable with AM/BM connectors is required (not supplied).
The computer connection to UHP router via LAN interface is implemented through the Ethernet switch via a
standard Ethernet cable with RJ-45 connectors or directly via a crossover Ethernet cable (not supplied).
1.2 Required Information
This manual describes how to configure a pair of SCPC modems interacting as SCPC duplex channel. Both modems
should be based on universal UHP routers and in combination with respective RF systems and antennas. A satellite
communications channel that is received by the referenced SCPC modem is called receive channel (Rx), while a
satellite communications channel that is transmitted by the referenced SCPC modem is called transmit channel
(Tx). Each modem should be configured accordingly with use of its local console (it could be accessed remotely).
To establish the SCPC connection the following parameters are required:
Data rate or symbol rate of each channel;
Central frequencies for Tx and Rx;
Modulation and codding settings as per the link budget calculation;
IP-address and routing.
To illustrate the system configuration, the manual will use an example network with the following parameters:
Table 1 VSAT-Network Parameters (example)
#
Parameter
Station-1
Station-2
1
Symbol rate
Transmit (Tx), kSps
1667
834
Receive (Rx) , kSps
834
1667
2
Central frequencies (Ku-band)
Transmit (Tx), MHz
14317.373
14318.873
Receive (Rx) , MHz
11018.873
11017.373
3
IP-addressing
IP-address
192.168.0.1
192.168.1.1
Mask
255.255.255.0
255.255.255.0
In accordance with the diagram below (see Figure 2) Station-1 and Station-2 Ethernet-interfaces are connected to
the network with 192.168.0.0/24 and 192.168.1.0/24 addresses respectively, each network has a computer
(192.168.0.3 and 192.168.1.3) used to configure and test the hardware.
HEREINAFTER BOTH STATION-1 AND STATION-2 WILL BE REFERENCED AS “STATIONS”IN THE SECTIONS WHERE
STATION-1 AND STATION-2 HAVE SIMILAR SETTINGS.

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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

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3. Management and control panel.
Figure 3 UHP WEB interface
Menu of commands allows selecting controls for the configuration device; Status bar comprises real-time data on
UHP status, updated every 5 seconds. Management and control panel is used to configure UHP parameters as well
as to reflect its current statistics and settings.
An appropriate menu command should be selected to configure UHP parameters that have to be entered on the
Management and control panel. Any configuration changes should be applied by pressing “Apply”button and
saved to flash memory by pressing “Save config”button in the Menu of commands.
WARNING!APPLIED BUT NOT SAVED SETTINGS WILL HAVE EFFECT UNTIL THE NEXT ROUTER REBOOT ONLY.
Configuration of SCPC Station consists of five steps (see also Figure 3):
1. Station parameters configuration –Site Setup;
2. Station profile configuration –Profile;
3. Routing configuration –IP routing;
4. Configuration saving –Save Config;
5. Status review –Overview.
5
1
2
3
4
Menu of commands
Status bar
Management and control panel

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2. CONFIGURATION
A computer used for configuration of UHP router should be configured for the same network as the router. By
default the router has 10.0.0.1XX IP-address (where XX are the last two digits of the router’s serial number) with
255.255.255.0 subnet mask. When connecting to the router the computer should be assigned an IP-address within
10.0.0.1 to 10.0.0.254 range with the exception of the router’s own IP-address.
The router can be accessed by typing its IP address 10.0.0.1XX in the web browser of the computer. If the
connection is correct a WEB-page of UHP router will be displayed.
2.1 Configuring IP Address
When connection between the router and computer is established the initial UHP IP-address should be reassigned
according to the required configuration. When connected to the WEB-interface follow these steps:
Go to a tab of Menu of commands: Advanced –> IP routing;
Choose Add IP Address in the Management and control panel;
Enter the following fields and click Apply.
Figure 4 Assigning new IP address
After a new IP-address is assigned the routing table will appear as shown below (see Figure 5).
Figure 5 UHP routing table
To delete an unusable IP address choose the corresponding entry in the routing table and click Delete in the form
that will appear.
PLEASE CLICK SAVE CONFIG TO SAVE THE CHANGES IN THE CONTROL AND STATISTICS TREE
Similar IP configuration is required for the Station-2.

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2.1.1 Configuring IP Address using Telnet Access
Telnet connection may be also used to assign a new IP address. Enter the following commands in the UHP
command line:
Terminal#ip address <new UHP_IP_address> <subnet mask>
Terminal#config save –saving changes
Example:
Terminal#ip address 192.168.0.1 255.255.255.0
Terminal#config save
UHP router supports assigning several IP addresses for Ethernet interface.
The following command is used to delete an IP-address:
Terminal#ip delete address <deleted_UHP_IP-address> <subnet mask>
Terminal#config save - saving changes
2.2 Site Setup
Site setup window (see Figure 6) is used to configure the following parameters:
Name of Station - this name will appear on the left side of the Status bar and in command line as a
command prompt (e.g. Station 1#);
Geographical location of Station - not used for SCPC;
RF interface –this defines RF parameters of the Station.
To open Site Setup settings select the appropriate item in the Menu of commands.
Figure 6 General configuration screen
Receive LO
Local oscillator frequency (LO - Local Oscillator) of LNB is usually shown on its label or in its
specification. Typical values for Ku-band are 10’000’000 or 9’750’000 kHz. This value is used
to calculate L-band receive frequency by subtracting LO from the RF receive frequency.
However if spectral inversion is enabled, the receive frequency should be subtracted from
the LO value. The value of L-band receive frequency is within 950’000 –2’050’000 kHz. If LO
value in Profile settings is set as zero (by default) all receive frequencies in profiles should be
set in L-band;
Transmit LO
Local oscillator of frequency is shown on the BUC label or in its specification. Typical values
for Ku-band are 13’050’000 or 12’800’000 kHz. This value is used to calculate L-band
transmit frequency by subtracting LO from the RF transmit frequency. However if spectral
inversion is enabled, the transmit frequency should be subtracted from the LO value. The

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value of L-band transmit frequency is within 950’000 –1’750’000 kHz. If LO value is set as
zero (by default) all transmit frequencies in profiles should be set in L-band frequencies.
Figure 7 LNB LO labeling
Figure 8 BUC LO labeling
IMPORTANT! FREQUENCIES SETTING PRINCIPLE SHOULD BE THE SAME FOR ALL NETWORK ROUTERS –EITHER ACTUAL
OR ZERO LO VALUE SHOULD BE SPECIFIED
Power Receive
Turns on LNB power 18 VDC on the demodulators (see max current in the specification);
Power Transmit
Turns on BUC power 24 VDC on the modulator (see max current in the specification);
10 MHz
Turns on 10 MHz signal on modulator or TDMA demodulator;
SpInv
Spectrum inversion on RX or TX ports;
Frequency adjust
Manual frequency adjustment (used to compensate minor frequency shifts);
Carrier search bw
Defines a search range (+/- around the central frequency) in which the carrier is searched by
the demodulators. Broader range slows down the search; narrower range can result in
impossibility to achieve carrier lock.
Identification
Not used in this configuration
Once Site Setup is configured it should be applied to take effect.
2.3 Profiles
Profile is a pre-configured group of UHP settings that defines the mode of operation and the general RF
configuration. This manual describes only one configuration supported by UHP operation mode: SCPC modem.
UHP router may have multiple profiles with various modes of operations or/and different RF settings.
Command menu “Profile” displays all the configured profiles and allows modifying it or creating a new one (see
Figure 9).

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Figure 9 Profiles
Any of blank profiles (mode=”none”) can be used to create a new profile (see Figure 10).
2.3.1 SCPC modem Profile
Figure 10 Profile configuration
Define the following values to create a new profile:
Valid
Whether this profile is valid and can be used;
Autorun
Specifies automatic profile activation. Several profiles can be marked as “Autorun” and the router
will consistently try to apply all profile marked as “Autorun” until it would establish a
communication;
Mode
UHP operation mode (SCPC modem);
Timeout
Specifies the time period before the router switches to the next profile marked as “Autorun” if
current profile is unable to establish communication.
Title
Name of profile.
The following additional setting should be configured once the profile has been created:
Center frequencies for Receive and Transmit;
Symbol rates for Receive and Transmit.

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Configuration of synchronization settings;
Set up of automatic transmission level control (TLC);
Activation of Station’s modulator.
2.3.2 Receive and Transmit Configuration
Transmit and Receive configuration should be entered into TDM/SCPC TX and TDM/SCPC RX forms respectively.
Once respective form is configured it should be applied to take effect.
Figure 11 Transmit and Receive Configuration
.
2.3.3 Modulator Settings
Activation of the Station’s modulator and adjustment of its initial power (transmitted carrier level) is performed in
“Modulator”section (see Figure 12).
Figure 12 Management of the modulator
Terminal-1
Terminal-2

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Up and Down buttons allow adjusting the level manually with 1dB step. When adjusting the transmission level by
Up and Down buttons such new settings will be applied automatically without clicking the “Apply”button.
Fractional values (e.g. 25.8 dB) should be set manually.
2.3.4 TLC Settings
This section describes configuration of the automatic transmission level control of the Station. To run TLC
algorithm the maximum Station’s transmission level (Max TLC TX level) should be set. This setting is determined
either on the basis of the operator requirements for maximum permitted signal levels (max EIRP of the Station) or
on the basis of 1dB compression point. The latter is the point where the BUC amplifier goes into compression and
becomes non-linear. The value should usually be at least 1 dB lower than the transmitter compression power.
In this section the following parameters are configured:
•The maximum transmission level for own signal –Max TLC TX level;
•This parameter is being determined either on the base of the satellite operator requirements to the
permissible level of the relay signal (EIRP stations), or based on the maximum (maximum linear)
station transmission power ;
•The parameters providing the exchange safety of the information about routers transmission and
receive levels –SCPC TLC protocol settings.
Figure 13 TLC Security Settings for Station-1
Figure 14 TLC Security Settings for Station-2
The TLC Security setting form specifies the IP-address of remote Station and the respective password. The
password will be used to secure Information exchanges of current receive levels and power control messages.
Once respective form is configured it should be applied to take effect.
Desired C/N receive level on the remote Station (Desired C/N on local hub/SCPC side) should be set using TX level
control form. This level should ensure proper quality of receive for the defined MODCOD. It is recommended using
C/N values defined in the UHP specifications plus some (0.4-0.9 dB) margin.
Figure 15 Transmission Level Control configuration
TLC enable check-box activates TLC machoism. After entering the corresponding parameters it is necessary to
press Apply.

UHP SCPC MODEM
USER MANUAL, v3.2
© ROMANTIS 2015 17 www.uhp.net
2.3.5 Adaptive Modulation and Coding
Figure 16 ACM settings of the Station-1
Figure 17 ACM settings of the Station-2
The ACM settings form allows activating and configuring Adaptive Coding and Modulation for each direction of the
SCPC channel. The following parameters should be configured:
•Select maximal MODCOD admissible for the Stations as per the Link Budget calculation;
•Set the ACM C/N threshold, which defines maximal C/N degradation compared to the nominal value
before modem switches to the next lower MODCOD scheme;
•Activate ACM for the respective direction of the SCPC channel by the ACM enable check-box.
Once respective form is configured it should be applied to take effect.
With active ACM mode Stations using TLC exchange protocols to retrieve information about quality of reception on
the remote end and dynamically adjust its transmission MODCOD ensuring maximal throughput with proper
quality of reception (depends on the actual whether conditions on the remote end).
TO USE ACM IT IS NECESSARY TO CONFIGURE TLC PROTOCOL (SEE SCPC PROTOCOL SETTINGS), BECAUSE THIS
PROTOCOL IS USED FOR INFORMATION EXCHANGE ABOUT C/N VALUES BETWEEN THE ROUTERS.
2.4 Routing
UHP routers use a special SVLAN protocol to transmit information via the satellite. According to SVLAN all IP
packets arriving at the modulator should have SVLAN tags complying with configured packets classification rules.
The following may be used for classification: sender’s/recipient’s IP-address, ToS and DSCP tags, VLAN tags,
protocol type and TCP/UDP port number. The recipient’s demodulator must be configured to receive the
information with previously assigned SVLAN tags.
Table 2 Routing Scheme with SVLANs
Station
SVLAN
Number
SVLAN
Type
IP-traffic
Classification
Note
Station-1
192.168.0.1
1
Tx
192.168.1.0/24
Create default route to the network 192.168.1.0
with 255.255.255.0 mask via SVLAN 1
2
Rx
-
Allow traffic receipt from SVLAN 2
Station-2
192.168.1.1
2
Tx
0.0.0.0/0
Create default route via SVLAN 2
1
Rx
-
Allow traffic receipt from SVLAN 1.
To create routing rules:
1. Go to Advanced –> IP routing in Menu of commands;
2. Click Add TX map on the Control panel to create the outgoing route;
3. Click Add SVLAN RX map on the Control panel to create the incoming route;
4. Click Add static route on the Control panel to create a route to the IP network outside UHP Ethernet-
interface.

UHP SCPC MODEM
USER MANUAL, v3.2
© ROMANTIS 2015 18 www.uhp.net
Figure 18 Configuration of IP route
The Static route form allows adding static routes with the default gateway.
Figure 19 Configuration of additional static IP route
The following figures represent Routing tables of the Stations.
Terminal-1
Terminal-2
Route from Terminal-1 to Terminal 2
Route from Terminal-2 to Terminal 1

UHP SCPC MODEM
USER MANUAL, v3.2
© ROMANTIS 2015 19 www.uhp.net
Figure 20 Routing table of Station-1
Figure 21 Routing table of Station-2
Entries in the routing table may have the following meaning:
А–Router IP -address;
M –SVLAN outgoing route (IP map);
R –Static route;
V –Used for SVLAN receipt.
2.5 Redundancy
Station hot standby redundancy function is provided by a combination of two UHP routers with similar
configuration and similar modes of operation. Each router has to be connected to transmit and receive
paths according to the diagram below (see Figure 22).
WARNING!IF 10 MHZ REFERENCE SIGNAL IS REQUIRED FOR LNB (PLL LNB) BOTH TDMA RX INTERFACES SHOULD BE
ALSO CONNECTED TO THE RECEIVE PATH AS THERE IS NO 10MHZ REFERENCE SIGNAL ON SCPC RX INTERFACE.
The redundancy mode supports automatic switching the power and 10 MHz signals between routers. This
functionality requires that used IF splitters and combiners:
Have at least two ports;
Pass DC;
Pass 10 MHz reference signal.
This does not apply to RF equipment with other DC and 10 MHz reference signal sources.
POWER AND 10 MHZ REFERENCE SIGNALS SWITCH IS NOT SHOWN IN THE WEB INTERFACE OR IN RESPONSE TO
#SHOW INTERFACE MODULATOR TELNET COMMAND.FOR INSTANCE,IF THE ROUTER WAS INITIALLY CONFIGURED TO
POWER THE RF EQUIPMENT BUT LATER SWITCHED TO BACKUP MODE (BACKUP) AND STOPPED TO PROVIDE THE
POWER SUCH CHANGE WILL NOT BE SHOWN IN ITS STATISTICS.

UHP SCPC MODEM
USER MANUAL, v3.2
© ROMANTIS 2015 20 www.uhp.net
Every 4 seconds both routers exchange information about their status via UDP protocol. When the router gets
switched on, its status is BACKUP. The router launches a 10 sec. timer and waits for messages about the second
router’s status during this time. If it does not receive information about the status of the second router by the end
of this time, or it receives FAULT or BACKUP message from the second router, the first router switches to TRYING
mode. This is the mode in which the router activates transmission and waits for confirmation of connection by the
remote Station. If connection is established, this router switches to ACTIVE mode and informs about this mode the
second router so the latter remains in BACKUP standby mode.
PLEASE NOTE THAT SCPC REDUNDANCY MODE REQUIRES THAT SCPC TLC MODE IS ACTIVE AND RUNNING,AS FAR AS
IT IS USED TO IDENTIFY OUTAGES OF THE SCPC CONNECTION.
If both routers try to transmit a carrier simultaneously, the router with a higher serial number gets priority.
All external network devices recognize redundant UHP routers as one device. It is achieved by ensuring that only
the router in ACTIVE mode processes ARP queries. Each router should have identical IP-addressing, routing,
modulator and demodulator configuring settings.
NOTE THAT ROUTERS DO NOT CHECK IF THEIR SETTINGS ARE IDENTICAL AND IT SHOULD BE PROPERLY CONFIGURED AND
VERIFIED DURING INSTALLATION.
To monitor and operate the routers regardless of their condition an additional IP-address must be configured on
each router. This IP-address and all related traffic will belong to the respective router regardless of current
redundancy status.
Figure 22 1:1 redundant router connection diagram
2.5.1 Redundancy Configuration
To activate 1:1 redundancy of the router, the following actions are required:
1. Connect the routers as shown in the diagram in the Figure 22;
2. Ensure the same configuration of profiles and routing tables on both routers;
3. Assign an additional IP address to the main router’s Ethernet interface. This address will be used to access
the backup device. The backup router should be assigned an IP address in the same network where there
is the additional IP address of the main router.
SCPC Rx
Tx Out
TDMA Rx
SCPC Rx
Tx Out
TDMA Rx
Rx
Tx
LAN
LAN
LAN
DC pass
DC pass
DC & 10MHz pass
DC & 10MHz pass
UHP Router
Ethernet Switch
Main IP: 192.168.1.1
Add IP: 192.168.12.1
Main IP: 192.168.1.1
Add IP: 192.168.12.1
UHP Router