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UHP SCPC MODEM  

USER MANUAL, v3.2

 

 

© ROMANTIS 2015

 

www.uhp.net

 

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replaces the outdated IP precedence, a 3-bit field in the Type of Service byte of the IP header originally used to classify and 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 

Summary of Contents for SCPC

Page 1: ...SATELLITE MODEM SCPC USER MANUAL SOFTWARE RELEASE 3 2 UHP SC32 EN JANUARY 2015...

Page 2: ...4 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...

Page 3: ...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 S...

Page 4: ...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...

Page 5: ...ndards 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...

Page 6: ...e 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 b...

Page 7: ...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 combin...

Page 8: ...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...

Page 9: ...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 c...

Page 10: ...figure 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...

Page 11: ...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 configurati...

Page 12: ...his 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...

Page 13: ...m 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...

Page 14: ...le 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 SCP...

Page 15: ...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 Confi...

Page 16: ...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 st...

Page 17: ...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 sate...

Page 18: ...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 Te...

Page 19: ...QUIRED 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...

Page 20: ...eved 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 N...

Page 21: ...address Figure 23 Assign additional IP address on main router Figure 24 Assign additional IP address on backup router IT IS RECOMMENDED THAT ADDITIONAL ADDRESS FOR BACKUP ROUTER IS IN THE NETWORK DIFF...

Page 22: ...gn an additional IP address of Ethernet interface on backup router This address should be the same as the main IP address of the main UHP router Figure 27 Additional IP address on backup router WHILE...

Page 23: ...ER MANUAL v3 2 ROMANTIS 2015 23 www uhp net Figure 28 Redundancy status Select Overview in Menu of commands to see the current status of the routers The information will be displayed on the Control pa...

Page 24: ...ilable via help command from the console application when the device is accessed via a USB connection or Telnet protocol See below Table 1 an example with a list of commands to configure the router lo...

Page 25: ...svlan receive 2 1 demodulator lnb power off demodulator reference off modulator inversion off modulator reference off modulator power off rf lo 10000000 13050000 profile 2 type au scpc profile 2 rx 11...

Page 26: ...FTP server s IP address on the Control panel see Figure 29 Figure 29 Configuration of TFTP server Transmit the binary file to TFTP server Go to Advanced System Save load in the Menu of commands Specif...

Page 27: ...ings will be applied WARNING CONFIGURATION FROM THE SELECTED MEMORY BANK WILL BE LOADED AS CURRENT IN SUCH A CASE ROUTER OPERATION MODE MAY CHANGE ACCORDING TO THE CONFIGURATION THEREFORE SATELLITE CO...

Page 28: ...mbled make sure that The antenna is mounted on a solid surface that will ensure its stability under wind loads The base of the antenna is securely fixed to the surface If the antenna is fixed on a ver...

Page 29: ...he bottom When any of the satellites is found increased RF level wait until the full demodulation search cycle is completed If the carrier is found and locked the search will be replaced by text and g...

Page 30: ...during the fine tuning of the antenna If required repeat stages 1 4 5 2 Cross Polarization Test 5 2 1 Preparation for Measurement After pointing the antenna to the satellite measure the cross polariz...

Page 31: ...n the Frequency field of CrossPol test profile 6 Enable the transmission when the satellite operator commands to start the measurement 7 Switch to Modulator section of CrossPol test profile Set TX on...

Page 32: ...carrier It is necessary to increase the transmission power by changing TX Level setting by 1dB Up Down buttons of modulator control can be used This procedure should be performed under supervision of...

Page 33: ...and the controller to exchange information in order to establish and keep satellite connectivity OpenAMIP messages are transmitted as ASCII characters in a readable format The message consists of one...

Page 34: ...locked carrier C N dB 10 6 2 COTM with use of SNMP Alternatively to OpenAMIP protocol UHP router may exchange data with mobile antenna controllers using SNMP protocol with the appropriate MIB The fol...

Page 35: ...a text line with parameters separated by space comma or semicolon Spaces before and after the line will be ignored Figure 39 Definition of the coverage The network string should have the following fo...

Page 36: ...le port TX control This section defines management of UHP transmission Local By setting via its HTTP telnet NMS interfaces Network By commands from the antenna controller using OpenAMIP or SNMP protoc...

Page 37: ...he management of the controller COTM enabled UHP routers have special status COTM AMIP meaning that the router establishes a connection to the controller of the antenna system and receives the current...

Page 38: ...Currently active Orange Previously active The markers indicate the following events or characteristics REBT router reboot SYST system faults a click displays the information on the current status LAN...

Page 39: ...ands Statistics Menu of commands allows the user to access the router settings and to view the status of the settings and relevant statistics The following symbols are used in the control tree folder...

Page 40: ...ion channel where the router is operating 4 Systemize possible causes of the fault 7 4 2 Fault Fixing To fix the detected and identified faults 1 Go to router settings in the Control and statistics tr...

Page 41: ...signal level The higher the value the more stable the receive signal is The level of 80 70 means that the modem cable is connected to LNB and powered on The NoSig setting value means no signal in the...

Page 42: ...f these indicators show traffic flow to the modulator output If the remote Station does not receive the carrier of the local Station the following should be performed 1 Verify the physical connections...

Page 43: ...reboots the router while working with temporary software it will start with its permanent SW from the main memory bank To implement this mechanism one bank must be specified as the main software stora...

Page 44: ...loading applying TFTP server Find TFTP server configuration settings in Advanced IP protocols TFTP section This section is accessed by going to Advanced System Save Load in Control and statistics tre...

Page 45: ...protocol 2 Run image load to the UHP Use the following commands in sequence tftp server TFTP server ip address image load tftp UhpAdvb2 sw3 3 Burn the downloaded image in one of the memory banks and...

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