UHP SCPC MODEM
USER MANUAL, v3.2
© ROMANTIS 2015 6 www.uhp.net
Outdoor Unit – part of earth station installed outside.
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).
Absolute RF level of entire signal (carrier + adjacent carriers) expressed in dBm.
Reed–Solomon error correction is an error-correcting code that works by oversampling a polynomial constructed from the
data.
Satellite router is a networking device, commonly specialized hardware that forwards data packets between networks via
satellite.
Single Channel Per Carrier
DVB-S2 frames 16200 bits long (including FEC). Advisable to use at lower symbol rates. Produce less delay than Long
frames.
Simple Network Management Protocol
Signal-to-noise ratio is an electrical engineering measurement defined as the ratio of a signal power to the noise power
corrupting the signal.
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.
Type of network with one central station (hub) and several peripheral stations.
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.
Time Division Multiplexing
Time Division Multiple Access
Telecommunication Network (Telnet) is a network protocol used on the Internet or local area networks to provide a
bidirectional interactive communications facility.
Earth Stations (usually VSAT) operated under management of network HUB.
Trivial File Transfer Protocol (TFTP) is a file transfer protocol, with the functionality of a very basic form of File Transfer
Protocol (FTP).
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.
The User Datagram Protocol (UDP) is the set of network protocols used for the Internet.
Universal Hardware Platform – common name of UHP routers
USB (Universal Serial Bus) is a specification to establish communication between devices and a host controller (usually
personal computers).
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.
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.
Very Small Aperture Terminal – satellite earth station with small-size antenna (<2.5m)
Weighted fair queuing. Method of proportional division of bandwidth between transmission queues.
Simple file-transfer protocol
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