Specifications

EASTAR UHP-1000 SERIES SATELLITE ROUTER
INSTALLATION AND OPERATION MANUAL, V. 2.3
(SW VERSION 2.2.9)
© ROMANTIS 2010 32 www.romantis.com
modulator tlc range 50-360 50-360 - Max/min allowed auto TX level
The levels range where TLC is allowed to control transmission signal level.
The upper limit for cases when most of transmitter power is used should be set by 1 decibel above the BUC
compression point, whereas the lower limit should be placed 8-10 decibel below the upper limit. If transmitter
power is substantially higher than the standard mode requires, the upper limit should be placed 3 to 4 dB above
the clear sky optimal value.
modulator tlc mode off|on - Automatic transmit level control
Switching automatic transmission level control on.
Modulator settings and operation statistics can be printed using the show interface
modulator‖ command:
UHP# sh in mo
Modulator interface is UP
Last U->D: never U->D transitions: 0
Last D->U: +00:00:02 Counters cleared: never
----------------------------- Modulator settings -----------------------------
Freq: 1497220 SR: 2105 SetLvl: -22.0 Max: -15.0 10M: OFF
FEC: DVB 2/3 BR: 2572 TX: ON OutLvl: -22.0 Min: -25.0 24V: OFF
------------------------------------------------------------------------------
Rate/bps: 0
LOW Packets: 0 Bytes: 0 Q_len: 0 Drops: 0
MED Packets: 0 Bytes: 0 Q_len: 0 Drops: 0
HIGH Packets: 0 Bytes: 0 Q_len: 0 Drops: 0
Freq - frequency in KHz
FEC - error correcting coder mode
SR - symbol rate
BR - user bit rate (calculated based on SR and FEC)
TX - transmit mode (ON, OFF, PURE, BALANCE, /INV, /TLC); spectrum inversion switching on
and TLC are also displayed here
SetLvl - transmit level set by the user
OutLvl - current transmit level, with TLC correction
Max - maximum permitted level for TLC
Min - minimum permitted level for TLC
10M - switching 10 MHz signal on
24V - switching BUC power supply on
Rate/Bps - current traffic rate in transmit mode
Furthermore, statistics show information on three priority packet queues. Traffic from IP-
router is fed to these queues. The first queue to be able to transmit a packet is the HIGH
queue, and if it is not empty then MED queue, and if it is empty then the LOW queue. In
the TDMA mode, prioritization is implemented on the packet fragment level, while in the
SCPC mode - on the whole packet level.
For each of the queues, shown in the display is the number of packets and bytes that have
passed through it, the queue length in bytes (this permits to judge on the overload and
delays), as well as the number of packets lost from the queue due to serious overload with
traffic. Maximum queue depth is about 700 packets.
Counters can be cleared using the ―clear counters modulator‖ command.
2.8 IP traffic processing and routing
2.8.1 SVLAN overview
UHP-1000 routers make use of a special protocol to transmit information via the satellite.
Requirements to such protocol are minimal overhead and a possibility to split and group
data streams. With the UHP-1000 routers, this protocol is named SVLAN.
SVLAN channels are similar to the VLAN notion in Ethernet but it is simpler it is just
‖pipes‖ with numbers. If you send traffic into such a pipe (SVLAN) at the modulator, then at