EASTAR UHP-1000 SERIES SATELLITE ROUTER
INSTALLATION AND OPERATION MANUAL, V. 2.3
(SW VERSION 2.2.9)
© ROMANTIS 2010
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www.romantis.com
UHP#sh arp
10.0.0.10 - 00:14:2A:7D:95:E9
10.0.0.11 - 00:12:34:56:2D:4E
10.0.0.12 – 00:12:34:56:53:55
An IP-address and its relevant MAC-address are shown on each line.
Free entries: 241 Purge interval 600
Free entries - Number of free cells in the Table.
Purge interval - Interval between Table updates.
ARP requests: 4 ARP answers: 0
ARP requests - Number of ARP requests generated by the router.
ARP answers - Number of router answers to ARP requests from the network.
2.5
High-speed demodulator (SCPC Rx)
Demodulator of the continuous signals is intended for reception of satellite channels
transmitted by another UHP-1000 router or by a special modulator. On the physical level,
transmission format complies with DVB-S and DVB-S2 standards but the channel level is
incompatible with DVB – there is no PID conception, etc. Instead, use is made of the own
encapsulation methods which are more efficient in transmitting IP-protocol.
2.5.1 Receiving signals from satellite
To receive signal (carrier) from satellite, it is essential to know at least four parameters:
The satellite used in the network (antenna should be pointed to this satellite)
Polarization (proper polarization should be selected on in the demodulator
configuration or the receive converter on the antenna should be turned to the
required position if its polarization cannot be switched over using its supply voltage)
Carrier central frequency (enter its value in the demodulator configuration)
Carrier symbol rate (enter the value in the demodulator configuration)
Satellite channel frequencies can be in three bands:
Ku (10.7 – 12.5 GHz) – frequency at which satellite transmits the carrier
C (4 – 5 GHz) – frequency at which satellite transmits the carrier
L (950-2050 MHz) – frequency converted by the receive converter (LNB) and which
is applied to the router’s demodulator input
Reception of the signal is effected using receive converter (LNB). It performs two functions:
amplification of the weak signals and converting them to similar signals carried at a much
lower frequency (called intermediate frequency or IF). When converting the frequency,
frequency of the local oscillator (LO) is subtracted from that of the signal received by LNB
from the satellite. LO frequency of various LNBs can be 10 GHz (professional converters),
0.975 GHz and 10.7 GHz (domestic converters). LO frequency is usually written on the
converter case label or in its Manual.
There are double-frequency (wideband) converters containing two LOs with different
frequencies. These converters are switched over using frequency 22 KHz. UHP-1000 routers
do not support 22 KHz control signals and cannot switch LO in such converters. If converter
switches the LO using voltage of 13/18 V, the router will be capable of switching LO
frequency.
