Specifications

EASTAR UHP-1000 SERIES SATELLITE ROUTER
INSTALLATION AND OPERATION MANUAL, V. 2.3
(SW VERSION 2.2.9)
© ROMANTIS 2010 29 www.romantis.com
Receive signal statistics in DVB-S mode
----------------------- Demodulator state -----------------------
| InLvl | SpI | FEC | RS | SRoff | RX_BER | Eb/N0 | RX-offset |
| -58.7 | OFF | 3/4 | LOCK | 0 | 6.0E-3 | 7.2 | -9 KHz |
Current state of the demodulator receiver:
InLvl -Common level of signal on the input. “NOSIG” for level <-85dBm
SpInv - Spectrum inversion current mode.
FEC - Viterbi decoder mode.
RS - Carrier capture. LOCK means that the carries is detected.
SR_off - Correction to the symbol rate (smb/sec). Not valid during search.
RX_BER - BER in receive mode. Not valid during search.
Eb/No - Signal-to-noise ratio in dB. Not valid during search.
RX-offset - Carrier frequency offset from the assigned value including Offset parameter. Large offsets (up to
1000 KHz) do not affect reception quality but slow down search operation.
------------------------- Data received -------------------------
Rate/bps: 0 Packets: 24394 Bytes: 493408 CRC_errors: 7612
Rate/bps - Current traffic rate at the interface in bits per second.
Packets - Number of received packets.
Bytes - Number of received bytes.
CRC_errors - Number of errors in received packets. There is a peculiarity that if the channel traffic load
is not 100%, then some channel errors do not corrupt packet data and do not cause CRC errors.
To clean counters use is made of the ―clear counters demodulator‖ command.
2.5.5 Standard sequence for operation with demodulator
When preparing to receive carrier for the first time after equipment installation:
 Connect cable to LNB.
 Switch on LNB power supply (de ln po on) if LNB does not use any other power
supply.
 Enter (check if entered already) carrier setting in profile A (frequency, polarization,
symbol rate, and mode). Set Viterbi and spectrum inversion values to auto. Check
whether profile is switched on. If it is off – switch it on (de pr a en).
 Switch profile В off to eliminate its effect on the search operation (de pr b di).
 Set search range not less than 3000 KHz (demod search 3000).
 Reset LNB offset (demod search 0). In this case search range does not change.
 If antenna is not adjusted to the satellite, adjustment can be carried out using AGC
readings (via USB console, Telnet or WWW-interface). When antenna is adjusted to
some (any) satellite the AGC readings will decrease. The lower is the reading the
more accurately antenna is adjusted. If the reading is greater than 900, check cable
and application of power supply to LNB.
 Carrier searching at 250 KSps within the bandwidth 3000 KHz (the slowest case)
takes about 30 seconds. If there is no reception and AGC is less than 900, verify
whether the antenna looks at the proper satellite.
 Make sure to receive the carrier. Demodulator will change to the UP state and will
generate a message to the console.
 Compensate frequency offset (see demod compensate command).
 Narrow search bandwidth up to 700-1000 KHz.
 Save the configuration (config save).
 You can achieve maximum sound-to-noise ratio by the antenna fine adjustment,
although it is better to perform fine adjustment of Rx/Tx antennas using transmitter