Specifications
UHP-1000 SATELLITE ROUTER
INSTALLATION AND OPERATION MANUAL, V. 2.5
(SW VERSION 2.5.X)
© ROMANTIS 2012 32 www.romantis.com
----------------------- Demodulator state -----------------------
| InLvl | SpI | State | Mod. | LDPC | SRoff | C/N | RX-offset |
| -46.0 | OFF | CCM | 8PSK | 5/6 | 12 | 12.5 | -19 KHz |
Current state of the demodulator receiver:
InLvl -Common level of signal on the input. “NOSIG” for level <-85dBm
SpInv - Spectrum inversion current mode.
State - Carrier capture in particular mod . CCM, ACM-LF or ACM-SF means that carrier is locked
and respective mode is identified.
Mod - Current modulation type (QPSK or 8PSK).
LDPC - Current (FEC) of LDPC decoder.
SR_off - Correction to the symbol rate (smb/sec). Not valid during search.
C/N - 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. In DVB-S2 mode each error corrupts single DVB data block (8 kbytes).
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 mode – i.e. with reference to maximum of
your carrier on the other end of the link.