EASTAR UHP-1000 SERIES SATELLITE ROUTER
INSTALLATION AND OPERATION MANUAL, V. 2.3
(SW VERSION 2.2.9)
© ROMANTIS 2010
28
www.romantis.com
demod compensate - Compensate LNB frequency offset
This command operates only when demodulator is receiving the carrier. Current carrier frequency offset
determined by the demodulator is saved in the Offset special parameter and later is added to all frequencies
during all search operations. This allows compensation of the LO LNB deviation constant part and speedup the
search owing to the narrower search bandwidth. The command immediately restarts the carrier search with new
parameters. Offset reset to 0 takes place during entering the demod search 0 command (the search bandwidth
assigned earlier is NOT changed in this case).
demod bert qpsk|re|data - Bit error rate meter
Initiation of the bit error rate (BERT) analyzer on the demodulator. There are three BERT modes:
QPSK - bit error rate in the signal coming from satellite (prior to correction)
REED-Solomon - bit error rate that have not been corrected by Viterbi decoder
DATA - bit error rate for data at the demodulator output
Example:
REMOTE#de be qp
QPSK BERT Q-quit
+00:00:03 Eb/N0=7.2 (7.0<>7.2) BER_1s=8.0E-3 BER=8.0E-3 CRCs=0
+HH:MM:SS - Duration of the test.
Eb/No
- Current signal-to-noise ratio in decibel.
(...<>...)
- Minimum and maximum signal-to-noise ratios during the test.
BER_1sec
- Bit error rate at this instant.
BER
- Average level during the test.
Demodulator settings and statistics of operation can be displayed using ―show interface
demodulator‖ command:
REMOTE#sh in de
Demodulator interface is UP
Last U->D: never U>D transitions:0
Last D->U: +00:00:03 Counters reset: never
------------------------- Outdoor Unit --------------------------
| LNB-pwr: ON T10M: ON Offset: 0 KHz Search BW: 2000 KHz |
LNB power
- LNB power supply on/off.
T10M
- 10MHz Reference signal on TDMA Rx input
Offset
- LNB frequency offset saved by the demod compensate command
Search BW
- Carrier search bandwidth.
Profile settings
------------------------- Link profiles -------------------------
| Pr| State | Frq.KHz | Polar.| SR.KSps | FEC | SpInv | Mode |
| A | RECEIVE | 1497220 | H 18V | 2105 | AUTO | AUTO | S1 |
| B |DISABLED | 1351000 | H 18V | 300 | AUTO | AUTO | S1 |
Pr
- Profile.
State
- Current state:
RECEIVE
- Carrier is being received.
SEARCH
- Carrier search under way.
STANDBY
- Profile is on but at the moment another profile is working.
DISABLED
- Profile is off.
Frq.KHz
- Central frequency.
Polar.
- LNB polarization and supply voltage (is permitted).
SR.KSps
- Symbol rate.
FEC
- Noiseless decoder mode.
Spinv
- Spectrum inversion mode.
Mode
- DVB-S1 or DVB-S2 demodulator mode.
