DVB Adapter options for DVB-S/S2
DVB-S/S2 is a standard for Satellite Television
General options
Section titled “General options”
- Frequency: carrier frequency (950-13250 MHz)
- Polarization: signal polarization. For linear polarization: Vertical, Horizontal. For circular polarization: Right, Left
- Symbolrate: symbol rate also known as the baud rate, refers to the number of signal changes per second (1000-50000 Kbaud)
LNB (Low-Noise Block) options
Section titled “LNB (Low-Noise Block) options”
- LOF1: Low sub-band, MHz
- LOF2: High sub-band, MHz
- SLOF: Sub-band range. If adapter frequency more than SLOF, than will be used LOF2 value and sends tone (22 kHz) signal to LNB to switch
- Force Tone: option to send 22 KHz tone signal
- LNB Mode: select additional LNB modes
Default options depends on the adapter frequency:
| Frequency range | LOF1 | LOF2 | SLOF |
|---|---|---|---|
| 10700 .. 13250 | 9750 | 10600 | 11700 |
| 4500 .. 4800 | 5950 | 0 | 0 |
| 3400 .. 4200 | 5150 | 0 | 0 |
| 2500 .. 2700 | 3650 | 0 | 0 |
| 950 .. 2150 | 0 | 0 | 0 |
LNB Polarization
Section titled “LNB Polarization”The LNB polarization option controls the signal received by the satellite dish. The voltage level for LNB power supply is defined by the polarization:
- 13V is for Vertical/Right polarization. Switching signal in the range of 11-14 Volts
- 18V is for Horizontal/Left polarization. Switching signal in the range of 16-20 Volts
LNB Modes
Section titled “LNB Modes”- LNB Sharing: in this mode, the LNB voltage supply and tone signal are disabled. This allows you to connect several DVB-adapters to a single converter through a passive splitter. On the splitter, only one adapter must be active; the any other adapters should be passive. All adapters on the same splitter should use the same polarization and the same sub-band (frequency greater or less than the value of slof)
- DiSEqC 1.0: digital Satellite Equipment Control is a communication protocol for use between a satellite receiver and a device such as a multi-dish switch or a small dish antenna rotor. Version 1.0 allows switching between up to 4 satellite sources
- DiSEqC 1.1: allows switching between up to 16 satellite sources
- DiSEqC Command: sends a raw command to DiSEqC
- Tone Burst: also known as mini DiSEqC. Allows switching between 2 satellite sources
- Unicable I (EN50494): provides simultaneous access to multiple LNBs over a single coaxial cable for several receivers. Version I provides access up to 8 satellite sources
- Unicable II (EN50607): provides access to up to 32 satellite sources
Advanced options
Section titled “Advanced options”
- Modulation: method used to convert digital data into an analog signal. Default: QPSK for DVB-S, PSK8 for DVB-S2
- FEC: forward error correction. Default: Auto
- Roll-Off: spectrum efficiency. Only for DVB-S2. Default: 35
- Stream ID: PLP stream ID for multistream transponders. Only for DVB-S2
