Comtech EF Data CMR-5995, Инструкция по установке и эксплуатации

Страница: 59 / 136

Digicast Media Router S2 Receiver CMR-5995 (MR-S2-ASI) Revision 1
Device Management via User Interfaces MN-CMR5995-IOM
4-25
Symbol Rate
Depending on the configured mode of operation, the following symbol rates are supported:
• DVB-S – QPSK 2 to 45 Msps
• DVB-S2 – QPSK 2 to 32 Msps
• DVB-S2 – 8PSK 2 to 32 Msps
Polarity
The configured polarity provides the voltage supplied to the LNB or switch. The valid selections
for the CMR-5995 are:
•
13 VDC for vertical polarization
•
18 VDC for horizontal polarization
•
Off if LNB voltage is not required
The CMR-5995 is capable of providing up to 600mA of current in either mode of operation. It is
recommended, that if the LNB voltage is not required, either polarity be set to ‘Off’ or that a DC
block be installed.
Spectral Inversion
There are four supported modes of spectral inversion:
•
On – forces the tuner to stay with spectral inversion. The tuner will not
check for spectral inversion automatically
• Off – forces the tuner to stay without spectral inversion. The tuner will not
check for spectral inversion automatically
• On Both – tries spectral inversion first and then attempts to automatically
check spectral inversion periodically – recommended default configuration
• Off Both – tries non-spectral inversion first and then attempts to
automatically check spectral inversion periodically
LNB 22 KHz Tone
Enables or disables the LNB 22 KHz tone to the LNB for remote LNB and switch control.
Pilot
Enables or disables the Pilot for DVB-S2 mode of operation only.
Roll Off
The expected filter roll off of the carrier the receiver should be looking at. This parameter only
works for DVB-S2 mode, since DVB-S mode uses a fixed roll off of 35%.
The valid roll offs in DVB-S2 mode are:
• 20%
• 25%
• 35%
DiSEqC
Enables sending and receiving DiSEqC commands as are supported in DiSEqC mode 1.2. The
valid configuration settings for DiSEqC mode are:
•
Off
•
Mode A
•
Mode B