Comtech EF Data MR-S2 Installation And Operation Manual page 47

Digicast Media Router S2 Receiver CMR-5975 (MR-S2)
Device Management via User Interfaces
Polarity
The configured polarity provides the voltage supplied to the LNB or switch. The valid selections
for the MR-S2 are 13 VDC for vertical polarization and 18 VDC for horizontal polarization. The
MR-S2 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, that a DC block be installed.
Spectral Inversion
There are four supported modes of spectral inversion:
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:
DiSEqC
Enables sending and receiving DiSEqC commands as are supported in DiSEqC mode 1.2. The
valid configuration settings for DiSEqC mode are:
Switch Time
The number of seconds the unit should wait before attempting to locate the backup carrier. If set
to disabled (by setting to a value of 0 (zero)), the MR-S2 will not attempt to switch to a backup
carrier.
•
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
•
Off Both – tries non-spectral inversion first and then attempts to
automatically check spectral inversion periodically
• 20%
• 25%
•
35%
•
Off
•
Mode A
• Mode B
•
Mode C
•
Mode D
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