Comtech EF Data DMDVR20 LBST Rev 1.1 - Manual (Page 48)

DMDVR20 LBST Satellite Modem User Interfaces
TM136 – Rev. 1.1 4-11
DATA (menu)
DATA RATE (bps) {Refer to Technical Specs for Data Rates}
Allows the user to set the Data Rate in bps steps via the
Front Panel Arrows or Keypad.
SYMB RATE (sps) Allows the user to view the Symbol Rate.
Maximum SR is 10 MSps
INNER
FEC LDPC:
SHORT BLOCK SIZE: LDPC {1/2, 2/3, 3/4, 3/5, 4/5, 5/6, 8/9}
Allows the user to select the Rx Code Rate and Type
SAT FRAMING {S2 NORMAL, S2 SHORT}
Allows the user to select the LDPC frame size.
TERR FRAMING {NONE, 188}
DATA
POLARITY {NONE, INV. BASEBAND, INV.TERR DATA, INV.
TERR & BASE,}
Allows the user to invert the Rx Data polarity.
PILOT SYMBOLS
{DISABLED, ENABLED}
Allows the user to turn on or off pilot symbol insertion.
Default is off.
GOLD SEQ N
{000000}
Allows the user to enter specific tap value to choose
different gold sequences for the S2 scrambler. The unit
are decimal and the maximum value allow is 2
18 -1.
ODU-LNB (menu)
LO FREQ (MHz) Allows the user to enter the LNB Local Oscillator
frequency in MHz in order for the downlink frequency to
be displayed correctly (refer to the LNB manufacturer’s
specifications).
OSC SIDE BAND {LOW SIDEBAND, HIGH SIDEBAND}
Allows the user to select the location of the LNB LO.
The user must enter the location of the LNB LO in order
for the DOWNLINK FREQUENCY to be displayed
correctly. The LNB LO can be either higher or lower in
frequency than the LNB output frequency. If the LNB LO
is higher in frequency then the user must enter HIGH
SIDEBAND.
10 MHz LNB REF {ENABLED, DISABLED}
Allows the user to enable or disable the 10 MHz BUC
reference clock.