Operating instructions

User Interfaces DMD20/DMD20 LBST Universal Satellite Modem
4-6 TM103 – Rev. 2.8
DVB: Per EN301-421 & En301-210
Data Rates: All Rates
Framing Type: DVB
Scrambler Type: DVB
Spectrum Mask: DVB 0.25, 0.35
Closed Net:
All possible combinations allowed, however, a DVB
setting requires the DVB network spec. Activates the
AUPC Menu.
STRAP CODE {Refer to Strap Code Guide, Appendix H}
The Strap Code is a quick set key that sets many
modem parameters. Consult the strap code guide for
available strap codes. Parameters set by strap code:
Data Rate
Inner Code Rate
Satellite Framing
Scrambler
Drop and Insert
Outer Code Rate (Reed-Solomon)
Modulation
Network Spec
IF (menu)
FREQUENCY (MHz) {50 – 90 MHz, 100 – 180 MHz, or 950 - 2050 MHz}
Allows the user to enter the Modulator IF Output
Frequency of the modem in 1 Hz increments.
UPLINK FREQ Displays the output frequency of the BUC also referred
to as Satellite uplink frequency. The user must enter the
BUC LO and OSC SIDE BAND before using this menu.
The UPLINK FREQUENCY is a calculated measurement
of both the BUC LO and OSC SIDE BAND. Once the
menus are entered correctly, the user can control the
uplink Frequency from this menu.
POWER (dBm) {0 to -25 dBm}
Allows the user to enter the Transmitter Power Level.
CARRIER {ON, OFF, AUTO, VSAT, RTS}
Allows the user to select the carrier type. Refer to
Appendix E for further information.
SPECTRUM {NORMAL, INVERTED}
Allows the user to invert the direction of rotation for
QPSK Modulation. Normal meets the IESS
Specification..