Comtech EF Data DMDVR20 LBST Rev 1.1 - Manual (Page 42)

DMDVR20 LBST Satellite Modem User Interfaces
TM136 – Rev. 1.1 4-5
4.3.2 Modulator Menu Options and Parameters
NETWORK SPEC
{CLOSED NET}
The Network Spec Command sets a number of
parameters within the modem to meet a specification.
The purpose is to eliminate keystrokes and potential
compatibility problems.
Data rates not covered by a given network specification
will not be allowed. If the mode of operation is selected
after the data rate has been entered, then the data rate
must be compatible with the desired mode of operation
or the network spec will not be allowed. The following
parameters cannot be changed while the unit is in the
given mode of operation:
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
Outer Code Rate (Reed-Solomon)
Modulation
Network Spec
IF (menu)
FREQUENCY (MHz) {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 C for further information.