Comtech EF Data DMDVR20 LBST Rev 1.1 - Manual (Page 46)

DMDVR20 LBST Satellite Modem User Interfaces
TM136 – Rev. 1.1 4-9
When utilizing BUC that supports FSK, the modem will enable the
following highlighted menus. and display LO frequency as stated by the
BUC.
FSK TEST {NONE, PASSTHRU, QUERY FOR ADDRESS,
LOOPBACK, CYCLE TX ENABLE, }
(Only available when the FSK Comm is Enabled)
NONE:
This is the none FSK operational mode.
LOOPBACK:
The FSK will initiate an internal loopback test of the FSK
transmitter and receiver verifying that the modem
communication link is functioning properly.
CYCLE TX ENABLE:
The modem will initiate a test of the FSK between the
modem and BUC. The LBST will enable and disable the
BUC RF output and verify that the commands are
properly received and accepted by the BUC and the
modem. If communications are lost, LBST will initiate a
fault.
QUERY FOR ADDRESS:
The modem will initiate a FSK query requesting BUC
address.
4.3.3 Demodulator Menu Options and Parameters
NETWORK SPEC
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 mode 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:
DSS-S2
Data Rates: All Rates
Framing Type: S2 Short
Spectrum Mask: DSS 0.20, 0.25, 0.35