Comtech EF Data DMD2401/DMD2401L - Manual (Page 62)

DMD2401/DMD2401L/DMD2401 IBS/IDR Satellite Modem User Interfaces
TM065 - Rev. 3.3 4-23
Loopbacks: {Tx Terr, Rx Terr, Tx/Rx Terr, Tx BB, Rx BB, Tx/Rx
BB, IF}
Terrestrial Loopback is performed at the Terrestrial
Interface.
Tx Terr – Sends Tx Terrestrial Data to Rx Data Out.
Rx Terr – (Distant Loop) Sends received satellite data to
the Modulator for transmission to the distant end.
Tx/Rx Terr – Enables both.
Baseband Loopback is performed at the interface
between the Baseband Processor Card and the
Modem Card. This ensures Framer/Deframer
integrity.
Tx BB – Sends Tx Data to the Receive Input to the BB
Card.
Rx BB – Sends Rx Data from the Modem Card to the Tx
Data Input to the Modem Card.
Tx/Rx BB – Enables both.
IF Loopback loops the IF Output of the Modulator to the
IF Input of the Demodulator.
Carrier:
{CW, Dual, Offset, Normal}
CW - Causes the Modulator to output pure carrier.
Dual – Causes a double sideband output.
Offset – Causes a single sideband output.
Normal – Causes the Modulator to output normal
modulation.
TxForce Alrm:
{No, Yes}
Allows a Major Tx Alarm to be forced (for testing
purposes, etc.).
RxForce Alrm:
{No, Yes}
Allows a Major Rx Alarm to be forced (for testing
purposes, etc.).
Remote Port:
{Normal, Test}
Test sends a constantly looping data packet through the
Remote Port that displays “Testing…”.
LED Test:
{Normal, Test}
Allows the user to test Front Panel LED function.
4.3 Terminal Mode Control
The DMD2401 Terminal Mode Control allows the use of an external terminal or computer to
monitor and control the modem from a full screen interactive presentation operated by the modem
itself. No external software is required other than VT100 terminal emulation software (e.g.
“Procomm” for a computer when used as a terminal. The control port is normally used as an RS–
232 connection to the terminal device. The RS-232 operating parameters can be set using the
modem front panel and stored in EEPROM for future use.