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DMD2401/DMD2401L/DMD2401 IBS/IDR Satellite Modem
Loopbacks:
Carrier:
TxForce Alrm:
RxForce Alrm:
Remote Port:
LED Test:
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.
TM065 - Rev. 3.3
{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.
{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.
{No, Yes}
Allows a Major Tx Alarm to be forced (for testing
purposes, etc.).
{No, Yes}
Allows a Major Rx Alarm to be forced (for testing
purposes, etc.).
{Normal, Test}
Test sends a constantly looping data packet through the
Remote Port that displays "Testing...".
{Normal, Test}
Allows the user to test Front Panel LED function.
User Interfaces
4-23
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