Paradyne operation manual DMD15/DMD15L Strap Codes

User InterfacesDMD15/DMD15L IBS/IDR Satellite Modem

Loopbacks:	Terrestrial Loopback is performed at the Terrestrial
	Interface
IF:	IF loopback loops the IF output of the Modulator to the IF
	input of the Demodulator. If using 8PSK or 16QAM
	modulation the output power must be above –15 dB.
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
	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.
Carrier:
CW:	Causes the Modulator to output a pure carrier.
Dual:	Causes a double sideband output.
Offset:	Causes a single sideband output.
Normal:	Causes the Modulator to output normal modulation.
Pos Fir:	For manufacturer’s use only.
Neg Fir:	For manufacturer’s use only.

4.4 DMD15/DMD15L Strap Codes

The Strap Code is a quick set key that sets many of the modem parameters. For quick setup of the DMD15/DMD15L, Strap Codes are very helpful. When a Strap Code is entered, the modem is automatically configured for the code’s corresponding data rate, overhead, code rate, framing, scrambler type and modulation. An example of how to set a strap code follows:

Example: At the Front Panel <Modulator> Menu, depress ‘↓’, then move ‘→’ to the ‘Strap Code’ Submenu and enter #16. The DMD15/DMD15L will be automatically configured to the parameters shown below in the highlighted row ‘Strap Code 16’.

4-26 TM051 – Rev. 5.8