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Operation
3.4.2.8
SDM-6000 Emulation Operation
The SDM-6000 Emulation allows the SDM-300A to be compatible with the SDM-6000
remote protocol. This modem type is used for mixing SDM-300A modems with
SDM-6000 modems that are in service, allowing the user to:
•
•
•
The SDM-6000 Emulation can be an open or closed network application. If SDM-6000
application requires the use if IDR, IBS, D&I, or ASYNC overhead, then the Overhead
PCB must be installed in the SDM-300A, and the applicable FAST option shall be
enabled using the front panel.
Refer to Table 3-11 for SDM-6000 emulation parameter setting.
Parameter
Modem Emulation
TX Data/Code Rate
TX-IF Output
RX Data/Code Rate
TX Clock Source
Buffer Clock Source
Modulator Type
Encoder Type
Demodulator Type
Decoder Type
TX Overhead Type
RX Overhead Type
Interface Type
Buffer Program
RST TX-IF Cntrl
Note: The SDM-6000 software version compatibility is displayed on the second line of the
Utility/Modem Type/Modem Emulation menu.
3–84
Add an SDM-300A to a rack of SDM-6000s with a protection switch.
Replace an SDM-6000 requiring service with SDM-300A.
Use SDM-300A as the backup modem for a rack containing a mix of SDM-300A
and SDM-6000 modems.
Table 3-11. SDM-6000 Emulation Parameter Settings
Front Panel Setting
SDM-6000
TX-V, QPSK 1/2
ON
RX-V, QPSK 1/2
TX Terrestrial
Satellite Clock
INTELSAT Open, CSC Closed, FDC
Closed, EFD Closed, SDM-51 Compatible
Viterbi or Sequential
INTELSAT Open, CSC Closed, FDC
Closed, EFD Closed
Viterbi or Sequential
None
None
EIA-422, EIA-232, V.35, G.703
Bits or Milli-Seconds
OFF or ON
SDM-300A Satellite Modem
Reference Menu
Utility-Modem Type
Configuration Modulator
Configuration Modulator
Configuration Demodulator
Configuration Interface
Configuration Interface
Utility Modulator
Utility Modulator
Utility Demodulator
Utility Demodulator
Utility Interface
Utility Interface
Utility Interface
Utility Interface
Utility Interface
Rev. 4
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