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1.3.2.5
Verification
Both modems include test modes and loopbacks for rapid verification of the correct functioning of
the modems. Of particular note is the IF loopback, which permits the user to perform a quick
diagnostic test without having to disturb external cabling. During the loopback, the receive
frequency configuration parameter is temporarily changed to match that of the Tx side, and an
internal RF switch connects the modulator output to the demodulator input. When normal
operation is again selected, all of the previous receive frequency is restored.
1.3.2.6
Updating Modem Firmware
Chapter 4. UPDATE FIRMWARE
Both modems store their firmware in flash memory, which allows the modems to upload firmware
downloads from an external PC once Ethernet connectivity has been established. Firmware
updates may be obtained free from CEFD via e-mail from CEFD Customer Support during normal
business hours.
1.3.3
Interoperability
1.3.3.1
Legacy Modems
The modems are compatible and interoperable with all specified SLM-5650C modes of operation
of the following legacy modems:
•
SLM-5650A
•
SLM-5650B
The remote control protocol is not backwards compatible.
Introduction
SLM-5650C / SLM-5650C-ODU Satellite Modem
1–8
Revision 1
MN-SLM-5650C
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