ComStream CM601, Installation And Operation Manual

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Loopback Tests 01-0799-401D 08/02 47
To perform a far data loopback:
1. Set up the CM701/CM601As in the intended operating configuration with all
loopbacks disabled.
2. From the remote unit, issue
MLB 4
or from the front panel select Config >
More > #:Modem > Modem Loopback FAR.
3. Complete the loopback process by performing steps 1 and 2 from the other
end of the satellite link.
Ensure that each modem is receiving the carrier from the satellite at an E
b
/N
0
level acceptable for anticipated link availability, as predicted by the link
analysis performed prior to installation. Typical E
b
/N
0
levels range from 6 dB
to 10 dB.
This concludes the instructions for installing and operating the Modem card. For
technical specifications and pinouts see Appendix A.