Comtech EF Data MIDAS 4 System and Design - Manual (Page 103)

System and Design Manual, Revision 2
Traffic Node 6–5
Note: Comtech EF Data considers the IDC-150D, SDM-100, -140, -150, -300,
and -6000 are obsolete, contact Customer Support if this presents a problem.
Comtech EF Data network supported modems and standard modems include,
but not limited to:
•
SDM-300A/300L
• CDM-550/550T
•
SDM-2020 Mod/Demod
• CDM-600
•
SDM-8000
• CiM-550
• CiM-300L
B B u u i i l l t t - - i i n n S S e e l l f f - - T T e e s s t t
Comtech EF Data’s unique built-in self-test feature allows the SNM-1000 to
initiate a bit error rate (BER) measurement on traffic channel modems that
support BIST without the use of expensive noise generators and BER test
equipment. The built-in self test:
• Provides fully functional modem testing with noise
• Returns pass or fail results
• Establishes modem confidence
• Eliminates BER test equipment
When commanded to the self-test mode through, the SNM-1000, the SDM-
300A disables the transmit and receive IF ports and internally tests
modulator, demodulator, and interface functions using BER measurement.
The BER measurement is achieved by an internal IF noise generator and
BER test equipment built into the SDM-300A.
The built-in self-test mode operates for less than 30 seconds, and returns a
“Pass” or “Fail” test result. If desired, this feature can be enabled for automatic
execution at power On.