Comtech EF Data SNM-1010L - Manual (Page 256)

SNM-1010L Data/Control Modem Revision 0
Specifications MN/SNM1010L.OM
B.3.22.9 Receive Input Power (Composite)
The modem operates to its specified performance under all the following conditions:
• The sum of all carriers is ≤ -5 dBm.
• The sum of all carriers within 10 MHz from the desired is ≤ +30 dBc.
• The sum of all carriers is ≤ +40 dBc with respect to the desired carrier for
symbol rates greater than or equal to 64 Ks/s.
• The sum of all carriers is ≤ +50 dBc with respect to the desired carrier for
symbol rates less than 64 Ks/s.
B.3.22.10 Input Overload
The modem will not be damaged by a continuous receive input of +20 dBm.
B.3.22.11 Demodulator Input Shape
The modem is set to match any of the following spectral mask specifications.
• Closed net (Comtech EF Data)
• Closed net (Comstream)
• Closed net (Fairchild compatible)
B.3.22.12 Demodulator Channel Spacing/Adjacent Carrier Performance
The modem bit error performance is degraded less than 0.5 dB with the following
receive signal:
• Two like-modulated carriers spaced 1.3 times the symbol rate from the receive
frequency, and/or 1.2 times the acquisition range, whichever is larger.
• Each adjacent carrier up to 10 dBc higher in power than the desired carrier.
• A single adjacent carrier spaced 1.4 times the symbol rate, up to +20 dBc.
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