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Specifications
C.3.7
Demodulator (Reed-Solomon Codec)
Observe the following:
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C.3.8
Demodulator Spectrum Rotation
The operator can select Normal or Inverted spectrum for the Demodulator Input.
C.3.9
Receive Frequency (IF)
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C.3.10
Receive Input Power (Desired Carrier)
The modem can meet the specified BER and automatically adjust to a RX IF input power
of -30 to -55 dBm. Monitor accuracy is ± 2.5 dB.
C.3.11
Receive Input Power (Composite)
The modem can operate to its specified performance under all the following conditions:
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C.3.12
IF Input Overload
The modem will not be damaged by a continuous RX IF input of +20 dBm.
C–16
QPSK - Depth 4 (IBS, IDR, D&I)
8PSK - Depth 4 (No Overhead, IBS, D&I)
Depth 8 (Closed Network, Async)
8PSK - Depth 8 (IDR)
The range of the input IF spectrum can be selected by the operator from 50 to
180 MHz, in 1 Hz steps.
The actual value of offset from the programmed frequency is available to the
operator on the front panel as well as the remote port. The resolution of this value
is 1 Hz. Monitor accuracy is ± 10 PPM.
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.
SDM-300A Satellite Modem
Rev. 4
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