Comtech EF Data SDM-309B - Manual (Page 140)

Theory of Operation SDM-309B Satellite Modem
5-5–16 MN/U-SDM309B Rev. #
5.3.2 Specifications
Demodulation Type QPSK
Frequency Range 50 to 90 MHz or 100 to 180 MHz
Frequency Select Method Synthesized
Frequency Step Size 2.5 KHz
Channel Spacing .7 Times the Data Rate
Divided by the Encoding Rate.
Input Level Desired Carrier -55 to -30 dBm
Input Overload 0 dBm max
Input Impedance 75 W (50 Optional)
Input Return Loss 20 dB minimum
Filtering Nyquist, 8 pole, 1 of 4 selectable
Image Rejection 40 dB minimum
Symbol Rate Range 9.1 to 3152 Kb/s
I/O Connector DIN - 96 pin