Comtech EF Data CDM-710G Especificaciones descargar pdf (Pagina 43)

CDM-710G High-Speed Satellite Modem Revision 1

Introduction MN-CDM710G

1–17

Figure 1-7. Demodulator Input Level

1.5.3.2 CDM-710GL L-Band Demodulator

Description Requirements

Frequency Range 950 MHz to 1950 MHz in 100 Hz steps

Impedance/Connector

50 Ω/Type N Female

Return Loss 15 dB

Input Power, Minimum

-58 + 10xLog(Symbol Rate in MHz) dBm,

-58 dBm at 1 Msps, -41.5 dBm at 45 Msps

AGC Range 45 dB above minimum

Max Composite Level +30 dBc composite to desired up to +10 dBm

Acquisition Range

± 100 kHz programmable in 1 kHz steps

Acquisition Time Typical < 10 seconds, DVB-S2 Pilots On

Adaptive Equalizer Up to 3 dB tilt

BER Performance

See Table 1-4

IQ Test Point Accessible from rear panel Alarm connector

-70

-60

-50

-40

-30

-20

-10

1 10 100

Symbol Rate (Msps)

Carrier Input Level (dBm)

Maximum Level

Minimum Level

Carrier Input Level (vs) Symbol Rate

1 2 ... 38 39 40 41 42 43 44 45 46 47 48 ... 245 246

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Comtech EF Data CDM-710G Especificaciones Pagina 43