Comtech EF Data CDM-425, Installation And Operation Manual

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CDM-425 Advanced Satellite Modem
Revision 0
Introduction 1–17 MN-CDM-425
BUC Supply Voltage
• Standard unit has no BUC supply.
• Optional BUC Supply:
o
24VDC, 4.17 Amps maximum, 100W
o
48VDC, 3.125 Amps maximum, 150W @ 50° C (180 watts @ 30° C)
o
Supplied through Tx IF center conductor and selectable ON/OFF via M&C control.
BUC Current Monitor Min/Max programmable current alarm thresholds.
Tx Carrier ON Delay Selectable feature power on to allow internal ovenized reference to stabilize before turning on Tx
carrier. Intelligent algorithm minimizes delay time based on internal temperature at power-up.
BUC Monitoring Power level, temperature, power class, phased locked loop (PLL) lock.
Uses ND Satcom/Global VSAT Forum specification for FSK control and monitoring.
Figure 1-6. Transmit Power Spectral Density
Tx Alpha 0.05 to 0.20