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BUC Supply Voltage
BUC Current Monitor
Tx Carrier ON Delay
BUC Monitoring
Introduction
• Standard unit has no BUC supply.
• Optional BUC Supply:
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.
o
Min/Max programmable current alarm thresholds.
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.
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
CDM-425 Advanced Satellite Modem
1–17
Revision 0
MN-CDM-425
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