CDM-625A Advanced Satellite Modem
MN-CDM625A
Introduction
Revision 4
1–15
Output impedance
950-1950 MHz band:
50
Ω
, 19 dB minimum return loss (21 dB typical)
1950-2250 MHz band:
17dB minimum
50-180 MHz band
: 50
Ω
, or 75
Ω
16 dB minimum return loss (18 dB typical)
Output connector
950-2250 MHz band
: Type N female
50-180 MHz band
: BNC female
Clocking options
Internal, ±0.06 ppm (SCT)
External, locking over a ±100 ppm range (TT)
Loop timing (Rx satellite clock) - supports asymmetric operation - Rx and Tx data rates need not be identical
External Clock
G.703 Clock Extension mode – internal ST clock can be slaved to an external T1 or E1 G.703 signal, and a G.703
timing signal re-constituted at the distant end of the link, regardless of the actual link data rate
External TX Carrier Off
By TTL 'low' signal or external contact closure - hardware function automatically over-rides processor
BUC Reference (10 MHz):
Phase Noise
On center conductor of L-Band output connector; 10.0 MHz
±
0.06 ppm (internal reference selected)
0.0 dBm,
±
3 dB; programmable ON/OFF
Source: either Internal Modem Reference or External Reference (10 MHz)
dB/Hz
-105
10 Hz
-125
100 Hz
-138
1 kHz
-148
10 kHz
-150
100 kHz
Frequency Offset
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, PLL lock.
Uses ND Satcom/Global VSAT Forum specification for FSK control and monitoring.
Summary of Contents for CDM-625A
Page 2: ......
Page 4: ...ER CDM625A EA4 Rev...
Page 6: ...ER CDM625A EB4 Rev...
Page 8: ...ii BLANK PAGE...
Page 42: ...CDM 625A Advanced Satellite Modem MN CDM625A Preface Revision 4 xxxvi Notes...
Page 82: ...CDM 625A Advanced Satellite Modem MN CDM625A Installation Revision 4 2 6 Notes...
Page 118: ...CDM 625A Advanced Satellite Modem MN CDM625A Updating Firmware Revision 4 4 14 Notes...
Page 124: ...CDM 625A Advanced Satellite Modem MN CDM625A FAST Activation Procedure Revision 4 5 6 Notes...
Page 230: ...CDM 625A Advanced Satellite Modem MN CDM625A Front Panel Operation Revision 4 6 106 Notes...
Page 582: ...CDM 625A Advanced Satellite Modem MN CDM625A Appendix B Revision 4 B 46 Notes...
Page 638: ...CDM 625A Advanced Satellite Modem MN CDM625A Appendix F Revision 4 F 32 Notes...
Page 642: ...CDM 625A Advanced Satellite Modem MN CDM625A Appendix G Revision 4 G 4 Notes...
Page 666: ...CDM 625A Advanced Satellite Modem MN CDM625A Appendix K Revision 4 K 18 Notes...
Page 704: ...CDM 625A Advanced Satellite Modem MN CDM625A Appendix M Revision 4 M 24 Notes...
Page 712: ...CDM 625A Advanced Satellite Modem MN CDM625A Appendix M Revision 4 M 32 Notes...
Page 722: ...CDM 625A Advanced Satellite Modem MN CDM625A Appendix Q Revision 4 Q 2 Notes...
Page 738: ...CDM 625A Advanced Satellite Modem MN CDM625A Appendix R Revision 4 R 16 Notes...
Page 754: ...CDM 625A Advanced Satellite Modem MN CDM625A Appendix U Revision 4 U 6 Notes...
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Page 756: ...2114 WEST 7TH STREET TEMPE ARIZONA 85281 USA 480 333 2200 PHONE 480 333 2161 FAX...