DMD50 Universal Satellite Modem
Appendix C
TM118 – Rev. 1.1
C-
1
Carrier Control
C
C.0 States
The transmitter will turn off the carrier output automatically when the modem determines there is
a major alarm. This is done to prevent the carrier from outputting an unknown spectrum and
possibly disturbing adjacent carriers. This automatic drop of the carrier can be overridden by
masking the alarm that is causing the fault. This will keep the modulator output spectrum
transmitting, even when the fault occurs. The following Carrier Control states are available:
Carrier
OFF
Carrier
ON
Carrier
AUTO
Carrier
VSAT
Carrier
RTS
C.1 Carrier Off
Modulator output is disabled.
C.2 Carrier On
Modulator output is turned off before reprogramming modulator functions that may alter the
output spectrum through the front panel, and the user is required to enter “Yes” to re-enable
output after the change. When using the terminal, the modulator is turned off while re-
programming modulator functions that may alter the output spectrum, and the user is required to
manually turn on the output after the reprogramming.
C.3 Carrier Auto
Modulator output is turned off before reprogramming modulator functions that may alter the
output spectrum through the front panel, but the output is automatically turned on after the
change. When using the terminal, the modulator is turned off while re-programming modulator
functions that may alter the output spectrum, and but the output is automatically turned on after
the change.
C.4 Carrier VSat
Modulator output is turned off before reprogramming modulator functions that may alter the
output spectrum through the front panel, and the user is required to enter “Yes” to re-enable
output after the change. When using the terminal, the modulator is turned off while re-
programming modulator functions that may alter the output spectrum, and the user is required to
manually turn on the output after the reprogramming (same as “Carrier On”). Additionally “VSat”
mode disables the modulators output when the modems demodulator does not have signal lock.
When signal lock returns to the demodulator, the modulator turns the carrier back on.
Summary of Contents for DMD50
Page 2: ......
Page 3: ......
Page 16: ...DMD50 Universal Satellite Modem Table of Contents TM118 Rev 1 1 xv...
Page 17: ......
Page 20: ...DMD50 Universal Satellite Modem Introduction TM118 Rev 1 1 1 3...
Page 21: ......
Page 27: ...Installation DMD50 Universal Satellite Modem 2 6 TM118 Rev 1 1...
Page 53: ...Theory of Operation DMD50 Universal Satellite Modem 3 26 TM118 Rev 1 1...
Page 97: ...User Interfaces DMD50 Universal Satellite Modem 4 44 TM118 Rev 1 1...
Page 122: ...DMD50 Universal Satellite Modem Rear Panel Interfaces TM118 Rev 1 1 5 25...
Page 123: ......
Page 132: ...DMD50 Universal Satellite Modem Maintenance and Troubleshooting TM118 Rev 1 1 6 9...
Page 133: ......
Page 158: ...DMD50 Universal Satellite Modem Technical Specifications TM118 Rev 1 1 7 25...
Page 159: ......
Page 162: ...DMD50 Universal Satellite Modem Appendix A TM118 Rev 1 1 A 3...
Page 163: ......
Page 170: ...DMD50 Universal Satellite Modem Appendix B TM118 Rev 1 1 B 7...
Page 171: ......
Page 174: ...DMD50 Universal Satellite Modem Appendix C TM118 Rev 1 1 C 3...
Page 175: ......
Page 184: ...DMD50 Universal Satellite Modem Appendix D TM118 Rev 1 1 D 9...
Page 185: ......
Page 192: ...DMD50 Universal Satellite Modem Appendix E TM118 Rev 1 1 E 7...
Page 193: ......
Page 200: ...DMD50 Universal Satellite Modem Appendix F TM118 Rev 1 1 F 7...
Page 201: ......
Page 205: ...Appendix G DMD50 Universal Satellite Modem G 4 TM118 Rev 1 1...
Page 224: ...DMD50 Universal Satellite Modem Appendix H TM118 Rev 1 1 H 19...
Page 225: ......
Page 231: ...Appendix I DMD50 Universal Satellite Modem I 6 TM118 Rev 1 1...