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f. While there are selections that can accommodate up to 22 time-slots and selections that can accommodate 16-kbps data/voice users, the most common Navy selections are the 257 and 259 formats (shown in Figure I-13). These formats allow five narrowband voice users at a 2.4-kbps data rate on the channel along with several lower data rate users. The benefit to the user is that five voice nets can be placed on one channel instead of five separate channels. These formats require ideal conditions in which burst rates can be at their highest speed. g. Adjustments to the frame format are made for different data rates and different requirements of the users. The UCC, RSSC, or JMINI control station operator always determines the frame format. Users only supply the requests for access to the channels and information (such as data rates, type of communications, length of transmissions, and disadvantaged terminals within the network) supporting the use of the time-slots. This allows the control operators to adjust the channels to support the greatest number of users with the highest quality communications slots available. I-22 Figure I-13. Typical Navy 25-kHz DAMA Assignments h. While these may be the most common frame formats used, they are not the only formats available. Frame formats can, and should, be based on the communications requirements submitted, then updated based on the quality of communications provided. When a unit has disadvantaged users (such as manpack, 20w radio with a low-look angle to the satellite) within the network, the frame format should be adjusted to provide a more robust time-slot. This may include reducing the number of time-slots available to allow for lower burst rates. The lower burst rates (19.2 and 9.6) allow for communications to be established when the burst rate of 32 does not support the majority of users.
i. For TDMA DAMA, the time-slots within the frame format for communications are assigned to a network address. This guarantees assured access to the units. The slot is used only by those terminals contacting the network address. TDMA DAMA does not allow point-to-point or conference calls since all time-slots are dedicated to network addresses as indicated in Figure I-14. In addition, use of TDMA DAMA does not allow changing frame formats based on communications problems. The time-slots are assigned and cannot be changed. 8. Slave Channels Figure I-14. Example of 25-kHz TDMA DAMA Assignments a. Slave channels capitalize on a frequency switching concept to assign services on 5-kHz and 25-kHz channels that are time-slaved to a 25-kHz DAMA control channel (Figure I-15). (1) DAMA control channel used for OW communications, ranging, and link tests. (2) DAMA slave channels used for baseband communications. (3) DAMA slave channels do not require channel control modems/radios. Figure I-15. Slave Channels for 25-kHz DAMA b. Only DAMA SAC supports slave channels; JMINI at full operational capability supports— I-23
Page 1 and 2: UHF TACSAT /DAMA MULTI-SERVICE TACT
Page 3 and 4: 1. Scope PREFACE The intent of this
Page 5 and 6: c. We encourage recommended changes
Page 7 and 8: Acquire Resources .................
Page 9 and 10: TABLES Figure III-5. AN/WSC-3 .....
Page 11 and 12: EXECUTIVE SUMMARY UHF TACSAT/DAMA M
Page 13 and 14: 1. Introduction Chapter I Overview/
Page 15 and 16: Figure I-1. UHF SATCOM Functional O
Page 17 and 18: elationship is not clearly defined.
Page 19 and 20: . Use a logical process for communi
Page 21 and 22: communications planner determines w
Page 23 and 24: Figure I-4. Long-Range (50 to 150 k
Page 25 and 26: I-13 Figure I-6. Military UHF Satel
Page 27 and 28: (a) A shared time-slot dedicated to
Page 29 and 30: sent at that time and the number of
Page 31 and 32: Figure I-10. A Segment Slots I-19
Page 33: Figure I-12. C Segment Slots e. The
Page 37 and 38: Figure I-16. Communications on 25-k
Page 39 and 40: . Voice. (1) Bandwidth (25-kHz or 5
Page 41 and 42: This reduces the number of time-slo
Page 43 and 44: Radio Item AN/PRC-117F III-2 Table
Page 45 and 46: III-4 d. AN/ARC-231. (See Appendix
Page 47 and 48: III-6 i. USC-42(V)1, 2, 3 (mini-DAM
Page 49 and 50: III-8 Table III-2. OW Key Positions
Page 51 and 52: . User requirements— (1) Azimuth
Page 53 and 54: (6) Logging out. (a) For 5-kHz DAMA
Page 55 and 56: Spectrum Manager MARFORLANT; MARFOR
Page 57 and 58: Appendix A SATELLITE CHANNEL AUTHOR
Page 59 and 60: Table A-1. Satellite Channel (Home
Page 61 and 62: Table A-1. Satellite Channel (Home
Page 63 and 64: Appendix B Information Request Code
Page 65 and 66: Table B-1. Information Request Code
Page 71 and 72: Table B-2. Configuration Codes Conf
Page 73 and 74: C-2 Option Table C-2. MIL-STD 188-1
Page 75 and 76: C-4 Table C-4. UHF SATCOM Programmi
Page 77 and 78: pointing using the SATCOM receive s
Page 79 and 80: 5. AN/PSC-117F DAMA UHF SATCOM a. U
Page 81 and 82: C-10 Table C-7. DAMA Programming Ch
Page 83 and 84: C-12 Table C-8. DAMA Net Preset Par
Page 85 and 86:
C-14 Figure C-6. DAMA Port Configur
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C-16 Figure C-7. DAMA Destination P
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h. Passive ranging and ephemeris da
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(c) Select the destination to be ca
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• ACTIVE—Service request has be
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q. Terminate 25-kHz AC DAMA calls o
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communications. Slower data rate li
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(d) Select the desired DAMA net by
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completion of the communications. P
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C-32 Figure C-12. MSG Service Call
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C-34 Figure C-14. DAMA Service Stat
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1. Line of Sight (LOS) Operations A
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k. Enter channel number (009 to 239
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GUARD LIST VIEW 1 64000 ------ ----
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(13) For DASA only, enter time requ
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Message Action A Acquisition Failed
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Message Action Aborted To:xxxx (Rea
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Table D-7. Hot Keys, 5-kHz DAMA Key
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(9) Enter configuration code, if re
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(1) Select over-the-air, if the ter
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25-kHz AD HOC DAMA SETUP GUIDE - AN
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5C/D RADIOS 1. The following are re
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Table D-8. 5-kHz DAMA Operations (S
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Table D-8. 5-kHz DAMA Operations (S
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E-2 d. Programming operating modes.
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(12) After pushing the variable pos
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d. radio. Prior to COLD START, pres
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aa. INTKG should flash. Leave as is
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1. Skyfire Operator Training Append
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The following message appears- F-2
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F-4 CI MENU LOAD PRESETS LOADING PR
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STEP 2. Rotate selector control kno
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(1) On = Activates guard receiver.
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1. Setting Up for DAMA Appendix G A
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(1) Enter *92 then depress the Ente
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Appendix H EMI CHARACTERIZATION CHE
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Appendix J CUT SHEETS The following
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DAMA Database Set up Presets Mode P
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Appendix K Prioritization Scheme Ta
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References Joint CJCSM 3122.01, Joi
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COCOM combatant command COMM commer
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IO Indian Ocean IP internet protoco
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P PAC Pacific PCC primary channel c
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USARPAC United States Army, Pacific
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attitude can be measured by the ang
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channel control orderwire channel c
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participate in a class broadcast fr
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data stream into burst-formatted da
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low power satellite A satellite wit
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preamble Consists of a carrier segm
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permit them to escape from the Sun
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waveform The combination of baseban
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COMSEC custodians, III-7 connection
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DAMA, I-7, III-6, C-20 point-to-poi
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data, I-24 data rate, I-24 disadvan
Page 195:
MARINE CORPS: PCN 144 00003 80 PIN:
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