F Igures - Comtech EF Data CDM-760 Installation And Operation Manual

Table of Contents
CDM-760 Advanced High-Speed Trunking Modem
APPENDIX L. DYNAMIC PREDISTORTION (DPD) OPTION............................................................. L-1
L.1 Overview ............................................................................................................................ L-1
L.1.1 What is Dynamic Predistortion (DPD)? ..................................................................................... L-2
L.1.2 Predistortion ............................................................................................................................. L-3
L.1.3 Crest Factor Reduction (CFR) .................................................................................................... L-5
L.2 DPD - Operational Requirements ........................................................................................ L-6
L.3 DPD - Operational Recommendations ................................................................................. L-7
L.4 DPD Link Design .................................................................................................................. L-7
L.4.1 Commissioning and Deployment .............................................................................................. L-8
L.4.1.1 Local DPD Commissioning and Deployment ..................................................................... L-8
L.4.1.2 Remote DPD Commissioning and Deployment................................................................. L-9
L.4.1.3 Example Results .............................................................................................................. L-10
L.5 DPD - Specifications ......................................................................................................... L-11
L.6 Other Considerations ........................................................................................................ L-12
L.6.1 DPD and DoubleTalk
L.6.2 DPD and Adaptive Coding and Modulation (ACM) ................................................................. L-12
L.6.3 DPD and Automatic Uplink Power Control (AUPC) ................................................................. L-12
L.6.4 DPD Latency ............................................................................................................................ L-12
Figure 1-1. CDM-760 Advanced High-Speed Trunking Modem ................................................................ 1-1
Figure 1-2. CDM-760 Dimensional Envelope ............................................................................................ 1-4
Figure 1-3. CDM-760 Front Panel View ..................................................................................................... 1-5
Figure 1-4. CDM-760 Rear Panel View ...................................................................................................... 1-6
Figure 1-5. 70/140 MHz Input Level vs. Symbol Rate ............................................................................. 1-12
Figure 1-6. L-Band Input Level vs. Symbol Rate ...................................................................................... 1-12
Figure 2-1. Unpack and Inspect the Shipment .......................................................................................... 2-1
Figure 2-2. Install the Unit Into a Rack Enclosure ..................................................................................... 2-3
Figure 2-3. Install the Optional Rear Support Brackets Kit ....................................................................... 2-4
Figure 2-4. Install the Optional Bearingless Rack Slide Set ....................................................................... 2-6
Figure 3-1. Coaxial Connector Examples ................................................................................................... 3-1
Figure 3-2. D-Subminiature Connector Examples ..................................................................................... 3-3
Figure 3-3. CDM-760 Cabling Connections ............................................................................................... 3-4
Figure 3-4. Typical SFP Module Installation ............................................................................................ 3-10
Figure 3-5. PIIC Data Interface Slots ....................................................................................................... 3-11
Figure 3-6 Install a PIIC Data Module ...................................................................................................... 3-11
Figure 3-7. Optional High-Speed Packet Processor ................................................................................ 3-12
Figure 3-8. Chassis Ground Interface ...................................................................................................... 3-13
Figure 3-9. AC Power Interface ............................................................................................................... 3-14
Figure 3-10. Apply AC Power to the unit ................................................................................................ 3-14
Figure 3-11. Replace the AC Fuses .......................................................................................................... 3-15
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Carrier-in-Carrier ................................................................................ L-12
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Revision 4
MN-CDM760/CD-CDM760

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