Specifications

Table of ContentsTable of Contents Revision 14
DMD20/DMD20LBST Universal Satellite Modem MN-DMD20-20LBST
v
3.15.4 System Functionality and Operational Considerations..................................................... 3–29
3.15.5 DoubleTalk Carrier-in-Carrier Cancellation Process ....................................................... 3–31
3.15.6 Margin Requirements ..................................................................................................... 3–33
3.15.7 Carrier-in-Carrier Latency .............................................................................................. 3–33
3.15.8 Carrier-in-Carrier Link Design ....................................................................................... 3–33
3.15.8.1 Symmetric Data Rate Link .......................................................................................... 3–34
3.15.8.2 Asymmetric Data Rate Link ....................................................................................... 3–37
3.15.8.3 Power Limited Links .................................................................................................. 3–38
3.15.9 Carrier-in-Carrier Commissioning and Deployment ........................................................ 3–39
3.15.10 Validating Carrier-in-Carrier Performance .................................................................. 3–40
3.15.11 Operational References ............................................................................................... 3–41
3.15.12 Carrier-in-Carrier Link Budget Calculation ................................................................. 3–41
3.15.13 Estimating PSD Ratio ................................................................................................. 3–42
3.15.13.1 Estimating PSD Ratio from LST ................................................................................. 3–42
3.15.13.2 Estimating PSD Ratio from Satmaster ........................................................................ 3–43
3.15.13.3 Estimating PSD Ratio Using Spectrum Analyzer ........................................................ 3–43
3.15.14 DoubleTalk Carrier-in-Carrier Specifications .............................................................. 3–44
3.15.15 Carrier-in-Carrier Summary ........................................................................................ 3–44
3.15.16 Glossary ..................................................................................................................... 3–44
3.16 EDMAC Satellite Framing/Deframing Mode ..................................................................... 3–46
3.17 Locating the ID Code Operational Procedure .................................................................... 3–46
3.18 Strap Codes .......................................................................................................................... 3–46
CHAPTER 4. USER INTERFACES............................................................................ 4–1
4.1 User Interfaces ....................................................................................................................... 4–1
4.2 Front Panel User Interface .................................................................................................... 4–1
4.2.1 LCD Front Panel Display ................................................................................................. 4–3
4.2.2 Cursor Control Arrow Keys .............................................................................................. 4–3
4.2.3 Numeric Keypad .............................................................................................................. 4–3
4.2.4 Front Panel LED Indicators .............................................................................................. 4–4
4.3 Parameter Setup .................................................................................................................... 4–4
4.4
Front Panel Control Screen Menus ....................................................................................... 4–5
4.4.1 Main Menus ..................................................................................................................... 4–5
4.4.2 Modulator Menu Options and Parameters ......................................................................... 4–6
4.4.3 Demodulator Menu Options and Parameters ................................................................... 4–15
4.4.4 Interface Menu Options and Parameters .......................................................................... 4–20
4.4.5 Monitor Menu Options and Parameters ........................................................................... 4–25
4.4.6 Alarms Menu Options and Parameters ............................................................................ 4–28
4.4.7 System Menu Options and Parameters ............................................................................ 4–36
4.4.8 Test Menu Options and Parameters................................................................................. 4–45
4.5 Terminal Mode Control ....................................................................................................... 4–47
4.5.1 Modem Terminal Mode Control ..................................................................................... 4–47