Comtech-ef-data DST Uživatelský manuál stáhnout pdf (Strana 8)

Digital Satellite Terminal System Revision 2

Preface MN/DST.IOM

3.5 BUC Installation .........................................................................................................................................3–6

3.5.1 Mounting Kits ..........................................................................................................................................3–6

3.5.2 Installation................................................................................................................................................3–9

3.6 Spar Mount ...............................................................................................................................................3–10

3.6.1 Ku-BUC Spar Mount, Typical NJRC ....................................................................................................3–10

3.6.2 Ku-Band Spar Mount Typical Terrasant................................................................................................3–11

3.6.3 C-Band Spar Mount, Typical .................................................................................................................3–12

CHAPTER 4. LOW NOISE BLOCK DOWN CONVERTER................................................................4–1

4.1 Description ..................................................................................................................................................4–1

4.1.1 Options.....................................................................................................................................................4–2

4.2 LO, Mix and Spectrum Settings (LNB) ....................................................................................................4–3

4.2.1 C-Band .....................................................................................................................................................4–3

4.2.2 Ku-Band...................................................................................................................................................4–4

4.3 Low Noise Block (LNB) Converter ...........................................................................................................4–5

4.4 LNB Installation .........................................................................................................................................4–7

4.4.1 LNB Tooling............................................................................................................................................4–7

4.4.2 C-Band .....................................................................................................................................................4–7

4.4.3 Ku-Band...................................................................................................................................................4–7

4.4.4 Mounting Kits ..........................................................................................................................................4–8

4.4.5 LNB Installation.......................................................................................................................................4–8

4.4.6 TRF Installation .......................................................................................................................................4–9

4.5 Cable Installation......................................................................................................................................4–10

CHAPTER 5. OPERATION ................................................................................................................. 5–1

5.1 Initial Operation .........................................................................................................................................5–1

5.1.1 Prior to Turning On Power.......................................................................................................................5–1

5.1.2 Initial Power Up – Modem Only..............................................................................................................5–2

5.2 LO, Mix and Spectrum (Inversion) Settings ............................................................................................5–3

5.3 Applying Power To The BUC....................................................................................................................5–4

TX Side Setup:............................................................................................................................5–5

5.4 Initial Operation of the Modem with the ODU and LNB .......................................................................5–5

RX Side Setup:............................................................................................................................5–5

APPENDIX A. SELECTING LNBS FOR USE WITH L-BAND MODEMS .......................................... A–1

A.1 Introduction ...............................................................................................................................................A–1

A.1.1 Comparing LNBs................................................................................................................................A–1

A.1.2 Carrier Spacing And Frequency Uncertainty......................................................................................A–2

A.1.3 Frequency Uncertainty Budget ...........................................................................................................A–3

A.1.3.1 Uncertainty For 0.02 ppm Modem and 0.02 ppm BUC .................................................................A–3

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