Comtech EF Data DST User Manual
Page 8
Digital Satellite Terminal System
Revision 2
Preface
MN/DST.IOM
iv
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