Comtech EF Data DMDVR20 LBST Rev 1.1 - Manual (Page 6)

DMDVR20 LBST Satellite Modem Table of Contents
TM136 – Rev. 1.0 vii
Table of Contents
ToC
Section 1 - Introduction ...............................................................................................1-1
1.0 Overview ______________________________________________________________ 1-1
1.1 Features/Options Installed at Time of Order ___________________________________ 1-2
1.1.1 Feature Upgrades ______________________________________________________ 1-2
1.1.2 Radyne Installed Options ________________________________________________ 1-2
1.1.3 Hardware Options ______________________________________________________ 1-2
1.2 Function Accessibility _____________________________________________________ 1-2
Section 2 - Installation .................................................................................................2-1
2.0 Installation Requirements__________________________________________________ 2-1
2.1 Unpacking _____________________________________________________________ 2-2
2.2 Removal and Assembly ___________________________________________________ 2-2
2.3 Mounting Considerations __________________________________________________ 2-3
2.4 Initial Configuration Check _________________________________________________ 2-3
2.5 Modulator Checkout ______________________________________________________ 2-5
2.5.1 Initial Power-Up ________________________________________________________ 2-5
2.5.2 Factory Terminal Setup __________________________________________________ 2-5
2.6 Storage________________________________________________________________ 2-5
Section 3 - Theory of Operation..................................................................................3-1
3.0 Modem Hardware________________________________________________________ 3-1
3.0.1 L-Band/IF Printed Circuit Card ____________________________________________ 3-1
3.0.2 Baseband Processing Printed Circuit Card ___________________________________ 3-2
3.0.3 Enhanced Interface Printed Circuit Card _____________________________________ 3-3
3.1 Functional Block Diagram _________________________________________________ 3-3
3.1.1 Front Panel ___________________________________________________________ 3-4
3.1.2 Baseband Processing ___________________________________________________ 3-4
3.1.3 Tx Baseband Processing ________________________________________________ 3-5
3.1.4 Rx Baseband Processing ________________________________________________ 3-5
3.2 Monitor & Control (M&C) Subsystem _________________________________________ 3-5
3.2.1 Terminal Port__________________________________________________________ 3-6