Comtech EF Data SNM-1002 - Manual (Page 12)

SNM-1002 LinkSync™ Modem Revision 2
Preface MN/SNM1002.OM
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Figures
Figure 1-1. SNM-1002 .............................................................................................................................................1–1
Figure 1-2. Typical NMS Configuration ..................................................................................................................1–2
Figure 1-3. Typical Redundancy for the Network and LinkSync Modems ..............................................................1–3
Figure 1-4. Modular Design .....................................................................................................................................1–3
Figure 1-5. Block Diagram .......................................................................................................................................1–5
Figure 1-6. Viterbi BER Performance Curves..........................................................................................................1–9
Figure 1-7. Typical Spectral Occupancy ................................................................................................................1–10
Figure 1-8. SNM-1002 Dimensional Envelope ......................................................................................................1–11
Figure 2-1. Installation of the Mounting Bracket .....................................................................................................2–3
Figure 2-2. Typical Single-Thread Installation.........................................................................................................2–4
Figure 2-3. Typical Redundant Wiring Schmetic .....................................................................................................2–6
Figure 2-2. View of Rear Panel ................................................................................................................................2–7
Figure 3-1. Front Panel View ...................................................................................................................................3–1
Figure 3-2. Keypad ...................................................................................................................................................3–3
Figure 3-3. Main Menu.............................................................................................................................................3–5
Figure 3-4. Baseband Loopback .............................................................................................................................3–18
Figure 4-1. M&C Block Diagram.............................................................................................................................4–2
Figure 4-2. Modulator Block Diagram .....................................................................................................................4–4
Figure 4-3. Demodulator Block Diagram .................................................................................................................4–9
Figure 5-1. Fault Isolation Test Setup ......................................................................................................................5–2
Figure 5-2. Typical Output Spectrum (with Noise) ..................................................................................................5–5
Figure 5-3. Typical Output Spectrum (without Noise) .............................................................................................5–5
Figure 5-4. Typical Eye Constellations ....................................................................................................................5–7
Tables
Table 1-1. Summary Specifications..........................................................................................................................1–6
Table 1-2. Environmental and Physical ....................................................................................................................1–8
Table 2-1. Rear Panel Connectors ............................................................................................................................2–4
Table 2-2. Remote Connector and Pinouts (J6) ........................................................................................................2–5
Table 3-1. LED Indicators ........................................................................................................................................3–2
Table 4-1. Modulator Specifications ........................................................................................................................4–5
Table 4-2. Demodulator Specification....................................................................................................................4–10
Table 5-1. Conversion to S/N and E
b
/N
0
Chart.........................................................................................................5–4
Table 5-2. SNM-1002 Fault Tree .............................................................................................................................5–9