Comtech-ef-data SNM-1000 User Manual Page 26
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SNM-1000 Node Control Modem Revision 3
Introduction MN/SNM1000.IOM
1-6
1.4 Specifications
This section includes the following specifications:
• General Specifications
• Environmental and Physical Specifications
• DAC
• Burst mode operating specifications
• Continuous mode operating specifications
• Bit Error Rate (BER) specifications
1.4.1 General Specifications
Table 1-1. General Specifications
Parameter Specification
Operating IF Range 50 to 180 MHz, in 1 Hz steps
Digital Data:
Burst Mode Transmit (Slotted Aloha)
TX Data Rate
Continuous Mode Receive
RX Data Rate
TDMA
19.2 kbps
TDM
19.2 kbps
Symbol Rate 19.2 kHz
Modulation QPSK
Forward Error Correction Viterbi, K=7, 1/2 rate
Data Scrambling IESS-308 (V.35), IESS-309, or None
External Reference 1, 5, 10, 20 MHz
Plesiochronous Buffer 16 bits to 256 kbps, in 16 bit steps
2 to 98 ms, in 2 ms steps
Modulator
Output Power -5 to –30 dBm, adjustable in 0.1 dB steps
Output Spurious < -55 dBc, 0 to 500 MHz (4 kHz in-band)
Output Harmonics < -55 dBc, 0 to 500 MHz (4 kHz out-of-band)
Output Spectrum Meets IESS-308/309 power spectral mask
Output Return Loss > 20 dB
Output Impedance
75 Ω (Optional: 50 Ω)
Output Frequency Stability
± 10 PPM
Data Clock Source Internal or External
External Clock: ± 100 PPM and < 5% jitter
Internal Clock: ± 10 PPM
Internal Stability
± 1 x 10
-5
- Node Control Modem 1
- Installation and O 1
- SNM-1000 3
- Procedural Steps 4
- Network Support Customer Plan 5
- Table of Contents 7
- Preface MN/SNM1000.IOM 11
- Figures 12
- About this Manual 13
- Related Documents 13
- Conventions and References 13
- Cautions and Warnings 13
- Metric Conversion 14
- Trademarks 14
- Electrical Safety 15
- Environmental 15
- Installation 16
- IMPORTANT 17
- European EMC Directive 18
- Warranty Policy 19
- Limitations of Warranty 19
- Exclusive Remedies 19
- Disclaimer 19
- Chapter 1. INTRODUCTION 21
- 1.1 Overview 22
- 1.1.1 Additional Features 22
- 1.1.2 Mode of Operation 23
- 1.2 Description 24
- 1.3 Options 25
- 1.4 Specifications 26
- 1.4.1 General Specifications 26
- Introduction MN/SNM1000.IOM 27
- 1.4.3 DAC Specification 28
- 1.6 Dimensional Envelope 31
- Chapter 2. INSTALLATION 33
- 2.2 Installation 34
- Installation MN/SNM1000.IOM 35
- 2.3 Rear Panel Connections 36
- 2.3.1 EFBUS1/2 Port (J6) 37
- 2.3.3 User Port 39
- ≥ 0 dBm 42
- Chapter 3. OPERATION 43
- 3.1.1 LED Indicators 44
- 3.1.2 Front Panel Keypad 45
- 3.2 Menu System 46
- 3.3 Front Panel Menu 47
- 3.4 OPENING SCREEN 48
- MODEM REFERENCE 51
- INTERNAL 51
- CONFIGURATION 51
- DEMODULATOR 51
- TX CLOCK PHASE 55
- EXT-CLK FREQ 55
- 1544.000 KHZ 55
- BUFFER CLOCK 56
- RX (SATELLITE) 56
- RX CLOCK PHASE 56
- B-BAND LOOP BACK 57
- BUFFER SIZE 58
- 384 BITS 58
- BUFFER CENTER 58
- 3.4.1.4 CONFIGURATION:SAVE 59
- 3.4.2.1 MONITOR:RAW BER 60
- 3.4.2.3 MONITOR:EB/NO 61
- 3.4.2.6 MONITOR:BUFFER FILL 61
- FUNCTION SELECT 62
- FAULTS/ALARMS 62
- MODULATOR 63
- + 63
- +-++ 63
- TX INTERFACE 64
- 64
- RX INTERFACE 65
- STORED FLTS/ALAMS 67
- Reed-Solomon option only 70
- UTILITY 71
- 3.4.5.1 UTILITY:MODULATOR 72
- 3.4.5.1.7 MODULATOR:TX MODE 74
- 3.4.5.2 UTILITY:DEMODULATOR 75
- 3.4.5.3 UTILITY:INTERFACE 77
- 3.4.5.4 UTILITY:NETWORK 80
- 3.4.5.4.1 NETWORK:RELEASE 80
- 3.4.5.5 UTILITY:SYSTEM 81
- 3.4.5.5.1 SYSTEM:TIME/DATE 81
- 3.4.5.5.4 SYSTEM:REMOTE TYPE 82
- MASTER RESET 86
- HARD/SOFT 86
- 3.4.5.6 UTILITY:MODEM TYPE 87
- MODEM OPTIONS 89
- 3.5 User Port Operation 92
- 3.6.1 User Port Modem 93
- 3.6.2 Remote Site Modem 93
- 3.7 SNM-1000 Commands 94
- 3.7.1 Character Set 94
- 3.7.3 Message Structure 94
- 3.7.3.1 Prefix 94
- 3.7.3.2 Message Body 95
- 3.7.3.3 End Character 95
- 3.7.3.4 Case Sensitivity 95
- 3.7.3.5 Delimiters 95
- 3.7.3.6 End Character 95
- 3.7.3.7 Queries 96
- 3.7.4 Node Address (NA) 96
- 3.7.4.1 Command Format 96
- SNM-1000 transmit power 98
- 3.7.12 SNM-1000 Mode (MD) 100
- 3.7.12.1 Command Format 100
- 3.7.13.1 Help Screen 101
- 3.7.13.2 Flash Updates 101
- 3.7.13.6 Ram Test 102
- 3.7.13.3 PDREM Ram 102
- 3.7.13.4 Area1 Defaults 102
- 3.7.13.5 Area2 Defaults 102
- 3.7.15.1 Command Format 104
- 3.7.16 Channel Type (CT) 104
- 3.7.16.1 Command Format 104
- 3.7.17.1 Command Format 105
- 3.7.18 Data Call 106
- 3.7.18.1.1 Command Format 106
- Operation MN/SNM1000.IOM 107
- 3.7.18.2.1 Command Format 108
- 3.7.19 Terminate (TE) 108
- 3.7.19.1 Command Format 108
- 3.7.20.1 Command Format 109
- 3.7.20.3 Example 110
- 3.7.21.1 Command Format 111
- 3.7.22.1 Command Format 112
- 3.7.23.1 Command Format 113
- 3.7.24.1 Command Format 114
- 3.7.25.1 Command Format 115
- 3.7.26.1 Command Format 116
- 3.7.27 Port Redirection 116
- 3.7.28.1 Command Format 117
- (part of J1) 120
- CONNECTOR 120
- 4.1.1 Specifications 121
- 4.1.2 Theory of Operation 121
- 4.1.2.1 User Port 121
- 4.1.4 Monitor and Control 122
- 4.1.5 Non-Volatile Memory 123
- 4.1.6 User Port 123
- 4.2 Modulator 124
- 4.2.1 Theory of Operation 126
- 4.2.1.1 Burst Mode 126
- 4.2.2.1 QPSK Encoding 127
- 4.3 Demodulator 128
- 4.3.1 Theory of Operation 129
- 4.3.1.1 Continuous Mode 129
- Chapter 5. MAINTENANCE 131
- 5.1.1 System Faults/Alarms 132
- Maintenance MN/SNM1000.IOM 133
- 5.1.2 Faults/Alarms Display 136
- 5.1.3 Faults/Alarms Analysis 136
- 5.1.3.1 Modulator Faults 137
- 5.1.3.1.1 Modulator Checkout 138
- 5.1.3.2 Demodulator Faults 141
- WITH NOISE 143
- WITHOUT NOISE 143
- Appendix A. REMOTE CONTROL 149
- OPERATION 149
- A.2.1 Character Set 150
- A.2.3 Message Structure 150
- Command: 152
- is added to the 152
- (MPO_) 152
- A.5.1 Interface Buffer Size 158
- A.6.1 Modem Type Commands 160
- A.7 Configuration Status 160
- Modulator Output Power 161
- A.7.1 Modem Faults Status 163
- A.8 Stored Faults 168
- A.9 Unsolicited Responses 177
- A.9.1 Messages from NMS 177
- A.9.2 List of Cause Codes 178
- METRIC CONVERSIONS 183
- Units of Length 183
- Temperature Conversions 183
- Units of Weight 183
- 480 • 333 • 2200 PHONE 184
- 480 • 333 • 2161 184
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