Radyne DMD50 User manual

Part Number MN-DMD50 Revision 4
Comtech EF Data is an
AS9100Rev B/ ISO9001:2000 Registered Company
IMPORTANT NOTE: The information contained in this document supersedes all previously
published information regarding this product. This manual is subject to change without prior notice.
DMD50
Universal Satellite Modem
Installation and Operation Manual

ER-MNDMD50-EA4 Rev - PLM C-0026227
Errata A for MN-DMD50 Rev 4
Comtech EF Data Documentation Update
Subject: Chapter 7, Technical Specifications
Errata Part Number: ER-MNDMD50-EA4 (Errata documents are not subject to revision.)
PLM CO Number: C-0026227
Comments: See attached page(s). The new information will be included in the next released
revision of the manual.

ER-MNDMD50-EA4 Rev - PLM C-0026227
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MN-DMD50 Revision 4 7–1
Chapter 7. TECHNICAL
SPECIFICATIONS
7.1 Data Rates
Refer to Section 7.21
7.2 Modulator
Modulation BPSK, QPSK, OQPSK, 8PSK, 8QAM, 16QAM
IF Tuning Range 50 to 90, 100 to 180 MHz in 1 Hz Steps
L-Band Tuning Range 950 to 2050 MHz in 1 Hz Steps
Impedance IF, 75 Ohm (50 Ohm Optional)
L-Band, 50 Ohm
Connector BNC, 75 Ohm
SMA, 50 Ohm, L-Band
Return Loss IF, 1.5:1
L-Band, 2.0:1
Output Power 0 to -25 dB
Output Stability IF, ±0.5 dB Over Frequency and Temperature
L-Band, ±1.0 dB Over Frequency and Temperature
Output Spectrum Meets IESS 308/309/ 310 Power Spectral Mask
Spurious -55 dBc In-Band (50 to 90 MHz, 100 to 180 MHz, 950 to 2050
MHz)
-45 dBc Out-of-Band
On/Off Power Ratio >60 dB
Scrambler OM-73, CCITT V.35 or IBS
FEC Viterbi, {1/2, 3/4, 7/8, None} K = 7
Sequential {1/2, 3/4, 7/8}
CSC {3/4}
Trellis (8PSK) {2/3}
DVB VIT {1/2, 2/3, 3/4, 5/6, 7/8}
DVB Trellis {2/3, 3/4, 5/6, 7/8, 8/9}
Turbo Product Code (Optional) – (SuperCard ONLY)
Turbo (BPSK) {21/44,5/16}
Turbo (OQPSK/QPSK) {1/2, 3/4, 7/8} <20Mbps
Turbo (8PSK/16QAM) {3/4, 7/8} <20Mbps
Turbo (OQPSK/QPSK) {.750, .875} >20Mbps
Turbo (8PSK) {.750, .875}>20Mbps
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DMD50 Universal Satellite Modem Technical Specifications
MN-DMD50 Revision 4 7–2
Legacy Turbo Rates {0.495, 0.793} < 5Mbps
LDPC/TPC (Optional) <20Mbps
LDPC (BPSK) {1/2}
LDPC (OQPSK/QPSK) {1/2, 2/3, 3/4}
LDPC (8PSK/8QAM) {2/3, 3/4}
LDPC (16QAM) {3/4}
Turbo (BPSK) {21/44}
Turbo (QPSK/OQPSK) {1/2, 2/3, 3/4, 7/8}
Turbo (8QAM/8PSK) {2/3, 3/4, 7/8}
Turbo (16QAM) {3/4, 7/8}
Outer Encoder Options Reed-Solomon INTELSAT (DVB Optional)
Custom (N, K) Reed-Solomon
Data Clock Source Internal, External, Rx Recovered
Internal Stability 5 x 10-8
7.3 Demodulator
Demodulation BPSK, QPSK, OQPSK, 8PSK, 8QAM, 16QAM
IF Tuning Range 50 to 90, 100 to 180 MHz in 1 Hz Steps
L-Band Tuning Range 950 to 2050 MHz in 1 Hz Steps
Impedance IF, 75 Ohm (50 Ohm Optional)
L-Band, 50 Ohm
Connector BNC, 75 Ohm
SMA, 50 Ohm, L-Band
Return Loss IF, 1.5:1
L-Band, 2.0:1
Spectrum Meets INTELSAT IESS 308/309/310 Compliant
Input Level -55 to +10 dBm
Total Input Power +5 dBm or +40 dBc (the Lesser)
FEC Viterbi, {1/2, 3/4, 7/8, None} K = 7
Sequential {1/2, 3/4, 7/8}
CSC {3/4}
Trellis (8PSK) {2/3}
DVB VIT {1/2, 2/3, 3/4, 5/6, 7/8}
DVB Trellis {2/3, 3/4, 5/6, 7/8, 8/9}
Turbo Product Code (Optional) – (SuperCard ONLY)
Turbo (BPSK) {21/44,5/16}
Turbo (OQPSK/QPSK) {1/2, 3/4, 7/8} <20Mbps
Turbo (8PSK/16QAM) {3/4, 7/8} <20Mbps
Turbo (OQPSK/QPSK) {.750, .875} >20Mbps
Turbo (8PSK) {.750, .875}>20Mbps
Legacy Turbo Rates {0.495, 0.793} < 5Mbps
LDPC/TPC (Optional) <20Mbps
LDPC (BPSK) {1/2}
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DMD50 Universal Satellite Modem Technical Specifications
MN-DMD50 Revision 4 7–3
LDPC (OQPSK/QPSK) {1/2, 2/3, 3/4}
LDPC (8PSK/8QAM) {2/3, 3/4}
LDPC (16QAM) {3/4}
Turbo (BPSK) {21/44}
Turbo (QPSK/OQPSK) {1/2, 2/3, 3/4, 7/8}
Turbo (8QAM/8PSK) {2/3, 3/4, 7/8}
Turbo (16QAM) {3/4, 7/8}
Decoder Options Reed-Solomon INTELSAT (DVB Optional)
Custom (N, K) Reed-Solomon
Descrambler OM-73, CCITT V.35 or IBS
Acquisition Range Programmable ±1 kHz to ± 255 kHz
Reacquisition Range Programmable ±1 Hz to 25000 Hz
Sweep Delay Value 0 to 6000 seconds in 100 msec Steps
7.4 Plesiochronous Buffer
Size 0 msec to 64 msec
Centering Automatic on Underflow/Overflow
Centering Modes IBS: Integral Number of Frames
IDR: Integral Number of Multi-Frames
Clock Transmit, External, Rx Recovered or SCT (Internal)
7.5 Monitor and Control
Ethernet 10 Base-T/Web Browser, Remote RS-485/Terminal RS-232/DMD15 Protocol
Compatible
7.6 DMD50 Drop and Insert (Optional)
Terrestrial Data 1.544 Mbps or 2.048 Mbps, G.732/733
Line Coding AMI or B8ZS for T1 and HDB3 for E1
Framing D4, ESF and PCM-30 (PCM-30C) or
PCM-31 (PCM- 31C) for E1
Time Slot Selection n x 64 Contiguous or Arbitrary Blocks for Drop or Insert.
Time Slots TS1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 31
Data Rates 64, 128, 192, 256, 320, 384, 512, 640,
768, 960, 1024, 1280, 1536, 1920 Kbps
Efficient D&I Closed Network, Satellite Overhead 0.4%
Time Slots 1-31 Any combination
7.7 Terrestrial Interfaces
RS530, DVB ASI/SPI, HSSI, Ethernet 4 Port 10/100 Base-T,
GiGE 3 Port 10/100/1000 Base-T
7.8 IDR/ESC T2/E2 Interface (Optional)
G.703 T1 (100) 1.544 Mbps, 100 Ohm Balanced, AMI and B8ZS
G.703 E1 2.048 Mbps, 75 Ohm Unbalanced and 120 Ohm Balanced, HDB3
ER-MNDMD50-EA4 Rev -

DMD50 Universal Satellite Modem Technical Specifications
MN-DMD50 Revision 4 7–4
G.703 T2 (100) 6.312 Mbps, 75 Ohm Unbalanced and 110 Ohm Balanced, B8ZS
and B6ZS
G.703 E2 8.448 Mbps, 75 Ohm BNC, Unbalanced, HDB3
7.9 IDR/ESC T3/E3/STS1 Interface (Optional)
G.703 T1 (DSX1) 1.544 Mbps, 100-Ohm Balanced, AMI and B8ZS
G.703 E1 2.048 Mbps, 75-Ohm BNC, Unbalanced and 120-Ohm
Balanced, HDB3
G.703 T2 (DSX2) 6.312 Mbps, 75-Ohm BNC, Unbalanced and 110-Ohm
Balanced, B8ZS and B6ZS
G.703 E2 8.448 Mbps, 75-Ohm BNC, Unbalanced, HDB3
G.703 E3 34.368 Mbps, 75-Ohm BNC, Unbalanced
G.703 T3 44.736 Mbps, 75-Ohm BNC, Unbalanced
G.703 STS1 51.84Mbps, 75-Ohm BNC, Unbalanced
7.10 IBS/Synchronous Interface (Standard)
RS-422/-530 All Rates, Differential, Clock/Data, DCE
ITU V.35 All Rates, Differential, Clock/Data, DCE
RS-232 (DCE up to 200 Kbps)
7.11 High-Speed Serial Interface (HSSI)
HSSI: HSSI, Serial, 50-Pin SCSI-2 Type Connector (Female)
7.12 ASI
ASI: ASI, Serial, 75 Ohm BNC (Female)
RS-422 Parallel: DVB/M2P, Parallel, RS-422, DB-25 (Female)
ASI: ASI, Serial, 75 Ohm BNC (Female)
LVDS Parallel: DVB/M2P, Parallel, LVDS, DB-25 (Female)
7.13 DVB/M2P
DVB/M2P: DB-25 Female Connector. It complies with RS-422 Electrical
Specifications.
7.14 Ethernet Data Interface (Optional)
Ethernet Data Interface Four RJ-45, Auto-Crossover, Auto-Sensing, 10/100 Ethernet
Data Ports. Complies with IEEE 802.3 and IEEE 802.3u.
7.15 Gigi Ethernet Data Interface (Optional)
Ethernet Data Interface Three RJ-45, Auto-Crossover, Auto-Sensing, 10/100/1000
Ethernet Data Ports. Complies with IEEE 802.3 and IEEE
802.3u.
ER-MNDMD50-EA4 Rev -

DMD50 Universal Satellite Modem Technical Specifications
MN-DMD50 Revision 4 7–5
7.16 HSSI / G703 T2/E2 Max
HSSI High-Speed Serial Interface, 50-pin SCSI-2 Type Connector
(Female)
G.703 T1 (DSX1) 1.544 Mbps, 100-Ohm Balanced, AMI and B8ZS
G.703 E1 2.048 Mbps, 75-Ohm Unbalanced and 120-Ohm Balanced,
HDB3
G.703 T2 (DSX2) 6.312 Mbps, 75-Ohm Unbalanced and 110-Ohm Balanced,
B8ZS and B6ZS
G.703 E2 8.448 Mbps, 75-Ohm BNC, Unbalanced, HDB3
Note: Does not support backward alarms
7.17 HSSI / G703 T3/E3/STS1 Max
HSSI High-Speed Serial Interface, 50-pin SCSI-2 Type Connector
(Female)
G.703 T1 (DSX1) 1.544 Mbps, 100-Ohm Balanced, AMI and B8ZS
G.703 E1 2.048 Mbps, 75-Ohm Unbalanced and 120-Ohm Balanced,
HDB3
G.703 T2 (DSX2) 6.312 Mbps, 75-Ohm Unbalanced and 110-Ohm Balanced,
B8ZS and B6ZS
G.703 E2 8.448 Mbps, 75-Ohm BNC, Unbalanced, HDB3
G.703 E3 34.368 Mbps, 75-Ohm BNC, Unbalanced
G.703 T3 44.736 Mbps, 75-Ohm BNC, Unbalanced
G.703 STS1 51.84Mbps, 75-Ohm BNC, Unbalanced
Note: Does not support backward alarms
7.18 HSSI /ETHERNET
HSSI HSSI, High-Speed Serial Interface, 50-pin SCSI-2 Type
Connector (Female)
Ethernet Data Interface Four RJ-45, Auto-Crossover, Auto-Sensing, 10/100 Ethernet
Data Ports. Complies with IEEE 802.3 and IEEE 802.3u.
7.19 Environmental
Prime Power 100 to 240 VAC, 50 to 60 Hz, 250 Watts Maximum
48 VDC (Optional)
Operating Temperature 0 to +50°C, 95% Humidity, Non-Condensing
Storage Temperature -20 to 70°C, 99% humidity, Non-Condensing
7.20 Physical
Size 19” W x 19.25” D x 1.75” H
(48.26 x 48.89 x 4.45 cm)
Weight 6.5 Pounds (3.0 Kg)
ER-MNDMD50-EA4 Rev -

DMD50 Universal Satellite Modem Technical Specifications
MN-DMD50 Revision 4 7–6
7.21 DMD50 Data Rate Limits
7.21.1 Non-DVB
Modulation Code Rate Min Data Rate Max Data Rate Option Card
BPSK NONE 4800 10000000
BPSK VIT 1/2 2400 10000000
BPSK VIT 3/4 3600 10000000
BPSK VIT 7/8 4200 10000000
BPSK SEQ 1/2 2400 2048000
BPSK SEQ 3/4 3600 2048000
BPSK SEQ 7/8 4200 2048000
BPSK TPC 21/44 2400 4772727 Supercard
BPSK TPC 3/4 4800 7500000 Supercard
BPSK TPC 7/8 4800 8750000 Supercard
BPSK TPC .495 2376 4950000 Supercard
BPSK TPC .793 3806 7930000 Supercard
BPSK TPC 21/44 18000 477000 LDPC/TPC Card
BPSK LDPC 1/2 18000 6250000 LDPC/TPC Card
QPSK NONE 9600 20000000
QPSK VIT 1/2 4800 20000000
QPSK VIT 3/4 7200 20000000
QPSK VIT 7/8 8400 20000000
QPSK SEQ 1/2 4800 2048000
QPSK SEQ 3/4 7200 2048000
QPSK SEQ 7/8 8400 2048000
QPSK TPC 1/2 4582 9545454 Supercard
QPSK TPC 3/4 7200 15000000 Supercard
QPSK TPC 7/8 8400 17500000 Supercard
QPSK TPC .750 20000001 39000000 Supercard
QPSK TPC .875 20000001 45500000 Supercard
QPSK TPC .495 4752 6312000 Supercard
QPSK TPC .793 7612 6312000 Supercard
QPSK LDPC 1/2 18000 10000000 LDPC/TPC Card
QPSK LDPC 2/3 24000 13333000 LDPC/TPC Card
QPSK LDPC 3/4 27000 15000000 LDPC/TPC Card
ER-MNDMD50-EA4 Rev -

DMD50 Universal Satellite Modem Technical Specifications
MN-DMD50 Revision 4 7–7
Modulation Code Rate Min Data Rate Max Data Rate Option Card
QPSK TPC 1/2 18000 9545400 LDPC/TPC Card
QPSK TPC 3/4 27000 15000000 LDPC/TPC Card
QPSK TPC 7/8 31500 17500000 LDPC/TPC Card
OQPSK NONE 9600 20000000
OQPSK VIT 1/2 4800 20000000
OQPSK VIT 3/4 7200 20000000
OQPSK VIT 7/8 8400 20000000
OQPSK SEQ 1/2 4800 2048000
OQPSK SEQ 3/4 7200 2048000
OQPSK SEQ 7/8 8400 2048000
OQPSK TPC 1/2 4582 9545454 Supercard
OQPSK TPC 3/4 7200 15000000 Supercard
OQPSK TPC 7/8 8400 17500000 Supercard
OQPSK TPC .750 20000001 39000000 Supercard
OQPSK TPC .875 20000001 45500000 Supercard
OQPSK TPC .495 4752 6312000 Supercard
OQPSK TPC .793 7612 6312000 Supercard
OQPSK LDPC 1/2 18000 10000000 LDPC/TPC Card
OQPSK LDPC 2/3 24000 13333000 LDPC/TPC Card
OQPSK LDPC 3/4 27000 15000000 LDPC/TPC Card
OQPSK TPC 1/2 18000 9545400 LDPC/TPC Card
OQPSK TPC 3/4 27000 15000000 LDPC/TPC Card
OQPSK TPC 7/8 31500 17500000 LDPC/TPC Card
8PSK TRE 2/3 9600 52000000
8PSK TPC 3/4 10800 20000000 Supercard
8PSK TPC 7/8 12600 20000000 Supercard
8PSK TPC .495 9504 6312000 Supercard
8PSK TPC .793 15225 6312000 Supercard
8PSK TPC .750 20000001 52000000 Supercard
8PSK TPC .875 20000001 52000000 Supercard
8PSK LDPC 2/3 36000 20000000 LDPC/TPC Card
8PSK LDPC 3/4 40500 20000000 LDPC/TPC Card
8QAM TPC 2/3 36000 20000000 LDPC/TPC Card
ER-MNDMD50-EA4 Rev -

DMD50 Universal Satellite Modem Technical Specifications
MN-DMD50 Revision 4 7–8
Modulation Code Rate Min Data Rate Max Data Rate Option Card
8QAM TPC 3/4 40500 20000000 LDPC/TPC Card
8QAM TPC 7/8 48000 20000000 LDPC/TPC Card
8QAM LDPC 2/3 36000 20000000 LDPC/TPC Card
8QAM LDPC 3/4 40500 20000000 LDPC/TPC Card
16QAM VIT 3/4 14400 20000000
16QAM VIT 7/8 16800 20000000
16QAM TPC 3/4 14400 20000000 Supercard
16QAM TPC 7/8 16800 20000000 Supercard
16QAM TPC .495 9504 6312000 Supercard
16QAM TPC .793 15225 6312000 Supercard
16QAM TPC .750 20000001 52000000 Supercard
16QAM TPC .875 20000001 52000000 Supercard
16QAM LDPC 3/4 54000 20000000 LDPC/TPC Card
16QAM TPC 3/4 54000 20000000 LDPC/TPC Card
16QAM TPC 7/8 63000 20000000 LDPC/TPC Card
7.21.2 DVB
187 Mode
Modulation Code Rate Min Data Rate Max Data Rate
BPSK VIT 1/2 2400 4583333
BPSK VIT 2/3 2934 6111111
BPSK VIT 3/4 3300 6875000
BPSK VIT 5/6 3667 7638888
BPSK VIT 7/8 3850 8020833
QPSK VIT 1/2 4400 9166666
QPSK VIT 2/3 5867 12222222
QPSK VIT 3/4 6600 13750000
QPSK VIT 5/6 7334 15277777
QPSK VIT 7/8 7700 16041666
8PSK TRE 2/3 8800 18333333
8PSK TRE 5/6 11000 20000000
8PSK TRE 8/9 11550 20000000
16QAM TRE 3/4 13200 20000000
16QAM TRE 7/8 15400 20000000
ER-MNDMD50-EA4 Rev -

DMD50 Universal Satellite Modem Technical Specifications
MN-DMD50 Revision 4 7–9
188 Mode
Modulation Code Rate Min Data Rate Max Data Rate
BPSK VIT 1/2 2400 4607843
BPSK VIT 2/3 2950 6143790
BPSK VIT 3/4 3318 6911764
BPSK VIT 5/6 3687 7679738
BPSK VIT 7/8 3871 8063725
QPSK VIT 1/2 4424 9215686
QPSK VIT 2/3 5899 12287581
QPSK VIT 3/4 6636 13823529
QPSK VIT 5/6 7373 15359476
QPSK VIT 7/8 7742 16127450
8PSK TRE 2/3 8848 18431372
8PSK TRE 5/6 11059 20000000
8PSK TRE 8/9 11797 20000000
16QAM TRE 3/4 13271 20000000
16QAM TRE 7/8 15483 20000000
204 Mode
Modulation Code Rate Min Data Rate Max Data Rate
BPSK VIT 1/2 2400 5000000
BPSK VIT 2/3 3200 6666666
BPSK VIT 3/4 3600 7500000
BPSK VIT 5/6 4000 8333333
BPSK VIT 7/8 4200 8750000
QPSK VIT 1/2 4800 10000000
QPSK VIT 2/3 6400 13333333
QPSK VIT 3/4 7200 15000000
QPSK VIT 5/6 8000 16666666
QPSK VIT 7/8 8400 17500000
8PSK TRE 2/3 9600 20000000
8PSK TRE 5/6 12000 20000000
8PSK TRE 8/9 12800 20000000
16QAM TRE 3/4 14400 20000000
16QAM TRE 7/8 16800 20000000
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DMD50 Universal Satellite Modem Technical Specifications
MN-DMD50 Revision 4 7–10
7.22 DMD50 BER Specifications
7.22.1 BER Performance (Viterbi)
Figure 7-1 – DMD50 B/O/QPSK BER Performance (Viterbi)
Note: Eb/No values include the effect of using Differential Decoding and V.35 descrambling.
1E-9
1E-8
1E-7
1E-6
1E-5
1E-4
1E-3
1E-2
1E-1
012345678910 11 12
BER
Eb/No in dB
Viterbi Decoder
Specification 1/2
Rate
Specification 3/4
Rate
Specification 7/8
Rate
Typical
Performance
B/O/QPSK Uncoded Theory
ER-MNDMD50-EA4 Rev -

DMD50 Universal Satellite Modem Technical Specifications
MN-DMD50 Revision 4 7–11
7.22.2 BER Performance (Sequential)
Figure 7-2 – DMD50 B/O/QPSK BER Performance (Sequential)
Note: Eb/No values include the effect of using Differential Decoding and V.35 descrambling.
1E-9
1E-8
1E-7
1E-6
1E-5
1E-4
1E-3
1E-2
1E-1
0 1 2 3 4 5 6 7 8 9 10 11 12
BER
Eb/No in dB
Sequential
Decoder
Specification
1/2 Rate
Specification
3/4 Rate
Specification
7/8 Rate
Typical
Performance
B/O/QPSK Uncoded Theory
ER-MNDMD50-EA4 Rev -

DMD50 Universal Satellite Modem Technical Specifications
MN-DMD50 Revision 4 7–12
7.22.3 BER Performance (Viterbi with Reed-Solomon)
Figure 7-3 – DMD50 B/O/QPSK BER Performance (Viterbi – w/RS)
Note: Eb/No values include the effect of using Differential Decoding.
1E-9
1E-8
1E-7
1E-6
1E-5
1E-4
1E-3
1E-2
1E-1
0 1 2 3 4 5 6 7 8 9 10 11 12
BER
Eb/No in dB
Viterbi Decoder Reed
Solomon
Specification
1/2 Rate
Specification
3/4 Rate
Typical
Performance
B/O/QPSK Uncoded Theory
Specification
7/8 Rate
ER-MNDMD50-EA4 Rev -

DMD50 Universal Satellite Modem Technical Specifications
MN-DMD50 Revision 4 7–13
7.22.4 BER Performance (Turbo)
Figure 7-4 – DMD50 B/O/QPSK BER Performance (Turbo)
Note: Eb/No values include the effect of using interleaving and maximum iterations.
1E-9
1E-8
1E-7
1E-6
1E-5
1E-4
1E-3
1E-2
1E-1
012345678910 11 12
BER
Eb/No in dB
Turbo Decoder
Specification
Turbo 0.495
Specification
Turbo 0.793
Typical
Performance
B/O/QPSK Uncoded Theory
ER-MNDMD50-EA4 Rev -

DMD50 Universal Satellite Modem Technical Specifications
MN-DMD50 Revision 4 7–14
7.22.5 BER Performance (8PSK Trellis)
Figure 7-5 – DMD50 8PSK BER Performance (Trellis)
Note: Eb/No values include the effect of using Differential Decoding and V.35 Descrambling.
1E-9
1E-8
1E-7
1E-6
1E-5
1E-4
1E-3
1E-2
1E-1
0 1 2 3 4 5 6 7 8 9 10 11 12
BER
Eb/No in dB
Trellis
Decoder
Specification
2/3 Rate
Specification
2/3 Rate w/RS
Typical
Performance
8PSK Uncoded Theory
ER-MNDMD50-EA4 Rev -

DMD50 Universal Satellite Modem Technical Specifications
MN-DMD50 Revision 4 7–15
7.22.6 BER Performance (8PSK Turbo)
Figure 7-6 – DMD50 8PSK BER Performance (Turbo)
Note: Eb/No values include the effect of using interleaving and maximum iterations.
1E-9
1E-8
1E-7
1E-6
1E-5
1E-4
1E-3
1E-2
1E-1
012345678910 11 12
BER
Eb/No in dB
Turbo Decoder
Specification
Turbo 0.793
Typical
Performance
8PSK Uncoded Theory
ER-MNDMD50-EA4 Rev -

DMD50 Universal Satellite Modem Technical Specifications
MN-DMD50 Revision 4 7–16
7.22.7 BER Performance (16QAM Viterbi)
Figure 7-7 – DMD50 16QAM BER Performance (Viterbi)
Note: Eb/No values include the effect of using Differential Decoding and V.35 Descrambling.
1E-9
1E-8
1E-7
1E-6
1E-5
1E-4
1E-3
1E-2
1E-1
012345678910 11 12 13 14 15
BER
Eb/No in dB
Viterbi
Decoder
Specification
3/4 Rate
Specification
7/8 Rate
Typical
Performance
16QAM Uncoded Theory
ER-MNDMD50-EA4 Rev -