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DMD20/20LBST Universal Satellite Modem

Theory of Operation

MN-DMD20-20LBST Revision 14

3–21

3.14.2

Aggregate Data Rate

The aggregate data rate equals:

User Data Rate + In-Band Rate + Synchronizing Overhead Rate

Because SCC adjusts the overhead so that there are an equal number of user data bits in each

slot, the synchronizing overhead cannot be easily calculated. However, dividing the In-Band Rate

by the Control Ratio can approximate it. The basic calculation of this rate is shown:

Aggregate Date Rate = User Data Rate + In-Band Rate + (In-Band Rate/Control Ratio)

User Data

Rate

In-Band

Rate

Synchronizing

Overhead

Aggregate Data Rate

As an example, given the following parameters:

User Data Rate:

1,024,000 bps

In-Band Rate:

19,200 bps

Control Ratio:

1 to 7

Aggregate data rate = 1,024,000 + 19,200 + (19,200/7) or approximately 1,045,942 (actually
1045974).

This gives an overhead ratio of 1,045,974/1,024,000 = 1.021

In addition, another constraint changes the actual Aggregate Data Rate. The user data slot size
is limited to 2,500 bits. Because of this, the modem increases the in-band rate to reduce the user
data slot size. This only happens at higher user data rates.

NOTE: The Maximum In-Band rate is 115200. The Async interface Rate must be equal or
greater in value.

3.14.3

Overhead Rate Comparison

The SCC Overhead Ratio varies depending on the User Data Rate, the In-Band Rate, and the

Control Ratio. This gives SCC the advantage of lower overhead rates when compared to IBS,

which has a fixed overhead ratio of 16/15 or 1.067. The following table gives some examples of

SCC overhead rates for different user data and control ratios.

User

Data Rate

In-Band

Rate

Control

Ratio

Aggregate

Data Rate

Overhead

Ratio

512,000

19,200

1/7

533,974

1.043

1,024,000 19,200

1/7

1,045,974

1.021

2,048,000 19,200

1/7

2,069,951

1.011

3,072,000 19,200

1/7

3,093,943

1.007

4,096,000 19,200

1/7

4,117,951

1.005

6,312,000 19,200

1/7

6,337,248

1.004

6,312,000 19,200

1/3

6,337,606

1.004

6,312,000 19,200

1/1

6,350,418

1.006

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Summary of Contents for DMD20 LBST

Page 1: ... 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 DMD20 DMD20LBST Universal Satellite Modem Installation and Operation Manual ...

Page 2: ......

Page 3: ...Data Documentation Update Subject Chapter 7 Technical Specifications Errata Part Number ER DMD20LBS EA14 Errata documents are not subject to revision PLM CO Number C 0026230 Comments See attached page s The new information will be included in the next released revision of the manual ...

Page 4: ...ER DMD20LBS EA14 Rev PLM C 0026230 Blank Page ...

Page 5: ... to 25 dB Output Stability IF 0 5 dB Over Time and Temperature L Band 1 0 dB Over Time and Temperature Output Spectrum Meets IESS 308 309 310 Power Spectral Mask Spurious 50 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 CCITT V 35 or IBS Others Optional 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 D...

Page 6: ...ps Impedance IF 75 Ohm 50 Ohm optional L Band 50 Ohm Connector BNC 75 Ohm SMA 50 Ohm N type 50 Ohm LBST Return Loss IF 20 dB Minimum SMA 50 Ohm L Band L Band 14 dB Minimum Spectrum INTELSAT IESS 308 309 310 Compliant Input Level 10 x log Symbol Rate 100 12 dB Adjacent Channel Rejection Ratio 10 dBc Total Input Power 10 dBm or 40 dBc the Lesser 256 Kbps FEC Viterbi 1 2 3 4 7 8 None K 7 Sequential 1...

Page 7: ...MI 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 Inte...

Page 8: ... 3 and IEEE 802 3u 7 14 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 7 15 HSSI G703 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 HDB...

Page 9: ...ulation Code Rate Min Data Rate Max Data Rate Option Card BPSK NONE 4800 10000000 BPSK VIT 1 2 2400 5000000 BPSK VIT 3 4 3600 7500000 BPSK VIT 7 8 4200 8750000 BPSK SEQ 1 2 2400 2048000 BPSK SEQ 3 4 3600 2048000 BPSK CSEQ 3 4 3600 2048000 BPSK SEQ 7 8 4200 2048000 BPSK TPC 21 44 2400 4772727 Supercard BPSK TPC 495 2376 4900000 Supercard BPSK TPC 793 3806 6300000 Supercard BPSK TPC 3 4 4100 6990000...

Page 10: ... VIT 1 2 4800 10000000 OQPSK VIT 3 4 7200 15000000 OQPSK VIT 7 8 8400 17500000 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 495 4752 6312000 Supercard OQPSK TPC 793 7612 6312000 Supercard OQPSK LDPC 1 2 18000 10000000 LDPC TPC Card OQPSK LDP...

Page 11: ...16QAM TPC 793 15225 6312000 Supercard 16QAM TPC 3 4 54000 20000000 LDPC TPC Card 16QAM TPC 7 8 63000 20000000 LDPC TPC Card 16QAM LDPC 3 4 54000 20000000 LDPC TPC Card 7 19 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 VI...

Page 12: ...K 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 15...

Page 13: ...20LBST 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 0 1 2 3 4 5 6 7 8 9 10 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 DMD20LBS EA14 Rev ...

Page 14: ...SK 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 DMD20LBS EA14 Rev ...

Page 15: ...0LBST B O QPSK BER Performance Viterbi w R S 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 DMD20LBS EA14 Rev ...

Page 16: ...0 4 BER Performance Turbo Figure 7 4 DMD20 20LBST B O QPSK BER Performance Turbo 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 Turbo Decoder Specification Turbo 0 495 Specification Turbo 0 793 Typical Performance B O QPSK Uncoded Theory ER DMD20LBS EA14 Rev ...

Page 17: ...5 DMD20 20LBST 8PSK BER Performance Trellis 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 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 DMD20LBS EA14 Rev ...

Page 18: ...urbo Figure 7 6 DMD20 20LBST 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 0 1 2 3 4 5 6 7 8 9 10 11 12 BER Eb No in dB Turbo Decoder Specification Turbo 0 793 Typical Performance 8PSK Uncoded Theory ER DMD20LBS EA14 Rev ...

Page 19: ...0 20LBST 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 0 1 2 3 4 5 6 7 8 9 10 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 DMD20LBS EA14 Rev ...

Page 20: ... DMD20 20LBST 16QAM BER Performance Viterbi w R S 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 13 14 15 BER Eb No in dB Viterbi Decoder Reed Solomon Specification 3 4 Rate w RS Specification 7 8 Rate w RS Typical Performance 16QAM Uncoded Theory ER DMD20LBS EA14 Rev ...

Page 21: ... Figure 7 9 DMD20 20LBST 16QAM 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 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 BER Eb No in dB Turbo Decoder Turbo 0 495 Turbo 0 793 Typical Performance 16QAM Uncoded Theory ER DMD20LBS EA14 Rev ...

Page 22: ...formance O QPSK Turbo Figure 7 10 DMD20 20LBST O QPSK BER Performance Turbo 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 Turbo Decoder Specification 1 2 Rate Specification 3 4 Rate Typical Performance B O QPSK Uncoded Theory Specification 7 8 Rate ER DMD20LBS EA14 Rev ...

Page 23: ...BPSK Turbo Figure 7 11 DMD20 20LBST BPSK BER Performance Turbo Note BPSK TPC 5 16 available with PL 5051 Turbo Codec Hardware 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 Turbo Decoder Specification 5 16 Rate Typical Performance B O QPSK Uncoded Theory Specification 21 44 Rate ...

Page 24: ... 7 20 12 BER Performance 8PSK Turbo Figure 7 12 DMD20 20LBST 8PSK BER Performance Turbo 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 Turbo Decoder Specification 3 4 Rate Typical Performance 8PSK Uncoded Theory Specification 7 8 Rate ER DMD20LBS EA14 Rev ...

Page 25: ...13 BER Performance 16QAM Turbo Figure 7 13 DMD20 20LBST 16QAM BER Performance Turbo 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 13 14 15 BER Eb No in dB Turbo Decoder Specification 3 4 Rate Typical Performance 16QAM Uncoded Theory Specification 7 8 Rate ER DMD20LBS EA14 Rev ...

Page 26: ...K BER Performance LDPC Figure 7 14 DMD20 20LBST B O QPSK BER Performance LDPC 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 LDPC Decoder Typical Performance B O QPSK Uncoded Theory Specification 1 2 Rate Specification 2 3 Rate Specification 3 4 Rate ER DMD20LBS EA14 Rev ...

Page 27: ...rformance LDPC Figure 7 15 DMD20 20LBST 8PSK 8QAM BER Performance LDPC 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 LDPC Decoder Typical Performance 8PSK Uncoded Theory 8QAM Rate 2 3 Specification 8PSK 8QAM Rate 3 4 Specification 8PSK Rate 2 3 Specification ER DMD20LBS EA14 Rev ...

Page 28: ...ion 14 7 24 7 20 16 16QAM BER Performance LDPC Figure 7 16 DMD20 20LBST 16QAM BER Performance LDPC 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 LDPC Decoder Typical Performance 16QAM Uncoded Theory Specification 3 4 Rate ER DMD20LBS EA14 Rev ...

Page 29: ...E 8 6 7 dB 7 4 dB 8 4 dB 6 2 dB 6 9 dB 7 9 dB 1E 9 7 1 dB 7 8 dB 8 9 dB 6 6 dB 7 4 dB 8 4 dB 1E 10 7 4 dB 8 3 dB 9 4 dB 6 9 dB 7 8 dB 8 9 dB Table 7 2 B O QPSK BER Performance Sequential BER Specification Typical 1 2 Rate 3 4 Rate 7 8 Rate 1 2 Rate 3 4 Rate 7 8 Rate 1E 3 3 3 dB 5 1 dB 3 dB 4 3 dB 5 3 dB 1E 4 3 5 dB 5 3 dB 3 2 dB 4 5 dB 5 7 dB 1E 5 3 8 dB 5 4 dB 6 5 dB 3 4 dB 4 7 dB 6 dB 1E 6 4 1 d...

Page 30: ...dB 5 dB 7 dB 1E 10 9 5 dB 5 2 dB 7 3 dB Table 7 6 8PSK BER Performance Turbo Typical BER Specification 3 4 Rate 7 8 Rate 3 4 Rate 7 8 Rate 1E 3 8 9 dB 10 3 dB 8 1 dB 9 5 dB 1E 4 9 8 dB 11 1 dB 9 dB 10 3 dB 1E 5 10 7 dB 11 9 dB 9 9 dB 11 1 dB 1E 6 11 5 dB 12 7 dB 10 7 dB 11 9 dB 1E 7 12 4 dB 13 5 dB 11 6 dB 12 7 dB 1E 8 13 3 dB 14 3 dB 12 5 dB 13 5 dB 1E 9 14 2 dB 15 1 dB 13 4 dB 14 3 dB 1E 10 15 d...

Page 31: ...dB 3 8 dB 4 3 dB 2 6 dB 3 4 dB 4 dB 1E 7 3 1 dB 4 1 dB 4 4 dB 2 8 dB 3 7 dB 4 1 dB 1E 8 3 3 dB 4 4 dB 4 5 dB 3 dB 4 dB 4 2 dB Table 7 10 O QPSK BER Performance Turbo BER Specification Typical 5 16 Rate 21 44 Rate 5 16 Rate 21 44 Rate 1E 5 2 7 dB 2 4 dB 1E 6 2 7 dB 2 9 dB 2 5 dB 2 6 dB 1E 7 2 9 dB 3 1 dB 2 7 dB 2 8 dB 1E 8 3 1 dB 3 3 dB 2 9 dB 3 dB BER Table 7 11 BPSK BER Performance Turbo Specific...

Page 32: ... 4 dB 1E 4 6 7 dB 7 9 dB 6 4 dB 7 5 dB 1E 5 7 dB 8 dB 6 7 dB 7 6 dB 1E 6 7 4 dB 8 1 dB 7 1 dB 7 7 dB 1E 7 7 8 dB 8 2 dB 7 5 dB 7 8 dB 1E 8 8 2 dB 8 3 dB 7 9 dB 7 9 dB Table 7 13 16QAM BER Performance Turbo BER Specification Typical 2 3 Rate 3 4 Rate 2 3 Rate 3 4 Rate 2 3 Rate 3 4 Rate 2 3 Rate 3 4 Rate 1E 5 5 6 dB 5 2 dB 4 6 dB 5 6 dB 4 2 dB 5 2 dB 1E 9 5 7 dB 6 dB 5 3 dB 5 6 dB 5 dB 6 dB 4 6 dB 5...

Page 33: ...cations MN DMD20 20LBST Revision 14 7 29 7 20 17 AGC Output Voltage The AGC Output Voltage is a function of the Input Power Level in dBm The AGC Output Voltage is found on the Alarm connector Pin 14 of J15 Figure 7 17 AGC Voltage Monitor ER DMD20LBS EA14 Rev ...

Page 34: ...DMD20 20LBST Universal Satellite Modem Technical Specifications MN DMD20 20LBST Revision 14 7 30 BLANK PAGE ER DMD20LBS EA14 Rev ...

Page 35: ...ion Errata Part Number ER DMD20LBS EB14 Errata documents are not subject to revision PLM CO Number C 0028800 Comments The new information will be included in the next released revision of the manual IMPORTANT Set the modem to Loop Timing mode for these Loopback operations Tx Rx Terrestrial Loopback Tx Rx Baseband Loopback Rx Baseband Loopback ...

Page 36: ...ER DMD20LBS EB14 Rev PLM C 0028800 Blank Page ...

Page 37: ...omtech EF Data 2114 West 7th Street Tempe Arizona 85281 USA 480 333 2200 FAX 480 333 2161 Comtech EF Data is an AS9100 Rev B ISO9001 2000 Registered Company DMD20 DMD20LBST Universal Satellite Modem Installation and Operation Manual Part Number MN DMD20 20LBST Revision 14 ...

Page 38: ...BLANK PAGE ...

Page 39: ...ons 2 3 2 5 Initial Configuration Check 2 4 2 6 Modulator Checkout 2 6 2 6 1 Initial Power Up 2 6 2 6 2 Factory Terminal Setup 2 6 CHAPTER 3 THEORY OF OPERATION 3 1 3 1 Modem Hardware 3 1 3 1 1 L Band IF Printed Circuit Card 3 2 3 1 2 Baseband Processing Printed Circuit Card 3 3 3 1 3 Enhanced Interface Printed Circuit Card 3 3 3 2 Functional Block Diagram 3 3 3 2 1 Front Panel 3 4 3 2 2 Baseband ...

Page 40: ...22 V 35 Interface Standard 3 14 3 8 1 G 703 Interface Optional 3 14 3 8 2 HSSI Interface Optional 3 14 3 8 3 Ethernet Data Interface Optional 3 14 3 9 Reed Solomon Codec 3 15 3 9 1 Reed Solomon Operation 3 15 3 9 2 Reed Solomon Code Rate 3 15 3 9 3 Interleaving 3 16 3 10 Asynchronous Overhead Operation Framing Multiplexer Capability 3 17 3 11 Standard IBS Mode 3 18 3 12 Asynchronous Multiplexer Mo...

Page 41: ...3 3 Estimating PSD Ratio Using Spectrum Analyzer 3 43 3 15 14 DoubleTalk Carrier in Carrier Specifications 3 44 3 15 15 Carrier in Carrier Summary 3 44 3 15 16 Glossary 3 44 3 16 EDMAC Satellite Framing Deframing Mode 3 46 3 17 Locating the ID Code Operational Procedure 3 46 3 18 Strap Codes 3 46 CHAPTER 4 USER INTERFACES 4 1 4 1 User Interfaces 4 1 4 2 Front Panel User Interface 4 1 4 2 1 LCD Fro...

Page 42: ...5 4 5 4 2 TX IF J11 5 4 5 4 3 TX L Band IF J12 5 4 5 4 4 RX IF 5 5 5 4 5 RX L Band IF 5 5 5 4 6 ALARM J15 5 5 5 4 7 EXT CLK J16 5 6 5 4 8 ASYNC J17 5 6 5 4 9 J18 5 6 5 4 10 EIA 530 J19 5 7 5 4 11 REMOTE J20 5 8 5 4 12 ETHERNET J21 5 8 5 5 DMD20 LBST Chassis Connections Standard 5 9 5 5 1 EXT REF J10 5 9 5 5 2 TX J11 5 9 5 5 3 RX J14 5 9 5 5 4 ALARM J15 5 9 5 5 5 EXT CLK J16 5 10 5 5 6 ASYNC J17 5 ...

Page 43: ... 22 5 11 4 DVB M2P OUT J4 5 24 5 12 Ethernet Data Interface Optional 5 26 5 13 HSSI G 703 5 26 5 13 1 64K AUDIO J2 5 27 5 13 2 8K DATA J3 5 28 5 13 3 G 703 BAL J4 5 28 5 13 4 ESC ALARM J5 5 29 5 13 5 SD DDI J6 5 29 5 13 6 DDO J7 5 29 5 13 7 IDI J8 5 29 5 13 8 SD IDO J9 5 30 5 14 HSSI Ethernet J1 5 30 5 15 Ethernet Data Interface 5 31 5 16 GigE Interface 5 32 CHAPTER 6 MAINTENANCE AND TROUBLESHOOTI...

Page 44: ...7 1 7 1 Data Rates 7 1 7 2 Modulator 7 1 7 3 Demodulator 7 2 7 4 Plesiochronous Buffer 7 3 7 5 Monitor and Control 7 3 7 6 DMD20 DMD20 LBST Drop and Insert Optional 7 3 7 7 Terrestrial Interfaces 7 3 7 8 IDR ESC Interface Optional 7 3 7 9 IBS Synchronous Interface Standard 7 3 7 10 High Speed Serial Interface HSSI 7 4 7 11 ASI 7 4 7 12 DVB M2P 7 4 7 13 Ethernet Data Interface Optional 7 4 7 14 Gig...

Page 45: ... Reed Solomon 7 18 7 20 11 BER Performance 16QAM Turbo 7 19 7 20 12 BER Performance 16QAM Turbo 7 20 7 20 13 1 2 Rate B O QPSK BER Performance LDPC 7 21 7 20 14 2 3 Rate Q 8PSK 8QAM BER Performance LDPC 7 22 7 20 15 3 4 Rate Q 8PSK 8 16QAM BER Performance LDPC 7 23 7 20 16 AGC Output Voltage 7 28 APPENDIX A PRODUCT OPTIONS A 1 A 1 Hardware Options A 1 A 2 G 703 IDR ESC Interface A 1 A 3 Internal H...

Page 46: ... C 1 C 4 Carrier Auto C 1 C 5 Carrier VSat C 2 C 6 Carrier RTS C 2 APPENDIX D STRAP CODES D 1 D 1 Strap Codes D 1 D 2 Sample Applications D 5 D 2 1 Operational Case Examples D 6 APPENDIX E TCP IP ETHERNET SETUP E 1 E 1 Introduction E 1 E 2 TCP IP Network Configuration E 1 E 3 Network Configuration Summary E 3 E 4 Ethernet Test E 3 E 4 1 Connecting the Modem Ethernet Cable to a Network Link E 3 E 4...

Page 47: ...9 F 6 2 Configure Firefox for the Radyne WEB Interface F 9 F 6 2 1 Change the encoding F 10 F 6 2 2 Install the Internet Explorer Tab V2 add on F 11 F 6 3 Configure Chrome for the Radyne WEB Browser F 12 F 6 3 1 Change the encoding F 13 F 6 3 2 Install the Internet Explorer Tab for Chrome F 14 F 6 4 Configure Safari for the Radyne WEB Browser F 15 F 6 4 1 Empty the browser cache F 15 F 6 4 2 Reset...

Page 48: ... 3 D I Maps and Map Editing H 13 APPENDIX I EFFICIENT DROP AND INSERT D I I 1 I 1 Introduction I 1 I 2 Prerequisite I 1 I 3 Efficient Drop Insert Mode I 2 I 3 1 Calculating the Required Satellite Bandwidth I 3 I 3 2 Calculating the Basic Efficient D I Rate I 3 I 3 3 Calculating the Efficient D I Rate with E1 Signaling I 3 I 3 4 Calculating the Efficient D I Rate with Enhanced Asynchronous Overhead...

Page 49: ...ectrical Characteristics of Digital Interface Circuits Department of Defense DOD MIL STD 188 165A Interoperability and Performance Standards for SHF Satellite Communications PSK Modems FDMA Operation dated November 2005 INTELSAT Earth Station Standards IESS 308 309 310 and 315 EUTELSAT SMS Military Standards References to MIL STD 188 apply to the 114A series i e MIL STD 188 114A which provides ele...

Page 50: ...cord required for use in the European Community CAUTION Double pole Neutral Fusing ACHTUNG Zweipolige bzw Neutralleiter Sicherung International Symbols Symbol Definition Symbol Definition Alternating Current Protective Earth Safety Ground Fuse Chassis Ground IMPORTANT or NOTE indicates a statement associated with the task being performed or information critical for proper equipment function CAUTIO...

Page 51: ... parts thereof where the serial number or the serial number of any of its parts has been altered defaced or removed The warranty does not cover damage or loss incurred in transportation of the product The warranty does not cover replacement or repair necessitated by loss or damage from any cause beyond the control of Comtech EF Data Corporation such as lightning or other natural and weather relate...

Page 52: ...ort comtechefdata com IP Enabled Satellite Modems IP Based Modem Accessories Encapsulators Receivers Filtering Encryption turboIP Performance Enhancement Proxies PEP SkyWire MDX420 Satellite Network Gateway Tel 1 480 333 2433 Fax 1 480 333 2161 Email cdmipsupport comtechefdata com Vipersat Network Products IP Enabled Satellite Modems used in conjunction with VMS Tel 1 510 252 1462 select option 2 ...

Page 53: ... for different services Intelsat IDR and IBS DVB Low density Parity Check Coding LDPC and Closed Networks are supported All of the configuration and Monitor and Control M C Functions are available at the Front Panel Operating parameters such as variable data rates FEC Code Rate modulation type IF Frequencies IBS IDR Framing and interface type can be readily set and changed at the Front Panel by ea...

Page 54: ...figurations The DMD20 DMD20 LBST can be configured in the following different ways features and options that are installed when the unit is ordered feature upgrades hardware options that are installed to a unit that is sent to a Radyne facility hardware options that the user can install at their own location 1 2 1 Features Options Installed at Time of Order Features installed at the time of orderi...

Page 55: ...its may also be sent to the factory for hardware option installation Please contact the Customer Service Department for information not limited to availability and to shipping costs 1 3 Function Accessibility All functions can be accessed through the front panel terminal or personal computer via a serial link or via the Ethernet port offering a complete remote monitoring and control capability IMP...

Page 56: ...DMD20 20LBST Universal Satellite Modem Introduction MN DMD20 20LBST Revision 14 1 4 BLANK PAGE ...

Page 57: ...am space covering the modem 3 Remove the modem power cord and user s manual from the carton 4 Save the packing material for storage or reshipment purposes 5 Inspect the equipment for any possible damage incurred during shipment Note If damage is evident contact the carrier and Comtech EF Data immediately and submit a damage report 6 Check the contents against the packing list to verify completenes...

Page 58: ...d internally at the power supply module DO NOT open the Chassis under any circumstances The unit contains a Lithium Battery DANGER OF EXPLOSION exists if the battery is incorrectly replaced Replace only with the same or equivalent type recommended by the manufacturer Dispose of used batteries in accordance with local and national regulations Before initially applying power to the unit it is a good...

Page 59: ...can be placed on a table or suitable surface if required When mounted in an equipment rack adequate ventilation must be provided The ambient temperature in the rack should be between 10 and 35 C and held constant for best equipment operation The air available to the rack should be clean and relatively dry The DMD50 units may be stacked one on top of the other up to a maximum of 10 consecutive unit...

Page 60: ...kall anslutas till jordat uttag 2 5 Initial Configuration Check The is shipped from the factory with preset factory defaults Upon initial power up a user check should be performed to verify the shipped modem configuration Refer to Section 4 User Interfaces to locate and verify that the following configuration settings are correct Transmit Tx and Receive Rx Interface types are dependent upon the cu...

Page 61: ... 1 2 Rate Viterbi Outer FEC Disabled Modulation QPSK Frequency 70 000000 MHz Modulator Output Power 20 dBm Demodulator Data Rate 2 048 Mbps Mode Closed Network Satellite Framing None Scrambler V 35 IESS Drop and Insert Disabled Inner FEC 1 2 Rate Viterbi Outer FEC Disabled Modulation QPSK Frequency 70 000000 MHz To lock up the modem enter IF Loopback Enable under the Test Menu or connect a Loopbac...

Page 62: ...Rear Panel Switch located above the power entry connector to the On Position Upon initial and subsequent power ups the Microprocessor will test itself and several of its components before beginning its Main Monitor Control Program These power up diagnostics show no results if successful If a failure is detected the Fault LED will illuminate The initial field checkout of the modem can be accomplish...

Page 63: ...d printed circuit cards available for additional features The minimum configuration consists of an L Band IF Assembly and a Digital Baseband Assembly The optional printed circuit cards include a Turbo Codec printed circuit card and one of several types of Interface printed circuit card refer to Appendix A A block diagram of the Modem is shown in Figure 3 1 Figure 3 1 Block Diagram ...

Page 64: ...phase I and quadrature Q signals are generated on the Digital Baseband Printed Circuit Card routed to the L Band IF Printed Circuit Card and modulated at the desired frequency The L Band or 70 140 modulated signal is then passed through a microprocessor controlled variable attenuator providing gain control of the output signal In the complex downconverter the signal for demodulation is amplified a...

Page 65: ...erfaces an EIA 530 Interface supporting RS 422 V 35 and RS 232 All three interfaces are provided on the same DB 25 Connector and are selectable from the front panel The Baseband Printed Circuit Card also contains the Monitor and Control M C Circuitry responsible for Programmable part setup and initialization Continuous control and adjustment of some functions Calibration Monitoring fault status Ca...

Page 66: ...The Baseband Processor performs all of the functions required for an IBS IDR Framing Unit a Reed Solomon Codec and an E1 T1 Drop and Insert System In addition the Baseband Processing Section provides for transmit clock selection and rate adaptation as well as a rate adapter and Plesiochronous Doppler PD Buffer in the receive direction A multiplexer is also provided for the SCT Clock Source for Loo...

Page 67: ...d is sent to the UIM Backward Alarm indications are sent to the M C Subsystem In Drop and Insert Mode the Insert Processor synchronizes to the incoming terrestrial T1 E1 Data Stream extracts satellite channels from the PD Buffer and then inserts them into the desired terrestrial time slots in the T1 E1 Data Stream 3 3 Monitor Control M C Subsystem The modems M C system is connected to most of the ...

Page 68: ... SNMP screens and protocols 3 3 2 Modem Remote Communications RLLP The Remote Port located on J20 allows for control and monitoring of parameters and functions via an RS 232 Serial Interface or RS 485 for RLLP Protocol Equipment Remote Mode setup can be entered from the front panel or the Web Browser interface under the System menu This requires the user to first set the Remote Port Control to Rem...

Page 69: ... Common Fault De energized when any fault that is not explicitly a Tx or Rx Fault such as an M C or Power Supply Fault Open Collector Faults The UIM provides two Open Collector Faults that appear at Pins 18 21 on J19 Mod Fault Will sink up to 20 ma maximum until a transmit or common fault is detected Will not sink current if a fault is detected Demod Fault Will sink up to 20 ma maximum until a rec...

Page 70: ...ata from the satellite is looped back for retransmission to the satellite providing a far end loopback prior to the framing unit RX Baseband Loopback Receive Data from the satellite is looped back for retransmission to the satellite providing a far end loopback after to framing unit TX RX Terrestrial Loopback provides both Terrestrial loopbacks simultaneously TX RX Baseband Loopback provides both ...

Page 71: ...DMD20 20LBST Universal Satellite Modem Theory of Operation MN DMD20 20LBST Revision 14 3 9 Figure 3 4 Loopback Functional Block Diagram ...

Page 72: ...DMD20 20LBST Universal Satellite Modem Theory of Operation MN DMD20 20LBST Revision 14 3 10 Figure 3 5 Loopback Functional Block Diagram Figure 3 6 Loopback Functional Block Diagram ...

Page 73: ...SCT SCTE TRANSMIT RECEIVE CLOCK DATA RECOVERY EXT CLK EXT BNC SCT SCTE RX SAT RT RD SCR BUFFER CLK SRC CLOCK RECOVERY EXT IDI IDI MODULATION HIGH STABILITY DEMODULATION J19 J19 J10 J16 J8 CLK POL DATA POLARITY NORMAL INVERTED AUTO INV TERR BASE INVERT NONE INV BASEBAND INV TERR DATA DATA POLARITY BUFFER CLK POL NORMAL INVERTED INV TERR BASE INVERT NONE INV BASEBAND INV TERR DATA Figure 3 7 Clockin...

Page 74: ...ve Clock Satellite Clock or Receive Timing RT When SCT clock is configured as Internal the frequency of the clock is set the same as the Transmit Terrestrial Clock rate If SCT clock is configured as SCR the internal clock is set to the same rate as the incoming receive satellite clock SCT is sometimes referred to as Internal Timing or Send Timing ST In the event that the satellite clock is lost th...

Page 75: ...ransmit Terrestrial interface 3 7 2 3 SCT Serial Clock Transmit If SCT clock is selected as the RX Buffer clock source then it should be configured for internal SCT is sometimes referred to as Internal Timing or Send Timing ST 3 7 2 4 EXT CLK EXT BNC External Clock J16 The External Clock that can be selected as the RX Buffer clock source This is a 75ohm unbalanced BNC connector This clock source i...

Page 76: ...s excessive jitter 3 8 1 G 703 Interface Optional If the G 703 Interface is selected then the Tx Clock Source will default to SCTE and the Clock Polarity will default to Auto Loop timing with a G 703 Interface or Asymmetrical Data Rates requires external equipment at the remote end that is capable of using the recovered RD Clock as source timing for SCTE SD The modem will not manipulate the clock ...

Page 77: ...words are added so that the blocks can be reformed in the Receiving Modem Refer to Figures 3 14 and 3 15 Data is then sent to the modulator where it is convolutionally encoded modulated and transmitted to the satellite When the signal is received and demodulated by the Receiving Modem it is fed to a Viterbi Decoder for the first layer of error correction After error correction is performed by the ...

Page 78: ...iagram Figure 3 9 Reed Solomon Decoder Functional Block Diagram Table 3 1 Reed Solomon Codes Type of Service Data Rate Kbps R S Code n k t 1 Bandwidth Expansion n k 1 Interleaving Depth Maximum 2 R S Codec Delay ms Small IDR With 16 15 O H 64 128 256 384 512 768 1024 1536 126 112 7 126 112 7 126 112 7 126 112 7 126 112 7 126 112 7 126 112 7 126 112 7 0 125 0 125 0 125 0 125 0 125 0 125 0 125 0 125...

Page 79: ...ync the Baud Rate is selectable but Data Rate is limited The maximum Baud Rate is 19 200 bps for IBS Async Two software controlled modes are designed into the card to best utilize the available bits Standard IBS and IBS Async The characteristics of the Channel Interface are also determined by the standard or Async mode The Async Channel can be set under software control to either RS 232 or RS 485 ...

Page 80: ...l data rate and is normally used to super sample an asynchronous data channel Bit 2 Frame Alignment Part of the Frame Alignment word Bit 3 Backward Alarm Transmit and Receive with main processor to activate Main Alarm LED Bit 4 Multiframe Message As per IBS Bits 5 and 6 Spare Not currently utilized Bits 7 and 8 Encryption Utilization Not currently utilized The ratio of the Through Terrestrial Data...

Page 81: ...on the earth station that the user wishes to trigger the backward alarm When ground is applied to the Common Input Connection of one of these relays that relay and associated backward alarm will then be in a no fault state When the ground is removed the relay and the associated Tx Backward Alarm will toggle to the faulted state When in the faulted state the receive end of the link will receive tha...

Page 82: ...C frame consists of the following A 10 bit synchronization pattern called the Synchronizing Word Multiple variable length slots filled with user data Multiple 10 bit control words that contains eight bits of in band data the extra two bits are for the async start stop The number of user data slots and control words per frame is selected by the SCC Control Ratio Parameter This can be any value from...

Page 83: ...1 021 In addition another constraint changes the actual Aggregate Data Rate The user data slot size is limited to 2 500 bits Because of this the modem increases the in band rate to reduce the user data slot size This only happens at higher user data rates NOTE The Maximum In Band rate is 115200 The Async interface Rate must be equal or greater in value 3 14 3 Overhead Rate Comparison The SCC Overh...

Page 84: ...ng the bigger of Minimum In Band or the selected In Band the modem calculates the number of bits for each user data slot result is truncated to an integer Slot Bits User Data Rate Control Ratio 10 In band Rate Control Ratio 1 Note Slot bits of 0 are invalid The actual ratio the modem uses is Actual Ratio Slot Bits 10 Slot Bits Example 1 User Data Rate 1 024 000 bps In Band Rate 19 200 bps Control ...

Page 85: ...nd data for the overhead channel This sets the overhead amount only The actual amount of data that can be passed through the overhead channel will be set under ES Baud Rate see Step 6 below 4 Under the Interface General menus locate the TX ASYNC MODE menu 5 Under the TX ASYNC MODE Menu set the desired ES Interface type ES INTERFACE RS 232 RS 485 This allows the user to select the interface type 6 ...

Page 86: ...ate Setting Symbol Rate 9 6 1 1 300 6800 9 6 1 2 300 6700 9 6 1 3 300 6667 9 6 1 4 300 6650 9 6 1 5 300 6641 9 6 1 6 300 6634 9 6 1 7 300 6629 9 6 1 1 9600 19200 9 6 1 2 9600 17067 9 6 1 3 9600 15543 9 6 1 4 9600 14400 9 6 1 5 9600 14400 9 6 1 6 9600 14400 9 6 1 7 9600 14400 512 1 1 9600 354165 512 1 2 9600 350948 512 1 3 9600 349867 512 1 4 9600 349346 512 1 5 9600 349201 512 1 6 9600 348802 512 ...

Page 87: ...ch EF Data refers to it as DoubleTalk Carrier in Carrier CnC CnC was first introduced in Comtech EF Data products in the CDM Qx Satellite Modem and more recently in the CLO 10 Link Optimizer The implementation of DoubleTalk Carrier in Carrier in the Radyne DMD20 has been further refined and some of the limitations that existed in the CDM Qx implementation have been overcome This innovative technol...

Page 88: ... diagram of CnC processing The two ends of the link are denoted A and B and the uplink and downlink are shown This performance is achieved through advanced signal processing algorithms that provide superior cancellation while tracking and compensating for the following common link impairments 1 Time varying delay In addition to the static delays of the electronics and the round trip delay associat...

Page 89: ... example of the latter would be transient power differences due to different levels of atmospheric fading in the uplinks CnC compensates for the asymmetries up to a certain extent Figure 3 10 Conceptual Block Diagram In a number of ways CnC carriers behave similar to conventional carriers in satellite links They are both exposed to adjacent carriers cross polarization and rain fade and exhibit imp...

Page 90: ... not modulators only or demodulators only In addition to minimize false acquisition observe the following Use of IESS 315 V 35 Scrambler is highly recommended Keep the search delay range as narrow as possible once the modem has reported the search delay narrow the search delay range to the nominal reported value 5 ms for example if the modem reported delay is 245 ms narrow the search range to say ...

Page 91: ...essed as a complex envelope signal The Radyne DMD20 then suppresses the version of the near end carrier on the downlink side and then passes the desired carrier to the demodulator for normal processing To further illustrate as shown in Figure 3 13 without DoubleTalk Carrier in Carrier the two carriers in a typical full duplex satellite link are adjacent to each other With DoubleTalk Carrier in Car...

Page 92: ...entally a correlation operation anything deterministic in the interfering carrier within the correlation window of the algorithm will potentially produce false correlation peaks and result in incorrect delays and or frequency Normally this is not a problem since energy dispersal techniques are utilized in the vast majority of commercial and military modems However it is something that must be kept...

Page 93: ...ced by allowing the use of a smaller BUC HPA and or antenna And as DoubleTalk Carrier in Carrier can be used to save transponder bandwidth and or transponder power it can be successfully deployed in bandwidth limited as well as power limited scenarios 3 15 5 DoubleTalk Carrier in Carrier Cancellation Process The state of the art signal processing technology employed via DoubleTalk Carrier in Carri...

Page 94: ...nal to a stored copy of the local modulator s transmitted signal The interference cancellation algorithm uses the composite signal and the local copy of S1 to estimate the necessary parameters of scaling complex gain phase delay offset and frequency offset The algorithm continuously tracks changes in these parameters as they are generally time varying in a satellite link Figure 3 15 Carrier in Car...

Page 95: ...AM 0 6 dB 3 15 7 Carrier in Carrier Latency Carrier in Carrier has no measurable impact on circuit latency 3 15 8 Carrier in Carrier Link Design Carrier in Carrier link design involves finding the FEC and modulation combination that provides optimal bandwidth utilization Just like conventional link design it is an iterative process that involves trying different FEC and modulation combinations wit...

Page 96: ... 2 Phoenix AZ 2 4 m Data Rate 512 kbps 512 kbps The traditional link was based on QPSK TPC 3 4 and required 0 96 MHz of leased BW The LST summary for the traditional link is as follows Carrier in Carrier link design involved trying different Modulation FEC Code Rates to find the optimal combination 8 QAM LDPC 2 3 with Carrier in Carrier QPSK LDPC 3 4 with Carrier in Carrier QPSK LDPC 2 3 with Carr...

Page 97: ...DMD20 20LBST Universal Satellite Modem Theory of Operation MN DMD20 20LBST Revision 14 3 35 Link parameters and LST summary for QPSK LDPC 2 3 with Carrier in Carrier is as follows ...

Page 98: ...8 1 1468 20 2 1 2 QPSK LDPC 3 4 0 47785 0 6734 0 6734 30 2 1 3 QPSK LDPC 2 3 0 53735 0 5777 0 5777 40 2 1 4 QPSK LDPC 1 2 0 7168 0 5184 0 7168 25 2 1 Based on this analysis QPSK LDPC 2 3 with Carrier in Carrier provides the maximum savings of 40 In addition to 40 reduction in Leased Bandwidth using Carrier in Carrier also reduced the required HPA Power by almost 40 HPA Power Traditional Link QPSK ...

Page 99: ...e following example Satellite Transponder IS 901 342º W 22 22 EH EH Earth Station 1 Africa 4 5 m Earth Station 2 Africa 3 0 m Data Rate 3000 Mbps 1000 Mbps While the traditional link was based on QPSK TPC 3 4 and required 3 9 MHz of leased bandwidth the Carrier in Carrier link was based on QPSK LDPC 3 4 and QPSK LDPC 1 2 and required 2 8 MHz of leased bandwidth The savings summary is as follows It...

Page 100: ...thereby significantly reducing the total occupied bandwidth and total power equivalent bandwidth when compared to the original side by side 8PSK TPC 3 4 carriers To continue consider this example Satellite Transponder IS 901 342º W 22 22 EH EH Earth Station 1 Africa 9 2 m Earth Station 2 Africa 4 5 m Data Rate 2 048 Mbps 2 048 Mbps Whereas the original link used 8 PSK TPC 3 4 the Carrier in Carrie...

Page 101: ...t for CnC Measure record Receive Signal Level RSL at Site B 2 Turn OFF the carrier at Site A Turn ON the carrier at Site B CnC function is OFF at both sites Using a spectrum analyzer measure Co No No at the input to the modem at Site A Using a spectrum analyzer measure Co No No at the input to the modem at Site B Measure record Eb No at Site A Make sure there is sufficient margin to account for Cn...

Page 102: ...e link of the desired Eb No Carrier in Carrier should be OFF Record the Eb No as displayed by the Modems Observe the 2 carriers on a spectrum analyzer and record the PSD ratio Example Link Full duplex 512 kbps QPSK LDPC 2 3 circuit between 4 6 m and 2 4 m antennas Recorded Eb No 2 6 dB at both modems PSD Ratio 1 2 dB measured at larger Antenna 2 Now relocate one of the carriers on top of the other...

Page 103: ...D20 3 Calculate the Allocated Bandwidth BW and Power Equivalent Bandwidth PEB for the duplex link BWDuplex Link Greater of BWCarrier 1 BWCarrier 2 PEBDuplex Link PEBCarrier 1 PEBCarrier 2 Leased BWDuplex Link Greater of BWDuplex Link PEBDuplex Link 4 For an optimal link the Leased Bandwidth and the Power Equivalent Bandwidth should be equal nearly equal 5 Repeat the link budget process by selectin...

Page 104: ... from a link budget using Downlink EIRP and Symbol Rate PSD Downlink EIRP 10 Log Symbol Rate PSD Ratio Example Carrier Downlink EIRP Symbol Rate Power Spectral Density A to B 27 dBW 500 ksps 29 99 dBW Hz B to A 24 dBW 375 ksps 31 74 dBW Hz PSD Ratio A 29 99 31 74 1 75 dB PSD Ratio B 01 74 29 99 1 75 dB 3 15 13 1 Estimating PSD Ratio from LST ...

Page 105: ...rum Analyzer PSD Ratio or CnC Ratio can also be estimated using a Spectrum Analyzer capable of integrating the signal power in a given bandwidth CnC Ratio in dB PowerC1 in dBm PowerC2 in dBm PSD Ratio in dB PowerC1 10 log BWC1 in Hz PowerC2 10 log BWC2 in Hz CnC Ratio 10 log BWC1 BWC2 If the two carriers have same Symbol Rate Bandwidth then the CnC Ratio is same as the PSD Ratio ...

Page 106: ... 0 1Rs kHz up to a maximum of 200 kHz Delay range 0 330 ms Eb No Degradation equal Inbound Outbound power spectral density BPSK 0 3dB QPSK 0 3dB OQPSK 0 3dB 8 PSK 0 5dB 8 QAM 0 4dB 16 QAM 0 6dB For 10 dB power spectral density ratio outbound interferer 10 dB higher than desired inbound add an additional 0 3 dB Monitor Functions Delay in milliseconds Frequency offset between outbound interferer and...

Page 107: ...the Leased Bandwidth LBW Leased Bandwidth or Leased Resource is the greater of the Allocated Bandwidth and Power Equivalent Bandwidth For example if a carrier requires 3 MHz of Allocated BW and 4 5 MHz of PEB the Leased Bandwidth is 4 5 MHz Power Spectral Density PSD Power Spectral Density PSD is the signal power per unit bandwidth dBW Hz or dBm Hz For example Signal power 20 dBm Signal bandwidth ...

Page 108: ...ing the ID Code Operational Procedure The modem has unique ID codes that allow the user to add feature upgrades to the modem without the unit having to be returned to the factory Users are required to identify these ID codes when they want additional features added to their unit Radyne will supply a new ID code that is required to be entered in the ID code field Once the new ID code is entered the...

Page 109: ...2 Front Panel User Interface The Front Panel of the DMD20 DMD20 LBST allows for complete control and monitor of all DMD20 DMD20 LBST parameters and functions via a keypad LCD display and status LEDs The front panel layout is shown in Figure 4 1 and Figure 4 2 showing the location and labeling of the front panel The front panel is divided into four functional areas the LCD Front Panel Display the C...

Page 110: ...ction 1 LCD Front Panel Display Displays operating parameters and Configuration data 2 Cursor Control Arrow Keys Controls the up down right and left motion of the cursor in the LCD Display window 3 Numeric Keypad Allows entry of numeric data and Clear and Enter function keys 4 Front Panel LED Indicators See Paragraph 4 1 4 below for an itemized description of these LEDs 1 2 3 4 1 2 3 4 ...

Page 111: ...3 Numeric Keypad A 10 Key Numeric Keypad with two additional keys for the Enter and Clear function allows the entry of data into the system Table 4 2 describes the functions available at the Front Panel Table 4 2 Edit Mode Key Functions Front Panel Only Parameter Type 0 9 Clear Clear Fixed Point Decimal Changes Digit Toggles If Signed Toggles If Signed Moves Cursor 1 Position Left Moves Cursor 1 P...

Page 112: ...arm Red Indicates that the Transmit Direction has failed losing traffic Minor Alarm Yellow Indicates that a Transmit Warning Condition exists Test Mode Yellow Indicates that the transmitter is involved in a current Test Mode activity Demodulator LED Indicators Signal Lock Green Indicates that the receiver locked to an incoming carrier and data including FEC Sync Major Alarm Red Indicates that the ...

Page 113: ...setting into the nonvolatile EEPROM making it available immediately and available the next time the unit is powered up 4 4 Front Panel Control Screen Menus The Front Panel Control Screens are broken down into sections under several Main Menus Menu items for LBST only will be in shaded text 4 4 1 Main Menus MODULATOR DEMODULATOR INTERFACE MONITOR ALARMS SYSTEM TEST IMPORTANT ...

Page 114: ...e with the desired mode of operation or the network spec will not be allowed The following parameters cannot be changed while the unit is in the given mode of operation IDR IESS 308 For Data rates 1 544 2 048 6 312 8 448 Mbps Framing Type 96 Kbps IDR Scrambler Type V 35 Spectrum Mask Intelsat For Data Rates 1 544 Framing Type 1 15 IBS Scrambler Type IESS 309 Spectrum Mask Intelsat IBS IESS 309 For...

Page 115: ...dem in 1 Hz increments UPLINK FREQ Displays the output frequency of the BUC also referred to as Satellite uplink frequency The user must enter the BUC LO and OSC SIDE BAND before using this menu The UPLINK FREQUENCY is a calculated measurement of both the BUC LO and OSC SIDE BAND Once the menus are entered correctly the user can control the uplink Frequency from this menu POWER dBm 0 to 25 dBm All...

Page 116: ...QAM 3 4 7 8 DVB VIT 1 2 2 3 3 4 5 6 7 8 DVB Trellis 2 3 3 4 5 6 7 8 8 9 LDPC B O QPSK 1 2 2 3 3 4 LDPC 8PSK 8QAM 2 3 3 4 LDPC 16QAM 3 4 Allows the user to select the Tx Code Rate and Type TPC INTERLEAVER DISABLE ENABLE Allows user to disable or enable the TPC Interleaver Valid only for Radyne Legacy turbo codes TPC 495 and TPC 793 DIFF CODING ENABLED DISABLE Allows the user to enable or disable th...

Page 117: ... Use DATA POLARITY to invert the Tx Data polarity if necessary If other brands of equipment are used with this unit data polarity inversion may be required BPSK SYMB PAIR NORMAL SWAPPED Allows the user to swap the I Q Channels when using BPSK modulation ESC OVERHEAD VOICE X2 DATA 64KBPS IDR ESC Channel used for Voice or 64 K data channel Only available when IDR Network is selected REED SOLOMON men...

Page 118: ...BUC the unit will display a fault BUC OUTPUT Enabled Disabled Allows the user to enable or disable the BUC output LO FREQ MHz Allows the user to enter the Local Oscillator frequency of the BUC LO in order for the uplink frequency to be displayed correctly refer to the BUC manufacturer s specifications When utilizing BUC that supports FSK the modem will display LO frequency as stated by the BUC OSC...

Page 119: ...sable Only available when the FSK Comm is Enabled Enables or Disables the BUC RF Output FSK TEST NONE LOOPBACK CYCLE TX ENABLE QUERY FOR ADDRESS PASS THRU Only available when the FSK Comm is Enabled NONE This is the none FSK operational mode LOOPBACK The FSK will initiate an internal loopback test of the FSK transmitter and receiver verifying that the modem communication link is functioning proper...

Page 120: ...al level This nominal power should be set to a level high enough to re establish communications regardless of rain fade NOMINAL TX POWER 0 TO 25 dB This allows the user to set the nominal Transmit Power The nominal transmit power is the default output power level MINIMUM TX POWER 0 to 25 dB This allows the user to set the minimum Transmit Power EFDATA AUPC When configured for EFDATA AUPC the minim...

Page 121: ...o increase or decrease transmit power TRACKING RATE 0 5 to 6 0 Allows the user to set the rate at which the commands to increase or decrease Transmit Power are sent Each command will result in a 0 5 dB increase or decrease in Transmit Power from the remote transmitter The tracking rate is adjustable from 0 5 dB per minute to 6 0 dB per minute in 0 5 dB steps Only available when EFAUPC is selected ...

Page 122: ...emote modem upon receiver loss of lock LOOPBACK DISABLE ENABLE Allows the user to enable or disable the Baseband Loopback Test Mode of the remote modem TX 2047 TEST DISABLE ENABLE Allows the user to enable or disable the Transmit 2047 Pattern Test Mode of the remote modem RX 2047 BER Reports the BER measurement of the receiver 2047 Pattern Test Mode of the remote modem BER is reported from the 1x1...

Page 123: ...allowed The following parameters cannot be changed while the unit is in the given mode of operation IDR IESS 308 For Data rates 1 544 2 048 6 312 8 448 Mbps Framing Type 96 Kbps IDR Descrambler type V 35 Spectrum Mask Intelsat For Data Rates 1 544 Mbps Framing Type 1 15 IBS Descrambler Type IESS 309 Spectrum Mask Intelsat IBS IESS 309 For Data Rates 2 048 Mbps Framing Type 1 15 IBS Descrambler Typ...

Page 124: ...NB before using this menu The DOWNLINK FREQUENCY is a calculated measurement of both the LNB LO and OSC SIDE BAND Once the menus are entered correctly the user can control the downlink Frequency from this menu SPECTRUM NORMAL INVERTED Allows the user to invert the direction of rotation for PSK Modulation Normal meets the IESS Specification LBST Spectral inversion may be required if the LNB LO is h...

Page 125: ...adjust the low level threshold limit for input power Input power level below the threshold limit will trigger a major alarm on the demodulator EB NO ALARM 0 0 to 9 90 db Allows the user to set the desired Eb No for the local receiver This setting is compared against the receive Eb No and commands to the remote modem to increase or decrease Transmit Power accordingly are sent DATA menu DATA RATE bp...

Page 126: ...LER CTRL ON OFF Allows the user to enable or disable the descrambler operation SAT FRAMING 1 15 IBS 1 15 Async 96 Kbps IDR EDMAC EFAUPC SCC EFFICIENT D I None Used with IDR IBS or Asynchronous Interface Only Allows the user to select the Framing Type IN BAND RATE 150 300 600 1200 2400 4800 9600 19200 Allows the user to select the rate of in band data for the ES to ES Async overhead channel Only di...

Page 127: ...r for the downlink frequency to be displayed correctly refer to the LNB manufacturer s specifications OSC SIDE BAND LOW SIDEBAND HIGH SIDEBAND Allows the user to select the location of the LNB LO The user must enter the location of the LNB LO in order for the UPLINK FREQUENCY to be displayed correctly The LNB LO can be either higher or lower in frequency than the LNB output frequency If the LNB LO...

Page 128: ...FACES M2P PARALLEL DVB PARALLEL ASI HSSI ETHERNET 10 100 BASE T ETHERNET 10 100 1000 BASE T G 703 T1 AMI T1 B8ZS E1 BAL E1 UNBAL T2 BAL T2 UNBAL E2 Allows the user to select the Transmit Interface Type ETH FLOW CONTROL Disabled Enabled Allows the user to disable or enable flow control Only visible when Ethernet is selected as the interface type ETH DAISY CHAIN Disabled Enabled Allows the user to d...

Page 129: ...k SCR is the Rx Satellite clock SCR is used for loop timing DROP INSERT menu Reference Section 3 14 Drop and Insert Mapping in this manual DROP MODE NONE T1 D4 T1 ESF PCM 30 PCM 30C PCM 31 PCM 31C T1 D4 S T1 ESF S Drop mode may only be changed from none when the drop and insert specification is in use MAP COPY SRC Map Dest Map Allows the user to copy drop and insert maps Tx Act map is the drop map...

Page 130: ...n priorities to the clock sources 1 being the highest priority and 5 being the last resort The menu has three fields the first field is the name of the clock source the second field is the priority entry area and the last field is the depth of the list In the priority field the up down arrow keys will scroll through the list displaying the names and the current priority When the desired clock name...

Page 131: ...selection cannot be changed DROP INSERT menu INSERT MODE NONE T1 D4 T1 ESF PCM 30 PCM 30C PCM 31 PCM 31C T1 D4 S T1 ESF S Allows the user to select any of the above T1 E1 FRAME SRC INTERNAL EXTERNAL Selects the frame source for T1 or E1 framing TERR STREAMING BYTE OUTPUT PACKET OUTPUT ASI only Byte output continuous Packet output burst ESC CHAN 1 dB 20 to 10 dB Allows user to select ESC Voice Chan...

Page 132: ...al IBS Async Channel ESC Enhanced can be selected in Closed Net and uses the Overhead Signaling bytes in the IBS Overhead to pass asynchronous data This menu is not available when SCC is selected ES INTERFACE RS 232 RS 485 Allows the user to select the interface type ES BAUDRATE 150 1024 For IBS ES to ES 150 19200 For ES to ES Enhanced 150 115200 For SCC Communications ES to ES Fixed Baud Rate bas...

Page 133: ...of the Event Buffer by pressing CLEAR on the keypad INPUT LVL dBm Displays the estimated receive signal level as seen by the Demodulator FREQ OFFSET Displays the received carrier frequency offset as measured by the modem AGC VOLATAGE V Monitored AGC Value for use in external equipment such as Radios EBNO dB Displays the estimated Eb No as seen by the demodulator REMOTE EB NO Remote EB NO displayed...

Page 134: ...Unresolved Unable to agree on connection speed 10 Mbps Half Connected at 10 Base T Half Duplex 10 Mbps Full Connected at 10 Base T Full Duplex 100 Mbps Half Connected at 100 Base T Half Duplex 100 Mbps Full Connected at 100 Base T Full Duplex Unused The port is not available JS1 PORT See the note above Displays the current status of the LAN Port JS2 PORT See the note above Displays the current sta...

Page 135: ...TAGE Displays the measured voltage of the BUC ODU BUC menu POWER OUTPUT Displays the RF OUTPUT dBm of the BUC TEMPERATURE Displays the measured temperature of the BUC BUC SUMMARY Displays the BUC summary when information is supplied by the BUC The ODU BUC status menus are only displayed when BUC supports FSK and information is supplied by the BUC CnC menu CnC DELAY Routine delay ms CnC FREQ OFFST ...

Page 136: ...lem with the incoming clock to the modem SCTE LB SYNTH PLL Pass Fail Unmasked Masked Indicates that the Tx L Band Synthesizer is not locked This alarm will flash on during certain modem parameter changes A solid indication points toward a configuration problem within the modem IF SYNTH PLL Pass Fail Unmasked Masked Indicates that the Tx IF Synthesizer is not locked This alarm will flash on during ...

Page 137: ... and PCM 31C Modes TX DVB FRM LOCK Pass Fail Unmasked Masked Indicates that Tx input data stream framing does not match the user selected TX TERR FRAMING TX CLK SRC FALLBK Pass Fail Unmasked Masked Indicates that the clock resource has fallen TPC CONFLICT CHK Pass Fail Unmasked Masked Indicates that the TPC parameters are not configured correctly BUC PLL Pass Fail Unmasked Masked Indicates BUC PLL...

Page 138: ...dem SCTE LB SYNTH PLL Pass Fail Unmasked Masked Indicates that the Rx L Band Synthesizer is not locked This alarm will flash on during certain modem parameter changes A solid indication points toward a configuration problem within the modem IF SYNTH PLL Pass Fail Unmasked Masked Indicates that the Rx IF Synthesizer is not locked This alarm will flash on during certain modem parameter changes A sol...

Page 139: ...K Pass Fail Unmasked Masked Indicates if drop insert data has multiframe lock INSERT CRC Pass Fail Unmasked Masked Indicates if the Circular Redundancy Check is passing in PCM 30C and PCM 31C Modes T1 E1 SIGNALING Pass Fail Unmasked Masked The interface is unable to find the expected signaling information IFEC LOCK Pass Fail Unmasked Masked Indicates that the Framing Unit is unable to find the exp...

Page 140: ...ernal Reference activity EXT REF LOCK Pass Fail Unmasked Masked Indicates the External Reference PLL is locked detection ETHERNET WAN Pass Fail Unmasked Masked Displays the current status of the WAN VOLTAGES menu 1 5V RX SUPPLY Pass Fail Unmasked Masked Displays the measured voltage of the 1 5 Volt Rx power bus located inside the modem 1 5V TX SUPPLY Pass Fail Unmasked Masked Displays the measured...

Page 141: ...D ALARMS Pass Fail The following alarms are latched in order to catch intermittent failures TX MAJOR menu FPGA CFG DSP CFG SCT CLOCK PLL SYM CLOCK PLL LB SYNTH PLL IF SYNTH PLL BUC CURRENT BUC VOLTAGE ETHERNET WAN TX MINOR menu TERR CLK ACT TERR DATA ACT TX TERR AIS DnI FRAME LOCK DnI M FRAME LOCK DROP CRC TX DVB FRM LOCK TX CLKSRC FALLBK TPC CONFLICT CHK BUC PLL BUC OVER TEMP BUC SUMMARY BUC OUTP...

Page 142: ...HRESH FRAME LOCK MULTIFRAME LOCK LB SYNTH PLL IF SYNTH PLL ETHERNET WAN LNB CURRENT LNB VOLTAGE RX MINOR menu BUFF UNDERFLOW BUFF NEAR EMPTY BUFF NEAR FULL BUFF OVERFLOW RX DATA ACTIVITY SAT AIS DnI FRAME LOCK DnI M FRAME LOCK INSERT CRC T1 E1 SIGNALING IFEC LOCK TPC CONFLICT CHK OFEC LOCK INTERLEAVER RS UNCORR WORD TPC IFEC LOCK MISSING EBNO ...

Page 143: ...SUPPLY 12V SUPPLY 12V SUPPLY 20V SUPPLY CLEAR LATCHED ENTER Allows the user to reset the latched alarms by pressing ENTER on the keypad BACKWARD ALARMS The following IBS and IDR Backward alarms only apply if the IDR or IBS options are selected The IBS and IDR Backward Alarms are transmitted and received from the distant end of the satellite link NOTE The following alarms identify the status of the...

Page 144: ...T CNTRL STNDRD FRC ON FRC OFF STNDRD Set Alarm functions in a normal configuration FRC ON Forces an ON alarm status that is transmitted to the distant end FRC OFF Forces an OFF alarm status that is transmitted to the distant end IDR2 SAT CNTRL STNDRD FRC ON FRC OFF IDR3 SAT CNTRL STNDRD FRC ON FRC OFF IDR4 SAT CNTRL STNDRD FRC ON FRC OFF IBS SAT CNTRL STNDRD FRC ON FRC OFF T1E1 TERR CNTRL STNDRD F...

Page 145: ...heard LED TEST ENTER Allows user to test all front panel LEDs REMOTE CONTROL TERMINAL COMPUTER Allows the user to select between terminal RS 232 control and remote port M C RS 232 485 control TERMINAL menu TYPE VT 100 WYSE50 VIEWPOINT Allows the user to select the emulation type BAUD RATE 300 600 1200 2400 4800 9600 19200 38400 57600 115200 Allows the user to enter the terminal baud rate REMOTE PO...

Page 146: ...ttings as listed below Bootp Server Tag 206 IP Address Mask 255 255 255 000 FF FF FF 00 hex Modem IP Address 192 168 0 238 C0 A8 00 EE Server IP Address 192 168 000 101 C0 A8 00 65 Router IP Address 192 168 000 102 C0 A8 00 66 BOOTp SERVER 128 257 default is 206 Only used if Bootp is selected in Boot Mode Should be consistent with the tag expected by the users Bootp Server MODEM HOST The Host Mode...

Page 147: ...ay for the IP ADDRESS MASK MODEM IP ADDRESS SERVER IP ADDRESS AND ROUTER IP ADDRESS press all four arrow keys simultaneously MODEM EADDR 001065010000 Displays the Ethernet address of the device Set at the factory and is a unique identifier for the Ethernet physical interface ETHER RATE 10 MBPS HD The data rate for the local Ethernet Interface 10 Mbps HD for 10 Base T in either half duplex or full ...

Page 148: ... so RD COMMUNITY 16 characters of name This menu is only displayed when SNMP VERSION is set to V1 V2 This is the community that a host must be acting within when an OID variable is requested by a V1 V2 SNMP message RDWR COMMUNITY 16 characters of name This menu is only displayed when SNMP VERSION is set to V1 V2 This is the community that a host must be acting within when an OID variable is being ...

Page 149: ...tered using the up and down arrow keys Numeric characters can be selected by using the number keys on the front panel The user can clear all characters from the front panel screen USER RESET Resets group and password USER 2 ACCESS GROUP NO GROUP GUEST OPER ADMIN Access rights represent the following No Group Denies Access Guest Users are able to navigate most of the site and view modem parameter s...

Page 150: ...modems parameters change any user s name and authentication password and modify IP network settings Admin setting allows access to the entire site AUTH PASSWORD xxxxxxxx User to select password The user can modify the Authorization Passwords The user name can have up to 14 characters supporting alpha and numeric characters Alpha characters can be entered using the up and down arrow keys Numeric ch...

Page 151: ...umber for the IF Board Assembly AGC CTRL VALUE 0 100 Allows the user to adjust the internal frequency reference for calibration Only displayed if the system reference clock source is HI STABILITY I OFFSET Used for factory test only Q OFFSET Used for factory test only IF RX LVL OFFSET Used for factory test only LB RX LVL OFFSET Used for factory test only POWER SOURCE Used for factory test only TERR...

Page 152: ...ory test only ODU BUC menu Indicates information from BUC via FSK SERIAL NUMBER Indicates the Serial number of the BUC when supplied by the BUC via FSK ID INFO Indicates the BUC ID when supplied by the BUC via FSK FSK DEBUG IMAGE 0x00D669E5 FEATURES menu 5012 2840 2417 ____ ____ ____ Allows the user to install purchased feature upgrades see Appendix A Contact the Comtech EF Data Customer Service D...

Page 153: ...rors detected by the test pattern checker TST PATT BER NO SYNC nnnn x 10 n Displays the measured BER for the test pattern RESTART TST PAT ENTER Allows the user to restart the test by pressing ENTER on the keypad LOOPBACK WITH ETHERNET DATA INTERFACE Usage of the modems loopback capabilities in conjunction with the Ethernet data interface can produce undesirable network loops In order to run any ty...

Page 154: ...nt end BASEBAND RX Sends Rx data from the Modem Card to the Tx data input to the Modem Card TERR TX Sends Tx Terrestrial Data to Rx data out BASEBAND TX Sends Tx data to the receive input to the BB Card CARRIER TYPE NORMAL CW DUAL OFFSET POS FIR NEG FIR Allows the user to set the type of carrier NORMAL Causes the Modulator to output normal modulation CW Causes the Modulator to output a pure carrie...

Page 155: ... 1 Three terminal emulations are supported VT 100 WYSE 50 and ADDS VP is used for setting the screen when the terminal is used for the first time the non volatile memory is reset 4 5 2 Modem Setup for Terminal Mode Terminal Mode Communications and Protocol is set from the Front Panel Control by setting the Control Mode Parameter to Terminal and then setting the Modem Port Term Baud and Emulation P...

Page 156: ...by ENTER If the parameter to be changed requires a numeric value enter the number followed by ENTER If the parameter is non numeric press SPACE to cycle through the list of available entries Items that do not have ID numbers are Status only and cannot be changed 4 7 Connecting the Terminal 1 Connect the computer to the Remote Connector J20 on the rear of the unit using the RS 232 Cable 2 Enable th...

Page 157: ... unit unless otherwise specified 5 1 DMD20 DMD20 LBST Connections All DMD20 DMD20 LBST connections are made to labeled connectors located on the rear of the unit refer to Figure 5 1 for the DMD20 and Figure 5 2 for the DMD20 LBST The connector definitions below are those on the DMD20 DMD20 LBST unit Any connection interfacing to the DMD20 DMD20 LBST must be the appropriate mating connector ...

Page 158: ...DMD20 20LBST Universal Satellite Modem Rear Panel Interfaces MN DMD20 20LBST Revision 14 5 2 Figure 5 1 DMD20 Universal Satellite Modem Rear Panel Configuations ...

Page 159: ...DMD20 20LBST Universal Satellite Modem Rear Panel Interfaces MN DMD20 20LBST Revision 14 5 3 Figure 5 2 DMD20LBST Universal Satellite Modem Rear Panel Configurations ...

Page 160: ...t Switch The Optional DC Power Input and Switch Figure 5 1 is available for all DMD20 DMD20 LBST products The unit may be powered from a 36 75 VDC source with a maximum unit power consumption of 3 A Refer to Table 5 1 for pinouts Table 5 1 DC Power A B Ground C 5 4 DMD20 Chassis Connections Standard 5 4 1 EXT REF J10 The External Reference Port is a 50 Ohm Female BNC Connector and will accept the ...

Page 161: ...the contact closures for Prompt and Service can be utilized to include the summary of all minor alarms or minor major alarms This option can be enable via the BB Relays located in the General menu The IBS Prompt menus can include TX Minor Alarms or TX Minor Alarm and TX Major Alarms The IBS Service Alarms can include RX Minor Alarms or RX Minor Alarms and RX Major Alarms Additional support of the ...

Page 162: ...dyne App Note 230 for addition information on utilizing this feature as Keyline Operation 5 4 7 EXT CLK J16 The External Clock Port is a 75 Ohm Female BNC Connector It allows interfacing to an external clock source 5 4 8 ASYNC J17 The Asynchronous Data Interface Port is a 9 Pin Female D Connector Refer to Table 5 3 for pinouts Table 5 3 ASYNC Port 9 Pin Female D Connector J17 Pin No Signal Name Si...

Page 163: ...5 Clear To Send A CS A Output 6 Data Mode A DM A Output 7 Signal Ground SGND 8 Receiver Ready A RR A Output 9 Receive Timing B RT B Output 10 Receiver Ready B RR B Output 11 Terminal Timing B TT B Input 12 Send Timing B ST B Output 13 Clear T Send B CS B Output 14 Send Data B SD B Input 15 Send Timing A ST A Output 16 Receive Data B RD B Output 17 Receive Timing A RT A Output 18 Modulator Fault Op...

Page 164: ... Input 4 NC NC 5 Ground GND 6 Transmit Data RS 485 TX 485 A Output 7 NC No Connection 8 Receive Data RS 485 RX 485 B CTS Input 9 Receive Data RS 485 RX 485 A Input When operating the remote port as RS232 using a cable pinned 1 for 1 may cause communication failures due to miss routing of standard RS232 com port signals When operating the remote port as RS232 the cable used should only have pins 2 ...

Page 165: ...ly support IBS Service Alarms If the Network specification is configured for Closed Net the contact closures for Prompt and Service can be utilized to include the summary of all minor alarms or minor major alarms This option can be enable via the BB Relays located in the General menu The IBS Prompt menus can include TX Minor Alarms or TX Minor Alarm and TX Major Alarms The IBS Service Alarms can i...

Page 166: ...vice and Rx minor and Rx Major Alarms Note 4 Service alarms can be configured to support the RTS Carrier Alarms Refer to Radyne App Note 230 for addition information on utilizing this feature as Keyline Operation 5 5 5 EXT CLK J16 The External Clock Port is a 75 Ohm Female BNC Connector It allows interfacing to an external clock source Input level 5 to 5 volts Peak to Peak 5 5 6 ASYNC J17 The Asyn...

Page 167: ...5 Clear To Send A CS A Output 6 Data Mode A DM A Output 7 Signal Ground SGND 8 Receiver Ready A RR A Output 9 Receive Timing B RT B Output 10 Receiver Ready B RR B Output 11 Terminal Timing B TT B Input 12 Send Timing B ST B Output 13 Clear T Send B CS B Output 14 Send Data B SD B Input 15 Send Timing A ST A Output 16 Receive Data B RD B Output 17 Receive Timing A RT A Output 18 Modulator Fault Op...

Page 168: ...ransmit Data RS 232 TXD 232 Output 3 Receive Data RS 232 RXD 232 Input 4 NC NC 5 Ground GND 6 Transmit Data RS 485 TX 485 A Output 7 NC No Connection 8 Receive Data RS 485 RX 485 B CTS Input 9 Receive Data RS 485 RX 485 A Input 5 5 10 ETHERNET J21 The Ethernet Port J21 can be used for the Monitor Control M C Functions of the unit The physical interface is a standard female RJ 45 Connector Refer to...

Page 169: ...d Alarm Out 2 NO ESCBWO 2NO N A 5 No Connection NC 6 Backward Alarm Out 3 NO ESCBWO 3NO N A 7 Ground GND 8 Backward Alarm Out 4 NO ESCBWO 4NO N A 9 No Connection NC 10 Backward Alarm In 2 ESCBWI 2 Input 11 Backward Alarm In 4 ESCBWI 4 Input 12 No Connection NC 13 No Connection NC 14 Backward Alarm Out 1 C ESCBWO 1C N A 15 Backward Alarm Out 1 NC ESCBWO 1NC N A 16 Backward Alarm Out 2 C ESCBWO 2C N...

Page 170: ...ve Audio 1A ESCAUDRX 1A Output 3 Ground GND 4 Transmit Audio 2B ESCAUDTX 2B Input 5 Receive Audio 2B ESCAUDRX 2B Output 6 Transmit Audio 1B ESCAUDTX 1B Input 7 Receive Audio 1B ESCAUDRX 1B Output 8 Transmit Audio 2A ESCAUDTX 2A Input 9 Receive Audio 2A ESCAUDRX 2A Output Table 5 7b 64K AUDIO In 64K Mode Port 9 Pin Female D Connector J2 Pin No Signal Name Signal Direction 1 Send Data A SD A Input 2...

Page 171: ...onnector J3 Pin No Signal Name Signal Direction 1 Receive Octet B ESCRXO B Output 2 Receive Clock B ESCRXC B Output 3 Receive Data B ESCRXD B Output 4 No Connection NC 5 No Connection NC 6 Transmit Data A ESCTXD A Input 7 Transmit Clock A ESCTXC A Output 8 Transmit Octet A ESCTXO A Output 9 Receive Octet A ESCRXO A Output 10 Receive Clock A ESCRXC A Output 11 Receive Data A ESCRXD A Output 12 Grou...

Page 172: ...in No Signal Name Signal Direction 1 Send Data SD A Input 2 Ground GND 3 Receive Data A RD A Output 4 Ground GND 5 Drop Data Out DDO B Output 6 Insert Data In EXC IDI B Input 7 External Clock A BAL EXC A Input 8 External Clock B BAL EXC B Input 9 Send Data SD B Input 10 No Connection 11 Receive Data B RD B Output 12 Drop Data Out DDO A Output 13 Insert Data In EXC IDI A Input 14 Mod Fault MOD FLT ...

Page 173: ...Backward Alarm Out 2 Normally Closed ESCBWO 2NC No Direction 9 G 703 Drop Data Out A Synchronous Data Receive Timing Output A DDO A RT A Output 10 IDR ESC Backward Alarm Output 3 Common ESCBWO 3C No Direction 11 G 703 Insert Data Out A Synchronous Data Receive Data A IDO A RD A Output 12 IDR ESC Backward Alarm Output 3 Normally Open ESCBWO 3NO No Direction 13 External Clock Input A BAL EXC A No Co...

Page 174: ...Output 32 IBS Receive Octet Output A RXO A Output 33 Synchronous Data Request to Send A SYNC RS A Input 34 Synchronous Data Receiver Ready A SYNC RR A Output 35 G 703 Send Data Input B G703B SD B Input 36 Synchronous Data Send Data Input B SYNC SD B Input 37 IDR ESC Backward Alarm Out 1 Normally Closed ESCBWO 1 NC No Direction 38 G 703 Insert Data Input B G703B IDI B Input 39 Synchronous Data Send...

Page 175: ... ES Transmit Data B IDR ESC Backward Alarm Input 2 TX B BWI 2 Input 55 Demod Fault Open Collector Output DMD FLT Output Open Collector 56 IBS ES Receive Data Input B ES RXD B Output 57 Ground GND 58 IDR ESC Transmit 8 Kbps Output Clock B ESCTXC B Output 59 IDR ESC Transmit 8 Kbps Output Data B ESCTXD B Input 60 IDR ESC Receive 8 Kbps Clock Output B ESCRXC B Output 61 IDR ESC Receive 8 Kbps Data Ou...

Page 176: ...Data Insert Data Out Port Unbalanced is a 75 Ohm Female BNC Connector 5 9 Ethernet Data Interface Optional The optional modem Ethernet Data Interface provides four RJ 45 10 100 Base T interface The Ethernet interface supports Auto Crossover and Auto Sensing The Ethernet port are referred to as JS1 through JS4 JS1 is Port 1 JS2 is Port 2 JS3 is Port 3 JS4 is Port 4 Refer to Figure 5 1 and 5 2 for o...

Page 177: ...round 2 27 RT Receive Timing Output 3 28 CA DCE Available Output 4 29 RD Receive Data Output 6 31 ST Send Timing SCT Output 7 32 SG Signal Ground 8 33 TA DTE Available Input 9 34 TT Terminal Timing SCTE Input 11 36 SD Send Data Input 13 38 SG Signal Ground 14 18 39 43 5 Ancillary to DCE Reserved Input 19 44 SG Signal Ground 20 23 45 48 4 Ancillary from DCE Reserved Output 24 49 TM Test Mode Output...

Page 178: ...a for DVB and 5 12 b for M2P pinouts for this connector Table 5 12a J3 DVB In 25 Pin Female Pin Number Signal Name Direction 1 CLK Input 14 CLK Input 2 SYSTEM GND Input 15 SYSTEM GND Input 3 D7 Input 16 D7 Input 4 D6 Input 17 D6 Input 5 D5 Input 18 D5 Input 6 D4 Input 19 D4 Input 7 D3 Input 20 D3 Input 8 D2 Input 21 D2 Input 9 D1 Input 22 D1 Input 10 D0 Input 23 D0 Input 11 DVALID Input 24 DVALID ...

Page 179: ...r Signal Name Direction 1 OUTCLK Output 14 OUTCLK Output 2 CLK Input 15 CLK Input 3 SYNC Input 16 SYNC Input 4 VALID Input 17 VALID Input 5 D0 Input 18 D0 Input 6 D1 Input 19 D1 Input 7 D2 Input 20 D2 Input 8 D3 Input 21 D3 Input 9 D4 Input 22 D4 Input 10 D5 Input 23 D5 Input 11 D6 Input 24 D6 Input 12 D7 Input 25 D7 Input 13 Cable Shield ...

Page 180: ... 13 b for M2P pinouts for this connector Table 5 13a J3 DVB Out 25 Pin Female D Sub Connector Pin Number Signal Name Direction 1 CLK Output 14 CLK Output 2 SYSTEM GND Output 15 SYSTEM GND Output 3 D7 Output 16 D7 Output 4 D6 Output 17 D6 Output 5 D5 Output 18 D5 Output 6 D4 Output 19 D4 Output 7 D3 Output 20 D3 Output 8 D2 Output 21 D2 Output 9 D1 Output 22 D1 Output 10 D0 Output 23 D0 Output 11 D...

Page 181: ...ber Signal Name Direction 1 NC Output 14 NC Output 2 CLK Output 15 CLK Output 3 SYNC Output 16 SYNC Output 4 VALID Output 17 VALID Output 5 D0 Output 18 D0 Output 6 D1 Output 19 D1 Output 7 D2 Output 20 D2 Output 8 D3 Output 21 D3 Output 9 D4 Output 22 D4 Output 10 D5 Output 23 D5 Output 11 D6 Output 24 D6 Output 12 D7 Output 25 D7 Output 13 Cable Shield ...

Page 182: ...terface J1 complies with the HSSI Functional and Electrical Specifications The physical interface is a 50 Pin SCSI 2 Type Connector Electrical levels are ECL Gapped clocking not supported The pinouts for this interface are listed in Table 5 14 Table 5 14 J1 HSSI High Speed Serial Interface 50 Pin Connector Pin No Pin No Signal Name Description Direction 1 26 SG Signal Ground 2 27 RT Receive Timing...

Page 183: ...ive Audio 1A ESCAUDRX 1A Output 3 Ground GND 4 Transmit Audio 2B ESCAUDTX 2B Input 5 Receive Audio 2B ESCAUDRX 2B Output 6 Transmit Audio 1B ESCAUDTX 1B Input 7 Receive Audio 1B ESCAUDRX 1B Output 8 Transmit Audio 2A ESCAUDTX 2A Input 9 Receive Audio 2A ESCAUDRX 2A Output Table 5 15b 64K AUDIO In 64K Mode Port 9 Pin Female D Connector J2 Pin No Signal Name Signal Direction 1 Send Data A SD A Input...

Page 184: ...tput 10 Receive Clock A ESCRXC A Output 11 Receive Data A ESCRXD A Output 12 Ground GND 13 Transmit Data B ESCTXD B Input 14 Transmit Clock B ESCTXC B Output 15 Transmit Octet B ESCTXO B Output 5 13 3 G 703 BAL J4 The G 703 Interface Port Balanced is a 15 pin female D connector Table 5 17 gives pinouts Table 5 17 G 703 BAL Port 15 Pin Female D Connector J4 Pin No Signal Name Signal Direction 1 Sen...

Page 185: ...CBWI 2 Input 11 Backward Alarm In 4 ESCBWI 4 Input 12 No Connection NC 13 No Connection NC 14 Backward Alarm Out 1 C ESCBWO 1C N A 15 Backward Alarm Out 1 NC ESCBWO 1NC N A 16 Backward Alarm Out 2 C ESCBWO 2C N A 17 Backward Alarm Out 2 NC ESCBWO 2NC N A 18 Backward Alarm Out 3 C ESCBWO 3C N A 19 Backward Alarm Out 3 NC ESCBWO 3NC N A 20 Backward Alarm Out 4 C ESCBWO 4C N A 21 Backward Alarm Out 4...

Page 186: ...inouts for this interface are listed in Table 5 19 Table 5 19 J1 HSSI High Speed Serial Interface 50 Pin Connector Pin No Pin No Signal Name Description Direction 1 26 SG Signal Ground 2 27 RT Receive Timing Output 3 28 CA DCE Available Output 4 29 RD Receive Data Output 6 31 ST Send Timing SCT Output 7 32 SG Signal Ground 8 33 TA DTE Available Input 9 34 TT Terminal Timing SCTE Input 11 36 SD Sen...

Page 187: ...nal Ethernet Data Interface provides four RJ 45 10 100 Base T interface The Ethernet interface supports Auto Crossover and Auto Sensing The Ethernet port are referred to as JS1 through JS4 JS1 is Port 1 JS2 is Port 2 JS3 is Port 3 JS4 is Port 4 Refer to Figure 5 1 and 5 2 for outline and Appendix J for setup configuration See Note 1 ...

Page 188: ...orts Auto Crossover and Auto Sensing The Ethernet port are referred to as JS1 through JS4 or JS1 through JS3 Refer to Figures 5 1 and 5 2 for rear panel configurations JS1 is Port 1 JS2 is Port 2 JS3 is Port 3 Refer to Figure 5 1 and 5 2 for outline and Appendix J for setup configuration See Note 1 Note 1 The DMD20 20LBST supports Radyne HDLC and Comtech HDLC modes offering compatibility with the ...

Page 189: ...ase and replacement is not intended in the field 6 1 1 Clock Adjustment The modem allows for VCO speed adjustment from the front panel Clock adjustment should be performed only when an internal clock source has insufficient accuracy for the custom modem application 6 2 Troubleshooting Should a unit be suspected of a defect in field operations after all interface signals are verified the correct pr...

Page 190: ...ates that the Tx SCT Clock PLL is not locked This alarm will flash on during certain modem parameter changes A solid indication points toward a configuration problem within the modem SYM Clock PLL Indicates that the Tx Symbol Clock PLL is not locked This alarm will flash on during certain modem parameter changes A solid indication points toward a problem with the incoming clock to the modem SCTE L...

Page 191: ...solid indication points toward a configuration problem within the modem Ethernet WAN Indicates that the WAN Port is down 6 2 1 3 Minor Tx Alarms Alarm Possible Cause TERR CLK ACT Indicates no Terrestrial Clock activity TERR DATA ACT Indicates no Tx Data activity TX TERR AIS Indicates that AIS has been detected in the Tx Data Stream DnI FRAME LOCK When running Drop Mode indicates that the framing u...

Page 192: ...ert data is frame locked DnI M FRAME LOCK Indicates if drop insert data has multiframe lock INSERT CRC Indicates if the Circular Redundancy Check is passing in PCM 30C and PCM 31C Modes T1 E1 SIGNALING Indicates that the T1 E1 Signal is not locked IFEC LOCK Indicates that the Inner Codec is not locked OFEC LOCK Indicates that the Reed Solomon Decoder is not locked INTERLEAVER Indicates that the Re...

Page 193: ...re probably caused by a missing or wrong file CODEC FPGA CFG Indicates Turbo Codec Card FPGA configuration failure probably caused by a missing or wrong file 1 5V RX SUPPLY Displays the measured voltage of the 1 5 Volt Rx power bus located inside the modem 1 5V TX SUPPLY Displays the measured voltage of the 1 5 Volt Tx power bus located inside the modem 3 3V SUPPLY Displays the measured voltage of...

Page 194: ...may flash briefly during modem configuration changes and during power up but should not stay illuminated Alarms are grouped into Transmit and Receive Alarms Transmit and Receive are completely independent 6 2 2 1 2 Minor Alarms Minor Alarms indicate that a problem may persist outside the modem such as loss of Terrestrial Clock loss of terrestrial data activity or a detected transmit or receive AIS...

Page 195: ...p 6 2 2 3 Backward Alarms Backward Alarms are alarms that are fed back to or received from the other end of the satellite link In IBS Mode including Drop Insert Backward Alarm 1 is the only one used It would be received if the distant end demod drops lock 6 3 IBS Fault Conditions and Actions Figure 6 1 and Table 6 1 illustrate the IBS Fault Conditions and Actions to be taken at the Earth Station a...

Page 196: ...SO Yellow Alarm AH2 1 in Bit 3 of NFAS TSO Yellow Alarm AH2 1 in Bit 3 of NFAS TSO Yellow Alarm Action to Satellite Across Interface D AD1 AIS in Relevant TSs AD3 1111 in RelevantTS16 s AD1 AIS in Relevant TSs AD3 1111 in Relevant TS16 s AD1 AIS in Relevant TSs AD2 1 in Bit 3 of Byte 32 Fault Detected From Satellite Across Interface E FA1 Loss of Satellite Signal Input FA2 Loss of Satellite Frame ...

Page 197: ...put Power 0 to 25 dB Output Stability IF 0 5 dB Over Time and Temperature L Band 1 0 dB Over Time and Temperature Output Spectrum Meets IESS 308 309 310 Power Spectral Mask Spurious 50 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 CCITT V 35 or IBS Others Optional FEC Viterbi 1 2 3 4 7 8 None K 7 Sequential 1 2 3 4 7 8 CSC 3 4 Trellis...

Page 198: ...in 1 Hz Steps Impedance IF 75 Ohm 50 Ohm optional L Band 50 Ohm Connector BNC 75 Ohm SMA 50 Ohm N type 50 Ohm LBST Return Loss IF 20 dB Minimum SMA 50 Ohm L Band L Band 14 dB Minimum Spectrum INTELSAT IESS 308 309 310 Compliant Input Level 10 x log Symbol Rate 100 12 dB Adjacent Channel Rejection Ratio 10 dBc Total Input Power 10 dBm or 40 dBc the Lesser 256 Kbps FEC Viterbi 1 2 3 4 7 8 None K 7 S...

Page 199: ...ne 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 Terre...

Page 200: ...th IEEE 802 3 and IEEE 802 3u 7 14 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 7 15 HSSI G703 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 B...

Page 201: ...Non DVB Modulation Code Rate Min Data Rate Max Data Rate Option Card BPSK NONE 4800 10000000 BPSK VIT 1 2 2400 5000000 BPSK VIT 3 4 3600 7500000 BPSK VIT 7 8 4200 8750000 BPSK SEQ 1 2 2400 2048000 BPSK SEQ 3 4 3600 2048000 BPSK CSEQ 3 4 3600 2048000 BPSK SEQ 7 8 4200 2048000 BPSK TPC 21 44 2400 4772727 Supercard BPSK TPC 495 2376 4900000 Supercard BPSK TPC 793 3806 6300000 Supercard BPSK TPC 3 4 4...

Page 202: ...0000 OQPSK VIT 1 2 4800 10000000 OQPSK VIT 3 4 7200 15000000 OQPSK VIT 7 8 8400 17500000 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 495 4752 6312000 Supercard OQPSK TPC 793 7612 6312000 Supercard OQPSK LDPC 1 2 18000 10000000 LDPC TPC Card...

Page 203: ... Supercard 16QAM TPC 793 15225 6312000 Supercard 16QAM TPC 3 4 54000 20000000 LDPC TPC Card 16QAM TPC 7 8 63000 20000000 LDPC TPC Card 16QAM LDPC 3 4 54000 20000000 LDPC TPC Card 7 19 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 9166...

Page 204: ...6127450 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 ...

Page 205: ...Figure 7 1 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 0 1 2 3 4 5 6 7 8 9 10 11 12 Eb No in dB BER Viterbi Decoder Specification 1 2 Rate Specification 3 4 Rate Specification 7 8 Rate Typical Performance B O QPSK Uncoded Theory ...

Page 206: ...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 Eb No in dB BER Sequential Decoder Specification 1 2 Rate Specification 3 4 Rate Specification 7 8 Rate Typical Performance B O QPSK Uncoded Theory ...

Page 207: ...ed Solomon Figure 7 3 B O QPSK BER Performance Viterbi w R S 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 Eb No in dB BER Viterbi Decoder Reed Solomon Specification 1 2 Rate Specification 3 4 Rate Typical Performance B O QPSK Uncoded Theory ...

Page 208: ... 20 4 BER Performance O QPSK Turbo Figure 7 4 BPSK O QPSK BER Performance Turbo 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 Eb No in dB BER Turbo Decoder Specification Turbo 1 2 Specification Turbo 3 4 Typical Performance B O QPSK Uncoded Theory Specification Turbo 7 8 ...

Page 209: ... Turbo Figure 7 5 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 0 1 2 3 4 5 6 7 8 9 10 11 12 Eb No in dB BER Turbo Decoder Specification Turbo 0 495 Specification Turbo 0 793 Typical Performance B O QPSK Uncoded Theory ...

Page 210: ...vision 14 7 14 7 20 6 BER Performance 8PSK Turbo Figure 7 6 BPSK 8PSK BER Performance Turbo 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 Eb No in dB BER Turbo Decoder Specification Turbo 3 4 Typical Performance 8PSK Uncoded Theory Specification Turbo 7 8 ...

Page 211: ...lis Figure 7 7 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 Eb No in dB BER Trellis Decoder Specification 2 3 Rate Specification 2 3 Rate w RS Typical Performance 8PSK Uncoded Theory ...

Page 212: ...erformance 8PSK Turbo Figure 7 8 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 0 1 2 3 4 5 6 7 8 9 10 11 12 Eb No in dB BER Turbo Decoder Specification Turbo 0 793 Typical Performance 8PSK Uncoded Theory ...

Page 213: ...i Figure 7 9 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 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Eb No in dB BER Viterbi Decoder Specification 3 4 Rate Specification 7 8 Rate Typical Performance 16QAM Uncoded Theory ...

Page 214: ...omon Figure 7 10 BPSK 16QAM BER Performance Viterbi w R S 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 13 14 15 Eb No in dB BER Viterbi Decoder Reed Solomon Specification 3 4 Rate w RS Specification 7 8 Rate w RS Typical Performance 16QAM Uncoded Theory ...

Page 215: ...ce 16QAM Turbo Figure 7 11 BPSK 16QAM 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 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Eb No in dB BER Turbo Decoder Turbo 0 495 Turbo 0 793 Typical Performance 16QAM Uncoded Theory ...

Page 216: ...14 7 20 7 20 12 BER Performance 16QAM Turbo Figure 7 12 BPSK 16QAM BER Performance Turbo 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 13 14 15 Eb No in dB BER Turbo Decoder Specification Turbo 3 4 Typical Performance 16QAM Uncoded Theory Specification Turbo 7 8 ...

Page 217: ... 20 13 1 2 Rate B O QPSK BER Performance LDPC Figure 7 13 Rate 1 2 B O QPSK BER Performance LDPC 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 1 2 Rate LDPC Decoder Typical Performance B O QPSK Uncoded Theory Specification 1 2 Rate B O QPSK Uncoded Theory ...

Page 218: ...8PSK 8QAM BER Performance LDPC Figure 7 14 Rate 2 3 Q 8PSK 8QAM BER Performance LDPC 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 2 3 Rate LDPC Decoder Typical Performance 8PSK Uncoded Theory 8QAM Specification B O QPSK Uncoded Theory 8PSK Specification QPSK Specification ...

Page 219: ...MD20 20LBST Universal Satellite Modem Technical Specifications MN DMD20 20LBST Revision 14 7 23 7 20 15 3 4 Rate Q 8PSK 8 16QAM BER Performance LDPC Figure 7 15 Rate 3 4 Q 8PSK 8QAM BER Performance LDPC ...

Page 220: ...8 2 dB 9 7 dB 11 dB 7 4 dB 9 1 dB 10 dB 1E 10 9 dB 10 3 dB 11 7 dB 8 1 dB 9 8 dB 10 5 dB BER Table 7 1 B O QPSK BER Performance Viterbi Specification Typical 1 2 Rate 3 4 Rate 7 8 Rate 1 2 Rate 3 4 Rate 7 8 Rate 1E 3 3 3 dB 5 1 dB 3 dB 4 3 dB 5 3 dB 1E 4 3 5 dB 5 3 dB 3 2 dB 4 5 dB 5 7 dB 1E 5 3 8 dB 5 4 dB 6 5 dB 3 4 dB 4 7 dB 6 dB 1E 6 4 1 dB 5 6 dB 6 7 dB 3 6 dB 4 9 dB 6 4 dB 1E 7 4 2 dB 5 8 dB...

Page 221: ...ate 2 3 Rate w RS 1E 3 6 2 dB 5 2 dB 4 8 dB 4 9 dB 1E 4 7 dB 5 5 dB 5 6 dB 5 1 dB 1E 5 7 8 dB 5 8 dB 6 4 dB 5 4 dB 1E 6 8 7 dB 6 2 dB 7 2 dB 5 6 dB 1E 7 9 5 dB 6 5 dB 8 1 dB 5 8 dB 1E 8 10 2 dB 6 7 dB 8 9 dB 6 1 dB 1E 9 11 1 dB 6 9 dB 9 7 dB 6 3 dB 1E 10 11 9 dB 7 3 dB 10 5 dB 6 6 dB BER Specification Typical Table 7 5 8PSK BER Performance Trellis Turbo 0 495 Turbo 0 793 Turbo 0 495 Turbo 0 793 1E...

Page 222: ... 12 7 dB 1E 8 13 3 dB 14 3 dB 12 5 dB 13 5 dB 1E 9 14 2 dB 15 1 dB 13 4 dB 14 3 dB 1E 10 15 dB 15 9 dB 14 2 dB 15 1 dB Typical BER Specification Table 7 7 16QAM BER Performance Viterbi Turbo 0 495 Turbo 0 793 Turbo 0 495 Turbo 0 793 1E 3 TBD TBD 5 6 dB 7 dB 1E 4 TBD TBD 6 1 dB 7 4 dB 1E 5 TBD TBD 6 6 dB 7 8 dB 1E 6 TBD TBD 7 dB 8 2 dB 1E 7 TBD TBD 7 5 dB 8 6 dB 1E 8 TBD TBD 8 dB 9 dB 1E 9 TBD TBD ...

Page 223: ...dB 5 2 dB 6 3 dB 1E 4 5 8 dB 6 8 dB 5 4 dB 6 4 dB 1E 5 6 dB 6 9 dB 5 6 dB 6 5 dB 1E 6 6 2 dB 7 dB 5 8 dB 6 6 dB 1E 7 6 4 dB 7 1 dB 6 dB 6 7 dB 1E 8 6 8 dB 7 2 dB 6 3 dB 6 8 dB Table 7 11 8PSK BER Performance Turbo BER Specification Typical Turbo 3 4 Turbo 7 8 Turbo 3 4 Turbo 7 8 1E 3 6 3 dB 7 8 dB 6 dB 7 4 dB 1E 4 6 7 dB 7 9 dB 6 4 dB 7 5 dB 1E 5 7 dB 8 dB 6 7 dB 7 6 dB 1E 6 7 4 dB 8 1 dB 7 1 dB 7...

Page 224: ... 7 6 6 dB 8 2 dB 9 3 dB 5 9 dB 6 9 dB 7 3 dB 8 6 dB 1E 8 7 1 dB 8 7 dB 10 2 dB 6 4 dB 7 5 dB 7 8 dB 9 4 dB 7 20 16 AGC Output Voltage The AGC Output Voltage is a function of the Input Power Level in dBm The AGC Output Voltage is found on the Alarm connector Pin 14 of J15 2 3 Rate 3 4 Rate 2 3 Rate 3 4 Rate 2 3 Rate 3 4 Rate 2 3 Rate 3 4 Rate 1E 5 5 6 dB 5 2 dB 4 6 dB 5 6 dB 4 2 dB 5 2 dB 1E 9 5 7 ...

Page 225: ...DMD20 20LBST Universal Satellite Modem Technical Specifications MN DMD20 20LBST Revision 14 7 29 Figure 7 16 AGC Voltage Monitor ...

Page 226: ...DMD20 20LBST Universal Satellite Modem Technical Specifications MN DMD20 20LBST Revision 14 7 30 BLANK PAGE ...

Page 227: ...on enhancement This is a factory upgrade only A 4 DC Input Prime Power Allows for an optional DC Input Power Source A 5 ASI RS 422 Parallel ASI Serial BNC Female DVB M2P Parallel RS 422 DB 25 Female A 6 ASI LVDS Parallel ASI Serial BNC Female DVB M2P Parallel LVDS DB 25 Female A 7 HSSI High Speed Serial Interface 50 Pin SCSI 2 Type Connector Complies with Cisco Systems in HSSI Design Specification...

Page 228: ... allows variable Reed Solomon rates Standard Turbo Codec Legacy Turbo Codec and Sequential Codec Outer Code This option must be installed at the factory and may require other options A 13 Combination Low density Parity Check LDPC and TPC Codec A plug in daughter card PLR6002 that can be factory installed at the time of ordering or installed by the user in the field This card supports Standard Turb...

Page 229: ...Modem 1 The following steps allow users to quickly determine from the front panel whether or not the desired feature s are supported by the hardware currently installed in the modem a From the modem s Main Menu scroll right to the SYSTEM Menu b Scroll down c Scroll right to the HW FW CONFIG Menu d Scroll down e Scroll right to the FEATURES Menu f Scroll down g Scroll right to the UPGRADE LIST Menu...

Page 230: ...code is only good on the modem for which it was ordered To enter this code from the front panel perform the following a From the modem s Main Menu scroll right to the SYSTEM Menu b Scroll down c Scroll right to the HW FW CONFIG Menu d Scroll down e Scroll right to the FEATURES Menu f Scroll down The value displayed on the top line of this menu is the 12 digit Unit ID It is displayed on the front p...

Page 231: ...ollowing the instructions outlined in the section on Canceling Demonstration Mode 1 The following steps allow users to quickly determine from the front panel whether or not the desired feature s are supported by the hardware currently installed in the modem a From the modem s Main Menu scroll right to the SYSTEM Menu b Scroll down c Scroll right to the HW FW CONFIG Menu d Scroll down e Scroll righ...

Page 232: ...dem for which it was originally requested To enter this code from the front panel perform the following a From the modem s Main Menu scroll right to the SYSTEM Menu b Scroll down c Scroll right to the HW FW CONFIG Menu d Scroll down e Scroll right to the FEATURES Menu f Scroll down The value displayed on the top line of this menu is the 12 digit Unit ID It is displayed on the front panel of the mo...

Page 233: ... in the upgrade list as follows 1 From the FEATURES Menu 2 Scroll down 3 Scroll right to the UPGRADE LIST Menu 4 Scroll down 5 Scroll right through the available list of options The top line identifies the options and the second line identifies the options status DEMO MODE indicates that the option is has been temporarily activated and is now available for evaluation as part of the modems feature ...

Page 234: ...the SYSTEM Menu 2 Scroll down 3 Scroll right to the HW FW CONFIG Menu 4 Scroll down 5 Scroll right to the FEATURES Menu 6 Scroll down The value displayed on the top line of this menu is the 12 digit Unit ID It is displayed on the front panel of the modem as 3 sets of 4 digits in a dot delineated format indicated in section 4 2 The second line is the data entry area and is displayed as 3 sets of 4 ...

Page 235: ...sabled C 3 Carrier On Modulator output is turned off before reprogramming modulator functions that may alter the output spectrum through the front panel and the user is required to enter Yes to re enable output after the change When using the terminal the modulator is turned off while re programming modulator functions that may alter the output spectrum and the user is required to manually turn on...

Page 236: ...lator does not have signal lock When signal lock returns to the demodulator the modulator turns the carrier back on C 6 Carrier RTS Modulator output is turned off before reprogramming modulator functions that may alter the output spectrum through the front panel and the user is required to enter Yes to re enable output after the change When using the terminal the modulator is turned off while re p...

Page 237: ...e Strap Code Guide Table D 1 for available strap codes Table D 1 Strap Codes Dis Disable Strap Code Decimal Data Rate Kbps Overhead Code Rate Type Framing Type Scrambler Type Drop and Insert Reed Solomon Modulation Mode 1 64 16 15 1 2 VIT IBS IBS Dis Dis QPSK IBS 2 128 16 15 1 2 VIT IBS IBS Dis Dis QPSK IBS 3 256 16 15 1 2 VIT IBS IBS Dis Dis QPSK IBS 5 384 16 15 1 2 VIT IBS IBS Dis Dis QPSK IBS 6...

Page 238: ...84 1 3 4 VIT NONE V 35 IESS Dis Dis QPSK CNT 129 512 1 1 2 VIT NONE V 35 IESS Dis Dis QPSK CNT 130 512 1 3 4 VIT NONE V 35 IESS Dis Dis QPSK CNT 132 768 1 1 2 VIT NONE V 35 IESS Dis Dis QPSK CNT 136 768 1 3 4 VIT NONE V 35 IESS Dis Dis QPSK CNT 144 896 1 1 2 VIT NONE V 35 IESS Dis Dis QPSK CNT 44 896 1 3 4 VIT NONE V 35 IESS Dis Dis QPSK CNT 7 1344 1 1 2 VIT NONE V 35 IESS Dis Dis QPSK CNT 11 1344...

Page 239: ...BS IBS Dis Dis QPSK IBS 133 256 16 15 3 4 VIT IBS IBS Dis Dis QPSK IBS 134 192 16 15 1 2 VIT IBS IBS Dis Dis QPSK CNT 137 192 16 15 3 4 VIT IBS IBS Dis Dis QPSK CNT 138 320 16 15 1 2 VIT IBS IBS Dis Dis QPSK CNT 140 320 16 15 3 4 VIT IBS IBS Dis Dis QPSK CNT 145 384 16 15 3 4 VIT IBS IBS Dis Dis QPSK IBS 100 448 16 15 1 2 VIT IBS IBS Dis Dis QPSK CNT 146 448 16 15 3 4 VIT IBS IBS Dis Dis QPSK CNT ...

Page 240: ... CNT 67 1408 16 15 1 2 VIT IBS IBS Dis Dis QPSK CNT 71 1408 16 15 3 4 VIT IBS IBS Dis Dis QPSK CNT 75 1472 16 15 1 2 VIT IBS IBS Dis Dis QPSK CNT 77 1472 16 15 3 4 VIT IBS IBS Dis Dis QPSK CNT 78 1600 16 15 1 2 VIT IBS IBS Dis Dis QPSK CNT 83 1600 16 15 3 4 VIT IBS IBS Dis Dis QPSK CNT 85 1664 16 15 1 2 VIT IBS IBS Dis Dis QPSK CNT 86 1664 16 15 3 4 VIT IBS IBS Dis Dis QPSK CNT 89 1728 16 15 1 2 V...

Page 241: ...example how to configure the modem for some of the most popular configurations The following information illustrates the allowable combinations for Mode and Data Rate Allowable Combinations Mode Rate Framing IDR 8 448 Mbps 3 4 7 8 Rate FEC 6 312 Mbps 1 2 3 4 7 8 Rate FEC 2 048 Mbps 1 2 3 4 7 8 Rate FEC 1 544 Mbps or Below 1 2 3 4 7 8 Rate FEC IBS 2 048 Mbps or below 1 2 3 4 7 8 Rate Closed Network...

Page 242: ... be entered from this starting point Case 1 IDR 8 448 Mbps 3 4 Rate Viterbi Starting with the Data Rate 512 Kbps Modulator Method 1 Under Interface Menu Set Interface type Set Tx clock selection Set mode to IDR Under Mod Data Menu Set code rate to 3 4 VIT Set data rate for 8448000 Under Mod IF Menu Set desired Tx frequency and power level Turn IF ON Method 2 Under Interface Menu Set Interface type...

Page 243: ...n Set Buffer Size Set Demod strap code to 128 Under Demod IF Menu set desired Rx frequency Case 2 IBS 1 544 Mbps 3 4 Rate Viterbi Starting with the Data Rate 512 Kbps Modulator Method 1 Under Interface Menu Set Interface type Set Tx clock selection Set Framing to 1 15 Set mode to IBS Under Mod Data Menu Set code rate to 3 4 VIT Set data rate for 1544000 Under Mod IF Menu Set desired Tx frequency a...

Page 244: ...nterface Menu Set Interface type Set Buff clock selection Set Buffer Size Set Demod strap code to 120 Under Demod IF Menu Set desired Rx frequency Case 3 Closed Network 3 4 Rate Viterbi IBS Overhead Starting with the Data Rate 512 Kbps Modulator Method 1 Under Interface Menu Set Interface type Set Tx clock selection Set mode to IDR Under Mod Data Menu Set code rate to 3 4 VIT Set Framing for 1 15 ...

Page 245: ...te to 3 4 VIT Set Framing for 1 15 Method 2 Under Interface Menu Set Interface type Set Buff clock selection Set Buffer Size Set Demod strap code to 101 Under Demod IF Menu Set desired Rx frequency Case 4 Loop Timing Example Method 1 Under Interface Menu Under Tx Setup Menu Set INTF to RS 422 Set SCT Source to SCR Set Tx Clock to SCTE Set mode to IBS Method 2 Under Interface Menu Under Tx Setup Me...

Page 246: ...DMD20 20LBST Universal Satellite Modem Strap Codes MN DMD20 20LBST Revision 14 D 10 BLANK PAGE ...

Page 247: ... for the TCP IP Several selections are available and are described below When configuring the modem for Web Browser Boot Mode must be set to NON VOL A brief description of the available selections are a Default If the Ethernet interface is not to be used select this mode No IP Address or mask changes will be allowed while in this mode of operation The following parameters will be set and will not ...

Page 248: ...ngs Refer to your IP Administrator if you do not know this address for the correct address setting Example IP Address Mask setting 255 255 000 000 5 MODEM IP ADDR This will allow for the entry of the Modem s individual network IP Address Each device on the network will have a unique address Refer to the IT administrator for the correct address setting Example Modem IP Address setting 172 018 100 2...

Page 249: ...hernet Rate 10 MBPS HD E 4 Ethernet Test E 4 1 Connecting the Modem Ethernet Cable to a Network Link 1 Connect the Network Switch Hub to the Modem Ethernet port J9 using standard RJ 45 to RJ 45 10BaseT CAT 5 Cables as shown below Ethernet Network Connection E 4 2 Connecting the Modem Ethernet Cable Directly to a Computer without a Network The user can directly connect to the equipment without conn...

Page 250: ...thernet adapter Usually it is the first Local Area Connection listed Double click the Local Area Connection Click on the Properties icon Local Area Connection Status Box 3 Make sure that the box next to the Internet Protocol TCP IP is checked Highlight Interconnect Protocol TCP IP and click on the Properties button Local Area Connection Properties Box 4 Select Use the following IP Address Enter in...

Page 251: ...E 5 complete the PC Configuration Note some computers may require that the computer be restarted for the changes to take effect Internet Protocol TCP IP Properties Box 5 To reconnect the computer to a network select the Obtain an IP address automatically selection in the screen shown above ...

Page 252: ...00 215 with 32 bytes of data Reply from 172 18 100 215 bytes 32 time 109ms TTL 64 Reply from 172 18 100 215 bytes 32 time 1ms TTL 64 Reply from 172 18 100 215 bytes 32 time 2ms TTL 64 Reply from 172 18 100 215 bytes 32 time 123ms TTL 64 Ping statistics for 172 18 100 215 Packets Sent 4 Received 4 Lost 0 0 loss Approximate round trip times in milli seconds Minimum 0ms Maximum 123ms Average 58ms 4 I...

Page 253: ... monitor the parameters and functions of these connected units To find out if the unit has the Web interface use the front panel SYSTEM control screen and make sure that you can see the WEB submenu If you do not see the WEB submenu contact customer service for help See also Radyne Remote Operations part number MN DMDREMOTEOP F 2 Setup F 2 1 TCP IP Menus IMPORTANT Before you use the web interface m...

Page 254: ...hat is accessible To use an alternate IP address change the BOOT MODE to NON VOL You can program NON VOL to any valid IP address F 3 Web Interface Security Access rights and authentication parameters are stored in the web user database Anyone who uses the web interface must have a user account in the web user database A user account contains four parameters User ID Access Group Authentication Pass...

Page 255: ...ited Access Operators monitor and control modem parameters and change their own authentication passwords ADMIN Full Access Administrators monitor and control modem parameters change any user s name and authentication password and modify IP network settings This setting has full access to the entire site NO GROUP No Access These users do not have any access to the web interface F 1 User Account Set...

Page 256: ...tton to delete the characters 5 Use the direction buttons and numeric keys to enter the new User ID 6 Press ENTER to save the change F 1 2 Edit the Access Group 1 Select ACCESS GROUP 2 Press ENTER 3 Press the down button until you see the new Access Group 4 Press ENTER to save the change F 1 3 Edit the Authentication Password 1 Select AUTH PASSWORD 2 Press ENTER 3 Move the cursor to the first char...

Page 257: ...llowing fields will be displayed a ACCESS GROUP This will allow the assignment of No Group ADMIN OPER or GUEST to USER 1 b AUTH PASSWORD This will allow for the entry of the password for USER 1 c USER RESET Using this command will allow the factory defaults as listed in the table above to be restored to USER 1 This can be used in the event that USER 1 is locked out due to password restriction 2 US...

Page 258: ... Equipment Website Once you know that the modem is accessible through the internet do these steps 1 Start the internet browser 2 Type the modem s IP address in the address field and then press Enter The WEB browser equipment introduction page opens Figure F 1 WEB Browser Equipment Introduction Page ...

Page 259: ...he Comtech EF Data website and customer service pages F 4 1 Log in to the Equipment Website You must log in before you can go to other pages in the website The login controls your access to resources and actions in the website If you attempt to go to any other page in the website the Login window requests your login Figure F 2 Login Window See section F 3 1 for the factory default user name and pa...

Page 260: ...urrent front panel alarm status of the modem This display is updated immediately any time the status changes Figure F 3 Monitor and Control Web Page The navigation tabs correspond to the front panel top level menus Move the cursor over a navigation tab to see the related sub menu The sub menus correspond to the front panel sub menus Below the navigation tabs the main menu section shows the current...

Page 261: ...ty View is active the color of the button is blue If Compatibility View is active the Monitor Control window should be displayed correctly F 6 2 Configure Firefox for the Radyne WEB Interface On the Monitor Control Password Setup or IP Administration windows some fields may be blank or contain Update To correct the display either 1 change the encoding or 2 install the Internet Explorer Tab V2 add ...

Page 262: ...te Modem Web Browser Setup Guide MN DMD20 20LBST Revision 14 F 10 F 6 2 1 Change the encoding Click View on the Firefox menu bar Select Character Encoding and click Western ISO 8859 1 The page refreshes and shows the correct values ...

Page 263: ...ode The link to the add on is https addons mozilla org en US firefox addon ie tab 2 ff 36 Download and install IE Tab V2 After IE Tab V2 is installed Firefox restarts Go to Tools IE Tab 2 Options and add the Radyne product IP address to the Sites Filter After the IP address is added to the Sites Filter the WEB browser pages show correct values In this example Address 192 168 1 102 was added earlie...

Page 264: ...ot available Click the Chrome address bar Make sure the full address is highlighted and then press Enter The Monitor Control window opens On the Monitor Control Password Setup or IP Administration windows some fields may be blank or contain Update To correct the display either 1 change the encoding or 2 install the Internet Explorer Tab V2 add on NOTE If you leave a window and return it may be nec...

Page 265: ...etup Guide MN DMD20 20LBST Revision 14 F 13 F 6 3 1 Change the encoding On the Chrome address bar click the wrench icon Customize and Control Google Chrome Go to Tools Encoding and click Western ISO 8859 1 The page refreshes and shows the correct values ...

Page 266: ...lets you open WEB browser pages in Internet Explorer 7 mode The link to install IE Tab is https chrome google com webstore search IE 20Tab utm_source chrome ntp icon To install IE Tab click ADD TO CHROME next to IE Tab After IE Tab is installed the IE Tab icon shows in the address bar To use IE Tab click the icon After IE Tab is started the WEB browser pages show correct values ...

Page 267: ...e F 6 4 1 Empty the browser cache On the Safari menu bar click Edit and then click Empty Cache Click Empty on the confirmation popup window After the browser cache is empty open the Monitor Control page CAUTION If you do not empty the browser cache before you open the Monitor Control page communication can be lost If communication is lost you must reset the Ethernet M C port on the Radyne product ...

Page 268: ...nter the Modem IP Address Re entering the Modem IP Address avoids traffic disruption F 6 4 3 Re enter the Modem IP address 1 Go to SYSTEM TCP IP MODEM IP ADDR 2 Press ENTER 3 Type the new IP Address and press ENTER 4 Press ENTER again 5 Retype the new IP Address and press ENTER IMPORTANT You must change the IP Address If you just press ENTER repeatedly without changing the IP Address the Ethernet ...

Page 269: ...MD20 20LBST Revision 14 F 17 On the Monitor Control Password Setup or IP Administration windows some fields may be blank or contain Update To correct the display change the encoding NOTE If you leave a window and return it may be necessary to correct the display again ...

Page 270: ...wser Setup Guide MN DMD20 20LBST Revision 14 F 18 F 6 4 4 Change the encoding Click View on the Safari menu bar Select Text Encoding and click Western European The Default selection is not applicable The page refreshes and shows the correct values ...

Page 271: ... Maxthon for the Radyne WEB Browser On the Monitor Control Password Setup or IP Administration windows some fields may be blank or contain Update To correct the display either 1 change the browser mode or 2 change the encoding NOTE If you leave a window and return it may be necessary to correct the display again ...

Page 272: ... Guide MN DMD20 20LBST Revision 14 F 20 F 6 5 1 Change the browser mode Two browser modes are possible Ultra Mode default Retro Mode Click the browser mode icon at the right of the address bar Select Retro Mode The page refreshes and shows the correct values ...

Page 273: ...up Guide MN DMD20 20LBST Revision 14 F 21 F 6 5 2 Change the encoding On the Monitor Control page right click to open the browser menu Select Encoding and then click the encoding type that is already selected The page refreshes and shows the correct values ...

Page 274: ...DMD20 20LBST Universal Satellite Modem Web Browser Setup Guide MN DMD20 20LBST Revision 14 F 22 BLANK PAGE ...

Page 275: ...ator be set to the appropriate framing for AUPC options to be editable and for the AUPC function to operate properly Examples of the basic Radyne AUPC Operations are described as follows Assume that the two modems one at each end of the link are set to Radyne AUPC operation Only one direction is discussed but the same functions could be occurring in both directions simultaneously Local Modem is tr...

Page 276: ...Eb No it slowly begins to raise its output power and will continue to do so until the Target Eb No is restored at the local site When the rain diminishes the local modem s Eb No will begin to increase The remote modem will now lower its power level to restore the target value The operation is therefore a feedback control loop with the added complication of a significant time delay G 1 3 Near Side ...

Page 277: ...will use in the event of a carrier loss at the local side REMOTE CL ACTION HOLD MAXIMUM NOMINAL This setting allows users to determine what local output power setting to use in the event that the remote end has a carrier loss 1 The AUPC Menus are located under the Modulator Menu as shown in Section 4 2 The EF AUPC Menu displays when EFAUPC Framing is enabled in the Demod and Mod set up menus 3 Hig...

Page 278: ...DMD20 20LBST Universal Satellite Modem AUPC Operation MN DMD20 20LBST Revision 14 G 4 BLANK PAGE ...

Page 279: ...nterface allows one or more modems to be looped together using the same T1 or E1 trunk The Transmit Data Trunk is brought into the modem via the Send Data In SDI Port From there the TX Baseband Processor extracts the selected timeslots from the G 704 Frame and prepares them for transmission The original trunk data is sent out of the modem unaltered via the Send Data Out SDO Port The Receive Data T...

Page 280: ...DMD20 20LBST Universal Satellite Modem Drop and Insert D I MN DMD20 20LBST Revision 14 H 2 Figure H 1 Looped Modems Figure H 2 Looped Modems with Separate D I Trunks ...

Page 281: ...d be input via the Insert Data In Port The Terrestrial Data is buffered inside the Modem The RX Baseband Processor inserts satellite data into the selected timeslots in the G 704 Frame and the modified terrestrial data is then output via the Receive Data Out Port refer to Figure H 4 If framed terrestrial data is not available selection of the Internal T1 E1 frame source will cause the modem to gen...

Page 282: ...l CRC checksum and the Insert function calculates the required CRC checksum The user may independently program n timeslots to drop and n timeslots to insert where n 1 2 3 4 5 6 8 10 12 15 16 20 24 or 30 In addition to the selected Drop timeslots the Transmit Function also extracts the appropriate ABCD signaling bits from terrestrial timeslot 16 for transmission in IBS Frame as required Conversely ...

Page 283: ...ial multiframe The user may independently program n timeslots to drop and n timeslots to insert where n 1 2 3 4 5 6 8 10 12 15 16 20 24 or 30 Robbed Bit Signaling RBS is handled without any need for operator intervention and is transparent to the user H 1 4 Multidestinational Systems Because the Drop and Insert Functions are completely independent so multi destinational communications are easily s...

Page 284: ...te of 256 the modem will allow 4 channels to assign timeslots Under the Tx Menu assign the timeslots that are to be used to the 4 channels CH1 is assigned to TS1 Timeslot 1 CH2 to TS 2 CH3 to TS3 and CH4 to TS4 ENTER must be depressed after assigning each individual TS Once the timeslots are assigned to the channels use the Left or Right Arrow Key to scroll to the Mapping Menu This menu will appea...

Page 285: ...he display to read Map Copy RX EDIT RX ACTIVE 4 Press ENTER to enter the settings into the modem To View the current Timeslot Assignment 1 If there is a question of the channels not being entered properly the Mapping Menu may be used to see how the channels timeslots are configured in the modem 2 Use ENTER and the Arrow Keys to make the mapping menu read for the Tx Side Map Copy TX ACTIVE TX EDIT ...

Page 286: ...e allowed Trying to select a T1 type Insert Mode such as T1 D4 with the demod data rate set to 1920000 bps will result in the error message INVALID INSERT MODE and the selection will not be allowed Once D I Mode has been selected trying to change the data rate to something other than another valid D I data rate will result in the error message RATE OUT OF BOUNDS and the change will not be allowed ...

Page 287: ...tion of PCM 31 or PCM 31C type terrestrial framing limits the terrestrial timeslots to values from 1 31 Therefore the terrestrial framing format should be identified via the Drop Mode and Insert Mode entries prior to editing the Drop or Insert satellite channel to terrestrial timeslot maps H 2 3 1 Insert Terrestrial Frame Source The Insert Terrestrial Frame Source selection tells the Modem from wh...

Page 288: ... Modulator Under Mod Data Set Data Rate 512000 Set Conv Enc 3 4 Rate VIT Under Modulator Set Network Spec Drop Insert Under Interface Under TX Setup Set Tx Type according to your hardware configuration example G703BT1B8ZS Set Tx Clock SCTE Under Tx D I Set Drop Mode T1 D4 Use SATCh TS edit capability to define desired mapping of Satellite Channels to drop Terrestrial Slots Use Map Copy to copy Tx ...

Page 289: ...rbi Under Interface Under RX Setup Set Rx Type according to your hardware configuration Set Buff Size to desired depth Under Rx D I Set Insert Mode T1 D4 Set T1 E1 Frm Src External Use SATCh TS edit capability to define proper mapping of Satellite Channels to insert Terrestrial Slots For Satellite Channels that are not to be inserted enter NI No Insert for the Terrestrial Slot Use Map Copy to copy...

Page 290: ...DMD20 20LBST Universal Satellite Modem Drop and Insert D I MN DMD20 20LBST Revision 14 H 12 Figure H 8 Single Truck Figure H 9 Rx Only With Trunk Figure H 10 Rx Only No Trunk ...

Page 291: ...ithin the modem and remain unchanged after a power down Table H 1 D I Multiplexer Map Locations Used Data Rate Kbps Map Locations Used n 1 2 4 8 16 24 30 64 1 128 1 2 256 1 4 384 1 6 512 1 8 768 1 12 1024 1 16 1536 1 24 1920 1 30 It is important to understand that each map contains up to 30 usable entries In many cases a smaller number of entries will be relevant except when the data rate is 1920 ...

Page 292: ...it Maps are the buffer areas that are used when creating or modifying a map through the modem s LCD when editing is complete the appropriate map should be copied to the Active Map Any map may be copied to any other map with the exception of the ROM maps These maps may only be the source of the data used to create a User Edit or Active Map Maps can be created in the map editor and stored as User Ma...

Page 293: ...n the Active map s and would ignore the other 22 entries To insert data received from a demodulator into channels 17 through 24 of an E1 frame the first eight entries of the Active Receive map should contain 17 18 19 20 21 22 23 and 24 ROM Map 6 could be used as the template for an Active Transmit Drop and or Active Receive Insert Map with a modulator and or demodulator configured for 768 Kbps ope...

Page 294: ...DMD20 20LBST Universal Satellite Modem Drop and Insert D I MN DMD20 20LBST Revision 14 H 16 BLANK PAGE ...

Page 295: ...tact Comtech to order the appropriate hardware and or feature set upgrade If the modem has the appropriate hardware but the software revision is prior to AY you will need to download the latest modem firmware from the Radyne FTP website The following menus show how to find out if the modem has the required prerequistes SYSTEM HW FW CONFIG FIRMWARE F05058 AY 6 1 or later required SYSTEM HW FW CONFI...

Page 296: ...nsert DATA DATA RATE bps N x 64000 The data rate can be set to any N x 64 kbps rate based on the desired number of drop or insert slots The following values of N are allowed based on the terrestrial interface and terrestrial framing types shown T1 Any framing Any N from 1 to 24 E1 Any PCM31 Any N from 1 to 31 E1 Any PCM30 Any N from 1 to 30 as TS 16 is automatically transmitted SCRAMBLER CTRL DISA...

Page 297: ...e at the same time providing all of the functionality found in the Drop Insert open network standard plus Automatic Uplink Power Control By comparison the Drop Insert open network standard requires 4267 bps per slot so by utilizing Efficient Drop and Insert Radyne customers can realize a bandwidth savings of over 4000 bps per slot I 3 3 Calculating the Efficient D I Rate with E1 Signaling When E1 ...

Page 298: ...verhead For 5 Drop Slots the Data Rate would be 5 64000 or 320000 bps The Efficient D I Rate would be 320000 5 250 bps 321250 bps The Drop Insert Open Network rate is over 20 000 bps higher at 341333 bps Example 1b Change to E1 PCM30 framing E1 Signaling standard ES to ES overhead Add 5 2000 bps to our previous calculation gives 331250 bps Still saving over 10 000 bps compared to the open network ...

Page 299: ...gher at 682667 bps Example 2b Change to E1 PCM30 framing E1 Signaling standard ES to ES overhead Add 10 2000 bps to our previous calculation gives 662500 bps Still saving over 20 000 bps compared to the Drop Insert open network standard Example 2c Change to Enhanced Async with In Band Baud Rate of 1200 X Truncation of 1200 10 125 X Truncation of 0 96 X 0 The rate stays at the previous value of 662...

Page 300: ...DMD20 20LBST Universal Satellite Modem Efficient Drop Insert MN DMD20 20LBST Revision 14 I 6 BLANK PAGE ...

Page 301: ...ormal Under the Interface Menu Under the Rx Setup Menu Set the Terrestrial Interface to Ethernet Set the Buffer Size to Zero Set the Buffer Clock to Rx Sat Set the Buffer Clock Polarity to Normal When Ethernet Data Interface is selected the Tx Clock Source will default to SCTE and the Clock Polarity will default to Normal In addition the Buffer Clock will default to RxSat and the Buffer Clock Pola...

Page 302: ...hernet Data Interface operates normally Data received on Port 4 that is not addressed to other equipment on the LAN side is transmitted over the satellite When Port 4 is selected for Daisy Chain any data received on Port 4 JS4 is forwarded to of the other LAN side ports Ports 1 3 and is not transmitted over the satellite This is extremely useful in a point to multipoint configuration as illustrate...

Page 303: ...y Care must be taken when selecting Strict Priority as it is entirely possible for the lower priority queues to be stalled indefinitely J 1 5 Set up the Ethernet Bridge to operate like a FIFO In certain circumstances it may be desirable to have the Ethernet interface operate in a FIFO like manner with no reordering of packets This can be established by using a single port on the Ethernet interface...

Page 304: ...us The following status is available under the Monitor Menu Link Status Sub Menu when the Ethernet Data Interface is selected Port 1 Status Displays the current status of LAN Port 1 Port 2 Status Displays the current status of LAN Port 2 Port 3 Status Displays the current status of LAN Port 3 WAN Status Displays the current status of the WAN Port For each of the above listed ports the status may t...

Page 305: ... 214 x 10 4 1 kilometer 1 x 106 1 x 105 3 938 x 104 3 281 1093 1000 1 0 6214 1 mile 1 609 x 106 1 609 x 105 6 336 x 104 5280 1760 1609 1 609 1 Temperature Conversions Units of Weight Unit Gram Ounce Avoirdupois Ounce Troy Pound Avoirdupois Pound Troy Kilogram 1 gram 1 0 03527 0 03215 0 002205 0 002679 0 001 1 oz avoir 28 35 1 0 9115 0 0625 0 07595 0 02835 1 oz troy 31 10 1 097 1 0 06857 0 08333 0 ...

Page 306: ...2114 WEST 7TH STREET TEMPE ARIZONA 85281 USA 480 333 2200 PHONE 480 333 2161 FAX ...

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