Premier Mounts CDM-600 User Manual

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600

Open Network Satellite Modem (2.4 kbps – 20 Mbps

Installation and Operation Manual

For Firmware Version 2.0.1 or hi

see New in this Release– Section 1.5

IMPORTANT NOTE: The information contained in this document supercedes all previously published information regarding this product. Product specifications are subject to change without prior notice.

Part Number MN/CDM600.IOM Revision 7

Page 2

Page 3

Errata A

Comtech EF Data Documentation Update

Subject:

Date: Document:

Part Number: Collating Instructions:

Comments:

The following changes affects the values shown on page 6-9 and 16-13.

Change AUPC Parameters in Remote Control

November 23, 2005 CDM-600 Open Network Satellite Modem (2.4 kbps – 20 Mbps) Installation and Operation Manual Revision 7, dated February 9, 2005 MN/CDM600.EA7 Attach this page to page 16-13

Change Specifics:

Change to AUPC Target Eb/No Parameter

Since Revision 7 of the CDM-600 Manual was published, the range of the value of target Eb/No has been increased. Effective in firmware version 2.1.1 and subsequent:

• Previously the maximum value was 9.9 dB

• New maximum value is 14.9 dB.

This affects the front panel and the remote control, refer to the remote control command table for more detail.

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AUPC Parameters

APP=

6 bytes Command or Query.

Defines AUPC operating parameters. Has the form abc.cd, where:

a=Defines action on max. power condition. (0=do nothing, 1=generate Tx alarm) b=Defines action on remote demod unlock. (0=go to nominal power, 1=go to max power)

c.c=target Eb/No value, for remote demod, from 0.0 to

14.9 dB, where numbers above 9.9 use hex representation for the 1 st character, ie 14.9 is coded as E.9.

d =Max increase in Tx Power permitted, from

0.0 to 9.0 dB

Example: APP=015.67 (Sets no alarm, max power, 5.6 dB target Eb/No and 7 dB max power increase.

APP= APP? APP* APP#

APP? APP=abc.cd

(see description of arguments)

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Errata B

Comtech EF Data Documentation Update

Subject:

Date: Document:

Part Number: Collating Instructions:

Comments:

The following changes affects the values shown on page 15-9.

Revised Miscellaneous Table

April 18, 2006 CDM-600 Open Network Satellite Modem (2.4 kbps – 20 Mbps) Installation and Operation Manual Revision 7, dated February 9, 2005 MN/CDM600.EB7 Attach this page to page 15-9

Change Specifics:

15.2 Miscellaneous

Front panel Tactile keypad, 6 keys (Up/Down, Left/Right, Enter/Clear)

Loopbacks Internal IF loopback, RF loopback, digital loopback, and inward/outward loopback

Fault relays Hardware fault, Rx and Tx Traffic Alarms, Open Network Backward Alarms

M&C Interface EIA-232 and EIA-485 (addressable multidrop, 2-wire or 4-wire)

M&C Software SATMAC or CMCS software for control of local and distant units

Dimensions 1U high, 12 inches (305 mm) deep

Weight 10 lbs (4.5 kgs) max

AC consumption 25 watts (typical) 55 watts (maximum)

Operating voltage 100 - 240 volts AC, +6%/-10% - autosensing

Operating temperature 0 to 50oC (32 to 122oF)

Vacuum Fluorescent Display (blue) - 2 lines of 40 characters

Type: Form C Contacts. Rating: Less than ± 15 volts up to 1 Amp

(total absolute max. range is 90 - 254 volts AC)

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Errata C

Comtech EF Data Documentation Update

Subject:

Date: Document:

Part Number: Collating Instructions:

Comments:

The following changes affects odd numbers pages.

Chapter Title

July 12, 2006 CDM-600 Open Network Satellite Modem (2.4 kbps – 20 Mbps) Installation and Operation Manual Revision 7, dated February 9, 2005 MN/CDM600.EC7 Attach this page to page 15-3

Change Specifics:

CDM-600 Satellite Modem Revision 7 Summary of Specifications MN/CDM600.IOM

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Errata D

Comtech EF Data Documentation Update

Subject:

Date: Document:

Part Number: Collating Instructions:

Comments:

Highlighted Input Power Range changes are as follows:

Change Specifics:

Changed Input Power Range

July 18, 2006 CDM-570/570L Satellite Modem with Optional IP Module, Installation and Operation Manual, Rev. 4, dated April 12, 2006 MN/CDM-570L.ED4 Attach this page to page 12-3

12.2 Demodulator

Data rate range, operating modes, de-scrambling, input impedance/return loss etc., as per Modulator

Input power range

CDM-570L Desired Carrier: -130 + 10 log(Symbol Rate) to -90 + 10 log(Symbol Rate).

CDM-570 Desired Carrier: -30 to -60 dBm.

+35 dBc maximum composite, up to -5 dBm, absolute max.

+40 dBc maximum composite, up to –10 dBm, absolute max.

Filename: T_ERRATA 1

Page 8

Filename: T_ERRATA 2

Page 9

Errata E

Comtech EF Data Documentation Update

Subject:

Date: Document:

Part Number: Collating Instructions:

Comments:

Chnaged slope of curves for TPC 7/8 for Figure 7-5. The following table highlights the changes to the BER curve.

Changed Figure 7-5, TPC Curve for Rate 7/8

July 27, 2006 CDM-570/570L Satellite Modem with Optional IP Module, Installation and Operation Manual, Rev. 4, dated April 12, 2006 MN/CDM-570L.EE4 Attach this page to page 7-14

Change Specifics:

TURBO PRODUCT CODEC Rate 7/8 QPSK Rate 7/8 8-PSK Rate 7/8 16-QAM BER (With two adjacent carriers, each 7 dB higher than the desired carrier)

For:

BER=10

BER=10-8

Rate 7/8 (Q, OQ)

Guaranteed Eb/No:

(typical value in

parentheses)

-5

4.3 dB (4.0 dB)

4.5 dB (4.2 dB)

Rate 7/8 (8-PSK)

Guaranteed Eb/No:

(typical value in

parentheses)

7.0 dB (6.6 dB)

7.2 dB (6.8 dB)

Rate 7/8 (16-QAM)

Guaranteed Eb/No:

(typical value in

parentheses)

8.1 dB (7.7 dB)

8.3 dB (7.9 dB)

Filename: T_ERRATA 1

Page 10

Eb/No in dB

1 2 3 4 5 6 7 8 9 10 11 12

1E-1

Comtech Turbo Product Codec

1E-2

1E-3

1E-4

1E-5

1E-6

Uncoded

BPSK/QPSK

Spec limit

Rate 7/8

QPSK/OQPSK

Rate 7/8 QPSK/OQPSK,

8-PSK and 16-QAM

Uncoded

16-QAM

Spec limit

Rate 7/8

8-PSK

Uncoded

8-PSK

1E-7

Spec limit

Rate 7/8 16-QAM

1E-8

Typical performance

1E-9

1 2 3 4 5 6 7 8 9 10 11 12

BER

Figure 7-5. Comtech EF Data Turbo Product Codec

Rate 7/8 QPSK/OQPSK, 8-PSK AND 16-QAM

Filename: T_ERRATA 2

Page 11

Comtech EF Data Documentation Update

Subject:

Date: Document:

Part Number: Collating Instructions:

Comments:

15.9 AGC Voltage

Note: This is for reference only.

Added Chart for AGC Voltage

November 2, 2006 CDM-600 Open Network Satellite Modem (2.4 kbps – 20 Mbps) Installation and Operation Manual Revision 7, dated February 9, 2005 MN/CDM600.EF7 Attach this page to page 15-10

Errata F

CDM-600 AGC Voltage

2.5

1.5

AGC Level (volts)

0.5

-70-60-50-40-30-20

Input L evel (dBm)

at 100 ksps

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Errata G

Comtech EF Data Documentation Update

Subject:

Date: Document:

Part Number: Collating Instructions:

Comments:

The revised index is presented on the following pages.

Revised Remote Command Index

June 14, 2007 CDM-600 Open Network Satellite Modem (2.4 kbps – 20 Mbps) Installation and Operation Manual Revision 7, dated February 9, 2005 MN/CDM600.EG7 Attach this page to page 16-6

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Address, 16–9, 16–10, 16–18,

16–25 ADJ?, 16–27 ADJ=, 16–27 Alarm, 16–14, 16–18, 16–20,

16–22, 16–23, 16–28, 16–39 APP?, 16–12 APP=, 16–12 AUP?, 16–12 AUP=, 16–12 AUPC, 16–11, 16–12, 16–13,

16–18, 16–20, 16–39

Basic Protocol, 16–8 BFS?, 16–35

CAE=, 16–34 CAS=, 16–33 CID?, 16–29 CID=, 16–29 CLD=, 16–31 CST=, 16–31 CTD?, 16–28 CTD=, 16–28

D&I++, 16–8, 16–14, 16–16,

16–20, 16–23 DAY?, 16–31 DAY=, 16–31 DNI?, 16–40 DNI?n, 16–40 DNI=, 16–40 DTS?, 16–41 DTS=, 16–41 DTY?, 16–14 DTY=, 16–14

EBA?, 16–22 EBA=, 16–22 EBN?, 16–35 EFM?, 16–25 EFM=, 16–25

EFR?, 16–27 EFR=, 16–27 EIA-232, 16–7, 16–8, 16–10 EIA-485, 16–7, 16–8, 16–9,

16–10 EID?, 16–38 End Of Packet, 16–13 ESA?, 16–25 ESA=, 16–25 ESC?, 16–25 ESC=, 16–25 External Clock, 16–13

FCS?, 16–37 FLT?, 16–34, 16–39 FSW=, 16–43

IEP=, 16–35 Instruction Code, 16–10, 16–

11, 16–18, 16–20, 16–22 Instruction Code Qualifier, 16–

11 IRD?, 16–22 IRD=, 16–22 ISP=, 16–33 ITD?, 16–13 ITD=, 16–13 ITS?, 16–41 ITS=, 16–41 ITY?, 16–23 ITY=, 16–23

Loop-Timed, 16–13 LRS?, 16–36 LRS=, 16–36

Message Arguments, 16–12 MGC?, 16–30 MGC?n, 16–30 MGC=, 16–30 MSK?, 16–28 MSK=, 16–28

NUE?, 16–33 NUS?, 16–32

ODU?, 16–29 ODU=, 16–29

Packet Structure, 16–9 PLI?, 16–13

RBA?, 16–24 RBA=, 16–24 RBS?, 16–23 RBS=, 16–23 RCB=, 16–31 RCK?, 16–22 RCK=, 16–22 RCR?, 16–18 RCR=, 16–18 RDR?, 16–19 RDR=, 16–19 RDS?, 16–21 RDS=, 16–21 REB?, 16–13 RED?, 16–36 REF?, 16–20 REF=, 16–20 RET?, 16–24 RET=, 16–24 RFM?, 16–16 RFM=, 16–16 RFO?, 16–35 RFQ?, 16–15 RFQ=, 16–15 RFT?, 16–17 RFT=, 16–17 RIP?, 16–24 RIP=, 16–24 RIT?, 16–16 RIT=, 16–16 RMD?, 16–17 RMD=, 16–17 RNE?, 16–34, 16–35 RNS?, 16–33 RRS?, 16–20

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RRS=, 16–20 RSI?, 16–20 RSI=, 16–20 RSL?, 16–35 RSW?, 16–22 RSW=, 16–10, 16–22 RTC, 16–24, 16–30, 16–31,

16–32 RTC=, 16–24 RTE?, 16–23 RTE=, 16–23 RVL?, 16–23 RVL=, 16–23

SCP?, 16–26 SCP=, 16–26 Sequential, 16–17 SNO?, 16–36 SNO=, 16–36 SSI?, 16–32 SSI=, 16–32 Start Of Packet, 16–10 SWR?, 16–36

TMD?, 16–9 TMD=, 16–9 TMP?, 16–37 TPL?, 16–11 TPL=, 16–11 TRS?, 16–11 TRS=, 16–11 TSC?, 16–11 TSC=, 16–11 TSI?, 16–11 TSI=, 16–11 TST?, 16–28 TST=, 16–28 TTA?, 16–14 TTA=, 16–14 TTC?, 16–14 TTC=, 16–14 TVL?, 16–13 TVL=, 16–13 TXO?, 16–12 TXO=, 16–12

Viterbi, 16–17

TBA?, 16–14 TBA=, 16–14 TCK?, 16–13 TCK=, 16–13 TCR?, 16–10 TCR=, 16–9, 16–10 TDR?, 16–10 TDR=, 16–10 TET?, 16–15 TET=, 16–15 TFM?, 16–8 TFM=, 16–8 TFQ?, 16–11, 16–12, 16–9 TFQ=, 16–9, 16–11, 16–12,

16–9 TFT?, 16–9 TFT=, 16–9 TIM?, 16–32 TIM=, 16–32 TIP?, 16–15 TIP=, 16–15 TIT?, 16–9 TIT=, 16–9

WRM?, 16–27 WRM=, 16–27

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CDM-600

Open Network Satellite Modem (2.4 kbps – 20 Mbps)

Comtech EF Data is an ISO 9001

Registered Company.

Installation and Operation Manual

For Firmware Version 2.0.1 or higher

(see New in this Release – Section 1.5)

Part Number MN/CDM600.IOM

Revision 7

February 9, 2005

Comtech EF Data, 2114 West 7th Street, Tempe, Arizona 85281 USA, 480.333.2200, FAX: 480.333.2161

Page 18

CDM-600 Satellite Modem Revision 7 Preface MN/CDM600.IOM

Page 19

Table of Contents

PREFACE................................................................................................................................... XI

Customer Service .......................................................................................................................................xi

About this Manual ....................................................................................................................................xii

Conventions and References ....................................................................................................................xii

Electrical Safety .......................................................................................................................................xiii

Telecommunications Terminal Equipment Directive...........................................................................xiv

EMC (Electromagnetic Compatibility)................................................................................................... xv

Warranty Policy ....................................................................................................................................... xvi

CHAPTER 1.

1.1 Standard Features....................................................................................................................... 1–2

1.1.1 AUPC.................................................................................................................................... 1–2

1.1.2 Software – Flash Upgrading .................................................................................................1–3

1.1.3 Verification ........................................................................................................................... 1–3

1.1.4 Data Interfaces ...................................................................................................................... 1–3

1.2 Major Assemblies........................................................................................................................ 1–4

1.3 FAST Options and Hardware Options .....................................................................................1–4

1.3.1 FAST Accessible Options..................................................................................................... 1–6

1.3.2 FAST System Theory............................................................................................................ 1–6

1.3.3 Implementation ..................................................................................................................... 1–6

1.3.4 Hardware Options .................................................................................................................1–7

1.3.5 Supporting Hardware and Software...................................................................................... 1–8

1.4 Compatibility...............................................................................................................................1–8

1.5 New in this Release...................................................................................................................... 1–9

CHAPTER 2. INSTALLATION ..............................................................................................2–1

INTRODUCTION .............................................................................................1–1

2.1 Unpacking.................................................................................................................................... 2–1

2.2 Mounting...................................................................................................................................... 2–2

2.3 Configuration ..............................................................................................................................2–4

2.4 Select Internal IF Loop............................................................................................................... 2–4

iii

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CDM-600 Satellite Modem Revision 7 Preface MN/CDM600.IOM

2.5 Connect External Cables ............................................................................................................ 2–4

CHAPTER 3. FUNCTIONAL DESCRIPTION........................................................................3–1

CHAPTER 4. PHYSICAL DESCRIPTION ............................................................................. 4–1

4.1 Introduction.................................................................................................................................4–1

4.2 Front Panel ..................................................................................................................................4–1

4.3 Rear Panel.................................................................................................................................... 4–2

4.3.1 IEC Line Input Connector..................................................................................................... 4–2

4.3.2 Rx and Tx IF Connectors (J1 and J2) ...................................................................................4–3

4.3.3 Overhead Data Connector (P3A) ..........................................................................................4–3

4.3.4 Data Interface Connector (P3B)............................................................................................ 4–3

4.3.5 External Reference Connector (J9) ....................................................................................... 4–3

4.3.6 Audio Connector (P4A) ........................................................................................................ 4–3

4.3.7 Remote Control connector (P4B).......................................................................................... 4–4

4.3.8 IDR Alarm connector (P5A) ................................................................................................. 4–4

4.3.9 Form C Traffic Alarm Connector (P5B)..............................................................................4–4

4.3.10 Auxiliary Serial Connector (P6) ...........................................................................................4–4

4.3.11 Balanced G.703 Interface Connector (P7) ............................................................................ 4–4

4.3.12 IDI, DDO Connectors (J10A and J11A) ............................................................................... 4–5

4.3.13 Unbalanced G.703 Tx/Rx (J10B and J11B)......................................................................... 4–5

4.3.14 External Frequency Reference Connector (J12) This is an SMA female connector. It is an

optional connector used to permit the connection of a high-stability external reference signal.......... 4–5

4.4 Dimensional Envelope ................................................................................................................ 4–6

CHAPTER 5. CONNECTOR PINOUTS................................................................................5–1

5.1 Connector Overview ...................................................................................................................5–1

5.2 BNC Connectors.......................................................................................................................... 5–2

5.3 Overhead Interface Connector (P3A) .......................................................................................5–2

5.4 Data Interface Connector (P3B) ................................................................................................5–3

5.5 Audio Interface Connector (P4A).............................................................................................. 5–4

5.6 Remote Control Interface Connector (P4B) ............................................................................. 5–4

5.7 IDR Backward Alarms Connector (P5A) ................................................................................. 5–5

5.8 Unit Alarms (P5B)....................................................................................................................... 5–5

5.9 Auxiliary Serial Connector (P6) ................................................................................................5–6

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CDM-600 Satellite Modem Revision 7 Preface MN/CDM600.IOM

5.10 Balanced G.703 Interface Connector (P7) ................................................................................5–6

5.11 AC Power Connector.................................................................................................................. 5–7

5.12 Ground Connector ...................................................................................................................... 5–7

CHAPTER 6. FRONT PANEL OPERATION.........................................................................6–1

6.1 Description...................................................................................................................................6–1

6.2 Opening Screen ...........................................................................................................................6–5

6.3 Main Menu ..................................................................................................................................6–5

6.3.1 CONFIG................................................................................................................................ 6–6

6.3.1.1 CONFIG: ALL.................................................................................................................. 6–7

6.3.1.2 CONFIG: MODE..............................................................................................................6–7

6.3.1.3 CONFIG: TX .................................................................................................................... 6–8

6.3.1.4 CONFIG: RX.................................................................................................................. 6–14

6.3.1.5 CONFIG: CLOCKS........................................................................................................6–19

6.3.1.6 CONFIG: DROP & INSERT.......................................................................................... 6–22

6.3.1.7 CONFIG: EDMAC .........................................................................................................6–23

6.3.1.8 CONFIG: MISC.............................................................................................................. 6–23

6.3.1.9 CONFIG: REMOTE CONTROL ................................................................................... 6–26

6.3.1.10 CONFIG: MASK ........................................................................................................ 6–27

6.3.1.11 CONFIG: IMPEDANCE ............................................................................................6–29

6.3.1.12 CONFIG: STATISTICS .............................................................................................6–29

6.3.2 TEST ................................................................................................................................... 6–30

6.3.3 INFORMATION................................................................................................................. 6–32

6.3.4 MONITOR.......................................................................................................................... 6–36

6.3.4.1 MONITOR: STORED EVENTS.................................................................................... 6–37

6.3.4.2 MONITOR: STATISTICS.............................................................................................. 6–38

6.3.4.3 MONITOR: RX PARAMETERS................................................................................... 6–39

6.3.4.4 MONITOR: AUPC-PARAMS .......................................................................................6–39

6.3.5 STORE/LOAD.................................................................................................................... 6–39

6.3.5.1 STORE/LOAD: OVERRIDE CONFIGURATION........................................................ 6–40

6.3.6 UTILITIES.......................................................................................................................... 6–40

6.3.6.1 UTILITIES: SET-RTC ...................................................................................................6–40

6.3.6.2 UTILITIES: BRIGHTNESS........................................................................................... 6–40

6.3.6.3 UTILITIES: LAMP.........................................................................................................6–41

6.3.6.4 UTILITIES: 1:1 MANUAL SWITCH............................................................................ 6–41

6.3.6.5 UTILITIES: CIRCUIT ID ..............................................................................................6–41

6.3.7 ODU.................................................................................................................................... 6–42

6.3.8 FAST................................................................................................................................... 6–42

6.3.8.1 FAST: SET......................................................................................................................6–42

6.3.8.2 FAST: VIEW .................................................................................................................. 6–42

CHAPTER 7. FORWARD ERROR CORRECTION OPTIONS............................................. 7–1

7.1 Introduction.................................................................................................................................7–1

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CDM-600 Satellite Modem Revision 7 Preface MN/CDM600.IOM

7.2 Viterbi ..........................................................................................................................................7–1

7.3 Sequential..................................................................................................................................... 7–2

7.4 Reed-Solomon Outer Codec....................................................................................................... 7–3

7.5 Trellis Coding (FAST Option) ................................................................................................... 7–5

7.6 Turbo Product Codec (Hardware Option) ............................................................................... 7–6

7.7 TPC and Low Density Parity Check (LDPC) coding ..............................................................7–6

7.7.1 Introduction...........................................................................................................................7–6

7.7.2 LDPC versus TPC.................................................................................................................7–7

7.7.3 End-to-End Processing Delay ...............................................................................................7–9

7.8 Uncoded Operation (No FEC) .................................................................................................7–11

CHAPTER 8. OFFSET QPSK OPERATION ......................................................................... 8–1

CHAPTER 9. OPEN NETWORK OPERATIONS .................................................................. 9–1

9.1 Introduction.................................................................................................................................9–1

9.2 IBS ................................................................................................................................................ 9–1

9.2.1 IBS Clock/data recovery and De-jitter.................................................................................. 9–2

9.2.2 IBS Framing..........................................................................................................................9–2

9.2.3 IBS Engineering Service Channel......................................................................................... 9–2

9.2.4 IBS Scrambling..................................................................................................................... 9–2

9.3 Drop and Insert ........................................................................................................................... 9–2

9.3.1 D&I Primary Data Interfaces ................................................................................................9–3

9.3.2 D&I Framing......................................................................................................................... 9–3

9.4 IDR ...............................................................................................................................................9–4

9.4.1 IDR Primary Data Interfaces................................................................................................. 9–5

9.4.2 IDR Engineering Service Channel........................................................................................ 9–5

CHAPTER 10. CLOCK MODES AND DROP AND INSERT (D&I) ....................................10–1

10.1 Transmit Clocking ....................................................................................................................10–1

10.1.1 Internal Clock...................................................................................................................... 10–1

10.1.2 Tx Terrestrial ......................................................................................................................10–2

10.1.3 Rx Loop-Timed, RX=TX.................................................................................................... 10–2

10.1.4 Rx Loop-Timed, RX<>TX (Asymmetric Loop Timing).................................................... 10–2

10.1.5 External Clock ....................................................................................................................10–2

10.2 Receive Clocking ....................................................................................................................... 10–3

10.2.1 Buffer Disabled (RX Satellite)............................................................................................ 10–3

10.2.2 Buffer Enabled, TX=RX (TX Terrestrial or External Clock) ............................................. 10–3

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CDM-600 Satellite Modem Revision 7 Preface MN/CDM600.IOM

10.2.3 Buffer Enabled, RX<>TX (TX Terrestrial or External Clock)...........................................10–3

10.3 X.21 Notes .................................................................................................................................. 10–3

10.4 Drop and Insert ......................................................................................................................... 10–6

10.5 Frame Formats.......................................................................................................................... 10–7

10.6 Time Slot Selection.................................................................................................................... 10–8

10.7 Drop and Insert Clocking......................................................................................................... 10–9

10.8 Rx Buffer Clock = Insert (D&I only) ....................................................................................10–10

10.9 Single-Source Multiple Modems............................................................................................ 10–10

CHAPTER 11. EDMAC CHANNEL ..................................................................................... 11–1

11.1 Theory Of Operation ................................................................................................................11–1

11.2 M&C Connection ...................................................................................................................... 11–2

11.3 Setup Summary......................................................................................................................... 11–3

11.4 Drop & Insert ++....................................................................................................................... 11–4

CHAPTER 12. AUTOMATIC UPLINK POWER CONTROL ..............................................12–1

12.1 Introduction............................................................................................................................... 12–1

12.2 Setting AUPC Parameters........................................................................................................ 12–2

12.2.1 Target Eb/No....................................................................................................................... 12–2

12.2.2 Max Range .......................................................................................................................... 12–2

12.2.3 Alarm ..................................................................................................................................12–3

12.2.4 Demod Unlock .................................................................................................................... 12–3

12.3 Compensation Rate................................................................................................................... 12–3

12.4 Monitoring................................................................................................................................. 12–4

CHAPTER 13. ESC++ .........................................................................................................13–1

13.1 Introduction............................................................................................................................... 13–1

13.2 Overhead Details....................................................................................................................... 13–1

13.3 Available Baud Rates................................................................................................................ 13–2

13.4 Configuration ............................................................................................................................ 13–2

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CDM-600 Satellite Modem Revision 7 Preface MN/CDM600.IOM

13.5 Effect on Eb/No performance ..................................................................................................13–2

CHAPTER 14. FLASH UPGRADING..................................................................................14–1

CHAPTER 15. SUMMARY OF SPECIFICATIONS ............................................................. 15–1

15.1 Modulator.................................................................................................................................... 15–1

15.2 Demodulator ...............................................................................................................................15–3

15.3 Data Interfaces ............................................................................................................................15–6

15.4 Automatic Uplink Power Control ...............................................................................................15–7

15.5 Framing Summary ......................................................................................................................15–7

15.6 Data Rate Ranges........................................................................................................................ 15–8

15.7 Miscellaneous............................................................................................................................. 15–9

15.8 Approvals....................................................................................................................................15–9

CHAPTER 16. REMOTE CONTROL...................................................................................16–1

16.1 Introduction............................................................................................................................... 16–1

16.2 EIA-485 ...................................................................................................................................... 16–1

16.3 EIA-232 ...................................................................................................................................... 16–2

16.4 Basic Protocol............................................................................................................................ 16–2

16.5 Packet Structure........................................................................................................................ 16–3

16.5.1 Start Of Packet ....................................................................................................................16–3

16.5.2 Address ...............................................................................................................................16–3

16.5.3 Instruction Code..................................................................................................................16–4

16.5.4 Instruction Code Qualifier ..................................................................................................16–4

16.5.5 Message Arguments............................................................................................................ 16–5

16.5.6 End Of Packet ..................................................................................................................... 16–5

16.6 Alphabetical list of Remote Commands..................................................................................16–6

APPENDIX A. CABLE DRAWINGS..................................................................................... A–1

APPENDIX B. EB/NO MEASUREMENT.............................................................................. B–1

APPENDIX C. FAST ACTIVATION PROCEDURE.............................................................. C–1

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CDM-600 Satellite Modem Revision 7 Preface MN/CDM600.IOM

C.1 Introduction................................................................................................................................ C–1

C.2 Activation Procedure ................................................................................................................. C–1

C.2.1 Serial Number ...................................................................................................................... C–1

C.2.2 View currently installed features ......................................................................................... C–2

C.2.3 Enter Access Codes..............................................................................................................C–2

APPENDIX D. ODU OPERATION........................................................................................ D–1

D.1 Introduction................................................................................................................................ D–1

D.2 MENU TREES .................................................................................................................... D–2

INDEX .......................................................................................................................................I–1

Tables

Table 5-1. External Connections.............................................................................................................. 5–1

Table 5-2. BNC Connectors ..................................................................................................................... 5–2

Table 5-3. Overhead Interface Connector Pin Assignments ...................................................................5–2

Table 5-4. Data Interface Connector Pin Assignments............................................................................ 5–3

Table 5-5. Audio Interface Connector Pin Assignments ..........................................................................5–4

Table 5-6. Remote Control Interface Connector Pin Assignments .......................................................... 5–4

Table 5-7. IDR Alarm Interface Connector Pin Assignments................................................................... 5–5

Table 5-8. Alarm Interface Connector Pin Assignments.......................................................................... 5–5

Table 5-9. Auxiliary Serial Connector (USB Type B Socket) ................................................................... 5–6

Table 5-10. Balanced G.703 Interface Connector Pin Assignments .......................................................5–6

Table 6-1. Front Panel LED Indicators..................................................................................................... 6–2

Table 7-1. Viterbi Decoding Summary ..................................................................................................... 7–2

Table 7-2. Sequential Decoding Summary ..............................................................................................7–3

Table 7-3. Concatenated RS Coding Summary.......................................................................................7–4

Table 7-4. 8-PSK/TCM Coding Summary................................................................................................7–5

Table 7-5. Available TPC and LDPC Modes............................................................................................7–8

Table 7-6. Turbo Product Coding Processing Delay Comparison ........................................................... 7–9

Table 7-7. TPC and LDPC Summary.....................................................................................................7–11

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CDM-600 Satellite Modem Revision 7 Preface MN/CDM600.IOM

Figures

Figure 1-1. CDM-600 ...............................................................................................................................1–1

Figure 2-1. Installation of the Optional Mounting Bracket, KT/6228-2..................................................... 2–3

Figure 3-1. CDM-600 Modem Block Diagram.......................................................................................... 3–2

Figure 4-1. Front Panel ............................................................................................................................4–1

Figure 4-2. Rear Panel.............................................................................................................................4–2

Figure 4-3. Dimensional Envelope...........................................................................................................4–6

Figure 6-1. Front Panel View ...................................................................................................................6–1

Figure 6-2. Keypad................................................................................................................................... 6–3

Figure 6-3. Menu Trees............................................................................................................................6–4

Figure 6-4. Loopback Modes ................................................................................................................. 6–31

Figure 7-1. Viterbi Decoding ..................................................................................................................7–13

Figure 7-2. Sequential Decoding 64 kbps............................................................................................. 7–14

Figure 7-3. Sequential Decoding 1024 kbps.......................................................................................... 7–15

Figure 7-4. Sequential Decoding 2048 kbps.......................................................................................... 7–16

Figure 7-5. Viterbi with concatenated R-S Outer Code .........................................................................7–17

Figure 7-6. Sequential with concatenated R-S Outer Code................................................................... 7–18

Figure 7-7. 8-PSK/TCM Rate 2/3 with and without concatenated RS Outer Code ...............................7–19

Figure 7-8. Comtech EF Data Turbo Product Codec Rate 3/4 QPSK/OQPSK, 8-PSK and 16-QAM.. 7–20 Figure 7-9. Comtech EF Data Turbo Product Codec Rate 7/8 QPSK/OQPSK, 8-PSK and 16-QAM.. 7–21

Figure 7-10. Rate 1/2 QPSK, Rate 0.95 QPSK and Rate 0.95 8-PSK .................................................. 7–22

Figure 7-11. Rate 21/44 BPSK and Rate 5/16 BPSK Turbo.................................................................. 7–23

Figure 7-12. 16-QAM Viterbi, Rate 3/4 and Rate 7/8 with 220,200 RS Outer Code .............................7–24

Figure 7-13. Differential Encoding - No FEC, No Scrambling................................................................ 7–25

Figure 7-14. LDPC, Rate 1/2, BPSK, (O)QPSK.....................................................................................7–26

Figure 7-15. LDPC, Rate 2/3, (O)QPSK/8-PSK/8-QAM ........................................................................ 7–27

Figure 7-16. LDPC, Rate 3/4, (O)QPSK/8-QAM.................................................................................... 7–28

Figure 7-17. LDPC, Rate 3/4, 8-PSK / 8-QAM.......................................................................................7–29

Figure 10-1 Tx Clock Modes.................................................................................................................. 10–4

Figure 10-2 Rx Clock Modes .................................................................................................................10–5

Figure 10-3 Supported T1 and E1 Framing formats .............................................................................. 10–7

Figure 10-4 Drop and Insert Clocking .................................................................................................... 10–9

Figure 10-5. Single-Source Multiple Modems (Looming) .....................................................................10–10

Figure 10-6. Single-Source Multiple Modems (Daisy Chain)................................................................ 10–11

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Customer Service

Contact the Comtech EF Data Customer Support Department for:

• Product support or training

• Information on upgrading or returning a product

• Reporting comments or suggestions concerning manuals

A Customer Support representative may be reached at:

Comtech EF Data Attention: Customer Support Department 2114 West 7th Street Tempe, Arizona 85281 USA

480.333.2200 (Main Comtech EF Data Number)

480.333.4357 (Customer Support Desk)

480.333.2161 FAX

or, E-mail can be sent to the Customer Support Department at: service@comtechefdata.com Contact us via the web at www.comtechefdata.com.

To return a Comtech EF Data product (in-warranty or out-of-warranty) for repair or replacement:

• Request a Return Material Authorization (RMA) number from the Comtech EF Data

Customer Support Department.

• Be prepared to supply the Customer Support representative with the model number,

serial number, and a description of the problem.

• To ensure that the product is not damaged during shipping, pack the product in its

original shipping carton/packaging.

• Ship the product back to Comtech EF Data. (Shipping charges should be prepaid.)

For more information regarding the warranty policies, see Warranty Policy, p. xiv.

Preface

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CDM-600 Satellite Modem Revision 7 Preface MN/CDM600.IOM

About this Manual

This manual provides installation and operation information for the Comtech EF Data CDM-600 satellite modem. This is a technical document intended for earth station engineers, technicians, and operators responsible for the operation and maintenance of the CDM-600.

Conventions and References

Metric Conversion

Metric conversion information is located on the inside back cover of this manual. This information is provided to assist the operator in cross-referencing English to Metric conversions.

Cautions and Warnings

Indicates information critical for proper equipment function.

IMPORTANT

WARNING indicates a potentially hazardous situation that,

WARN ING

if not avoided, could result in death or serious injury.

Recommended Standard Designations

Recommended Standard (RS) designations are equivalent to the new designation of the Electronic Industries Association (EIA). Manuafacturer has determined to use only one reference throughout the manual. However, there may be an instance on illustrations that either designator may be used.

Reporting Comments or Suggestions Concerning this Manual

Comments and suggestions regarding the content and design of this manual will be appreciated. To submit comments, please contact the Comtech EF Data Technical Publications Department: techpub@comtechefdata.com.

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Electrical Safety

The CDM-600 Modem has been shown to comply with the following safety standard:

• EN 60950: Safety of Information Technology Equipment, including

electrical business machines.

The equipment is rated for operation over the range 100 - 240 volts AC. It has a maximum power consumption of 40 watts, and draws a maximum of 400 mA.

The user should observe the following instructions:

IMPORTANT

Fuses

The CDM-600 is fitted with two fuses - one each for line and neutral connections. These are contained within the body of the IEC power inlet connector, behind a small plastic flap.

• For 230 volt AC operation, use T0.75A, 20mm fuses.

• For 115 volt AC operation, use T1.25A fuses, 20mm fuses.

FOR CONTINUED OPERATOR SAFETY, ALWAYS REPLACE THE FUSES WITH THE CORRECT TYPE AND RATING.

Environmental

The CDM-600 must not be operated in an environment where the unit is exposed to extremes of temperature outside the ambient range 0 to 50°C, precipitation, condensation, or humid atmospheres above 95% RH, altitudes (un-pressurised) greater than 2000 metres, excessive dust or vibration, flammable gases, corrosive or explosive atmospheres.

Operation in vehicles or other transportable installations that are equipped to provide a stable environment is permitted. If such vehicles do not provide a stable environment, safety of the equipment to EN60950 may not be guaranteed.

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Installation

The installation and connection to the line supply must be made in compliance to local or national wiring codes and regulations.

The CDM-600 is designed for connection to a power system that has separate ground, line and neutral conductors. The equipment is not designed for connection to power system that has no direct connection to ground.

The CDM-600 is shipped with a line inlet cable suitable for use in the country of operation. If it is necessary to replace this cable, ensure the replacement has an equivalent specification. Examples of acceptable ratings for the cable include HAR, BASEC and HOXXX-X. Examples of acceptable connector ratings include VDE, NF-USE, UL, CSA, OVE, CEBEC, NEMKO, DEMKO, BS1636A, BSI, SETI, IMQ, KEMA-KEUR and SEV.

International Symbols:

Symbol Definition Symbol Definition

Alternating Current

Fuse

Telecommunications Terminal Equipment Directive

In accordance with the Telecommunications Terminal Equipment Directive 91/263/EEC, this equipment should not be directly connected to the Public Telecommunications Network.

Protective Earth

Chassis Ground

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EMC (Electromagnetic Compatibility)

In accordance with European Directive 89/336/EEC, the CDM-600 Modem has been shown, by independent testing, to comply with the following standards:

Emissions: EN 55022 Class B - Limits and methods of measurement of radio

interference characteristics of Information Technology Equipment.

(Also tested to FCC Part 15 Class B)

Immunity: EN 50082 Part 1 - Generic immunity standard, Part 1: Domestic,

commercial and light industrial environment.

Additionally, the CDM-600 has been shown to comply with the following standards:

EN 61000-3-2 Harmonic Currents Emission EN 61000-3-3 Voltage Fluctuations and Flicker EN 61000-4-2 ESD Immunity EN 61000-4-4 EFT Burst Immunity EN 61000-4-5 Surge Immunity EN 61000-4-6 RF Conducted Immunity EN 61000-4-8 Power frequency Magnetic Field Immunity EN 61000-4-9 Pulse Magnetic Field Immunity EN 61000-4-11 Voltage Dips, Interruptions, and Variations Immunity EN 61000-4-13 Immunity to Harmonics

In order that the Modem continues to comply with these standards, observe the following instructions:

IMPORTANT

• Connections to the transmit and receive IF ports (BNC female connectors) should be made using a good quality coaxial cable - for example RG58/U (50Ω or RG59/U (75Ω).

• All 'D' type connectors attached to the rear panel must have back-shells that provide continuous metallic shielding. Cable with a continuous outer shield (either foil or braid, or both) must be used, and the shield must be bonded to the back-shell.

• The equipment must be operated with its cover on at all times. If it becomes necessary to remove the cover, the user should ensure that the cover is correctly re-fitted before normal operation commences.

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Warranty Policy

This Comtech EF Data product is warranted against defects in material and workmanship for a period of 2 years from the date of shipment. During the warranty period, Comtech EF Data will, at its option, repair or replace products that prove to be defective.

For equipment under warranty, the customer is responsible for freight to Comtech EF Data and all related custom, taxes, tariffs, insurance, etc. Comtech EF Data is responsible for the freight charges only for return of the equipment from the factory to the customer. Comtech EF Data will return the equipment by the same method (i.e., Air, Express, Surface) as the equipment was sent to Comtech EF Data.

Limitations of Warranty

The foregoing warranty shall not apply to defects resulting from improper installation or maintenance, abuse, unauthorized modification, or operation outside of environmental specifications for the product, or, for damages that occur due to improper repackaging of equipment for return to Comtech EF Data.

No other warranty is expressed or implied. Comtech EF Data specifically disclaims the implied warranties of merchantability and fitness for particular purpose.

Exclusive Remedies

The remedies provided herein are the buyer's sole and exclusive remedies. Comtech EF Data shall not be liable for any direct, indirect, special, incidental, or consequential damages, whether based on contract, tort, or any other legal theory.

Disclaimer

Comtech EF Data has reviewed this manual thoroughly in order that it will be an easy-touse guide to your equipment. All statements, technical information, and recommendations in this manual and in any guides or related documents are believed reliable, but the accuracy and completeness thereof are not guaranteed or warranted, and they are not intended to be, nor should they be understood to be, representations or warranties concerning the products described. Further, Comtech EF Data reserves the right to make changes in the specifications of the products described in this manual at any time without notice and without obligation to notify any person of such changes.

If you have any questions regarding your equipment or the information in this manual, please contact the Comtech EF Data Customer Support Department.

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Chapter 1. INTRODUCTION

The CDM-600 (Figure 1-1) is an Open Network Satellite Modem, intended for both Intelsat and closed network applications.

• It is compliant with IESS-308/309/310/315 specifications, but also adds significant other features in closed network modes.

• It offers variable data rates from 2.4 to 20 Mbps, in BPSK, QPSK, Offset QPSK, 8-PSK, 8-QAM and 16-QAM modes. Viterbi, Sequential, concatenated ReedSolomon (RS), Trellis Coded Modulation (TCM), Turbo Product Coding (TPC) and Low-density Parity Check Coding (LDPC) are provided as Forward Error Correction (FEC) options.

• A full range of interface types is built in (no plug in cards required) including all G.703 types, and Drop and Insert (both Open and Closed Network) operation are available.

• The IF frequency range simultaneously covers 52 - 88 MHz and 104 - 176 MHz.

(Units manufactured after February 2005 cover 50 - 90 MHz and 100 - 180 MHz. The opening screen shows CDM-600(E)- meaning Extended IF range. )

• The modem is compact, 1U high and 12 inches deep, and consumes only 25 watts (typical).

• It has a front panel VFD display and keypad for local configuration and control, although it can be fully remote-controlled.

Figure 1-1. CDM-600

1–1

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1.1 Standard Features

The CDM-600 provides a wealth of standard features which go far beyond the basic requirements of the Intelsat specifications.

• Low rate variable data rates – 2.4 kbps to 5.0 Mbps

• Mid-rate variable data rates – 2.4 kbps to 10.0 Mbps

• High-rate variable data rates – 2.4 kbps to 20.0 Mbps

• Embedded Distant-end Monitor and Control (EDMAC) (see Note)

• Selectable 50Ω / 75Ω IF port impedance

• Asymmetric Loop Timing

• Automatic Uplink Power Control (AUPC)

• Software – Flash Upgrading

• Modulation Types –BPSK, QPSK, and OQPSK

• 1:1 and 1:10 redundancy switches

Note: In this mode, an additional 5% overhead is combined with the traffic data, (1.5% in Turbo BPSK modes, Turbo Rate 1/2 QPSK/OQPSK, and all data rates greater than 2 Mbps) which permits Monitor & Control (M&C) information to be added (transparently to the user), allowing access to the distant-end modem. This mode does not require any additional cabling at either the local or distant-end Modems - access to EDMAC is via the standard M&C control port. Full M&C is possible, and importantly, the on/off status of the carrier at the distant-end carrier can be controlled. In addition, for firmware version 1.5.0 and higher, the proprietary D&I++ framing mode is available. This combines Drop & Insert (D&I) operation with a similar EDMAC link and a 2.2% overhead.

1.1.1 AUPC

An important innovation in the CDM-600 is the addition of Automatic Uplink Power Control (AUPC). This feature enables the modem to automatically adjust its output

power to maintain the Eb/No of the remote end of the satellite link constant. This provides protection against rain fading, a particularly severe problem with Ku-band links.

To accomplish this, either the EDMAC or D&I++ framing types may be used, and the distant end modem constantly sends back information about the demodulator Eb/No using reserved bytes in the overhead structure. Using the Eb/No, the local modem then adjusts its output power, and hence, a closed-loop feedback system is created over the satellite link.

A benefit of this feature is that whenever EDMAC or D&I++ with AUPC operation is selected, the remote demodulator’s Eb/No can be viewed from the front panel display of the local modem. Note that EDMAC and D&I++ can be used in conjunction with either framing type.

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1.1.2 Software – Flash Upgrading

The internal software is both powerful and flexible, permitting storage and retrieval of up to 10 different modem configurations. The modem uses ‘flash memory’ technology internally, and new firmware can be uploaded to the unit from an external PC. This simplifies software upgrading, and updates can now be sent via the Internet, e-mail, or on disk. The upgrade can be performed without opening the unit, by simply connecting the modem to the serial port of a computer. Refer to Chapter 13 Flash Upgrading for additional information.

1.1.3 Verification

The unit includes many test modes and loopbacks for rapid verification of the correct functioning of the unit. Of particular note is the IF loopback, which permits the user to perform a quick diagnostic test without having to disturb external cabling. During the loopback, all of the receive configuration parameters are temporarily changed to match those of the transmit side, and an internal RF switch connects the modulator output to the demodulator input. When normal operation is again selected, all of the previous values are restored.

1.1.4 Data Interfaces

The CDM-600 includes, as standard, a universal data interface that eliminates the need to exchange interface cards for different applications. The interfaces offered include:

• EIA-422 (EIA530) DCE (at rates up to 10 Mbps)

• X.21 DTE and DCE (at rates up to 10 Mbps)

• V.35 DCE (at rates up to 10 Mbps)

• Synchronous EIA-232 DCE (at rates up to 300 kbps)

• G.703 E1, balanced and unbalanced

• G.703 T1, balanced

• G.703 E2, balanced and unbalanced

• G.703 T2, balanced

• Serial LVDS (at rates up to 20 Mbps)

• Dual Audio, 600Ω (produces a single 64 kbps IBS data stream)

• HSSI (optional with CIC-20 interface converter)

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1.2 Major Assemblies

Assembly Description

AS/11229-1 Modem Card – Extended IF bandwidth - units manufactured after February 2005 AS/0424-1 Modem Card – Standard IF bandwidth - units manufactured before February 2005 AS/0463 Turbo Codec – low rate AS/9436 Turbo Codec – high rate PL/9076-1 Baseband Framing Card PL/9122-1 Chassis PL/10290 High Stability Reference (Part of KT/9585-1) PL/10341-1 LDPC and Hight RateTurbo Codec KT/9585-1 High Stability Reference (Consult factory for availability)

1.3 FAST Options and Hardware Options

The CDM-600 is extremely flexible and powerful, and incorporates a large number of optional features. Some customers may not require all of these features, and therefore, in order to permit a lower initial cost, the modem may be purchased with only the desired features enabled. If, at a later date, a customer wishes to upgrade the functionality of a modem, Comtech EF Data provides a system known as FAST (Fully Accessible System Topology) which permits the purchase and installation of options through the use of special authorization codes, entered through the front panel, or remotely.

The base unit is equipped with Viterbi, Sequential and R-S codecs. It offers BPSK, QPSK, and OQPSK modulation types, and data rates up to 5.0 Mbps, with all interface types. It is, however, limited to Closed Network operation, but includes EDMAC and AUPC.

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The following table shows what other options are available:

Option

Option Description and Comments

Low Rate Variable Data rate 2.4 kbps to 5.0 Mbps BASE UNIT Mid-Rate Variable Data rate 2.4 kbps to 10.0 Mbps FAST Full Rate Variable Data rate 2.4 kbps to 20.0 Mbps FAST 8-PSK Modulation Type

(includes 8-QAM if the TPC / LDPC Codec

is installed) 16-QAM Modulation Type FAST High Rate IBS ESC 20 bits per Frame FAST IBS Intelsat Business Services – IESS-309 FAST IDR Intermediate Data Rate – IESS-308 FAST D&I Drop and Insert (includes D&I++) FAST Dual Audio mode 2 x 32 kbps ADPCM Audio as primary data FAST

Turbo Codec – Low Rate (1st Gen) 5 Mbps TPC Codec Hardware Turbo Codec – High Rate (2nd Gen) 20 Mbps TPC Codec Hardware TPC / LDPC Codec 20 Mbps TPC/LDPC Codec Hardware LDPC (Mid-Rate) Data rate to 10 Mbps FAST LDPC (High-Rate) Data rate to 20 Mbps FAST High Stability Reference Internal/External 10 MHz reference - 2 x 10-8 Hardware

Installation method

FAST

In order to operate in Turbo (TPC) Mode:

To operate in the the Low Rate range (up to 5 Mbps), the modem requires any of the three Codec cards to be installed.

To operate in the Mid- or High-Rate ranges (up to 10 or 20 Mbps), the modem requires either the High Rate TPC Codec or the TPC / LDPC Codec to be installed.

In order to operate in LDPC Mode:

The unit will require the TPC/LDPC Codec to be installed. In the base configuration this will provide LDPC up to 5 Mbps. In order to operate at higher data rates, there are two additional FAST options available that permit operation up to 10 Mbps or 20 Mbps. Note that these are in addition to the base modem rate options.

In order to operate in 8-QAM mode: The modem will require the TPC/LDPC Codec to be installed and have the 8-PSK / 8QAM FAST option enabled.

For example, if LDPC operation at 20 Mbps, 8-QAM mode is required, the modem must be configured with the following:

• TPC/LDPC Codec hardware option

• Full rate variable FAST option

• High-Rate LDPC FAST option

• 8-PSK /8-QAM FAST option

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1.3.1 FAST Accessible Options

Comtech EF Data’s FAST system allows immediate implementation of different options through the user interface keypad. All FAST options are available through the basic platform unit.

1.3.2 FAST System Theory

FAST is an enhancement feature available in Comtech EF Data products, enabling onlocation upgrade of the operating feature set - in the rack - without removing a modem from the setup. When service requirements change, the operator can upgrade the topology of the modem to meet those requirements within minutes after confirmation by Comtech EF Data. This accelerated upgrade can be accomplished only because of FAST’s extensive use of programmable devices incorporating Comtech EF Data-proprietary signal processing techniques. These techniques allow the use of a unique access code to enable configuration of the available hardware. The access code can be purchased at any time from Comtech EF Data. Once obtained, the access code is loaded into the unit through the front panel keyboard or the rear remote port.

With the exclusive FAST technology, operators have maximum flexibility for enabling functions as they are required. FAST allows an operator to order a modem precisely tailored for the initial application.

1.3.3 Implementation

FAST is factory-implemented in the modem at the time of order. Hardware options for basic modems can be ordered and installed either at the factory or in the field. The operator can select options that can be activated easily in the field, depending on the current hardware configuration of the modem. The Activation Procedure is described in Appendix C.

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1.3.4 Hardware Options

There are four hardware options available:

1) Low Rate (1 module). This is capable of data rates up to 5 Mbps, and code rates limited to Rate 5/16 (BPSK, Rate 21/44 (BPSK) and Rate 3/4 (QPSK, OQPSK, 8-PSK and 16QAM).

2) High Rate (2 module). This is capable of data rates up to 20 Mbps, and adds Rate 7/8 and Rate

0.95 capability.

3) Combination Low-density Parity Check (LDPC) and TPC Codec - a plug-in daughter card (SIMM module). This is capable of data rates up to 20 Mbps, and provides Rate 1/2, Rate 2/3 and Rate 3/4 code rates across the range of modulation types.

4) Internal/External High Stability Reference that provides a frequency stability of 2 x

-8

. This may be fitted in the factory at the time of order, or fitted in the field as an upgrade (provided the CDM-600 was manufactured after a certain date - consult the factory for further information).

* The option provides an additional connector on the rear panel to permit the connection of a high-stability external reference signal, which in turn will phase-lock all of the internal frequency generation circuits of the CDM-600, including the IF synthesizers.

* The new connector is an SMA female type, located at the extreme right of the rear panel (when looking at the rear panel). This connector accepts signals at 1, 2, 5, 10 or 20MHz, over the range -5 dBm to +15 dBm, and is matched for both 50 and 75 Ω systems. The frequency is selected from either the front panel, or over the remote control interface.

* If the user selects external reference operation, the unit expects to see an appropriate signal at this connector. If the monitor circuit does not sense a signal at the connector, a Traffic Alarm is generated, and the High-Stability Internal Reference (stability of 5 x 10

* If the user selects Internal Reference, the user may then adjust the exact frequency of the reference using the front panel, or the remote control interface.

* In External mode the High-Stability Internal/External Reference Module works by phase-locking the Internal Reference to the externally applied signal. If for some reason (perhaps an incorrect frequency being applied) the PLL circuit senses a loss of lock, a Unit Alarm is generated, and the TX carrier will be muted.

* Because the High-Stability Internal Reference is comprised of an Ovenized Crystal Oscillator (OCXO) there is a warm up period associated with this scheme. The user

Generation) Turbo Product Codec - a plug-in daughter card (SIMM

-8

) is automatically substituted.

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may select, either from the front panel, or via the remote control, to have the unit:

Power-up instantly (in which case the frequency of the unit will drift until the

oven has reached its correct operating temperature),

OR:

Select a warm-up delay, where the unit will not become operational until the

oven has reached a temperature close to stabilization value.

Notes :

* The CDM-600 uses an intelligent algorithm that takes into account the internal

temperature of the unit, and the amount of time it has been powered down. In this

way, the unit does not wait for the full period (which can be as much as 200

seconds) if power is cycled over a short time.

* If the warm-up feature has been activated, the time-out period can be instantly

terminated by pressing the CLEAR key on the front panel.

1.3.5 Supporting Hardware and Software

For 1:1 applications the CDM-600 is supported by the CRS-150, a low-cost external switch. For Hub applications, the CDM-600 is supported by a low-cost 1:N switch, the CRS-300.

The CDM-600 is a companion product for the Comtech EF Data line of RF Transceivers. The Modem incorporates an FSK serial link that can be activated on the Receive IF port for the purpose of communicating with a Transceiver, if connected. In this manner, a user may monitor, configure, and control the Transceiver, using the front panel display and keypad of the Modem. The EDMAC channel may also be used to convey M&C data to a Transceiver at the distant end of a satellite link, if it is connected to a CDM-600.

The CDM-600 is supported by Comtech EF Data’s SatMac software, a Windows based application that provides a ‘point and click’ interface for complete systems of Comtech equipment, comprising Modems, Transceivers, and Redundancy Switches. For more information, or to order a free demo disk, please contact the factory.

1.4 Compatibility

The CDM-600 is fully backwards-compatible with the Comtech EF Data CDM-500, CDM-550, and CDM-550T modems. Being an Open Network Modem, the CDM-600 is fully compatible with modems from other manufacturers that are compliant with the IESS-308/309/310/314 specifications. Note, however, that IESS-315 (VSAT Turbo) defines closed network operation, and this therefore requires modems from the same manufacturer at both ends of the link.

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1.5 New in this Release

Revision 7 of this document includes information on the the following new features:

* Low-Density Parity Check (LDPC) Codec (available in Firmware Version 1.6.0 onwards). This is the latest form of Forward Error Correction, giving enhanced performance when compared to some TPC modes. This is a plug-in module that also includes all of the 2 Firmware Version 1.6.0 onwards. Please see Chapter 7 for more details.

* 8-QAM – a new modulation scheme included specifically to replace 8-PSK when LDPC is used. It is only available when the LDPC codec is installed, and is supported in Firmware Version 1.6.0 onwards. Please see Chapter 7 for more details.

* A higher-throughput ESC type, called ESC++ . This new mode permits an async ESC rate of up 38.4 kbaud at a user data rate of 512 kbps (up to 4.8 kbaud at 64 kbps), while simultaneously permitting AUPC operation. This naturally uses more overhead than previous modes, although the percentage overhead reduces significantly at higher data rates. This is now a standard feature in Firmware Version 2.0.1 onwards. Please see Chapter 13 for more details.

* Extended IF frequency range (50 - 90 MHz and 100 - 180 MHz) for modems manufactured after February 2005. A new modem card has been developed for this wider IF bandwidth, which replaces the previous design. CDM-600 modems fitted with this new card are identified in the opening screen as CDM-600(E), where the ‘E’ refers to Extended IF range. In addition to the new card, the modem requires Firmware Version

2.0.1 or higher.

* A Power-On, Carrier-Off (POCO) feature has been added to the Factory Menu.

* When this option is set to OFF, the CDM-600 will power-up with the Tx

Carrier in the last known state. (For example, if the Tx Carrier was ON, and then

the power is cycled, the Tx Carrier will be turned ON once more.)

NOTE THAT THIS IS THE DEFAULT OPERATING MODE OF THE

CDM-600, AND IT IS RECOMMENDED THAT THE USER LEAVE THE

UNIT CONFIGURED IN THIS WAY.

* When this option is set to ON, the CDM-600 will always power-up with the

Tx Carrier in the OFF state. The user must then, either through the front panel, or

the remote control port, turn the Carrier ON in order for the unit to transmit a

carrier.

Consult the factory for details of how to access the Factory Menu.

Generation TPC functionality. This new codec is supported in in

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CDM-600 Satellite Modem Revision 7 Introduction MN/CDM600.IOM

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Page 43

Chapter 2. INSTALLATION

2.1 Unpacking

Inspect shipping containers for damage. If shipping containers are damaged, keep them until the contents of the shipment have been carefully inspected and checked for normal operation.

The modem and manual are packaged in pre-formed, reusable, cardboard cartons containing foam spacing for maximum shipping protection.

Do not use any cutting tool that will extend more than 1 inch into the container. This can cause damage to the modem.

CAUTION

Unpack the modem as follows:

1. Cut the tape at the top of the carton indicated by OPEN THIS END.

2. Remove the cardboard/foam space covering the modem.

3. Remove the modem, manual, and power cord from the carton.

4. Save the packing material for storage or reshipment purposes.

5. Inspect the equipment for any possible damage incurred during shipment.

6. Check the equipment against the packing list to ensure the shipment is correct.

7. Refer to the following sections for further installation instructions.

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CDM-600 Satellite Modem Revision 7 Installation MN/CDM600.IOM

2.2 Mounting

If the CDM-600 is to be mounted in a rack, ensure that there is adequate clearance for ventilation, particularly at the sides. In rack systems where there is high heat dissipation, forced air cooling must be provided by top or bottom mounted fans or blowers. Under no circumstance should the highest internal rack temperature be allowed to exceed 50°C (122°F).

The CDM-600 CANNOT have rack slides mounted to the side of the chassis - two cooling fans are mounted on the right-hand side of the unit.

However, Comtech EF Data recommends that an alternate method of

IMPORTANT

Optional rear-mounting installation bracket

Install optional installation bracket (Figure 2-1) using mounting kit, KT/6228-2.

support within the rack be employed, such as rack shelves. If there is any doubt, please consult the Comtech EF Data Customer Support department.

Optional: Mounting Kit , KT/6228-2

Quantity Part Number Description

4 HW/10-32x1/2RK Bolt, #10 Rack

2 HW/10-32HEXNUT Nut, #10 Hex

2 HW/10-32FLT Washer, #10 Flat

2 HW/10-32X1/4 SHC Screw, Socket 10-32 x 1/4inch

FP/6138-1 Bracket, Rear Support

The tools required for this installation are a medium Phillips screwdriver, and a 5/32-inch SAE Allen Wrench.

Refer to the following Figure, then install the Modem rear support brackets as follows:

a) Install the rear support brackets onto the mounting rail of the rack. Fasten with the

bracket bolts.

b) Mount the modem into the equipment rack ensuring that the socket heads engage into

the modem slots of the rear support brackets.

c) Fasten the provided #10 socket head screws to the rear-side mounting slots on either

side of the chassis modem and secure with #10 flat washers and #10 hex nuts.

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CDM-600 Satellite Modem Revision 7 Installation MN/CDM600.IOM

Equipment

Rack

Mounting

Rail

BRACKET

#10 Socket head

BOLTS

* Note: Components of mounting kit KT/6228-1

screw

Support

Bracket

#10 Flat Washer

#10 Hex Nut

Back of Modem

Figure 2-1. Installation of the Optional Mounting Bracket, KT/6228-2

MN/CDM600.IOM 2–3

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CDM-600 Satellite Modem Revision 7 Installation MN/CDM600.IOM

2.3 Configuration

There are no internal jumpers to configure, no interface cards to install, and no other options to install. All configurations are carried out entirely in software. The unit should first be configured locally, using the front panel keypad and display. The unit will ship with a default 64 kbps, QPSK, Rate 1/2 configuration. Please refer to the ‘FRONT PANEL OPERATION’ section for details on how to fully configure the unit for the desired operating parameters.

Note: The auto-sensing AC power supply does not require any adjustments. Simply plug in the supplied line cord, and turn on the switch on the rear panel.

2.4 Select Internal IF Loop

Correct operation of the unit may be verified rapidly, without the need for externally connected equipment. From the top level menu, select TEST, then IF LOOP (refer to the ‘FRONT PANEL OPERATION’ section). The demod should synchronize, and the green RECEIVE TRAFFIC LED should illuminate. If the unit does not pass this test, call Comtech EF Data Customer Support department for assistance.

2.5 Connect External Cables

Having verified correct operation in IF loop, enter the desired configuration, and proceed to connect all external cables. If difficulties occur, please call the factory for assistance.

Note: That the modulator gives an output power level in the range 0 to -20 dBm, and the demodulator expects to see a signal in the range -30 to -60 dBm.

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Chapter 3. FUNCTIONAL

DESCRIPTION

The CDM-600 has two fundamentally different types of interface - IF and data.

• The data interface is a bi-directional path which connects with the customer’s

equipment (assumed to be the DTE) and the modem (assumed to be the DCE).

• The IF interface provides a bi-directional link with the satellite via the uplink and

downlink equipment.

Transmit data is received by the terrestrial interface where line receivers convert the clock and data signals to CMOS levels for further processing. A small FIFO follows the terrestrial interface to facilitate the various clocking and framing options. If framing is enabled, the transmit clock and data output from the FIFO pass through the framer, where the overhead data (IDR, IBS, D&I or EDMAC) is added to the main data. Otherwise, the clock and data are passed directly to the Forward Error Correction encoder. In the FEC encoder, the data is differentially encoded, scrambled, and then convolutionally encoded. Following the encoder, the data is fed to the transmit digital filters, which perform spectral shaping on the data signals. The resultant I and Q signals are then fed to the BPSK, QPSK/OQPSK, 8-PSK, 8-QAM, or 16-QAM modulator. The carrier is generated by a frequency synthesizer, and the I and Q signals directly modulate this carrier to produce an IF output signal.

The RX-IF signal is translated directly to baseband, using the carrier recovery VCO. This is a complex mix, resulting in the signal once more being split into an in-phase (I) and a quadrature (Q) component. An AGC circuit maintains the desired signal level constant over a broad range. Following this, the I and Q signals are sampled by high-speed (flash) A/D converters. All processing beyond this conversion is purely digital, comprising a Costas loop, that performs the functions of Nyquist filtering, carrier recovery, and symbol timing recovery. The resultant demodulated signal is fed, in soft decision form, to the selected FEC decoder (which can be Viterbi, Sequential, TCM, Reed-Solomon, Turbo, LDPC if installed). After decoding, the recovered clock and data pass to the de-framer (if IBS, IDR, D&I or EDMAC framing is enabled) where the overhead information is

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CDM-600 Satellite Modem Revision 7 Functional Description MN/CDM600.IOM

removed. Following this, the data passes to the Plesiochronous/Doppler buffer, which has a programmable size, or may be bypassed. From here, the receive clock and data signals are routed to the terrestrial interface, and are passed to the externally connected DTE equipment.

Physically the CDM-600 modem is comprised of two main card assemblies.

• The first of these is the baseband framer card, which includes all of the interface

circuits, the framer/de-framer, plesiochronous/Doppler buffer, Reed Solomon

outer codec, and the main microcontroller.

• The second card is the modem itself, that performs all of signal processing

functions of modulation, demodulation, and Forward Error Correction.

These functions are shown in Figure 3-1.

TX G703 T1/E1

DEFRAMER AND

INTERFACE

(U46)

TX AUDIO INTERFACE

(U43 & U50)

RS-422, V.35 OR

RS-232 INTERFACE (U63 & U67)

LVD S INTERFACE (U62 & U64)

G703 T2/E2

INTERFACE

(U74)

OVERHEAD

INTERFACES

(U55, 57, 59, 68, & 75)

RX AUDIO INTERFACE

(U60 & U61)

RX G703 T1/E1

DEFRAMER AND

INTERFACE

(U51)

INT CLK

DDS (U33)

TX LINE

DECODING

RX LINE

ENCODING

INSERT

INS CLK

DDS (U42)

BUFFER

BUFFER CLK

DDS (U41)

MUX (U22)

TX FRAMING

(IBS, IDR, D&I

OR EDMAC)

IBS OR EDMAC SCRAM-

BLER

MICROPROCESSOR (U44)

& PROCESSOR FPGA (U49)

RX DE-FRA MING (IBS, IDR, D&I OR

EDMAC)

IBS OR EDMAC

DESCRAMBLER

DEMUX (U19)

AS/0423

BASEBAND

FRAMING

CARD

TX REED-

SOLOMON

WITH

SCRAMB-

LER

(U12)

ENC CLK

DDS (U24)

INS CLK

DDS (U42)

RX REED-

SOLOMON

WITH DESCRAMB-

LER

(U20)

AS/0424 MODEM

CARD

VIT/SEQ/OM73

DESCRAMBLERS

DLF/NCO (U47)

SEQ

ENCODER

VITERBI

& TCM

CODEC

(U48)

TURBO CODEC

W/ SCRAMBLER

& DESCRAMBLE R

LDPC CARD

(OPTIONAL CARD)

SEQ

DEC-

ODER

VIT/SEQ/OM73 SCRAMBLERS

I & Q FILTERS

RECOVERY (U45 )

SYM & BIT

TIMING

RECOVERY

BIT/SYM

DACS (U49)

TXFIR (U61)

TX IF

RX IF

FIR/PD & I/Q

CARRIER

DACS (U52)

Figure 3-1. CDM-600 Modem Block Diagram

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Chapter 4. PHYSICAL

4.1 Introduction

The CDM-600 is constructed as a 1U high rack-mount chassis, which can be freestanding. Rack handles at the front ease removal from and placement into a rack. Figure 4-1 shows the front panel of the modem.

Figure 4-1. Front Panel

DESCRIPTION

4.2 Front Panel

The front panel contains the Vacuum Fluorescent Display (VFD), keypad, and eight LED indicators. The user enters data via the keypad, and messages are displayed on the VFD. The LEDs indicate, in a summary fashion, the status of the unit.

The VFD is an active display showing 2 lines of 40 characters each. It produces a blue light with adjustable brightness. Viewing characteristics are superior to a Liquid Crystal Display (LCD), and do not suffer problems of viewing angle or contrast.

The keypad comprises six individual keyswitches, mounted directly behind a fully sealed membrane overlay. They have a positive ‘click’ action, which provides tactile feedback. These six switches are identified as [↑], [↓], [→], [←] arrows, ENTER and CLEAR. The functions of these keys are described in the ‘Front Panel Operation’ section.

There are 8 LEDs on the front panel. The behavior of these LEDs is also described in the ‘Front Panel Operation’ section.

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CDM-600 Satellite Modem Revision 7 Physical Description MN/CDM600.IOM

4.3 Rear Panel

Figure 4-2. Rear Panel

External cables are attached to connectors on the rear panel of the CDM-600. These comprise:

Name Ref Des Connector Type Function

Rx IF J1 BNC RF Input Tx IF J2 BNC RF Output Aux Serial P6 He1402 3 pin header Auxiliary Serial Overhead P3A 25-pin D (male) Overhead Data Data Interface P3B 25-pin D (female) Data Input/Output External Reference J9 BNC Input Audio P4A 9-pin D (female) Sound Input Remote Control P4B 9-pin D (male) Remote Interface IDR Alarm P5A 15-pin D (female) Alarm Alarms P5B 15-pin D (male) FORM C Alarm Balanced G.703 P7 15-pin D (female) Balanced G.703 Data IDI J10A BNC Insert Data In DDO J11A BNC Drop Data Output Rx Unbalanced J10B BNC Receive G.703 Tx Unbalanced J11B BNC Transmit G.703 External Frequency Ref J12 SMA External IF reference

Input (Optional)

Note: The European EMC Directive (EN55022, EN50082-1) requires using properly shielded cables for DATA I/O. These cables must be double-shielded from end-to-end, ensuring a continuous ground shield.

4.3.1 IEC Line Input Connector

The IEC line input connector contains the ON/OFF switch for the unit. It is also fitted with two fuses - one each for line and neutral connections (or L1, L2, where appropriate). These are contained within the body of the connector, behind a small plastic flap.

• For 230 volt AC operation, use T0.75A, (slow-blow) 20mm fuses.

• For 115 volt AC operation, use T1.25A, (slow-blow) 20mm fuses.

For continued operator safety, always replace the fuses with the correct

IMPORTANT

type and rating.

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CDM-600 Satellite Modem Revision 7 Physical Description MN/CDM600.IOM

4.3.2 Rx and Tx IF Connectors (J1 and J2)

The IF port connectors are both a 50Ω BNC female type. 75Ω cable connectors (male) will have no problem mating with this 50Ω type. The electrical impedance presented by these connectors is controlled internally by an RF-switching arrangement. This selection between 50Ω and 75Ω is controlled either via the front panel menus, or via the remote control bus.

4.3.3 Overhead Data Connector (P3A)

The Overhead data connector is a 25-pin ‘D’ type male (DB25-M). It is used for passing components of INTELSAT specified overhead frame structures. These include 64 kbps EIA-422 and 1/16 IBS overhead ESC at EIA-232. The IDR backward alarm inputs are found on this connector.

4.3.4 Data Interface Connector (P3B)

The Data connector is a 25-pin ‘D’ type female (DB25-F). This connector conforms to the EIA-530 pinout, which allows for connection of different electrical standards, including EIA-422, V.35, and EIA232. A shielded 25-pin ‘D’ type provides a very solid solution to EMC problems, unlike the sometimes used V.35 Winchester connector.

It is the responsibility of the user to provide the appropriate cables to connect to this EIA-530 connector.

IMPORTANT

4.3.5 External Reference Connector (J9)

This is a BNC female connector. It is used for operating the buffer with an external station reference. It requires an EIA-422 compatible level, so this unbalanced input should have a zero volt offset and a swing of at least ± 2V into the 120 Ω termination provided.

4.3.6 Audio Connector (P4A)

The Audio connector is a 9-pin ‘D’ type female (DB9-F). It is used for the two 32 kbps ADPCM audio inputs and outputs (600 Ω transformer coupled, balanced signals). These can be used for both ESC voice circuits in IDR mode, or as the primary data (FAST option).

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4.3.7 Remote Control connector (P4B)

The Remote Control connector is a 9-pin ‘D’ type male (DB-9-M). Access is provide to remote control ports of the modem, both EIA-232 and EIA-485.

4.3.8 IDR Alarm connector (P5A)

The Alarms connector is a 15-pin 'D' type female (DB15-F). Four Form C backward alarm outputs specified by INTELSAT are found on this connector.

4.3.9 Form C Traffic Alarm Connector (P5B)

The Alarms connector is a 15-pin 'D' type male (DB15-M). This provides the user with access to the Form-C relay contacts, which indicate the fault status of the unit. These are typically connected to an external fault monitoring system, often found in satellite earth stations. In addition, the receive I and Q demodulator samples are provided on this connector. Connecting these signals to an oscilloscope in X, Y mode will provide the receive signal constellation diagram, which is a useful diagnostic aid. A pin is also provided which can mute the transmit carrier. This requires that the pin be shorted to ground, or a TTL ‘low’, or an RS232 ‘high’ signal be applied. As an aid to antenna pointing, or for driving step-track equipment, an analog AGC signal is provided on Pin 2 of this connector.

4.3.10 Auxiliary Serial Connector (P6)

This is an additional EIA-232 serial port, which is only used when the modem is part of a 1:1 pair. It uses a USB Type B connector.

Although this port uses a USB connector, the signals are not USB compatible. Do NOT connect this port to the USB port of

WARN ING

a PC, or other computing device.

4.3.11 Balanced G.703 Interface Connector (P7)

A 15-pin 'D' type female (DB15-F) for balanced operation at the G.703 data rates of T1 (1.544 Mbps), E1 (2.048 Mbps) or T2 (6.312 Mbps).

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4.3.12 IDI, DDO Connectors (J10A and J11A)

Two additional female BNC 75Ω connectors for unbalanced operation at the G.703 data rate of E1 (2.048 Mbps). These are the Insert Data In (IDI) and Drop Data Out (DDO) port.

An alternative use for these ports is for sub-rate G.703 auxiliary operation on modems with hardware revision 2.0 or higher. This permits operation at the additional rates of 512 and 1024 kbps. In this mode, IDI serves as the TX terrestrial input port, and DDO as the output port.

4.3.13 Unbalanced G.703 Tx/Rx (J10B and J11B)

Two female BNC 75Ω connectors for unbalanced operation at the G.703 data rates of E1 (2.048 Mbps), T2 (6.312 Mbps), or E2 (8448 kbps).

4.3.14 External Frequency Reference Connector (J12)

connection of a high-stability external reference signal.

This is an SMA female connector. It is an optional connector used to permit the

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CDM-600 Satellite Modem Revision 7 Physical Description MN/CDM600.IOM

4.4 Dimensional Envelope

Figure 4-3. Dimensional Envelope

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Chapter 5. CONNECTOR

5.1 Connector Overview

The rear panel connectors (Figure 5-1) provide all necessary external connections between the modem and other equipment.

Figure 5-1. Rear Panel

Table 5-1. External Connections

Name Ref Connector Type Function

RX IF J1 BNC RF Input TX IF J2 BNC RF Output Aux Serial P6 USB Type B (female) Auxiliary Serial Overhead P3A 25-pin D (male) Overhead Data Data Interface P3B 25-pin D (female) Data Input/Output External Reference J9 BNC Input Audio P4A 9-pin D (female) Audio Signal Input/Output Remote Control P4B 9-pin D (male) Remote Interface IDR Alarm P5A 15-pin D (female) Alarm Alarms P5B 15-pin D (male) FORM C Alarms Balanced G.703 P7 15-pin D (female) Balanced G.703 Data IDI J10A BNC Insert Data In/Sub-rate Auxiliary Tx G.703 In DDO J11A BNC Drop Data Output/ Sub-rate Auxiliary Rx G.703 Out RX Unbalanced J10B BNC Receive G.703 (IDO) TX Unbalanced J11B BNC Transmit G.703 (DDI) External Frequency Reference J12 SMA High-Stability External Reference (Optional) Note: To maintain compliance with the European EMC Directive (EN55022, EN50082-1) properly shielded cables are

required for all data I/O.

PINOUTS

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CDM-600 Satellite Modem Revision 7 Connector Pinouts MN/CDM600.IOM

5.2 BNC Connectors

The BNC connectors are located on the rear panel of the modem. Refer to Table 5-2 for pin assignments.

Table 5-2. BNC Connectors

BNC Connector Reference Description Direction

RX-IF J1 RX-IF signals In TX-IF J2 TX-IF signals Out EXT REF J9 External Baseband Input In IDI J10A Insert Data Input In DDO J11A Drop Data Output Out RX (IDO) J10B RX G.703 (Unbalanced) Out TX (IDI) J11B TX G.703 (Unbalanced) In

5.3 Overhead Interface Connector (P3A)

The overhead interface connector is a 25-pin male D interface located on the rear panel of the modem. Refer to Table 5-3 for pin assignments.

Table 5-3. Overhead Interface Connector Pin Assignments

Pin # Signal Function Signal Name Direction

14 IDR 64 kbps ESC Tx Data + TX-422DAT-B In 2 IDR 64 kbps ESC Tx Data - TX-422DAT-A In 12 IDR 64 kHz ESC Tx Clock + TX-422CLK-B Out 15 IDR 64 kHz ESC Tx Clock - TX-422CLK-A Out 11 IDR 1 kHz Tx Octet Clock + TX-OCT-B Out 24 IDR 1 kHz Tx Octet Clock - TX-OCT-A Out 16 IDR 64 kbps ESC Rx Data + RX-422DAT-B Out 3 IDR 64 kbps ESC Rx Data - RX-422DAT-A Out 9 IDR 64 kHz ESC Rx Clock + RX-422CLK-B Out 17 IDR 64 kHz ESC Rx Clock - RX-422CLK-A Out 19 IDR 1 kHz Rx Octet Clock + RX-OCT-B Out 4 IDR 1 kHz Rx Octet Clock - RX-OCT-A Out 20 Balanced Ext.Baseband Clock + EXT-CLK-B In 23 Balanced Ext.Baseband Clock - EXT-CLK-A In 13 IBS/D&I ESC RS232 Tx Data TX-232-DATA In 22 IBS/D&I ESC RS232 Tx Clock TX-232-CLK Out 8 IBS/D&I ESC RS232 Rx Data RX-232-DATA Out 10 IBS/D&I ESC RS232 Rx Clock RX-232-CLK Out 5 IBS Tx High-Rate ESC Data TX-ASYNC In 6 IBS Rx High-Rate ESC Data RX-ASYNC Out 1 IDR Back Alarm 1 H/W input BW-IN1 In 18 IDR Back Alarm 2 H/W input BW-IN2 In 21 IDR Back Alarm 3 H/W input BW-IN3 In 25 IDR Back Alarm 4 H/W input BW-IN4 In 7 Signal Ground Ground -

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CDM-600 Satellite Modem Revision 7 Connector Pinouts MN/CDM600.IOM

5.4 Data Interface Connector (P3B)

The Data Interface connector, a 25-pin D type female, conducts data input and output signals to and from the modem, and connects to customer’s terrestrial equipment, breakout panel, or protection switch. Refer to Table 5-4 for pin assignments.

Table 5-4. Data Interface Connector Pin Assignments

Pin #

2 Transmit Data A DTE to Modem SD A SD A BA 103

14 Transmit Data B DTE to Modem SD B SD B - 103

24 Transmit Clock A DTE to Modem TT A SCTE A DA 113

11 Transmit Clock B DTE to Modem TT B SCTE B - 113

15 Internal Transmit

12 Internal Transmit

3 Receive Data A Modem to DTE RD A RD A BB 104

16 Receive Data B Modem to DTE RD B RD B - 104

17 Receive Clock A Modem to DTE RT A SCR A DD 115

9 Receive Clock B Modem to DTE RT B SCR B - 115

8 Receiver Ready A Modem to DTE RR A RLSD * CF 109

10 Receiver Ready B Modem to DTE RR B - - 109

23 External Carrier Off

7 Signal Ground - SG SG AB 102

Generic Signal description

Clock A

Clock B

(EIA-232 ‘1' or TTL ‘low’ )

Direction

Modem to DTE ST A SCT A DB 114

Modem to DTE ST B SCT B - 114

DTE to Modem - - - -

EIA-422 EIA 530 LVDS

V.35 EIA-232 Circuit #

1 Shield - Shield FG AN 101

Notes:

1. Receiver Ready is an EIA-232 -level control signal on a V.35 interface.

2. DO NOT connect signals to pins which are not shown - these pins are reserved for use by the redundancy system.

3. ‘B’ signal lines are not used for EIA-232 applications.

4. For X.21 operation, use the EIA-422 pins, but ignore Receive Clock if the Modem is DTE, and ignore Transmit clocks if the Modem is DCE.

5. For IDR operation using G.703, this primary interface becomes the 8 kbps EIA-422 overhead channel.

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5.5 Audio Interface Connector (P4A)

The Audio interface connection is a 9-pin female D connector located on the rear panel of the modem. Refer to Table 5-5 for pin assignments.

Table 5-5. Audio Interface Connector Pin Assignments

Pin # Signal Function Direction 1 Tx Audio 1 + In 6 Tx Audio 1 - In 2 Rx Audio 1 + Out 7 Rx Audio 1 - Out 8 Tx Audio 2 + In 4 Tx Audio 2 - In 9 Rx Audio 2 + Out 5 Rx Audio 2 - Out 3 Common

5.6 Remote Control Interface Connector (P4B)

The remote control interface connection is a 9-pin male connector located on the rear panel of the modem. Refer to Table 5-6 for pin assignments.The remote control port is intended for connection to an M&C computer, or terminal device. This interface is user selectable for either EIA-232 or EIA-485.

Table 5-6. Remote Control Interface Connector Pin Assignments

Pin #

1 Ground 2 EIA-232 Transmit Data Out 3 EIA-232 Receive Data In 4 Reserved - do not connect to this pin 5 Ground 6 EIA-485 Receive Data B * In 7 EIA-485 Receive Data A * In 8 EIA-485 Transmit Data B Out 9 EIA-485 Transmit Data A Out

Description Direction

* Use for 2-wire EIA-485 operation

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CDM-600 Satellite Modem Revision 7 Connector Pinouts MN/CDM600.IOM

5.7 IDR Backward Alarms Connector (P5A)

The IDR Alarm interface connection is a 15-pin female connector located on the rear panel of the modem. Refer to Table 5-7 for pin assignments.

Table 5-7. IDR Alarm Interface Connector Pin Assignments

Pin # Signal Function Name

2 9 1 10 TBD MON-A 4 11 3 6 13 5 14 TBD MON-B 8 15 7 12 Ground GND

Backward Alarm 1 is active

Backward Alarm 1 is not active

Backward Alarm 2 is active

Backward Alarm 2 is not active Backward Alarm 3 is active

Backward Alarm 3 is not active

Backward Alarm 4 is active

Backward Alarm 4 is not active

5.8 Unit Alarms (P5B)

Unit alarms are provided on a 15-pin male connector located on the rear panel of the modem. Refer to Table 5-8 for pin assignments.

Table 5-8. Alarm Interface Connector Pin Assignments

Pin # Signal Function Name

8 15 7 14 6 13 5 12 4 11 3 10 No Connection N/C 2 AGC Voltage (Rx signal level, 0 to 2.5 volts) AGC 9 EXT Carrier OFF EXT-OFF 1 Ground GND

Rx Traffic (De-energized, Faulted) Rx Traffic (Energized, No Fault) RX Traffic Tx Traffic (De-energized, Faulted) Tx Traffic (Energized, No Fault) Tx Traffic Unit Fault (De-energized, Faulted) Unit Fault (Energized, No Fault) Unit Fault RX I Channel (Constellation monitor) RX Q Channel (Constellation monitor)

BA-1-NO BA-1-COM BA-1-NC

BA-2-NO BA-2-COM BA-2-NC BA-3-NO BA-3-COM BA-3-NC

BA-4-NO BA-4-COM BA-4-NC

RX-NC RX-NO RX-COM TX-NC TX-NO TX-COM UNIT-NC UNIT-NO UNIT-COM RX-I RX-Q

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5.9 Auxiliary Serial Connector (P6)

Provides an RS-232 serial link between the modem and the CRS-150 1:1 Redundancy Switch.

Table 5-9. Auxiliary Serial Connector (USB Type B Socket)

Pin # Description Direction 1,4 Ground 2 EIA-232 Transmit Data Out 3 EIA-232 Receive Data In

Although this port uses a USB connector, the signals are not USB compatible. Do NOT connect this port to the USB port of a PC, or

WARN ING

other computing device.

5.10 Balanced G.703 Interface Connector (P7)

The Balanced G.703 connection is a 15-pin female connector located on the rear panel of the modem. Refer to Table 5-10 for pin assignments.

Table 5-10. Balanced G.703 Interface Connector Pin Assignments

Pin # Signal Function Name Direction

1* Drop Data Input ( - ) DDI– In 9* Drop Data Input (+) DDI+ In 2 Ground GND 10 Not Used 3* Insert Data Output ( - ) IDO– Out 11* Insert Data Output (+) IDO+ Out 4 Ground GND 12 Drop Data Output ( - ) DDO– Out 5 Drop Data Output (+) DDO+ Out 13 Insert Data Input ( - ) IDI– In 6 Insert Data Input (+) IDI+ In 14 Not Used 7 Not Used 15 Not Used 8 Not Used

* Use for all non-Drop and Insert and T2/E2 balanced applications.

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5.11 AC Power Connector

A standard, detachable, non-locking, 3-prong power cord (IEC plug) supplies the Alternating Current (AC) power to the modem. Note the following:

AC Power Specifications

Input Power 40W maximum, 30W typical Input Voltage 100 - 240 volts AC, +6%/-10% - autosensing

(total absolute max. range is 90 - 254 volts AC) Connector Type IEC Fuse Protection 1.25A Slow-blow (115 volt AC operation)

0.75A Slow-blow (230 volt AC operation)

Line and neutral fusing

20 mm type fuses

5.12 Ground Connector

A #10-32 stud on the rear panel of the modem is used for connecting a common chassis ground among equipment.

Note: The AC power connector provides the safety ground.

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Chapter 6. FRONT PANEL

6.1 Description

The user can fully control and monitor the operation of the CDM-600 from the front panel, using the keypad and display. Nested menus are used, which display all available options, and prompt the user to carry out a required action.

The display has two lines each of 40 characters. On most menu screens, the user will observe a flashing solid block cursor, which blinks at a once-per-second rate. This indicates the currently selected item, digit, or field. Where this solid block cursor would obscure the item being edited (for example, a numeric field) the cursor will automatically change to an underline cursor.

If the user were to display the same screen for weeks at a time, the display could become ‘burnt’ with this image. To prevent this, the unit has a ‘screen saver’ feature that will activate after 1 hour. The top line of the display will show the Circuit ID (which can be entered by the user) and the bottom line will show the circuit Eb/No value (if the demod

is locked) followed by ‘Press any key....’. The message moves from right to left across

the screen, then wraps around. Pressing any key will restore the previous screen.

OPERATION

Figure 6-1. Front Panel View

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The behavior of the front panel LEDs is described below in Table 6-1.

Table 6-1. Front Panel LED Indicators

LED Color Condition

Unit Status

Traffic

On line

Stored Event

Remote

EDMAC Mode

Test Mode

Red A Unit Fault exists (Example: PSU fault) Orange No Unit Faults, but a Traffic Fault exists Green No Unit Faults, or Traffic Faults Green No Tx Traffic Faults Transmit Off A Tx Traffic fault exists OR the Tx Carrier is in OFF state Green No Rx Traffic Faults (demod and Viterbi decoder are locked, everything is OK) Receive Off An Rx Traffic fault exists (the demod may still be OK) Green The Unit is On Line, and carrying traffic

Off

Orange

Off There are no Stored Events Orange The Unit is in Remote Mode - local monitoring is possible, but no local control Off The Unit is in Local Mode - remote monitoring is possible, but no remote control

Flashing

Orange

Off Either no EDMAC, EDMAC Master, or Transparent mode is selected Orange A Test Mode is selected (Example: IF Loopback) Off There is no Test Mode currently selected

The Unit is Off Line (standby) - forced by externally connected 1:1 or 1:N redundancy system

There is a Stored Event in the log, which can be viewed from the front panel, or retrieved via the remote control interface

ODU control has been enabled, and there is a communications fault, or there is a ODU status fault

Framing on, EDMAC on, and unit defined as Slave - local monitoring is possible, but no local control

IMPORTANT

In general, the Alarm relay state will reflect the state of the Front Panel LEDs. For instance, if the Unit Status LED is red, the Unit Alarm relay will be active, etc. The one exception is the Transmit Traffic relay. This will only be activated if a Transmit Traffic Fault exists – it does not reflect the state of the TX carrier.

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The keypad is shown in Figure 6-2:

Figure 6-2. Keypad

The function of these keys is as follows:

ENTER CLEAR

Left, Right [←], [→] Up, Down [↑], [↓]

This key is used to select a displayed function or to execute a modem configuration change. This key is used to back out of a selection or to cancel a configuration change which has not

been executed using [ENTER]. Pressing [CLEAR] generally returns the display to the previous selection.

These arrows are used to move to the next selection or to move the cursor functions. At times, they may also used to move from one section to another.

These arrows are used primarily to change configuration data (numbers). At times, they may also be used to move from one section to another.

The keypad has an auto-repeat feature. If a key is held down for more than 1 second, the key action will repeat, automatically, at the rate of 15 keystrokes per second. This is particularly useful when editing numeric fields, with many digits, such as

IMPORTANT

frequency or data rate.

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SELECT

CONFIGURE TEST INFORMATION MONITOR STORE/LOAD UTILITY ODU FAST

CONFIGURE

CONFIGURE ALL CONFIGURE MODE CONFIGURE TRANSMIT CONFIGURE RECEIVE CONFIGURE CLOCKS DROP AND INSERT EDMAC MISC REMOTE MASKS IMPEDANCE STATISTICS

TEST

NORMAL TRANSMIT CW TRANSMIT ALT 1,0 IF LOOPBACK DIGITAL LOOPBACK I/O LOOPBACK RF LOOPBACK

INFORMATION

ALL CIRCUIT ID FORMAT TRANSMIT RECEIVE CLOCKS EDMAC DROP INSERT REMOTE ALARM MASK MISCELLANEOUS

MONITOR

LIVE ALARMS STORED EVENTS STATISTICS AUPC PARAMS RX PARAMETERS

STORE/LOAD

STORE LOAD

UTILITY

REAL-TIME CLOCK BRIGHTNESS LAMP TEST MANUAL 1:1 SWITCH EDIT CIRCUIT ID

ODU

(SEE SEPARATE USER'S GUIDE)

FAST

VIEW/UPGRADE OPTIONS

CONFIGURE ALL

(COMPLETE CONFIGURATION)

CONFIGURE MODE

TX MODE AND INTERFACE RX MODE AND INTERFACE

CONFIGURE TRANSMIT

TRANSMIT IF POWER ENCODER

MODULATION DATA SCRAMBLER

CONFIGURE RECEIVE

RECEIVE IF DECODER DEMOD DATA DESCRAMBLER Eb/No ALARM THRESHOLD

CONFIGURE CLOCKS

TRANSMIT CLOCK RECEIVE CLOCK/BUFFER EXTERNAL REFERENCE

CONFIGURE DROP AND INSERT

DROP TYPE, CHANNELS/TIMESLOTS INSERT TYPE, CHANNELS/TIMESLOTS LOOP

EDMAC

EDMAC MODE EDMAC ADDRESS

MISC

ADPCM AUDIO VOLUME IDR ESC TYPE G.703 LINE CODE

REMOTE CONTROL

LOCAL REMOTE

MASK

AIS BUFFER RX IF SATELLITE ALARM TERRESTRIAL ALARM

IMPEDANCE

50/75 Ω

STATISTICS

LOGGING INTERVAL

LIVE ALARMS UNIT, RECEIVE, TRANSMIT, NETWORK

STORED EVENTS STATISTICS

AUPC PARAMETERS REMOTE Eb/No, TX PWR INCREASE

RX PARAMETERS

RX PARAMETERS: Eb/No=12.6dB dF=+11.7kHz BER=1.2E-4 BUFFER=54% RX-LEVEL=-55dBm

VIEW, CLEAR ALL

DATA RATE, DATA SENSE INVERT

FREQ, ON/OFF, TSI

MANUAL

AUPC

DATA RATE, DATA SENSE INVERT

FREQ, ACQ SWEEP, RSI REED-SOLOMON TYPE

DEMOD TYPE, FEC RATE

BAUD RATE INTERFACE ADDRESS

AUPC OPTIONS

REED-SOLOMON TYPE

MOD TYPE, FEC RATE

Figure 6-3. Menu Trees

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6.2 Opening Screen

This screen is displayed whenever power is first applied to the unit:

COMTECH CDM-600 OPEN NETWORK MODEM TURBO: TPC/LDPC S/W VER 2.0.1

For units manufacured after February 2005 with the extended IF bandwidth feature:

COMTECH CDM-600(E) OPEN NETWORK MODEM TURBO: TPC/LDPC S/W VER 2.0.1

Press any key to go to the Main Menu screen. (Note: a REF WARMING message may be seen at this point - see Section 6.3.1.8.)

6.3 Main Menu

SELECT: CONFIGURATION TEST INFORMATION MONITOR STORE/LOAD UTILITY ODU FAST

The following choices are presented:

CONFIGURATION

TEST

INFORMATION

MONITOR

STORE/LOAD

UTILITY

ODU (Outdoor Unit) FAST (Fully Accessible System

Topology)

Permits the user to fully configure the modem.

Permits the user to configure the modem into one of several Test modes.

Permits the user to view information on the modem, without having to go into the Configuration screens.

Permits the user to monitor the current status of the modem and view the log of stored events for the modem.

Permits the user to store and retrieve up to 10 different modem configurations.

Permits the user to perform miscellaneous functions, such as setting the Real-Time Clock, adjusting the display brightness, etc.

Permits the user to monitor and control a Comtech EF Data RF Transceiver, if connected.

Permits the user to configure different options, for extended data rates, interfaces, etc. Contact the factory for details.

The actual choices displayed in the sub-menus may vary according to which FAST options have been enabled. Where a FAST option

IMPORTANT

6–5

affects a menu, this is shown in the descriptive text.

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6.3.1 CONFIG

CONFIG: ALL MODE TX RX CLOCKS D&I EDMAC MISC REMOTE MASK IMPED STATS

The sub-branches available are:

ALL

MODE TX (Transmit)

RX (Receive)

CLOCKS

D&I EDMAC MISC REMOTE (Remote Control)

MASK IMPED (Impedance) STATS (Statistics)

Permits the user to completely configure the unit, being prompted, step

by step, to make choices, or edit data. This is highly recommended for

new users, as it will clearly lead the user through all the configuration

parameters.

Permits the user to select Frame Type and Data Format for TX and RX.

Permits the user to define, on a parameter-by-parameter basis, the TX

configuration of the unit. These menu sub-branches would be used if the

user wished to change, for example, just the TX Frequency.

Permits the user to define, on a parameter-by-parameter basis, the RX

configuration of the unit. These menu sub-branches would be used if the

user wished to change, for example, just the RX data rate.

Permits the user to select TX-Clocking, RX-Buffer/Clock, or External

Reference.

Permits the user to select Drop or Insert options.

Permits the user to select EDMAC options.

Permits the user to select, view, or change various other parameters.

Permits the user to define whether the unit is being controlled locally, or

remotely, and to configure the Remote Control parameters: baud rate,

I/O format, address.

Permits the user to activate or MASK an alarm condition.

Permits the user to select the impedance at the IF connectors,

either 50 or 75 Ω.

Permits the user to enable and configure the logging of various statistics,

including Eb/No and AUPC parameters

The modem may be monitored over the remote control bus at any time. When in Local mode, however, configuration parameters may only be changed through the front panel. Conversely, when in Remote mode, the unit may be monitored from the front panel, but

IMPORTANT

configuration parameters may only be changed via the remote control bus.

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6.3.1.1 CONFIG: ALL

ALL = START

(STOP, START)

This menu permits the user to configure the unit, in a step-by-step process by viewing each menu in succession. Use the [←] [→] [↑] and [↓] arrow keys to select and edit the various parameters. Press ENTER to continue through all the configuration. Press CLEAR to discontinue.

6.3.1.2 CONFIG: MODE

The MODE is a key parameter when configuring the modem. To simplify the menu choices, the user must first determine the INTERFACE and FRAMING type for both

IMPORTANT

Transmit and Receive. Once these have been selected, the user is only presented with menu choices that are applicable to those particular modes.

Examples:

• If a G.703 interface is selected, the data rate menu will be restricted to only

the appropriate G.703 rates.

• If an IDR framing mode is selected, the data rate choices will be limited to

only those rates specified by IESS-308.

MODE: TX=RS422:NONE RX=RS422:NONE (NONE,IBS,IDR,INSERT,EDMAC,D&I++,ESC++)

Select TX and RX interface type and framing of the unit, using the [←] [→] [↑] [↓] arrow keys, then press ENTER.

The first parameter is the Interface type. The options are:

• RS422

• V.35

• RS232

• G703B (balanced)

• G703U (unbalanced)

• Audio (FAST option)

• LVDS

The AUDIO choice permits the user to carry 2 x 32 kbps ADPCM audio as the primary data. This mode forces IBS or EDMAC as the available framing types.

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The second option is the Framing type.

The TX options are:

NONE IBS (FAST option) IDR (FAST option) DROP (FAST option) EDMAC D&I++ (FAST option) (Ver 1.5.0 or greater) ESC++ (Ver 2.0.1 or greater)

The RX options are:

NONE IBS (FAST option) IDR (FAST option) INSERT (FAST option) EDMAC D&I++ (FAST option) (Ver 1.5.0 or greater) ESC++ (Ver 2.0.1 or greater)

6.3.1.3 CONFIG: TX

TX-IF: POWER ENCODER MOD DATA SCRAMBLER DATA=20000.000kbps SYMBOL=10000.000ksym

Select the parameters on the top line to be edited using the [←] [→] arrow keys. Observe the Data/Symbol rates on the bottom line. Press ENTER

CONFIG: TX: TX-IF

TX-IF: CARRIER = ON (ON,OFF,RTI) TX FREQ=176.0000MHz SPECTRUM

Three TX settings can be set from this menu. Select the parameter to edit using the [←] [→] arrow keys. The options for the TX carrier are shown in parentheses. To change the settings use the [↑] [↓] arrow keys. Select either ON, OFF, or RTI, then press ENTER.

IMPORTANT

RTI means RECEIVE/TRANSMIT INHIBIT. When selected, it will prevent the TX carrier from being transmitted, until the demodulator is locked. To avoid the Tx Carrier from being turned off when the demodulator loses lock for a very short period of time, the demodulator must be unlocked continuously for a period of 10 seconds before the transmit carrier is inhibited. This time interval is fixed and the user cannot change it. Having this feature enabled does not affect the internal IF loopback feature. But, be aware that if an external IF loopback is attempted (connecting an external cable from the Tx IF output to the Rx IF input), then this will not work! (The Tx carrier cannot turn on until the demod is locked, and the demod cannot lock, because the TX output is off. The net result is that the demod will not lock, and the Tx carrier will not turn on. USE THE RTI FEATURE WITH EXTREME CARE!

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Select each digit of the TX frequency to be edited using the [←] [→] arrow keys. Edit the value of the digit using the [↑] [↓] arrow keys. When editing is complete, press ENTER. Note that the range is from 52 to 88 MHz, and 104 to 176 MHz. The resolution is 100Hz.

For units manufacured after February 2005, and which display CDM-600(E) on the opening menu, the range of IF frequencies has been extended to 50 - 90 MHz, and 100 180 MHz.

SPECTRUM INVERT should normally be in the OFF position. When in the ON position, for all FEC types, except BPSK, the transmit spectrum

IMPORTANT

is inverted (which is the same as reversing the direction of phase rotation in the modulator). In BPSK, the time-order of bits out of the FEC encoder is reversed, to make the modem compatible with certain other manufacturer’s modems.

CONFIG: TX: POWER

OUTPUT POWER: MODE = MANUAL (MANUAL,AUPC) OUTPUT POWER LEVEL = –20.0 dBm

Select the parameter to edit using the [←] [→] arrow keys. Edit the output level mode, either MANUAL or AUPC, using the [↑] [↓] arrow keys. Select each digit of the TX Power Level using the [←] [→] arrow keys. Edit the value of the digit using the [↑] [↓] arrow keys. When editing is complete, press ENTER.

If AUPC mode is selected, the lower line changes:

(Note that EDMAC, or D&I++, or ESC++ framing must be enabled for AUPC to function.)

OUTPUT POWER: MODE = AUPC (MANUAL,AUPC) TARGET-EbNo/RANGE ALARM/ACTIO

Use the [←] [→] arrow keys to select either TARGET-EbNo/RANGE or ALARM ACTION, then press ENTER

If TARGET-EbNo/RANGE is selected, the following menu will be displayed:

MINIMUM EbNo OF REMOTE MODEM = 5.0dB MAXIMUM PERMITTED POWER INCREASE = 9dB

Edit the target Eb/No of the remote modem. The default value is 3.0 dB, and upper limit is 9.9 dB. Edit the maximum permitted increase in power level when in AUPC mode. The default value is 1dB, and upper limit is 9 dB. The user should then press ENTER.

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If ALARM ACTION is selected, the following menu will be displayed:

MAX TX PWR ACTION = NONE (NONE, TX-ALM) REM DEMOD UNLOCK ACT = NOM-PWR(NOM, MAX)

Select the action that will occur if the AUPC causes the maximum output power level to be reached, either NONE or TX ALARM.

Select the action that will occur if the remote demod is unlocked. The choices are: NOM- PWR (Nominal Power), where the output level will revert to the nominal power level set under MANUAL or MAX-PWR, (Maximum Power), where the output level will change to the maximum permitted. The user should then press ENTER.

CONFIG: TX: ENCODER

ENCODER = TPC (NONE,VIT,SEQ,TCM,TPC,LDPC) REED-SOLOMON= OFF (ON,OFF)

Select the parameter to edit using the [←] [→] arrow keys. The Encoder options are shown in the parentheses. Select using the [↑] [↓] arrow keys,

then press ENTER. The choices are:

• Viterbi

• Sequential

• Trellis Coded Modulation - 8-PSK Rate 2/3 only (FAST option)

• TPC (Turbo) (Hardware option)

• None (uncoded)

• LDPC (Hardware option) Note: This option of encoding is only displayed if

the TPC/LDPC Codec is installed.

Select ON or OFF for Reed-Solomon using the [↑] [↓] arrow keys, then press ENTER. If Reed-Solomon is ON, proceed to the next menu.

If None is selected, the bottom line of the display will change from the R-S selection to the Differential Encoding selection, as shown below:

ENCODER = NONE (NONE,VIT,SEQ,TCM,TPC,LDPC) DIFF-ENCODER= OFF (ON, OFF)

If the user selects Differential Encoding=OFF, there is no way for the modem to resolve the phase ambiguities associated with PSK

IMPORTANT

modulations. For BPSK there is a 1 in 2 chance that the polarity of the data will be correct. IN QPSK there is a 1 in 4 chance the data will be correct.

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CONFIG: TX: ENCODER: REED-SOLOMON ON

REED-SOLOMON ENCODING = ON(200/180)

Use the [↑] [↓] arrow keys to select one of the listed parameters, and press ENTER. Selections depend on the Framing mode. Possible selections include:

• IESS-310 (219/201), open or closed network

• IBS (126/112), open or closed network

• EDMAC (200/180), closed network

• IDR (225/205), open network

• IDR (194/178), open network

• UNFRAMED (220/200), closed network

• LEGACY EF DATA (225, 205 with V.356 scrambling), closed network

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CONFIG: TX: MODULATION

MODULATION= QPSK (B,Q,OQ-PSK) FEC RATE = 1/2 (1/2,3/4,7/8)

Select one of the parameters using the [←] [→] arrow keys, and then edit using the [↑] [↓] arrow keys. Edit the Modulation type and the FEC rate.

The Encoder type dictates the Modulation Type and FEC rate choices:

No Encoder:

Non-Turbo Encoder:

Turbo (with the 5 Mbps Codec Installed):

Turbo (with the 20 Mbps Codec Installed, or the TPC/LDPC Codec installed):

LDPC (with TPC/LDPC Codec installed):

The following window will appear if the TPC/LDPC Codec is installed:

MODULATION= QPSK (B,Q OQ,8PSK,16Q,8QAM) FEC RATE = 1/2 (1/2,3/4,7/8)

BPSK Fixed at 1/1 QPSK, OQPSK Fixed at 1/1

BPSK fixed at Rate 1/2 TCM 8-PSK fixed at Rate 2/3 (FAST option) QPSK, OQPSK 1/2, 3/4 or 7/8 16-QAM 3/4 or 7/8 (Viterbi + Reed-Solomon only)

BPSK 5/16 or 21/44 QPSK, OQPSK, fixed at 3/4 8-PSK, 16-QAM fixed at 3/4 (FAST option)

BPSK 5/16 or 21/44 QPSK, OQPSK, 1/2, 3/4, 7/8 or 0.95 8-PSK 3/4, 7/8 , and 0.95 (FAST option) 16-QAM 3/4 and 7/8 (FAST option)

BPSK 1/2 QPSK, OQPSK, 1/2, 2/3, 3/4 8-PSK, 8-QAM 2/3, 3/4 (FAST Option) 16-QAM 3/4 (FAST option)

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CONFIG: TX: DATA

TX DATA RATE = 01544.000 kbps DATA INVERT = OFF (ON,OFF)

The top line permits the data rate to be edited. Select the digit of Transmit Data Rate to be edited using the [←] [→] arrow keys. The value of the digit is changed using the [↑] [↓] arrow keys. Press ENTER.

NOTE: The minimum and maximum data rates are dependent on Modulation type and FEC encoder Rate. If the user changes the Modulation or FEC, and the data rate becomes invalid, the Data Rate will be adjusted automatically. The upper range of data rate will be dictated by the FAST option installed.

When Drop Framing or the G.703 interface type is used the [↑] [↓] arrow keys will scroll through the available data rates. If in Drop Mode and the data rate is edited to 1920 kbps, a comment is shown to indicate that E1 fixed channel mode will be implemented.

When G.703 is used and the Modem is Hardware Revision 2.0 or higher, three auxiliary rates will also be available (512, 1024 and 2048 kbps) indicated by the word AUX appearing to the right of the decimal place. (For example, 00512.AUX kbps). Refer to Section 4.3 IDI/DDO connectors for information on how to connect the cables for the AUX data rates.

The bottom line permits the user to select the data inversion feature (added for compatibility with certain older equipment). Select either ON or OFF, using the [↑] [↓] arrow keys, then press ENTER.

CONFIG: TX: SCRAMBLER

6–13

TX SCRAMBLER = ON (ON,OFF) FRAME SCRAMBLER

Select either ON or OFF, using the [↑] [↓] arrow keys, then press ENTER.

The choice of scrambler is selected automatically, and will be depend on the exact operating mode. For example, if no framing is being used, the ITU V.35 scrambler (Intelsat variant) will be used. If IBS framing is selected, the IESS-309 scrambler will be used, etc. If Turbo encoding is used a second scrambler selection is available: IESS-315 V.35 instead of the TPC scrambler.

TX SCRAMBLER = IESS (NORMAL,IESS,OFF) IESS-315 V.35 SCRAMBLER

If LDPC encoding is selected the standard ITU V.35 scrambler will be used.

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6.3.1.4 CONFIG: RX

RX-IF DECODER DEMOD DATA DESCRAM EbNo DATA=00064.000kbps SYMBOL=00037.333ksym

The sub-branches available are:

CONFIG: RX: RX-IF

ACQUISITION SWEEP RANGE = +/- 32 kHz RX FREQ=070.0000 MHz SPECTRUM INVERT=OFF

Edit the Acquisition Sweep Range of the demodulator. The value of the digit is changed using the [↑] [↓] arrow keys. Press ENTER.

The value entered determines the amount of frequency uncertainty the demodulator will sweep over in order to find and lock to an incoming carrier. When operating at low bit rates, large values of sweep range (compared to the data rate) will cause excessively long acquisition times. For example: selecting ± 32 kHz with a data rate of 2.4 kbps, BPSK, will result in an average acquisition time of around 3 minutes.

Edit the Receive Frequency (RX FREQ) of the demodulator. Select the digit to be edited using the [←] [→] arrow keys. The value of the digit is changed using the [↑] [↓] arrow keys. Press ENTER. Note that the range is from 52 to 88 MHz, and 104 to 176 MHz. The resolution is 100Hz.

For units manufacured after February 2005, and which display CDM-600(E)on the opening menu, the range of IF frequencies has been extended to 50 - 90 MHz, and 100 180 MHz.

SPECTRUM INVERT should normally be in the OFF position. When in the ON position, the receive spectrum is inverted (which is the same as

IMPORTANT

reversing the direction of phase rotation in the demodulator). Note that in BPSK mode, the demodulator will automatically synchronize to either the normal time-ordering of bits FEC codeword pairs, or the inverted ordering used by certain other manufacturers.

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CONFIG: RX: DECODER

DECODER = VIT NONE,VIT,SEQ,TCM,TPC,LDPC) REED-SOLOMON = OFF (ON,OFF)

Select the parameter to edit using the [←] [→] arrow keys.

The Decoder options are shown in the parentheses. Select using the [↑] [↓] arrow keys, then press ENTER. The choices are:

• Viterbi

• Sequential

• Trellis Coded Modulation - 8-PSK Rate 2/3 only (FAST option)

• TPC (Turbo) (Hardware option)

• None (uncoded)

• LDPC (Hardware option) Note: This option of decoding is only displayed if

the TPC/LDPC Codec is installed.

Select ON or OFF for Reed-Solomon using the [↑] [↓] arrow keys, then press ENTER. If Reed-Solomon is ON, proceed to the next menu.

If NONE is selected, the bottom line of the display will change from the RS selection to the Differential Encoding selection, as shown below:

DECODER = NONE (NONE,VIT,SEQ,TCM,TPC,LDPC) DIFF-DECODER= OFF (ON,OFF)

If the user selects Differential Decoding = OFF, there is no way for the modem to resolve the phase ambiguities associated with PSK

IMPORTANT

modulations. For BPSK there is a 1 in 2 chance that the polarity of the data will be correct. In QPSK there is a 1 in 4 chance that the data will be correct.

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CONFIG: RX: DECODER: REED-SOLOMON ON

REED-SOLOMON DECODING = ON(200/180)

Use the [↑] [↓] arrow keys to select one of the listed parameters, and press ENTER. Selections depend on the Framing mode. Possible selections include:

• IESS-310 (219/201), open or closed network

• IBS (126/112), open or closed network

• EDMAC (200/180), closed network

• IDR (225/205), open network

• IDR (194/178), open network

• UNFRAMED (220/200), closed network

• LEGACY EF DATA (225,205, with V.35 scrambling), closed network

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CONFIG: RX: DEMODULATION

DEMODULATION = QPSK(B,Q,OQ,8PSK,16QAM) FEC RATE = 1/2 (1/2,3/4,7/8)

Select one of the parameters using the [←] [→] arrow keys, and then edit using the [↑] [↓] arrow keys. Edit the Demodulation type and the FEC rate.

The Decoder type dictates the FEC Rate choices:

No Encoder:

Non-Turbo Encoder:

Turbo (with the 5 Mbps Codec Installed):

Turbo (with the 20 Mbps Codec Installed, or the TPC/LDPC Codec installed):

LDPC (with TPC/LDPC Codec installed):

The following window will appear if the TPC/LDPC Codec is installed:

DEMODULATION= QPSK (B,Q OQ,8PSK,16Q,8QAM) FEC RATE = 1/2 (1/2,3/4,7/8)

BPSK Fixed at 1/1 QPSK, OQPSK Fixed at 1/1

BPSK fixed at Rate 1/2 TCM 8-PSK fixed at Rate 2/3 (FAST option) QPSK, OQPSK 1/2, 3/4 or 7/8 16-QAM 3/4 or 7/8

BPSK 5/16 or 21/44 QPSK, OQPSK, fixed at 3/4 8-PSK, 16-QAM fixed at 3/4 (FAST option)

BPSK 5/16 or 21/44 QPSK, OQPSK, 1/2, 3/4, 7/8 or 0.95 8-PSK 3/4, 7/8 , and 0.95 (FAST option) 16-QAM 3/4 and 7/8 (FAST option)

BPSK 1/2 QPSK, OQPSK, 1/2, 2/3, 3/4 8-PSK, 8-QAM 2/3, 3/4 (FAST Option) 16-QAM 3/4 (FAST option)

CONFIG: RX: DATA

RECEIVE DATA RATE = 00064.000 kbps DATA INVERT = OFF (ON,OFF)

The top line permits the data rate to be edited Select the digit of the Receive Data Rate using the [←] [→] arrow keys. Edit the value of the digit using the [↑] [↓] arrow keys. Press ENTER.

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NOTE: The minimum and maximum data rates are dependent on Demodulation type and FEC decoder Rate. If the user changes the Modulation or FEC, and the data rate becomes invalid, the Data Rate will be adjusted automatically. The upper range of data rate will be dictated by the FAST option installed.

When Insert Framing or the G.703 interface type is used the [↑] [↓]arrow keys will scroll through the available data rates. If in Drop Mode and the data rate is edited to 1920 kbps, a comment is shown to indicate that E1 fixed channel mode will be implemented. The bottom line permits the user to select the data inversion feature (added for compatibility with certain older equipment). Select either ON or OFF, using the [↑] [↓] arrow keys, then press ENTER.

When G.703 is used and the Modem is Hardware Revision 2.0 or higher, three auxiliary rates will also be available (512, 1024, and 2048 kbps) indicated by the word AUX appearing to the right of the decimal place. (For example, 00512.AUX kbps).

Refer to Section 4.3 IDI/DDO connectors for additional information about how to connect the cables for the new AUX data rates.

The bottom line permits the user to select the data inversion feature (added for compatibility with certail older equipment). Select either ON or OFF, using the [↑ ] [↓] arrow keys, then press ENTER.

CONFIG: RX: DESCRAMBLER

RX DESCRAMBLER = ON (ON,OFF)

FRAME DESCRAMBLER

Select either ON or OFF, using the [↑] [↓] arrow keys, then press ENTER.

The choice of descrambler is selected automatically, and will be depend on the exact operating mode. For example, if no framing is being used, the ITU V.35 descrambler (Intelsat variant) will be used. If IBS framing is selected, the IESS-309 descrambler will be used.

If Turbo decoding is used a second scrambler selection is available: IESS-315 V.35 instead of the TPC scrambler.

RX DESCRAMBLER = IESS (NORMAL,IESS,OFF) IESS-315 V.35 DESCRAMBLER

If LDPC decoding is selected the standard ITU V.35 descrambler will be used.

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CONFIG: RX: EbNo

RECEIVE EbNo ALARM POINT = 02.0 dB

Select the digit of the Alarm point to be edited using the [←] [→] arrow keys. Edit the value of the digit using the [↑] [↓] arrow keys. Press ENTER.

The range of values is from 00.1 to 16.0 dB. The user may select a value here, and if the Eb/No falls below this value, a receive traffic fault will be generated.

6.3.1.5 CONFIG: CLOCKS

CLOCKING: TX-CLOCK RX-BUFFER/CLOCK EXT-BASEBAND-CLK EXT-FREQ-REF INT-REF

The sub-branches available are:

CONFIG: CLOCKS: TX CLOCK

TRANSMIT CLOCK = INTERNAL(SCT) (INT(SCT),TX-TERR(TT),RX-LOOP,EXT-CLK)

Use the [↑] [↓] arrow keys to select from the choices shown in parentheses, then press ENTER.

INTERNAL (SCT) Indicates that the unit will supply a clock to the DTE, which is derived from its

TX-TERRESTRIAL (TT)

RX-LOOP Will allow the modem’s internal clock to be phase locked to the RX buffer clock

Example: The user has an available high stability 10 MHz clock source but the end

EXTERNAL CLOCK Indicates that an unbalanced high-stability source is expected at the J9 BNC

internal high-stability source. This is the required setting when the TX interface type

is Audio.

Indicates that the unit expects to receive a clock from the DTE, to which the unit

can phase-lock its internal circuits. If no clock is detected the modem will substitute

its internal clock and generate an alarm. This is the required setting when the

modem’s interface type is G.703.

source. This output clock is Send Timing. Choosing RX-LOOP will not automatically

select RX-SAT as the buffer clock source. This allows for increased flexibility for

modem clock selection. Normally the user will select RX-SAT but the other choices

also are available.

equipment will only accept a clock at the information data rate. Selecting TX Clock

= RX-LOOP and RX buffer clock as EXT-REF will provide receive timing and send

timing to the end equipment that is sourced from the 10 MHz reference.

connector, or a balanced version at the P3A connector. The frequency must match

that programmed in the CONFIG: CLOCKS, EXTERNAL-BASEBAND-CLOCK

menu, and must be equal to the TX data rate.

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CONFIG:CLOCKS: RX BUFFER/CLOCK

CLK= RX-SAT (RX-SAT,TX-TERR,EXT-CLK,INS) BUFFER-SIZE = 00016bytes(00002ms) CENTER

Use the [←] [→] arrow keys to select one of the three parameters on the screen to edit.

Edit the RX clock options

RX-SAT

TX-TERR

EXT-CLK

INS

Sets the Receive buffer clock source to the satellite clock (The receive buffer will be bypassed.) Note: This will fix the buffer size to minimum.

In this timing mode, data is clocked out of the receive buffer using the external transmit clock.

In this timing mode, data is clocked out of the receive buffer using an External clock.

Sets the buffer clock to the Insert stream (INSERT mode only).

Buffer-Size indicates the size, in bytes, of the Plesiochronous/Doppler Buffer. In parentheses after this, the size in milliseconds is shown. Edit each digit of the buffer size using the [↑] [↓] arrow keys. Press ENTER.

Note: When the RX data rate is set to one of the four G.703 rates, the minimum buffer size and step size are limited to the value shown in the table below. In addition, Insert Framing follows the same rule, regardless of n x 64 data rate, depending upon whether the Insert Type is T1 or E1. If none of these cases is true, the minimum buffer size is 16 bytes with a step size of 2 bytes.

RX Data Rate Buffer Step Size

1544 kbps (T1) or open network D&I at T1 1158 bytes or 3 milliseconds for D4

2048 kbps (E1) or open network D&I at E1 1024 bytes or 4 milliseconds D&I++ at n = 1, 3 or 5 720 bytes D&I++ at n = 2, 6 10 or 15 1440 bytes D&I++ at n = 9 2160 bytes D&I++ at n = 4, 12 or 20 2880 bytes D&I++ at n = 18 4320 bytes D&I++ at n = 7 or 21 5040 bytes D&I++ at n = 8 or 24 5760 bytes D&I++ at n = 11 7920 bytes D&I++ at n = 13 9360 bytes D&I++ at n = 14 10080 bytes D&I++ at n = 16 11520 bytes D&I++ at n = 17 12240 bytes D&I++ at n = 19 13680 bytes D&I++ at n = 22 15840 bytes D&I++ at n = 23 16560 bytes 6312 kbps (T2) 1578 bytes or 2 milliseconds 8448 kbps (E2) 528 bytes or 0.5 milliseconds

using the [↑] [↓] arrow keys, then press ENTER

(6 milliseconds for ESF)

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If CENTER is selected, the following sub-menu is displayed:

CONFIG: CLOCKS: RX BUFFER/CLOCK: CENTER

Follow the instructions on the screen.

PRESS ENTER TO CENTER THE BUFFER

OTHERWISE, PRESS CLEAR

CONFIG: CLOCKS: EXT-BASEBAND-CLOCK

EXTERNAL BASEBAND CLOCK = 02048.000 kHz TYPE = UNBAL (UNBAL,BAL)

To edit the EXTERNAL BASEBAND CLOCK, select the digit to be edited using the [←] [→] arrow keys. Edit the value of the digit using the [↑] [↓] arrow keys. Press ENTER.

CONFIG: CLOCKS: EXT-FREQ-REF

EXTERNAL FREQUENCY REFERENCE: INTERNAL (HIGH-STABILITY INTERNAL,1,2,5,10,20MHz)

For units with Firmware Version: 1.4.0 or greater, and with a High-Stability module installed: Edit the selection using the [↑] [↓] arrow keys. Press ENTER.

CONFIG: CLOCKS: INTERNAL REFERENCE

INTERNAL HI-STABILITY 10 MHz REFERENCE FINE ADJUST: +048 (+/-999)

For units with Firmware Version: 1.4.0 or greater, with a High-Stability module installed, and with the Hi-Stability Internal 10 MHz Reference selected: Very fine adjustment of the Internal 10MHz Reference may be made. The adjustment value is retained in EEPROM memory, and hence is not lost when the Nvram memory is cleared (which happens on uploading new firmware). Note: changes made to the adjust value are implemented immediately, not after the ENTER key is pressed.

Select the digit to be edited using the [←] [→] arrow keys. Edit the value of the digit using the [↑] [↓] arrow keys. Press ENTER.

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6.3.1.6 CONFIG: DROP & INSERT

Drop and Insert is discussed in the Chapter “Clock modes and Drop and Insert (D&I)” later in this manual.

IMPORTANT

DRP-TYPE= T1-D4 CHAN/TS LOOP=Y (Y/N) INS-TYPE= T1-D4 CHAN/TS

sing the [←] [→] arrow keys, select one of the five parameters on the screen.

Note that Drop and Insert operation is a FAST option. Selecting LOOP will tie Drop

Data Out (DDO) to Insert Data Input (IDI) without the user having to externally connect cables to these ports.

The Drop-Type and Insert-Type and Loop (Y/N) are edited on this screen using the [↑] [↓] arrow keys. The Drop & Insert-Types are:

To edit the Channel Timeslots (CHAN/TS) for either Drop or Insert, press ENTER and

another screen will be shown:

• T1 – D4

• T1 – ESF

• E1 – CCS

• E1 – CAS

CONFIG: DROP & INSERT: DROP CHANNEL TIMESLOTS

DRP-CH: 1 2 3 4 TS: 01 02 03 04

Select the Time-slot to edit using the [←] [→]arrow keys and edit the value using the

[↓] [↑] arrow keys, then press ENTER.

The number of Channels and Time-slots shown depends on the data rate.

If the data rate is 1920 kbps, then only the E1 formats are available, and the CHAN/TS menus are disabled. This is the ‘fixed channel’ mode where all timeslots are allocated in order.

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CONFIG: DROP & INSERT: INSERT CHANNEL TIMESLOTS

INS-CH: 1 2 3 4 TS: 01 02 03 04

Select the Time-slot to edit using the [←] [→] arrow keys and edit the value using the [↑] [↓]arrow keys, then press ENTER.

The number of Channels and Time-slots shown depends on the data rate.

If the data rate is 1920 kbps, then only the E1 formats are available, and the CHAN/TS menus are disabled. This is the ‘fixed channel’ mode where all timeslots are allocated in order.

6.3.1.7 CONFIG: EDMAC

EDMAC MODE = MASTER (IDLE/MASTER/SLAVE) EDMAC ADDRESS = XXXX

Select either IDLE, MASTER, or SLAVE, using the [↑] [↓] arrow keys, then press ENTER.

 An EDMAC MASTER is a unit which is local to the M&C computer, and

which passes messages, via the overhead, to a distant-end modem. The MASTER address will always end in 0.

 An EDMAC SLAVE is a unit, which is not local to the M&C computer, which

is at the distant-end of a satellite link. The SLAVE EDMAC address will always end in 1.

See Chapter 11 EDMAC for more information.

6.3.1.8 CONFIG: MISC

MISC: G.703-LINE-CODE IDR-ESC-TYPE ADPCM-AUDIO-VOL HI-RATE-ESC WARM-UP

Select the parameter to edit using the [←] [→] arrow keys, then press ENTER.

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CONFIG: MISC: G.703 CODE

Tx G703/DDO CODE = AMI (AMI,B8ZS) Rx G703/IDI CODE = AMI (AMI,B8ZS)

Parameters may only be edited if the Interface Type is G.703.

Use the [←] [→] arrow keys to select the parameter to edit. Select either appropriate G.703 code using the [↑] [↓] arrow keys, then press ENTER.

Note that the choices displayed here will depend on the G.703 interface type, which has been selected. The choices are:

• HDB3 (for E1, E2 or sub-rate operation)

• B8ZS ( for T1 and unbalanced T2 operation)

• B6ZS (for balanced T2 operation)

CONFIG: MISC: IDR-ESC-TYPE

TX–IDR-TYPE: 64k DATA (64k DATA,AUDIO) RX-IDR-TYPE: 64k DATA (64k DATA,AUDIO)

Parameters may only be edited if the Interface Type is G.703.

Parameters may only be edited if the Framing Mode is IDR.

This menu permits a user to decide if the 64 kbps channel in the IDR overhead (normally reserved for the two 32 kbps ADPCM audio channels) should carry user data instead. The rear panel Overhead connector provides the appropriate EIA-422 interface for this option.

Use the [←] [→] arrow keys to select the parameter to edit. Select the appropriate IDRESC Type, using the [↑] [↓] arrow keys, then press ENTER.

CONFIG: MISC: ADPCM AUDIO VOLUME

TX-1 VOLUME= +0 dB TX-2 VOLUME= -2 dB RX-1 VOLUME= +2 dB RX-2 VOLUME= -4 dB

This menu permits the gain (or volume) of the audio ESC circuits, for both Receive and Transmit, to be varied. Note that the step size is 2dB.

Select the appropriate volume, using the [←] [→] arrow keys, and edit the volume using the [↑] [↓] arrow keys, and press ENTER.

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CONFIG: MISC: HIGH-RATE-ESC

HIGH-RATE-ESC = OFF (ON,OFF) BAUDRATE = 9600 PARITY:DATA:STOP = N81

The ESC type defined here depends on the framing type selected under CONFIG, MODE. The two options are either High-Rate IBS ESC, or ESC++

For units with Firmware Version: 1.3.1 or greater: Service Channel) is available as a FAST option in conjunction with IBS framing. If enabled, the lower of the TX or RX primary data rate, according to the table below, limits the maximum baud rate. Both TX and RX framing must be IBS to enable this feature.

Data rate 64 kbps 2400 > 127.999 kbps 4800 > 255.999 kbps 9600 > 383.999 kbps 14400 > 511.999 kbps 19200 > 767.999 kbps 28800 > 1023.999 kbps 38400

For units with Firmware Version: 2.0.1 or greater: enabled, the lower of the TX or RX primary data rate, according to the table below, limits the maximum baud rate. Both TX and RX framing must be set to ESC++. See Chapter 13 for more details on the framing used.

Data rate >= 64 kbps 4800 >= 128 kbps 9600 >= 192 kbps 14400 >= 256 kbps 19200 >= 384 kbps 28800 >= 512 kbps 38400

Max ESC baud rate

Max ESC++ baud rate

The High Rate IBS (Engineering

ESC++ is available as standard. If

CONFIG: MISC: WARM-UP

HIGH-STAB REFERENCE POWER-UP WARM-UP:

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NO DELAY(INSTANT-ON) (INSTANT-ON,DELAY)

For units with Firmware Version: 1.4.0 or greater, and with a High-Stability module installed: The High-Stability Reference Module contains an oven for the crystal. It can take a little time for the oven & crystal to come up to temperature. During this time, the frequency accuracy is not guaranteed. This menu allows the user to select a warm-up delay, which will be implemented on power-up. The delay is calculated by the modem, based on temperature and the amount of time the unit was turned off.

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If the Warm-up Delay is enabled, when the modem is powered up, a Warm-Up Delay Countdown will be activated, during which the TX is suppressed. The Countdown of the remaining Warm-up Delay is displayed on the front panel, for example:

COMTECH CDM-600 OPEN NETWORK MODEM HIGH-STABILITY REF WARMING UP: 045 SEC

If necessary, this Warm-up period can be by-passed by pressing the CLEAR key.

6.3.1.9 CONFIG: REMOTE CONTROL

REMOTE CONTROL = LOCAL (LOCAL,REMOTE)

Select LOCAL or REMOTE using the [↑] [↓] arrow keys, then press ENTER.

If LOCAL is selected, the REMOTE CONTROL is disabled. Remote monitoring is still possible.

If REMOTE is selected, then the following sub-menus will be displayed.

ONFIG: REMOTE CONTROL: INTERFACE

INTERFACE= RS-485-4W (232,485-2,485-4) ADDRESS= 0001 BAUDRATE= 9600

Use the [←] [→] arrow keys to select the parameter to edit: Interface, Address or Baudrate.

Edit the Interface type, Baudrate and each digit of the Address using the [↑] [↓] arrow keys.

 For EIA-485, the permitted address range is 1 to 9999.

 Address 0 is reserved for universal addressing.

 For EIA-232, the Address is fixed at 0000.

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CONFIG: REMOTE CONTROL: CHAR FORMAT

E72 Even parity 7 Data bits 2 Stop bits O72 Odd parity 7 Data bits 2 Stop bits

PARITY:DATA-BITS:STOP-BITS = N81 (N81,E72,O72)

Edit the I/O character format using the [↑] [↓] arrow keys. The options are:

N81 No parity 8 Data bits 1 Stop bit

6.3.1.10 CONFIG: MASK

These sub-menus permit the user to selectively mask, or make active, various alarms and traffic conditions that are monitored in the unit.

CONFIGURE ALARM MASK: AIS BUFFER RXIF SAT-ALM TERR-ALM

Use the [←] [→] arrow keys to select the parameter to edit, then press ENTER. One of the following sub-menus will be displayed:

CONFIG: MASK: AIS

AIS: TX-TERR-AIS= MASKED (ACTIVE,MASK) RX-SAT-AIS = ACTIVE (ACTIVE,MASK)

Use the [←] [→] arrow keys to select the parameter to edit: Select either ACTIVE or MASKED, using the [↑] [↓] arrow keys, then press ENTER.

 If TX-TERR-AIS is set to ACTIVE, a fault will be generated whenever the

modulator senses that the ‘all ones’ condition is present in the terrestrial data.

 If RX-SAT-AIS is set to ACTIVE, a fault will be generated whenever the

demodulator senses that the ‘all ones’ condition is present in the receive data.

 If an alarm is MASKED, no alarm will be generated.

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CONFIG: MASK: BUFFER SLIP

BUFFER SLIP= ACTIVE (ACTIVE,MASK)

Select either ACTIVE or MASKED, using the [↑] [↓] arrow keys, then press ENTER.

• If the user selects ACTIVE, then a Buffer Slip fault will be generated whenever

the receive circuitry senses that the buffer has either underflowed, or overflowed.

• If the user selects MASKED, no alarm will be generated.

CONFIG: MASK: RX-IF

RXIF: AGC = ACTIVE (ACTIVE,MASK) EbNo = MASKED (ACTIVE,MASK)

Use the [←] [→] arrow keys to select the parameter to edit: AGC or EbNo. Select either ACTIVE or MASKED, using the [↑] [↓] arrow keys, then press ENTER.

 If the user selects ACTIVE, then an AGC will be generated whenever the

receive signal level exceeds –20 dBm (for the desired carrier). An Eb/No fault will be generated whenever the demodulator sees the receive Eb/No fall below the pre-determined value.

 If the user selects MASKED, no alarm will be generated.

CONFIG: MASK: SATELLITE ALARMS

Select either TX or RX, using the [←][→] arrow keys, then press ENTER.

SATELLITE ALARMS

TRANSMIT RECEIVE

CONFIG: MASK: SATELLITE ALARMS: TX

PROCESS ALARMS FROM (H/W, S/W, OFF) BWA1=OFF BWA2=OFF BWA3=S/W BWA4=H/W

Select the Backward Alarm (BWA) to be edited using the [←][→] arrow keys. Edit the settings using the [↑] [↓] arrow keys, then press ENTER. Select how the TX IDR

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backward alarm inputs are to be used. An activated alarm may respond to a hardware input at P5A (H/W) or be software controlled by a receive fault on the modem (S/W).

CONFIG: MASK: SATELLITE ALARMS: RX

PROCESS ALARMS RECEIVED FROM SATELLITE

BWA1=N, BWA2=N, BWA3=N, BWA4=N

Select which Receive IDR backward alarms are to be monitored.

CONFIG: MASK: TERR-ALM

TERR-ALM: TX = ACTIVE (ACTIVE,MASK)

RX = OFF (OFF,ENABLED)

These alarms are only valid for D&I operation.

Use the [←] [→] arrow keys to select the parameter to edit. Edit the alarms using the [↑] [↓] arrow keys, then press ENTER.

6.3.1.11 CONFIG: IMPEDANCE

IF IMPEDANCE = 50 (50,75 OHMS)

Select either 50 or 75Ω, using the [↑] [↓] arrow keys, then press ENTER. Note that this affects both the Rx and Tx IF ports simultaneously.

6.3.1.12 CONFIG: STATISTICS

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LINK STATISTICS LOGGING INTERVAL:

00 minutes (00 TO 90)

Edit the logging interval (the period of time over which the statistics will be measured), using the [↑] [↓] arrow keys, then press ENTER. Setting a value of 00 disables the feature (no logging).

The user can choose 00, 10, 20, 30, 40, 50, 60, 70, 80, or 90 minutes. For more information about the Statistics data taken, refer to Section 6.3.4.3 Monitor: Statistics.

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6.3.2 TEST

MODEM TEST MODE = NORMAL (NORM,TX-CW,TX-1/0,IF↓,RF↓,DIG↓,I/O↓)

Select TEST Mode or Normal Operation from the parameters shown in the parentheses using the [↑] [↓] arrow keys, then press ENTER.

This sub-menu permits the user to select the following test modes:

NORM

TX-CW

TX-1,0

IF LOOP

DIG LOOP

I/O LOOP

RF LOOP

(Normal) This clears any test modes or loopbacks, and places the unit back into an operational state.

(Transmit CW) This is a test mode, which forces the modulator to transmit a pure carrier (unmodulated).

(Transmit an alternating 1,0,1,0 pattern) This is a test mode, which forces the modulator to transmit a carrier modulated with an alternating 1,0,1,0 pattern, at the currently selected symbol rate. This causes two discrete spectral lines to appear, spaced at +/- half the symbol rate, about the carrier frequency. This mode is used to check the carrier suppression of the Modulator.

(IF Loopback) This test mode invokes an internal IF loop. This is a particularly useful feature, as it permits the user to perform a quick diagnostic test without having to disturb external cabling. Furthermore, all of the receive configuration parameters are temporarily changed to match those of the transmit side. When NORMAL is again selected, all of the previous values are restored.

(Digital Loopback) This test mode invokes a digital loopback, which loops data at the output of the Reed-Solomon encoder on the transmit side, back into the Reed-Solomon decoder on the receive side. This tests all of the interface, transmit baseband circuits, FEC encoder, FEC decoder, and buffer.

(Inward/Outward loopback) This test mode invokes two distinct loopbacks. The first of these is the inward loop, which takes data being received from the satellite direction, and passes it directly to the modulator. Simultaneously, the outward loop is invoked, whereby data being fed to the transmit data interface is routed directly back out of the receive data interface.

(RF Loopback) This test mode is almost identical to the IF loop mode. All of the receive configuration parameters (except Rx Spectrum Invert) are temporarily changed to match those of the transmit side, however, no internal connection is made. This is useful for performing a satellite loopback. When NORMAL is again selected, all of the previous values are restored.

The IF, Digital, and I/O Loopback modes are illustrated in Figure 6-1.

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Figure 6-4. Loopback Modes

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6.3.3 INFORMATION

INFO: ALL ID FORMAT TX RX CLOCKS EDMAC DROP INSERT REMOTE ALARM-MASK MISC

Select information to view using the [←][→] arrow keys, then press ENTER.

Note: INFO screens display information on the current configuration of the modem without risking inadvertent changes.

INFO:ALL

ALL = START

(STOP, START)

This menu permits the user to view the configuration of the unit, in a step-by-step process by scrolling through each menu in succession. Press ENTER to continue through all the configurations.

Note that the user may only view the configurations – no editing is possible.

Press CLEAR to discontinue.

INFO: ID

MODEM CIRCUIT ID:

----A TEST MESSAGE TO SHOW CIRCUIT ID---

This displays the user-defined Circuit ID string (40 characters), which is entered via the UTILITY, ID screen. To return to the previous menu, press ENTER.

INFO: MODE

INFO: MODE: TX = G.703B: DROP (B8ZS)

RX = G.703B: INSERT (B8ZS)

An example of a Mode Information screen is shown above.

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INFO: TX

TX:ON 070.00000MHz Z=50 PWR=-20.0 TSI=N

IT+RS:220/200 00604.000 QPSK 7/8 SCRM

A sample display of TX Info is shown. The information displayed here is as follows:

Top Line:

TX carrier TX Frequency Impedance Power TSI

Bottom line:

Encoder

Data Rate Modulation FEC rate Scrambler

INFO: RX

RX:070.00000MHz Z=50 02.0dB +-30 RSI=N

IT+RS:126/112 00604.000 QPSK 1/2 SCRM

A sample display of RX Info is shown. The information displayed here is as follows:

Top line:

RX Frequency Impedance Eb/No Sweep Range RSI

Bottom line:

Decoder

Data Rate Demodulation FEC rate Descrambler

XXXXX.XXX MHz 50 or 75 Ω 12 dB (Alarm Point) up to ± 32 kHz RSI = RX Spectral Inversion, I=Inverted (on), N=Not inverted (off)

FEC type: VITERBI, SEQ, TCM, VIT+RS, SEQ+RS, TCM+RS, TPC, LDPC NONE: x (x = Differential Encoder setting, , shown as DE-OFF or DE-ON) xxxxx.xxx kbps (an asterix * indicates that the data sense is inverted) BPSK, QPSK, OQPSK, 8-PSK, 8-QAM, 16-QAM 1/2, 2/3, 3/4, 7/8, 0.95, 5/16, 21/44 or 1/1 SCRM, NONE, or IESS (Turbo Only)

ON, OFF, or RTI xxxxx.xxx MHz 50 or 75 Ω Power Level (dB) TSI = TX Spectral Inversion, I=Inverted (on), N=Not inverted (off)

FEC type: VITERBI, SEQ, TCM, VIT+RS, SEQ+RS, TCM+RS, TPC, LDPC NONE: x (x = Differential Encoder setting, shown as DE-OFF or DE-ON) xxxxx.xxx kbps (an asterix * indicates that the data sense is inverted) BPSK, QPSK, OQPSK, 8-PSK, 8-QAM, 16-QAM 1/2, 2/3, 3/4, 7/8, 0.95, 5/16, 21/44 or 1/1 SCRM, NONE, or IESS (Turbo Only)

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INFO: CLOCKS

CLOCKS:TX=INT(SCT)RX=EXT-CLK REF=INT10 BUFFER-SIZE=00016 CLK=02048U

The TX Clock, RX Clock and Buffer information is displayed.

Note: The Clock (CLK) information is shown only if Rx Clock is set to EXT-CLK.

INFO: EDMAC

EDMAC FUNCTION= O EDMAC MODE= MASTER EDMAC ADDR= 0020

This screen shows if EDMAC is enabled or not. If it is enabled, the EDMAC Mode and Address are shown.

INFO: DROP TYPE

DROP TYPE= CH:1 E1-CCS TS:01

This screen shows the Drop Type. Pressing ENTER takes the user back to the previous menu.

INFO: INSERT TYPE

INSERT TYPE= CH:1 E1-CCS TS:01

This screen shows the Insert Type. Pressing ENTER takes the user back to the previous menu.

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INFO: REMOTE

REMOTE-CONTROL= LOCAL ADDRESS= 0000 INTERFACE = RS-232 9600 BAUD N81

This screen shows if the unit is in Local or Remote mode, provides the details of the electrical interface type selected, the unit’s address and the baud rate selected. Pressing ENTER takes the user back to the previous menu.

INFO: ALARMS MASK

If an alarm is not masked, a blank is displayed in the relevant screen position.

ALARMS MASKED: TX-AIS RX-AIS BUF-SLIP AGC EBNO SAT

This screen shows only the alarm(s) that are currently masked:

• TX-AIS

• RX-AIS

• BUF-SLIP

• AGC

• EBNO

• SAT

• TERR

INFO: MISC

MISCELLANEOUS: NORMAL 1:1 SWITCH = NOT CONNECTED ONLINE

This screen shows the following:

• Test Mode

• 1:1 Link Status

• Redundancy Status

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6.3.4 MONITOR

MONITOR: LIVE-ALARMS STORED-EVENTS STATISTICS RX-PARAMS AUPC-PARAMS

Select the parameter to Monitor using the [←][→]

MONITOR: LIVE-ALARMS

LIVE UNIT= NONE NET= NONE ALARMS RECV=DEMOD LOCK XMT= NONE

An example of an Alarm screen is shown. The highest priority alarm currently active for each of the four alarm types is shown:

Unit PSU: Power supplies (+5V, +12V, -5V, +18V, -12V) are always monitored by an

onboard supervisory IC. TX and RX SYNTH: The PLLs in the IF sections are monitored for an unlocked condition. POWER CAL: Calibration data stored in EEPROM is checked at power up to verify that the factory calibration has not been corrupted. FPGA downloads (Main chain, Turbo FEC, Modem “Top” card, Mux and Demux) are verified to have been loaded successfully.

Hi-Stab Freq Ref Module: No PLL Lock – This will suppress the TX carrier.

Transmit NO CLOCK: Clock activity from the Tx terrestrial source is checked, if expected. If

absent, the modem falls back to the internal SCT clock to drive the modulator. FIFO SLIP: alarm occurs when the terrestrial clock source differs from the programmed data rate, or may indicate a hardware failure. TX AIS: Alarm Indication Signal (all 1’s) present at the Tx terrestrial input is monitored. AUPC LEVEL: If AUPC is enabled, a Tx alarm occurs if the power increase limit has been reached.

Hi-Stab Freq Ref Module: Ref Activity Fault

Receive DEMOD LOCK: indicates either the demodulator or the following FEC decoder

cannot lock to the incoming signal.

AGC ALARM: is indicated if the demod signal level is >-20 or <-60 dBm. FRAME SYNC: indicates that the de-framing unit (EDMAC, IBS or IDR) or Reed-

Solomon outer decoder cannot synchronize to the data being sent to it by the demod and/or FEC decoder.

BUFF SLIP: occurs when Doppler or Plesiochronous effects cause the Rx data buffer to empty or fill completely. The results in a reset to 50%.

RX AIS: Alarm Indication Signal (all 1’s) present at the Rx satellite input is monitored. EbNo ALARM: occurs when the monitored level drops below that programmed by

the user in the CONFIG, RX, EbNo menu. BUFF CLOCK: indicates that the desired buffer reference is not present, causing the buffer to fall back on Rx satellite timing to clock its output.

arrow keys, then press ENTER.

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Unit Network

LOSE TxFRM: Loss of Tx frame occurs in Drop & Insert operation,

when the incoming T1 or E1 frame cannot be found by the modem. BER >10E-3: This error rate monitor is enabled for IBS and IDR framing. LOSE TxMUL: Loss of Tx multiframe occurs in E1-CAS D&I operation, when the multiframe marker for CAS signaling data cannot be found. Tx Sig AIS: An AIS condition in the signaling positions of an incoming E1-CAS frame is monitored. TX TERR RM indicates the presence of the Tx terrestrial remote alarm on the incoming T1 or E1 frame. IBS RX REM indicates the presence of the IBS satellite remote alarm (backward alarm) on the incoming IBS frame from the transmit side of the link. IDR RX BW1-4: Multi-destinational backward alarms are the corresponding satellite alarms used by the IDR frame structure. IDR TX BW1-4: Backward alarms 1-4 indicate that the hardware inputs available on the back panel of the modem have triggered, resulting in the corresponding Tx backward alarm being generated by the modem’s IDR framer.

6.3.4.1 MONITOR: STORED EVENTS

STORED EVENTS: CLEAR ALL: NO (NO,YES) #199 FT-FRAME SYNC 23/07/01 16:25:24

An example of a Stored Events screen is shown. Use the [↑] [↓] arrow keys to select

Clear All: YES or NO,

Use the [←][→] arrow keys to select the ‘#’ character on the bottom line to view the log entries. Scroll backwards or forwards through the entries in the event log, using the [↑] [↓] arrow keys. Pressing ENTER or CLEAR will take the user back to the previous menu. The event log can store up to 199 events. When a fault condition occurs, it is timestamped and put into the log. Similarly, when the fault condition clears, this is also recorded.

If the user selects CLEAR ALL, the event log is cleared, and the user is taken directly back to the previous menu. However, if there are faults present on the unit at this time, they will be re-time-stamped, and new log entries will be generated.

Note that in accordance with international convention, the date is shown in DAYMONTH-YEAR format.

then press ENTER.

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6.3.4.2 MONITOR: STATISTICS

STATISTICS: STA114: 16.0,16.0,9.0,9.0 09/12/99 14:48:06 CLEAR ALL: NO (N/Y)

The user may scroll backwards or forwards through the entries in the statistics log, using the [↑] [↓] arrow keys. Pressing ENTER or CLEAR will take the user back to the previous menu. The top line displays the log entry number and event log. The bottom line of the display indicates the time and date of the entry shown in DAY-MONTH-YEAR format. The display shows the statistics data that has been measured and recorded. The statistics log can store up to 199 log entries. (To enable statistics logging, see Section

6.3.1.12.)

The meaning and format of the numbers is as follows:

• The user defines a measurement interval (see CONFIG, STATS) and during this

interval, Eb/No and Transmit Power Level Increase (TPLI) are observed, at a 1 second rate.

• At the end of this period, the average Eb/No is calculated and recorded, and the

minimum value seen in the interval.

• Similarly, the average TPLI is calculated, along with the highest value seen in the

interval.

If the demod has lost lock during the measurement interval, the minimum Eb/No will show ‘LOSS’ rather than indicate a value. However, the average value (while the demod was locked) will still be

IMPORTANT

calculated and shown. If, on the other hand, the demodulator has been unlocked for the entire measurement interval, the average Eb/No will also show ‘LOSS’. (The display will show ‘LOSS,LOSS’.)

• If the measured values are ≥ 16.0 dB, the display will show 16.0 dB.

• If AUPC is not enabled, the values of maximum and average TPLI will both

show ‘0.0'.

Example:

08.0,13.5,2.5,1.8 means: Minimum Eb/No observed in the measurement interval = 8.0 dB Average Eb/No observed in the measurement interval = 13.5 dB Maximum TPLI observed in the measurement interval = 2.5 dB Average TPLI observed in the measurement interval = 1.8 dB

LOSS,04.5,0.0,0.0 means: There was a loss of demod lock during the measurement interval Average Eb/No observed in the measurement interval = 4.5 dB Maximum TPLI observed in the measurement interval = 0 dB Average TPLI observed in the measurement interval = 0 dB (Which indicates

no AUPC activity, or that AUPC is disabled.)

Use the [←] or [→ ] arrow keys to select the CLEAR ALL option. Select Yes or No using the [↑ ] or [↓] arrow keys and press ENTER to implement, or CLEAR.

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