Comtech EF Data SNM 1002 Modem Operation and Maintenance Manual

SNM-1002
LinkSync Modem
Operation and Maintenance Manual
Part Number MN/SNM1002.OM Revision 2
SNM-1002
LinkSync™ Modem
Operation and Maintenance Manual
Comtech EFData is an ISO 9001
Registered Company.
Part Number MN/SNM1002.OM
Revision 2
May 15, 2002
Copyright © Comtech EFData, 2000. All rights reserved. Printed in the USA.
Comtech EFData, 2114 West 7th Street, Tempe, Arizona 85281 USA, 480.333.2200, FAX: 480.333.2161.
SNM-1002 LinkSync™ Modem
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Network Customer Support
The Network Customer Support Plan identifies the steps to be followed in resolving the
Customer’s concern.
The resolution efforts will follow these levels of contact:
•
•
•
Level One Contact – Factory Authorized Service Center.
Level Two Contact – Comtech EF Data Customer Support.
Level Three Contact – Network Test and Field Support
Procedural Steps
Step
1
Procedure
The Customer raises a concern with the Level One Contact.
2
The Level One Contact will perform Hardware repairs and Network Operations
troubleshooting in accordance with the Comtech EF Data Service Center
agreement.
3
If the Level One Contact is unable to resolve the concern, then the Level One
Contact will inform the Level Two Contact of the concern in accordance with the
instructions found within the attached Comtech EF Data Customer Support
Department’s document.
4
The Level Two Contact will enter the concern into the Comtech EF Data database
and determine whether the concern is a Hardware concern or a Network
Operations concern
5
The Level Two Contact will interface with the Level One Contact and provide
the appropriate hardware support and enter all correspondence into the Comtech EF
Data database.
6
If the Level Two Contact determines that the concern is a Network Operations
concern, then the Level Two Contact will inform the Level Three Contact.
7
The Level Three Contact will interface with the Level One Contact and provide
the appropriate support and enter all correspondence into the Comtech EF Data
database.
8
If the Level Three Contact determines that there is a Hardware failure then the
Level Three Contact will inform the Level Two Contact. Go to Step 5.
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Network Customer Support Plan
Customer
Yes
Midas Network is functioning
properly?
*Note: If equipment was purchased
directly from Comtech EFData (not
through a Factory Authorized
Service Center), then CEFD
Customer Support will be the initial
point of contact.
No
Level One Contact is notified
Authorized Factory Service
Center
Yes
Resolved by Hardware repair
or Network Operations
troubleshooting?
No
Level Two Contact is notified
CEFD Customer Support
CEFD Customer Support
provides HW support
Hardware or Network
Operations issue?
Hardware
Hardware
Network
Operations
Level Three Contact is notified
CEFD Network Test and Field
Support
CEFD Network Test and Field
Support
provides Network Operations
support
Hardware or Network
Operations issue?
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See the Comtech EF Data website at http://www.comtechefdata.com for contact information for a Factory Authorized
Service Center. Contact the Factory Authorized Service Center for:
• Product support
• Information on upgrading or returning a product
Contact the Comtech EF Data Customer Support Department for:
• Product support or training
• Information on upgrading or returning a product
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)
480.333.2500 FAX
or, E-Mail can be sent to the Systems Support Engineering at:
[email protected]
To return a Comtech EF Data product (in-warranty and out-of-warranty) for repair or replacement:
1. Request a Return Material Authorization (RMA) number from the Comtech EF Data
Customer Support Department.
2. Be prepared to supply the Customer Support representative with the model number, serial
number, and a description of the problem.
3. To ensure that the product is not damaged during shipping, pack the product in its
original shipping carton/packaging.
4. Ship the product back to Comtech EF Data. (Shipping charges should be prepaid.)
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Contact the Comtech EF Data Network Test and Field Support for:
•
•
•
System level Network Operations support
Information on upgrading Network Operation software
Reporting comments or suggestions concerning manuals
A Network Test and Field Support representative may be reached at:
Comtech EF Data
Attention: Network Test and Field Support
2114 West 7th Street
Tempe, Arizona 85281 USA
480.333.2200 (Main Comtech EF Data Number)
480.333.3693 (Network Test and Field Support)
480.333.2161 (FAX)
or, E-Mail can be sent to the Network Test and Field Support Department at:
mailto:[email protected]
Contact us via the web at www.comtechefdata.com.
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Table of Contents
CHAPTER 1. INTRODUCTION ...................................................................................................... 1–1
1.1
Overview ...................................................................................................................................... 1–1
1.2
Mode of Operation ...................................................................................................................... 1–2
1.3
Options ......................................................................................................................................... 1–5
1.4
Specifications ............................................................................................................................... 1–6
1.4.1
1.4.2
Summary Specifications........................................................................................................................ 1–6
Environmental and Physical.................................................................................................................. 1–8
1.5
Bit Error Rate Performance ...................................................................................................... 1–8
1.6
Typical Spectral Occupancy .................................................................................................... 1–10
1.7
Dimensional Envelope .............................................................................................................. 1–11
CHAPTER 2.
INSTALLATION ................................................................................... 2–1
2.1
Unpacking.................................................................................................................................... 2–1
2.2
Installation ................................................................................................................................... 2–2
2.2.1
2.2.2
2.3
2.3.1
2.3.2
2.3.3
2.3.4
2.3.5
2.3.6
2.3.7
2.3.8
Typical Single-Thread Cable Installation.............................................................................................. 2–4
Typical Redundant Cable Installation ................................................................................................... 2–5
Rear Panel Connections.............................................................................................................. 2–7
Remote Connector and Pinouts (J6)......................................................................................................
Data I/O Interface Connector (J8) .........................................................................................................
RF Output Connector (CP1)..................................................................................................................
RF Input Connector (CP2) ....................................................................................................................
External Reference (CP3)......................................................................................................................
AC Power Connector ............................................................................................................................
DC Power - Optional.............................................................................................................................
Ground Connector (GND).....................................................................................................................
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2–8
2–8
2–8
2–8
2–9
2–9
2–9
2–9
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CHAPTER 3.
3.1
3.1.1
3.1.2
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OPERATION ........................................................................................ 3–1
Front Panel .................................................................................................................................. 3–1
LED Indicators ...................................................................................................................................... 3–2
Front Panel Keypad............................................................................................................................... 3–3
3.2
Menu System ............................................................................................................................... 3–4
3.3
Front Panel Menu ....................................................................................................................... 3–5
3.4
OPENING SCREEN................................................................................................................... 3–6
3.4.1 FUNCTION SELECT:CONFIGURATION ......................................................................................... 3–6
3.4.1.1
CONFIGURATION:MODULATOR..............................................................................................3–7
3.4.1.2
CONFIGURATION:DEMODULATOR ......................................................................................3–11
3.4.1.3
CONFIGURATION:INTERFACE ...............................................................................................3–15
3.4.1.4
CONFIGURATION:SAVE...........................................................................................................3–20
3.4.1.5
CONFIGURATION:RECALL......................................................................................................3–20
3.4.2 FUNCTION SELECT:MONITOR ....................................................................................................... 3–21
3.4.2.1
MONITOR:RAW BER .................................................................................................................3–21
3.4.2.2
MONITOR:CORRECTED BER...................................................................................................3–21
3.4.2.3
MONITOR:EB/NO .......................................................................................................................3–21
3.4.2.4
MONITOR:RECEIVE SIGNAL...................................................................................................3–22
3.4.2.5
MONITOR:SWEEP FREQUENCY .............................................................................................3–22
3.4.2.6
MONITOR:BUFFER FILL...........................................................................................................3–22
3.4.3 FUNCTION SELECT:FAULTS/ALARMS ......................................................................................... 3–23
3.4.3.1
FAULTS AND ALARMS:MODULATOR ..................................................................................3–24
3.4.3.2
FAULTS AND ALARMS:DEMODULATOR.............................................................................3–24
3.4.3.3
FAULTS AND ALARMS:TX INTERFACE ...............................................................................3–25
3.4.3.4
FAULTS AND ALARMS:RX INTERFACE ...............................................................................3–26
3.4.3.5
FAULTS AND ALARMS:COMMON .........................................................................................3–27
3.4.4 FUNCTION SELECT:STORED FLTS/ALMS .................................................................................... 3–28
3.4.4.1
STORED FLTS/ALMS:MODULATOR ......................................................................................3–29
3.4.4.2
STORED FLTS/ALMS:DEMODULATOR .................................................................................3–29
3.4.4.3
STORED FLTS/ALMS:TX INTERFACE....................................................................................3–30
3.4.4.4
STORED FLTS/ALMS:RX INTERFACE....................................................................................3–31
3.4.4.5
STORED FLTS/ALMS:COMMON..............................................................................................3–32
3.4.4.6
STORED FLTS/ALMS:CLEAR...................................................................................................3–32
3.4.5 FUNCTION SELECT:UTILITY .......................................................................................................... 3–33
3.4.5.1
UTILITY:MODULATOR.............................................................................................................3–34
3.4.5.2
UTILITY:DEMODULATOR .......................................................................................................3–37
3.4.5.3
UTILITY:INTERFACE ................................................................................................................3–39
3.4.5.4
UTILITY:SYSTEM ......................................................................................................................3–43
3.4.5.5
UTILITY:MODEM TYPE............................................................................................................3–48
3.4.5.6
UTILITY:FACTORY SETUP (NOT APPLICABLE)..................................................................3–53
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THEORY OF OPERATION ................................................................. 4–1
4.1
Monitor and Control (M&C) ..................................................................................................... 4–1
4.2
Modulator .................................................................................................................................... 4–3
4.2.1
4.2.2
4.2.3
4.3
4.3.1
4.3.2
Modulator Specifications ...................................................................................................................... 4–5
Theory of Operation.............................................................................................................................. 4–6
Theory of Modulation Types................................................................................................................. 4–7
Demodulator................................................................................................................................ 4–9
Demodulator Specifications .................................................................................................................. 4–10
Theory of Operation.............................................................................................................................. 4–11
CHAPTER 5.
5.1
5.1.1
5.1.2
5.1.3
5.2
5.2.1
5.2.2
5.2.3
MAINTENANCE.................................................................................. 5–1
System Checkout......................................................................................................................... 5–1
Interface Checkout ................................................................................................................................ 5–2
Modulator Checkout.............................................................................................................................. 5–3
Demodulator Checkout ......................................................................................................................... 5–6
Fault Isolation.............................................................................................................................. 5–8
System Faults/Alarms ........................................................................................................................... 5–8
Faults/Alarms Display........................................................................................................................... 5–12
Faults/Alarms Analysis ......................................................................................................................... 5–12
APPENDIX A.
REMOTE CONTROL OPERATION..................................................A–1
APPENDIX B.
REDUNDANT WIRING SCHEMATIC...............................................B–1
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Figures
Figure 1-1.
Figure 1-2.
Figure 1-3.
Figure 1-4.
Figure 1-5.
Figure 1-6.
Figure 1-7.
Figure 1-8.
Figure 2-1.
Figure 2-2.
Figure 2-3.
Figure 2-2.
Figure 3-1.
Figure 3-2.
Figure 3-3.
Figure 3-4.
Figure 4-1.
Figure 4-2.
Figure 4-3.
Figure 5-1.
Figure 5-2.
Figure 5-3.
Figure 5-4.
SNM-1002 .............................................................................................................................................1–1
Typical NMS Configuration ..................................................................................................................1–2
Typical Redundancy for the Network and LinkSync Modems ..............................................................1–3
Modular Design .....................................................................................................................................1–3
Block Diagram .......................................................................................................................................1–5
Viterbi BER Performance Curves..........................................................................................................1–9
Typical Spectral Occupancy ................................................................................................................1–10
SNM-1002 Dimensional Envelope ......................................................................................................1–11
Installation of the Mounting Bracket .....................................................................................................2–3
Typical Single-Thread Installation.........................................................................................................2–4
Typical Redundant Wiring Schmetic .....................................................................................................2–6
View of Rear Panel ................................................................................................................................2–7
Front Panel View ...................................................................................................................................3–1
Keypad ...................................................................................................................................................3–3
Main Menu.............................................................................................................................................3–5
Baseband Loopback .............................................................................................................................3–18
M&C Block Diagram.............................................................................................................................4–2
Modulator Block Diagram .....................................................................................................................4–4
Demodulator Block Diagram .................................................................................................................4–9
Fault Isolation Test Setup ......................................................................................................................5–2
Typical Output Spectrum (with Noise) ..................................................................................................5–5
Typical Output Spectrum (without Noise) .............................................................................................5–5
Typical Eye Constellations ....................................................................................................................5–7
Tables
Table 1-1.
Table 1-2.
Table 2-1.
Table 2-2.
Table 3-1.
Table 4-1.
Table 4-2.
Table 5-1.
Table 5-2.
Summary Specifications..........................................................................................................................1–6
Environmental and Physical....................................................................................................................1–8
Rear Panel Connectors ............................................................................................................................2–4
Remote Connector and Pinouts (J6) ........................................................................................................2–5
LED Indicators ........................................................................................................................................3–2
Modulator Specifications ........................................................................................................................4–5
Demodulator Specification....................................................................................................................4–10
Conversion to S/N and Eb/N0 Chart.........................................................................................................5–4
SNM-1002 Fault Tree .............................................................................................................................5–9
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About this Manual
This manual provides installation and operation information for the Comtech EF Data
SNM-1002 LinkSync™ Modem. This is a technical document intended for earth station
engineers, technicians, and operators responsible for the operation and maintenance of
the SNM-1002 LinkSync™ Modem.
Conventions and References
Cautions and Warnings
CAUTION
CAUTION indicates a hazardous situation that, if not avoided, may result in
minor or moderate injury. CAUTION may also be used to indicate other
unsafe practices or risks of property damage.
WARNING indicates a potentially hazardous situation that, if not avoided,
could result in death or serious injury.
WARNING
IMPORTANT indicates a statement that is associated with the task
being performed. .
IMPORTANT
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.
Recommended Standard Designations
Recommended Standard (RS) Designations have been superseded by the new designation
of the Electronic Industries Association (EIA). References to the old designations are
shown only when depicting actual text displayed on the screen of the unit (RS-232, RS485, etc.). All other references in the manual will be shown with the EIA designations
(EIA-232, EIA-485, etc.) only. For more information, refer to the Department of Defense
(DOD) MIL-STD-188-114A, “Electrical Characteristics of Digital Interface Circuits.”
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Trademarks
Products names mentioned in this manual may be trademarks or registered trademarks of
their respective companies and are hereby acknowledged.
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: [email protected]
Electrical Safety
The SNM-1002 LinkSync 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 85 to 264 volts AC. It has a maximum
power consumption of 60 watts.
Fuses
The SNM-1002 LinkSync Modem is fitted with two fuses, one each for line and neutral
connections. These are contained within the body of the IEC power 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.
IMPORTANT
Environmental
The SNM-1002 must not be operated in an environment where the unit is exposed to extremes of
temperature outside the ambient range 0 to 50°C (32 to 122°F), 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 SNM-1002 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 SNM-1002 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
Protective Earth
Fuse
Chassis Ground
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.
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EMC (Electromagnetic Compatibility)
In accordance with European Directive 89/336/EEC, the SNM-1001 Network 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 SNM-1001-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 (50 Ω or
RG59/U (75 Ω).
•
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 two 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-to-use
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 Network Customer Support Department.
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Chapter 1. INTRODUCTION
This chapter provides an overview of the SNM-1002 LinkSync Modem, referred to in
this manual as “the modem” (Figure 1-1).
Figure 1-1.
SNM-1002
LinkSync
Modem
1.1
Overview
The SNM-1002 LinkSync™ modem is a high performance, digital modem designed to
provide LinkSync™ functionality for Comtech EF Data's Bandwidth-on-demand (BOD)
Multimedia Integrated Digital Access System (MIDAS).
Features of the SNM-1002 include:
•
•
•
•
•
19.2 kbit/s, QPSK, 1/2 rate continuous demodulator.
2.4 kbit/s to 4.375 mbit/s continuous modulator.
50/180 MHz operation.
Extensive online monitoring.
Built in Self-test.
1–1
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Mode of Operation
The SNM-1002 is an integral component of the MIDAS Network Management System
(NMS), providing the LinkSync™ monitor and control communication between the NMS
and the MIDAS network.
LinkSync™ provides three key functions for the MIDAS network.
•
•
•
Automatic Frequency Control (AFC) for all modems within the network.
Power Management for all active traffic circuits within the network.
Circuit Disruption capability which allows the NMS to terminate circuits
between any two internal traffic nodes (SNM-1010/1010L)in the network.
The SNM-1002 performs a critical roll for each of these three LinkSync™ capabilities
under the direct control of the MIDAS NMS. Refer to Chapter 4. Theory of Operation.
NETWORK CONTROL MODEM
(SNM-1001)
EIA-422
EIA-232
ETHERNET
EIA-232
E NTE R
C LEA R
S
N
M
- 1
0 0
1
N
e
t w
o r k
A
S
S
D
A
T
E
C
o
n
T RANS MI T
- 1AL 2
T
t r o
F
0 AU 0
RECEI V E
L
R
LM
S
I T
E
L
TT
S
l
M
o d
e
m
TR ANSMI T
P O WER O N
RECE I VE
T RANS MITTE R ON
IF
(50-180 MHz)
ENT ER
ECOM MON
R
M
CA
I RRIE
N R DET
A ECTL
CLE AR
S TO RED
T EST MO DE
T M
OPERATOR
WORKSTATION
NMS
CONTROLLER
LinkSync MODEM
(SNM-1002)
OPTIONAL PRINTER
(USER SUPPLIED)
Figure 1-2. Typical NMS Configuration
1–2
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Figure 1-3. Typical LinkSync Redundancy
1.2.1
Description
The modem contains:
Built-in scramblers/descramblers
Differential encoder/decoder
TX and RX frequency synthesizers
Multi-rate FEC convolutional Viterbi Decoder
The modem is a complete, self-contained unit in a standard, one-rack unit (1 RU), 19inch (48 cm), rack-mountable enclosure weighing approximately 9 lbs. (4 kg). The unit
was constructed using modular design (Figure 1-4), and consists of from two to five
Printed Circuit Boards (PCBs), depending on the configuration. The modem consists of
two, major, replaceable assemblies as follows:
•
•
Rear panel, main PCB, and power supply
Upper and lower enclosures (chassis) and the front panel
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Figure 1-4. Modular Design
The front panel of the modem contains all Monitor and Control (M&C) function
indicators used for operating the modem. The modem can be operated remotely via the
M&C connection on the rear panel. Refer to Chapter 2 for connector information and
Appendix A for remote control operation information.
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Refer to Figure 1-5 for a system block diagram.
Figure 1-5. Block Diagram
1.3
Options
Option
Primary Input Power: 90-264 VAC
-48 VDC
IF Impedance :
75Ω
50Ω
1–5
Remarks
KT/8000-3
KT/8000-4
PL/6093-1
PL/6093-3
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1.4
Specifications
1.4.1
Summary Specifications
Table 1-1 lists a summary of the specifications.
Table 1-1. Summary Specifications
Parameter
Operating Frequency Range
Modulation Type
Operating Channel Spacing
Digital Interface
Digital Data Rate
Scrambling/Descrambling
Forward Error Correction
Filter Mask Types
Modulator
Output Power
Output Spurious
Output Impedance
Output Return Loss
Data Clock Source
Demodulator
Input Power:
Desired Carrier
Adjacent Carriers
Maximum Total
Input Impedance
Input Return Loss
Carrier Acquisition Range
Clock Acquisition Range
AGC Output
Specification
50 to 180 MHz, in 1 Hz steps
QPSK
BPSK
Less than 0.5 dB degradation operating with 2 adjacent-like channels,
each 10 dB higher at 1.3 times the symbol rate.
EIA-422/449 on 37-pin D
QPSK, R=1/2, 2.4 kbps to 4.375 Mbps
CCIT INTELSAT V.35
Viterbi, K=7, Rate 1/2, 3/4, 7/8
Closed net (Comtech EF Data)
-5 to –30 dBm, adjustable in 0.1 dB steps
< -55 dBc, 0 to 500 MHz
75Ω (Optional: 50Ω)
20 dB
Internal , ± 1 x 10-5 stability
-30 to –55 dBm
+30 dBc total power within 10 MHz from desired carrier
+40 dBc in-band (0 to 500 MHz)
-5 dBm
75Ω (Optional: 50Ω)
20 dB
± 35 kHz maximum
± 100 PPM
0 to 10V at 10 mA maximum
Default Levels:
0V for –60 dBm
10V for –25 dBm
Levels can be programmed in 0.5V increments.
1–6
SNM-1002 LinkSync™ Modem
Introduction
Revision 2
MN/SNM1002.OM
Table 1-1. Summary Specifications (Continued)
Remote Control Specification
Signal Interface
Baud Rate
Signals Controlled/Monitored
Signals Monitored
Configuration Retention
Addressing
Diagnostic
Diagnostic Features
EIA-232
19.2 kbps
Acquisition Sweep Parameters
Baseband Loopback
Buffer Clock TX/RX/INT
Buffer Size
Code and decode Rate
Data Rate Select
Descrambler On/Off
Descrambler Type
Differential Encoding and Decoding
IF Loopback
Interface Loopback
MOD/DEMOD Spectrum Normal/Invert
Rev Emulation Current/Function
RF Loopback
RX Clock Normal/Invert
RX Frequency
Scrambler On/Off
Scrambler Type
Self Test
Transmitter On/Off
TX Frequency
TX Power
TX/RX Filter Mask
Corrected BER
Fault Status
Power Supply Voltage
Raw Error Rate
RX Carrier Detect
RX Eb/No
RX Signal Level
Stored Fault Status
Will maintain current configuration for at least 1 year without power.
Programmable from 1 to 255 possibilities
Address 0 is reserved for global addressing.
BER Monitoring
Buffer Fill Status Monitoring
Fault Monitoring (include current and stored faults)
IF Loopback
Input IF Power Monitoring
Remote Control via Serial Port
RF Loopback
1–7
SNM-1002 LinkSync™ Modem
Introduction
1.4.2
Revision 2
MN/SNM1002.OM
Environmental and Physical
Table 1-2. Environmental and Physical
Parameter
Size
Power
Operating Temperature
Storage Temperature
Humidity
Mounting
Operational Shock
Survivability Shock and Vibration
Weight
Shipping:
Weight
Size
1.5
Specifications
1 rack unit (1RU)
1.75" H x 19.0" W x 14" D (4.4 H x 48 W x 36 D cm)
Prime power 90 to 264 VAC, 47 to 63 Hz,
40W maximum, fused at 2A
Optional: 38 to 64 VDC
0 to 50°C (32 to 122° F)
-55 to +70° C (-67 to 158° F)
0 to 95% non-condensing
Standard 19-inch (48.3 cm) rack mounts
Note: Front and rear accepts standard rack mount slides
When any one corner of the modem is dropped from 1 cm
onto a hard surface, the modem will not take any errors or
faults
MIL-STD-167-1
MIL-STD-810D Method 514.4, Procedure 8, 1 hour/axis
9 lbs. Maximum
(4 kg Maximum)
15 lbs. (7 kg)
20 x 21 x 9 inch (51 x 53 x 23 cm)
Bit Error Rate Performance
The following specifications for the Eb/N0 required to achieve 10-3 to 10-8 BER for
different coding configurations. All values are for operating in QPSK mode. Without
coding, the modem provides QPSK operation within 0.8 dB of theoretical for BER in the
range 10-1 to 10-6. Performance measurements were recorded with transmit and receive IF
connected back-to-back through an additive white Gaussian noise channel. Refer to
Figure 1-6 for the performance BER curves.
BER
10-3
10-4
10-5
10-6
10-7
10-8
Eb/N0 (dB) Specification
1/2 Rate
3/4 Rate
7/8 Rate
4.2
5.2
6.4
4.8
6.0
7.2
5.5
6.7
7.9
6.1
7.5
8.6
6.7
8.2
9.2
7.2
8.8
9.9
1–8
SNM-1002 LinkSync™ Modem
Introduction
1.5.1
Revision 2
MN/SNM1002.OM
BER Threshold
The modem will have a programmable BER threshold function. This will allow the
operator to set the threshold from 1.0 E-3 to 1.0 E-8.
10-2
10-3
10-4
10-5
10-6
BER
10-7
10-8
1/2 Rate
3/4 Rate
7/8 Rate
10-9
SPECIFICATIONS
10-10
3.0
4.0
5.0
6.0
7.0
8.0
9.0
Eb/N0 (dB)
Figure 1-6. Viterbi BER Performance Curves
1–9
10.0
11.0
SNM-1002 LinkSync™ Modem
Introduction
1.6
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MN/SNM1002.OM
Typical Spectral Occupancy
Figure 1-7. Typical Spectral Occupancy
1–10
SNM-1002 LinkSync™ Modem
Introduction
1.7
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Dimensional Envelope
Note: All dimensions are in English units (centermeters are in parenthesis).
Figure 1-8. SNM-1002 Dimensional Envelope
1–11
SNM-1002 LinkSync™ Modem
Introduction
Revision 2
MN/SNM1002.OM
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1–12
Chapter 2. INSTALLATION
This chapter provides unpacking and installation instructions, and a description of
external connections information.
CAUTION
2.1
The equipment contains parts and assemblies sensitive to damage by
Electrostatic Discharge (ESD). Use ESD precautionary procedures when
touching, removing, or inserting PCBs.
Unpacking
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.
2.
3.
4.
5.
6.
7.
Cut the tape at the top of the carton indicated by OPEN THIS END.
Remove the cardboard/foam space covering the modem.
Remove the modem, manual, and power cord from the carton.
Save the packing material for storage or reshipment purposes.
Inspect the equipment for any possible damage incurred during shipment.
Check the equipment against the packing list to ensure the shipment is correct.
Refer to Section 2.2 for installation instructions.
2–1
SNM-1002 LinkSync Modem
Installation
2.2
Revision 2
MN/SNM1002.OM
Installation
The modem arrives fully assembled from the factory. After unpacking the modem, install
the modem as follows:
1. If required, install the mounting bracket in equipment rack (Figure 2-1). Install
and tighten the bracket bolts.
2. Loosen the screw with flat washer located on the left side of modem chassis.
Mount the modem chassis into the equipment rack and slide the screw with flat
washer through the slot of the mounting bracket. Tighten the screw sufficiently to
allow the modem chassis to slide in the bracket.
3. Connect the cables to the proper locations on the rear panel. Refer to Section 2.3
for connector pinouts, placement, and function.
4. Connect the primary power cable to the power source. Before turning on the
power switch, become familiar with the front panel operation in Chapter 3.
5. If problems exist with the installation, refer to Chapter 5 for troubleshooting
information.
2–2
SNM-1002 LinkSync Modem
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Figure 2-1. Installation of the Mounting Bracket
2–3
SNM-1002 LinkSync Modem
Installation
2.2.1
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MN/SNM1002.OM
Typical Single-Thread Cable Installation
Note: Cables may be procured from Comtech EF Data by contacting Comtech EF Data
Network Customer Support department for information.
1. Connect supplied Y-Cable (Figure 2-2) as follows:
a. Connect the supplied-cable base connector to the FASTCOM card.
b. Connect supplied-cable Port 1 connector to the Comtech EF Data
supplied EIA-422 cable from SNM-1001 Modem.
c. Cable Port 2 connector is not connected.
2. Connect 9-pin EIA-232 cable from Controller Server COM 1 port to SNM-1001
Remote port (J6).
a. If non-redundant SNM-1001, the following remote settings are required:
• EIA-232
• 19.2 Baud rate
• 8N1
3. Connect 9-pin EIA-232 cable from Controller Server COM 2 port to SNM-1002
Remote port (J6).
4. Connect 25-pin pre-programmed dongle (security key) to Controller Server
25-pin I/O port.
Figure 2-2. Typical Single-Thread Installation
2–4
SNM-1002 LinkSync Modem
Installation
Item No.
1
2
3
4
Cable Description
Comtech EF Data
Supplied
CA/5684
EIA-232
EIA-232
From
FASTCOM Card
CA/5684
To
Supplied Y-Cable
MIDAS Controller COM 2
MIDAS Controller COM 1
Port 1 of the SNM-1001
SNM-1002 Remote port (J6)
SNM-1001Remote port (J6)
Redundant LinkSync (Network Control) Modem Installation
Network Control Modem
A typical redundant wiring schematic is included to assist the user in establishing a
redundant configuration. The following table can assist the user in cable selection and
location. One or both of the 1:1 redundant configurations can be installed in a MIDAS
System. Figure 2-3 shows both Network Control Modem and LinkSync Modem
Redundancy.
Item No.
1
2
3
4
5
6
7
8
9
10
11
LinkSync Modem
2.2.2
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MN/SNM1002.OM
12
13
14
15
16
17
18
19
20
21
Cable Description
CA/5684
EIA-422 37-pin
EIA-422 37-pin
BNC
BNC
BNC
BNC
BNC
BNC
EIA-232 9-pin
Ribbon Cable
EIA-232
EIA-422 37-pin
EIA-422 37-pin
EIA-232 9-pin
Ribbon Cable
BNC
BNC
BNC
BNC
BNC
BNC
EIA-232
2–5
From
MIDAS Controller
SMS-301 (J2)
SMS-301 (J3)
SMS-301 (J4) (TX-IF)
SMS-301 (J8) (RX-IF)
SMS-301 (J9) A
SMS-301 (J6) B
SMS-301 (J7) B
SMS-301 (J5) A
SMS-301 (J13)
Modem COM
SMS-301 (J10)
Remote Control
SMS-301 (J2)
SMS-301 (J3)
SMS-301 (J13)
Modem COM
SMS-301 (J9) A
SMS-301 (J8) RX-IF
SMS-301 (J4) TX-IF
SMS-301 (J5) A
SMS-301 (J7) B
SMS-301 (J6) B
SMS-301 (J10)
Remote Control
To
SMS-301 J1 COM
SNM-1001(A) (J8)
SNM-1001 (B) (J8)
Combiner
Combiner
SNM-1001(A) CP2 TX/IF
SNM-1001(B) CP1 TX/IF
SNM-1001(B) CP2 RX/IF
SNM-1001(A) CP1 TX/IF
SNM-1001(A) (J6) Remote
SNM-1001(B) (J6) Remote
MIDAS Controller COM1
SNM-1002 (A) Data I/O
SNM-1002 (B) Data I/O
SNM-1002(A) (J6) Remote
SNM-1002(B) (J6) Remote
SNM-1002 A) CP2 RX-IF
Combiner
Combiner
SNM-1002(A) CP1 TX-IF
SNM-1002(B) CP2 RX-IF
SNM-1002(B) CP1 TX-IF
MIDAS Controller COM2
SNM-1002 LinkSync Modem
Installation
Revision 2
MN/SNM1002.OM
Figure 2-3. Typical Redundant Wiring Schematic
2–6
SNM-1002 LinkSync Modem
Installation
2.3
Revision 2
MN/SNM1002.OM
Rear Panel Connections
The rear panel connectors provide all necessary external connections between the modem
and other equipment.
Table 0-1 lists these connectors, and Figure 2-4 shows their locations.
Figure 2-4. View of Rear Panel
Table 0-1. Rear Panel Connectors
Name
REMOTE
FAULT
Connector is not used.
DATA I/O
AUX 1
Connector is not used.
REF DES
J6
J7
Connector Type
9-pin D
9-pin D
Function
Remote Interface
FORM C Fault Relay Contacts
J8
J9
37-pin D
9-pin D
J10
9-pin D
EIA-422
(TTL) Faults
Satellite Clock
Demod I/Q
Automatic Gain Control (AGC) Out
FORM C Alarm
Relay Contacts
RF Output
RF Input
Input
ALARMS
Connector is not used.
TX/IF OUTPUT
RX/IF INPUT
EXTERNAL REF
AC INPUT
GROUND
CP1
CP2
CP3
NONE
NONE
BNC
BNC
BNC
IEC
10-32 Stud
Note: The European EMC Directive (EN55022, EN50082-1) requires using properly shielded
cables for DATA I/O. These cables must be double-shielded, ensuring a continuous ground
shield.
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SNM-1002 LinkSync Modem
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Remote Connector and Pinouts (J6)
The remote connector is a 9-pin female D connector (J6) located on the rear panel of the
modem. Screw locks are provided for mechanical security of the mating connector.
The remote connector interfaces the M&C functions to the MIDAS Controller. This is an
EIA-232 DCE interface. Refer to Appendix A for a description of the remote interface.
Refer to Table 0-2 for pinout information.
Table 0-2. Remote Connector and Pinouts (J6)
EIA-232
Pin #
Name
1
2
RD (RX)
3
TD (TX)
4
5
GND
6
DSR
7
RTS
8
CTS
9
2.3.2
Data I/O Interface Connector (J8)
This connector is only utilized when the modem is operating in a Redundant LinkSync
Configuration. In a Redundant LinkSync Configuration, the Data I/O cable connects
between an SNM-301 1:1 Switch and J8 of the LinkSync modem. Refer to Chapter 1,
Figure 1-3.
2.3.3
RF Output Connector (CP1)
CP1 is a BNC connector for the transmit IF signal. The standard output impedance is 75Ω,
and the output power level is -5 to -30 dBm. In normal operation, the output will be a
QPSK- or BPSK-modulated signal between 50 and 180 MHz, in 1 Hz steps.
2.3.4
RF Input Connector (CP2)
CP2 is a BNC connector for the receive IF signal. The standard input impedance is 75. For
normal operation, the desired carrier signal level should be between -30 and -55 dBm.
Signals between 50 and 180 MHz are selected and demodulated to produce clock and data
at the Data I/O connector.
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External Reference (CP3)
CP3 is a BNC connector for an external reference. The input impedance is 75Ω. For
normal operation, the reference signal is ≥ 0 dBm.
2.3.6
AC Power Connector
The AC power is supplied to the SNM-1002 by a standard, detachable, non-locking,
3-prong power cord. Refer to the following listing for AC power specifications.
Input power
50W max.
Input voltage
90 to 264 VAC, 47 to 63Hz.
Note: Unit switches ranges automatically.
2.3.7
Connector type
IEC
Fuse protection
1A slo-blo line and neutral fusing 5 mm type fuses.
DC Power - Optional
For DC supplied units, the DC Power is supplied by terminal lugs installed on the back
panel. Refer to the following table for specifications
2.3.8
Input power
50W max.
Input voltage
38 to 64 VDC.
Connector type
Terminal Lug
Fuse protection
1A slo-blo 5 mm type fuses.
Ground Connector (GND)
A #10-32 stud on the rear panel of the modem is used for connecting a common chassis
ground among all equipment.
Note: The AC power connector provides the safety ground.
2–9
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Installation
Revision 2
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2–10
Chapter 3. OPERATION
3.1
Front Panel
Note: Front panel operation of the LinkSync modem is only required for initial
installation for setting the remote communication parameters. Under normal operation,
the MIDAS NMS configures and controls the LinkSync for all of the functions it
provides. A complete menu tree is shown for navigational purposes only.
The modem front panel (Figure 3-1) enables control of modem configurations parameters
and displays the modem status.
Figure 3-1. Front Panel View
The front panel features include:
•
•
•
32-character, 2-line LCD display
6-button keypad for local control
10 LEDs to provide overall status at a glance
3–1
SNM-1002 LinkSync Modem
Operation
3.1.1
Revision 2
MN/SNM1002.OM
LED Indicators
The 10 LEDs on the front panel indicate:
•
•
•
General modem summary faults
Status
Alarms
The indicators are defined in Table 3-1 as follows:
Table 3-1. LED Indicators
Name
LED
Transmit
Receive
Common
Stored
Red
Red
Red
Yellow
Power On
Transmitter On
Green
Green
Carrier Detect
Test Mode
Green
Yellow
Transmit
Receive
Yellow
Yellow
Meaning
Faults
A fault condition exists in the transmit chain.
A fault condition exists in the receive chain.
A common equipment fault condition exists.
A fault has been logged and stored.
The fault may or may not be active.
Status
Power is applied to the modem.
Transmitter is currently on.
This indicator reflects the actual condition of the transmitter, as
opposed to the programmed condition.
Decoder is locked.
Flashes when the modem is in a test configuration.
Alarms
A transmit function is in an alarm condition.
A receive function is in an alarm condition.
3–2
SNM-1002 LinkSync Modem
Operation
3.1.2
Revision 2
MN/SNM1002.OM
Front Panel Keypad
The front panel keypad permits local operation of the modem. The keypad consists of six
keys (Figure 3-2). It is locked out for normal use.
ENTER
CLEAR
Figure 3-2. Keypad
Each key provides one or more logical functions. These functions are defined in the
following table.
ENTER
Left and Right
Diamond Keys
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 keys are used to move to the next selection or to move the cursor for
certain functions.
Top and Bottom
Diamond Keys
Note: Throughout this chapter, [←] and [→] are used to indicate left and right
diamond keys.
These keys are used primarily to change configuration data (numbers). At times,
they are also used to move from one section to another.
CLEAR
Note: Throughout this chapter, [↑] and [↓] are used to indicate top and bottom
diamond keys.
The modem responds by beeping whenever a key is pressed:
•
A single beep indicates a valid entry and the appropriate action was taken.
•
A double beep indicates an invalid entry or a parameter is not available for
operation.
3–3
SNM-1002 LinkSync Modem
Operation
3.2
Revision 2
MN/SNM1002.OM
Menu System
Use the Main menu in Figure 3-3 as a quick reference for accessing the modem functions.
When the modem power is applied, the base level of the menu system displays the
sign-on message:
•
•
Line 1 of the sign-on message is the modem type.
Line 2 is the node address.
The main level of the menu system is Function Select. To access this level from the
sign-on message, press the [←] or [→] keys. From the Function Select menu, select one
of the functional categories:
•
•
•
•
•
Configuration
Monitor
Faults/Alarms
Stored Faults/Alarms
Utility
Press [←] or [→] to move from one selection to another. When line 2 displays the desired
function, select that level by pressing [ENTER]. After entering the appropriate functional
level, press [←] or [→] to move to the desired function.
To view the modem’s configuration, enter the Configuration level from the Function
Select menu. Once in the Configuration menu, press [←] or [→] to scroll through the
Configuration menu selection:
•
•
•
•
•
Modulator
Demodulator
Interface
Save
Recall
Press [ENTER] to select the desired Configuration menu option. To view the options for
the selected configuration parameters, press [←] or [→].
Notes:
1. Menus or commands that are specific to certain modem configurations are only
accessible after selecting the appropriate modem configuration. This prevents
incompatible parameters from accidentally being selected.
3. All of the windows are accessible in the Custom mode. Take caution not to select
incompatible parameters, as the modem does not shut out incompatible command
choices in the Custom mode.
3–4
SNM-1002 LinkSync Modem
Operation
3.3
Revision 2
MN/SNM1002.OM
Front Panel Menu
SELECT
CONFIGURATION
MONITOR
FAULTS/ALARMS
STORED FLTS/ALMS
UTILITY
CODE/DATA RATE
TX-IF FREQUENCY
TX-IF OUTPUT
TX POWER LEVEL
SCRAMBLER
DIFF ENCODER
CARRIER MODE
MODEM REFERENCE
MODULATOR
DEMODULATOR
INTERFACE
SAVE
RECALL
RAW BER
CORRECTED BER
EB/NO
RECEIVE SIGNAL
SWEEP FREQUENCY
BUFFER FILL
CODE/DATA RATE
RX-IF FREQUENCY
DESCRAMBLER
DIFF DECODER
RF LOOP BACK
IF LOOP BACK
BER THRESHOLD
SWEEP CENTER
SWEEP RANGE
REACQUISITION
MODULATOR
DEMODULATOR
TX INTERFACE
RX INTERFACE
COMMON
MODULATOR
DEMODULATOR
TX INTERFACE
RX INTERFACE
COMMON
CLEAR
TX CLOCK SOURCE
TX CLOCK PHASE
EXT-CLK FREQ
BUFFER CLOCK
RX CLOCK PHASE
B-BAND LOOP BACK
BUFFER SIZE
BUFFER CENTER
LOOP TIMING
MODULATOR
DEMODULATOR
INTERFACE
SYSTEM
MODEM TYPE
ASSIGNED FILTERS
MOD POWER OFFSET
MODULATOR TYPE
ENCODER TYPE
TX BPSK OREDERING
MOD SPECTRUM
TX SYMBOL RATE
FACTORY SETUP (NOT APPLICABLE
ASSIGNED FILTERS
DEMODULATOR TYPE
DECODER TYPE
RX BPSK ORDERING
DEMOD SPECTRUM
RX SYMBOL RATE
TX OVERHEAD TYPE
RX OVERHEAD TYPE
TX TERR INTERFACE
RX TERR INTERFACE
BUFFER PROGRAM
FRAMING STRUCTURE
RTS TX-IF CNTRL
TX DATA PHASE
RX DATA PHASE
CTS DELAY
TIME/DATE
REMOTE BAUD RATE
REMOTE ADDRESS
REMOTE TYPE
OPERATION MODE
YEAR DISPLAY
TEST MODE STATUS
LAMP TEST
SELF TEST
DISPLAY CONTRAST
M&C FIRMWARE
BOOT FIRMWARE
FPGA FIRMWARE
DEMO MODE
EXT AGC: MAX PWR
EXT AGC: MIN PWR
MASTER RESET
MODEM TYPE
MODEM EMULATION
REV EMULATION
MODEM OPTIONS
LOCAL MODEM AUPC
MODEM SERIAL
CONFIGURATION CODE
Figure 3-3. Main Menu
3–5
SNM-1002 LinkSync Modem
Operation
Revision 2
MN/SNM1002.OM
Note: The following menus tree shows the modem functions available for an SNM-1002
LinkSync Modem. The defaulkt settings used when deployed in a MIDAS Network are
underlined.
3.4
OPENING SCREEN
SNM 1002
Ver:X.X.X
3.4.1
FUNCTION SELECT:CONFIGURATION
FUNCTION SELECT
CONFIGURATION
The main level of the menu system is Function Select. To access this level from the
sign-on message, press the [←] or [→] keys. From the Function Select menu, select one
of the functional categories:
•
•
•
•
•
Configuration
Monitor
Faults/Alarms
Stored Faults/Alarms
Utility
Press [←] or [→] to move from one selection to another. When line 2 displays the desired
function, select that level by pressing [ENTER]. After entering the appropriate functional
level, press [←] or [→] to move to the desired function.
3–6
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Operation
3.4.1.1
Revision 2
MN/SNM1002.OM
CONFIGURATION:MODULATOR
CONFIGURATION
MODULATOR
To view the modem’s configuration, enter the Configuration level from the Function
Select menu. Once in the Configuration menu, press [←] or [→] to scroll through the
Configuration menu selection:
•
•
•
•
•
Modulator
Demodulator
Interface
Save
Recall
Press [ENTER] to select the desired Configuration menu option. To view the options for
the selected configuration parameters, press [←] or [→].
3.4.1.1.1
MODULATOR: CODE RATE/TYPE
TX-X QPSK 1/2
19.200
kbps
Transmit code rate/type as follows:
TX-A QPSK 1/2 19.200 kbps
TX-B QPSK 1/2 19.200 kbps
TX-C QPSK 1/2 19.200 kbps
TX-D QPSK 1/2 19.200 kbps
TX-V QPSK 1/2 19.200 kbps
Upon entry, the current transmitter rate is displayed.
3–7
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3.4.1.1.2
Revision 2
MN/SNM1002.OM
MODULATOR:TX-IF FREQENCY
TX-IF FREQUENCY
70.000000 MHz
Displays the modulator TX IF frequency between 50 and 180 MHz, in 1 Hz steps.
Upon entry, the current transmitter frequency is displayed with the flashing cursor on the
first character. Press [← ] or [→] to move the flashing cursor, and [↑ ] or [↓ ] to increase
or decrease the digit at the flashing cursor. Press <ENTER> to execute the change.
3.4.1.1.3
MODULATOR:TX-IF OUTPUT
TX-IF OUTPUT
ON
Displays the modulator output status, either On or Off.
Upon entry, the current TX-IF output is displayed with the flashing cursor on the first
character. Press [↑ ] or [↓ ] to On or Off. Press <ENTER> to execute the change.
3.4.1.1.4
MODULATOR:TX POWER LEVEL
TX POWER LEVEL
-10.0 dBm
Displays the modulator output level from:
•
-5.0 to –30.0 dBm (Normal Range)
Upon entry, the current TX power level is displayed with the flashing cursor on the first
character. Press [← ] or [→] to move the flashing cursor, and [↑ ] or [↓ ] to increase or
decrease the digit at the flashing cursor. Press <ENTER> to execute the change.
3–8
SNM-1002 LinkSync Modem
Operation
3.4.1.1.5
Revision 2
MN/SNM1002.OM
MODULATOR:SCRAMBLER
SCRAMBLER
ON
Displays the scrambler status, either On or Off.
Upon entry, the current scrambler is displayed with the flashing cursor on the first
character. Press [↑ ] or [↓ ] to change the carrier mode. Press <ENTER> to execute the
change
3.4.1.1.6
MODULATOR:DIFF. ENCODER
DIFF. ENCODER
ON
Displays the differential encoder status, either On or Off.
Upon entry, the current differential decoder is displayed with the flashing cursor on the
first character. Press [↑ ] or [↓ ] to change the carrier mode. Press <ENTER> to execute
the change.
3–9
SNM-1002 LinkSync Modem
Operation
3.4.1.1.7
Revision 2
MN/SNM1002.OM
MODULATOR:CARRIER MODE
CARRIER MODE
NORMAL-MODULATED
Displays the carrier mode of operation as follows:
Normal-Modulated
The carrier mode in normally in this Modulated position.
Center-CW
Generates a carrier at the current modulator frequency. This can be used to
measure the output frequency.
Offset-CW
Generates a single, upper, side-band-suppressed carrier signal. The upper sideband is at one-quarter of the symbol rate from the carrier. When inverted
spectrum is selected, this generates a single, lower, side-band-suppressed
carrier.
Dual-CW
Generates a dual side-band suppressed carrier signal. Side-bands are at one-half
of the symbol rate from the carrier. This is used to check the channel balance and
carrier null.
Upon entry, the current carrier mode is displayed with the flashing cursor on the first
character. Press [↑ ] or [↓ ] to change the carrier mode. Press <ENTER> to execute the
change.
3.4.1.1.8
MODULATOR:MODEM REFERENCE
MODEM REFERENCE
INTERNAL
Displays the following references to the modulator:
•
•
INTERNAL
EXT1, EXT5, EXT10, and EXT20 MHz
Note: If any EXT REF is selected for the modem reference and there is no input to CP3,
the modem will detect an alarm and switch to the INTERNAL clock.
Upon entry, the current modem reference is displayed with the flashing cursor on the first
character. Press [↑ ] or [↓ ] change the modem reference. Press <ENTER> to execute the
change.
3–10
SNM-1002 LinkSync Modem
Operation
3.4.1.2
Revision 2
MN/SNM1002.OM
CONFIGURATION:DEMODULATOR
CONFIGURATION
DEMODULATOR
3.4.1.2.1
DEMODULATOR:CODE RATE/TYPE
RX-X QPSK 1/2
19.200
kbps
Receive code rate/type as follows:
RX-A QPSK 1/2 19.200 kbps
RX-B QPSK 1/2 19.200 kbps
RX-C QPSK 1/2 19.200 kbps
RX-D QPSK 1/2 19.200 kbps
RX-V QPSK 1/2 19.200 kbps
Upon entry, the current transmitter rate is displayed. Press [↑ ] or [↓ ] change the
assigned filter. Press <ENTER> to execute the change.
3.4.1.2.2
DEMODULATOR:RX-IF FREQUENCY
RX-IF FREQUENCY
70.000000 MHZ
Displays the demodulator receive frequency, between 50 and 180 MHz, in 1 Hz steps.
Upon entry, the current RF-IF frequency is displayed. Press [↑ ] or [↓ ] change the
assigned filter. Press <ENTER> to execute the change.
3–11
SNM-1002 LinkSync Modem
Operation
3.4.1.2.3
Revision 2
MN/SNM1002.OM
DEMODULATOR:DESCRAMBLER
DESCRAMBLER
ON
Displays the descrambler status, either On or Off.
Upon entry, the current descrambler is displayed. Press [↑ ] or [↓ ] change the assigned
filter. Press <ENTER> to execute the change.
3.4.1.2.4
DEMODULATOR:DIFF.DECODER
DIFF. DECODER
ON
Displays the differential decoder status, either On or Off.
Upon entry, the current differential decoder is displayed. Press [↑ ] or [↓ ] change the
assigned filter. Press <ENTER> to execute the change.
3.4.1.2.5
DEMODULATOR:RF LOOP BACK
RF LOOP BACK
OFF
Displays the RF loop back status, either On or Off.
Upon entry, the current RF loop back is displayed. Press [↑ ] or [↓ ]. Press <ENTER> to
execute the change.
3–12
SNM-1002 LinkSync Modem
Operation
3.4.1.2.6
Revision 2
MN/SNM1002.OM
DEMODULATOR:IF LOOP BACK
IF LOOP BACK
OFF
Displays the IF loop back status, either On or Off.
Upon entry, the current IF loop back is displayed. Press [↑ ] or [↓ ]. Press <ENTER> to
execute the change.
3.4.1.2.7
DEMODULATOR:BER THRESHOLD
BER THRESHOLD
NONE
Displays the BER threshold .
If the BER threshold set is exceeded, a receive fault will be indicated by the modem
status indicators. BER threshold may be set from 1.0 E-3 to 1.0 E-8, or may be disabled
by specifying NONE.
Upon entry, the current BER threshold is displayed. Press [↑ ] or [↓ ]. Press <ENTER> to
execute the change.
3.4.1.2.8
DEMODULATOR:SWEEP CENTER
SWEEP CENTER
+
0 HZ
Displays the sweep center frequency for the directed sweep function. When in directed
sweep, the value from the sweep monitor screen (when the modem was last locked)
should be entered for the sweep center frequency. The sweep center frequency can be set
in the range from –35000 to +35000 Hz. Default: 0 Hz.
Upon entry, the current sweep center frequency is displayed with the flashing cursor on
the first character. Press [← ] or [→] to move the flashing cursor, and [↑ ] or [↓ ] to
increase or decrease the digit at the flashing cursor. Press <ENTER> to execute the
change.
3.4.1.2.9
DEMODULATOR:SWEEP RANGE
3–13
SNM-1002 LinkSync Modem
Operation
Revision 2
MN/SNM1002.OM
SWEEP RANGE
60000 HZ
Displays the overall travel of the sweep width range during acquisition in the directed
sweep mode. The sweep width may be set from 0 to 70000 Hz. Default: 60000 Hz.
When set at 70000 Hz, the modem is in Normal acquisition mode. The smaller the range,
the faster the modem will lock, provided the receive carrier center frequency is within the
RX-IF frequency sweep range.
3.4.1.2.10
DEMODULATOR:REACQUISITION
REACQUISITION
0 SECONDS
Displays the sweep reacquisition mode time duration. This is the time that the modem
will remain in a narrow sweep after loss of acquisition. After this timer runs out, the
modem will return to the normal acquisition sweep. The reacquisition time is 0 to 999
seconds. Default: 0 seconds.
3–14
SNM-1002 LinkSync Modem
Operation
3.4.1.3
Revision 2
MN/SNM1002.OM
CONFIGURATION:INTERFACE
CONFIGURATION
INTERFACE
3.4.1.3.1
INTERFACE:TX CLOCK SOURCE
TX CLOCK SOURCE
SCT (INTERNAL)
Programs the clock source for the modem transmitter clock to the following
configurations:
TX TERRESTRIAL
Sets the TX clock to recover timing from the incoming clock/data.
SCT (INTERNAL)
Sets the TX clock to operate from the modem internal clock (this also is the
fallback clock).
Note: When loop timing is enabled, SCT (LOOP) is displayed instead of SCT
(INTERNAL).
RX (SATELLITE)
Sets the RX clock to recover timing from the output clock/data.
EXT CLOCK
Sets the TX clock to operate from the EXT-CLK clock. Transmit clock source
must be phase/frequency locked to the data that is being transmitted. The
correct frequency must be programmed into EXT-CLK FREQ.
Upon entry, the current TX clock source is displayed. Press [↑ ] or [↓ ] to make the
selection. Press <ENTER> to execute the change.
3–15
SNM-1002 LinkSync Modem
Operation
3.4.1.3.2
Revision 2
MN/SNM1002.OM
INTERFACE:TX CLOCK PHASE
TX CLOCK PHASE
INVERT
Programs the TX clock phase to AUTO, NORMAL, INVERT.
Upon entry, the current TX clock phase is displayed. Press [↑ ] or [↓ ] to make the
selection. When AUTO is s elected, the modem will automatically select NORMAL or
INVERT to properly phase the TX clock with the TX data. Press <ENTER> to execute
the change.
3.4.1.3.3
INTERFACE:EXT-CLK FREQ
EXT-CLK FREQ
1544.000 KHZ
Programs the external reference clock input frequency between 8.0 kHz and 10.0 MHz.
Default: 1544 kHz.
Note: The clock rate must be equal to the data rate unless the asymmetrical loop timing
option is present.
This clock frequency can be any multiple of 600 Hz from 2.4 to 64 kHz, and can be any
multiple of 8 kHz from 64 kHz to 4.376 MHz.
This can be used for the Doppler/plesiochronous buffer reference. It can be a reference to
SCT. Use the master clock input on J8 for the external master reference. The EXT REF
on CP3 only allows for 1, 5, 10, and 20 MHz external reference input.
Upon entry, the current setting for the external reference is displayed. Press [←] or [→]
to increment or decrement the digit at the flashing cursor. Press [ENTER] to execute the
change.
3–16
SNM-1002 LinkSync Modem
Operation
3.4.1.3.4
Revision 2
MN/SNM1002.OM
INTERFACE:BUFFER CLOCK
BUFFER CLOCK
RX (SATELLITE)
Programs the interface buffer output clock to one of the following modes:
RX (SATELLITE)
Sets the output buffer clock to the satellite clock. (This is a Bypass.)
SCT (INTERNAL)
Sets the buffer clock to operate from the modem internal clock. This is
also the fallback clock.
EXT. CLOCK
Sets this clock source to the external clock.
TX TERRESTRIAL
Sets the buffer output clock to recover timing from the incoming TX data
clock.
INSERT CLOCK
Selects the recovered clock from the insert send data input received from
the terrestrial equipment.
Upon entry, the current setting of the plesiochronous buffer clock is displayed. Press [↑] or
[↓] to make the selection. Press [ENTER] to execute the change.
3.4.1.3.5
INTERFACE:RX CLOCK PHASE
RX CLOCK PHASE
NORMAL
Programs the RX clock phase to Normal or Inverted.
Upon entry, the status of the RX Clock is displayed. Press [↑] or [↓] to make the selection.
Press [ENTER] to execute the change.
3–17
SNM-1002 LinkSync Modem
Operation
3.4.1.3.6
Revision 2
MN/SNM1002.OM
INTERFACE:B-BAND LOOP BACK
B-BAND LOOP BACK
OFF
Programs the modem for baseband loopback operation, On or Off.
When baseband loopback is turned on, the data and timing signals are switched from the
demodulator to the modulator on the modem side of the interface. The DTE baseband
signals are also looped back from the transmitter data and clock to receiver data and clock
on the customer side of the interface. This is a bi-directional loopback of the baseband data.
Refer to figure 3-4 for a block diagram of baseband loopback operation.
Upon entry, the status is displayed. Press [↑] or [↓] to make the selection. Press [ENTER] to
execute the change.
CUSTOMER
DATA
IBS OR IDR
ENCODER/
MODULATOR
TRANSMIT RF
EQUIPMENT
INTERFACE
ANTENNA
REMOTE SERIAL
INTERFACE
MICROCOMPUTER
POWER SUPPLY
AC POWER
FAULT INDICATORS
DEMODULATOR/
DECODER
RECEIVE RF
EQUIPMENT
SATELLITE MODEM
Figure 3-4. Baseband Loopback
Note: When baseband loopback is turned on, data is looped back on the customer side of the
interface. This is a bi-directional loopback of the baseband data. This test mode will verify the
customer equipment and cabling between the modem and the customer equipment. The baseband
loopback is not bi-directional in D&I.
3–18
SNM-1002 LinkSync Modem
Operation
3.4.1.3.7
Revision 2
MN/SNM1002.OM
INTERFACE:BUFFER SIZE
BUFFER SIZE
0 (BYPASS)
Sets the size of the buffer, 32 to 262144 bits, 1 to 99 mS , or 0 (Bypass)
Upon entry, the current buffer length is displayed. Press [↑] or [↓] to select the desired
buffer size. The buffer size is displayed in seconds or bits. Enter the Utility Interface menu
to change the buffer units to seconds or bits.
•
•
•
If selecting seconds, choose from 1 to 99 ms, in increments of 1 ms,
or 0 (Bypass).
If selecting bits, choose from 32 to 262144 bits, in increments of 16 bits.
Press [ENTER] to execute the change.
Note: To have the modem calculate the plesiochronous shift, set the buffer units to ms.
When a specific buffer depth is desired, set the buffer units to bits. Select bits or ms from
the Utility Interface menu.
3.4.1.3.8
INTERFACE:BUFFER CENTER
BUFFER CENTER
YES/NO
This configuration function is used to center the buffer. Choosing YES centers the buffer.
Press <ENTER> twice to center the buffer.
3.4.1.3.9
INTERFACE:LOOP TIMING
3–19
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Operation
Revision 2
MN/SNM1002.OM
LOOP TIMING
OFF
The SCT output will become phase-locked to the RX satellite clock.
TX and RX data rates must be equal unless the asymmetrical loop timing option is On or
Off.
Upon entry, the status is displayed. Press [↑] or [↓] to make the selection. Press [ENTER]
to execute the change.
3.4.1.4
CONFIGURATION:SAVE
CONFIGURATION
SAVE
The Configuration Save menu allows programming of configuration parameters into
memory on the M&C. There are five memory locations that may be used to store specific
configuration setups that are used frequently. After changing the configuration
parameters to the desired settings, enter the Configuration Save menu and select memory
location 1 through 5.
Press [ENTER] to execute the save.
3.4.1.5
CONFIGURATION:RECALL
CONFIGURATION
RECALL
The Configuration Recall menu allows the user to recall a previously saved configuration
setup. Upon entry, select memory location 1 through 5 by pressing [↑] or [↓].
Press [ENTER] to execute the recall.
3.4.2
FUNCTION SELECT:MONITOR
3–20
SNM-1002 LinkSync Modem
Operation
Revision 2
MN/SNM1002.OM
FUNCTION SELECT
MONITOR
3.4.2.1
MONITOR:RAW BER
RAW BER
NO DATA
Displays the current BER or “No Data” (if carrier is not locked).
Range: < m.m E-e to > m.m E-e.
Note: Low limit is based on performance. High limit is based on data/code rate.
3.4.2.2
MONITOR:CORRECTED BER
CORRECTED BER
NO DATA
Displays the current corrected BER or “No Data” (if carrier is not locked).
Range: 1.0 E-3 to 1.0 E-12.
Note: Low limit is based on performance. High limit is 1.0 E-12.
3.4.2.3
MONITOR:EB/NO
EB/NO
16.0
Displays the current Eb/N0 or “No Data” (if carrier is not locked).
Range: 2.0 to 16.0 dB.
Note: Low limit is based on the data rate. High limit is 16.0 dB.
3.4.2.4
MONITOR:RECEIVE SIGNAL
3–21
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Operation
Revision 2
MN/SNM1002.OM
RECEIVE SIGNAL
-60.0 DBM
Displays the current receive signal level.
Range: -25.0 to -60.0 dBm.
3.4.2.5
MONITOR:SWEEP FREQUENCY
SWEEP FREQUENCY
+
0 HZ
Displays the current offset frequency or “No Data” (if carrier is not locked).
Range: -35,000 to +35,000 Hz.
3.4.2.6
MONITOR:BUFFER FILL
BUFFER FILL
50%
Displays the current plesiochronous buffer fill status percent.
Range: 1 to 99%.
3.4.3
FUNCTION SELECT:FAULTS/ALARMS
3–22
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Operation
Revision 2
MN/SNM1002.OM
FUNCTION SELECT
FAULTS/ALARMS
The Faults/Alarms menu is accessible from the Function Select menu. The Faults/Alarms
are similar to monitor functions, as they display the current fault status of the group being
displayed.
Press [←] or [→] to move between the following Faults/Alarms groups:
•
•
•
•
•
Modulator
Demodulator
Transmit Interface
Receive Interface
Common Equipment
Line 2 of the display shows the current Faults/Alarms status in real time. For each
parameter monitored, fault status is displayed as one of the following:
•
•
•
“–” indicates that no fault or alarm exists.
“+” indicates that a fault exists, and will cause switching in a redundant system.
Reversed contrast “+” indicates an active alarm.
Unlike faults, alarms do not cause switching to occur. To display labels for individual
faults or alarms, press [ENTER].
Press [←] or [→] to move the flashing cursor to make the selection. The label for that
Fault/Alarm is then displayed on line 1 of the display. Press [CLEAR] to exit this level of
operation and return to the previous level.
The following sections outline the faults and alarms monitored and displayed in each
group.
3–23
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Operation
3.4.3.1
Revision 2
MN/SNM1002.OM
FAULTS AND ALARMS:MODULATOR
MODULATOR
+--------
3.4.3.2
IF SYNTHESIZER
Modulator IF synthesizer fault.
DATA CLOCK SYN
Transmit clock synthesizer fault. Indicates the internal Voltage
Controlled Oscillator (VCO) has not locked to the incoming data
clock.
I CHANNEL
I channel data activity fault.
Q CHANNEL
Q channel data activity fault.
AGC LEVEL
TX IF AGC level fault.
MODEM REF ACT
MODEM REF activity alarm.
MODEM REF PLL
MODEM REF PLL not locked.
MODULE
Modulator module fault.
CONFIGURATION
Modulator configuration fault.
FAULTS AND ALARMS:DEMODULATOR
DEMODULATOR
+-++----CARRIER DETECT
IF SYNTHESIZER
Carrier detect fault. Indicates the decoder is not locked.
Demodulator IF synthesizer fault. Indicates the IF synthesizer is
not locked.
I CHANNEL
I channel activity fault. Indicates a loss of activity in the I channel
of the quadrature demodulator.
Q CHANNEL
Q channel activity fault. Indicates a loss of activity in the
Q channel of the quadrature demodulator.
BER THRESHOLD
Secondary alarm result of the BER threshold set in the DEMOD
Configuration menu.
MODULE
Demodulator/decoder module fault.
CONFIGURATION
Demodulator/decoder configuration fault.
3–24
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Operation
3.4.3.3
Revision 2
MN/SNM1002.OM
FAULTS AND ALARMS:TX INTERFACE
TX INTERFACE
--------TX DROP
Not Applicable.
TX DATA/AIS
Data or AIS. When data fault is selected in the Interface
Configuration menu, the fault indicates a data stable condition. This
indicates the data is all 1s or 0s (i.e., data is not transitioning). When
AIS is selected, the alarm indicates the data is all 1s from customer
data input to the modem. When None is selected in the Interface
Configuration menu, the TX Data/AIS Fault/Alarm is not activated.
Note: AIS is an alarm, not a switching fault.
TX CLK PLL
Transmitter phase-locked loop fault. Indicates the transmitter
Phase-Locked Loop (PLL) is not locked.
TX CLK ACTIVITY
Activity detector alarm of the selected interface transmit clock.
The interface will fall back to the internal clock when this alarm
is active.
TX AUDIO 1 CLIP
Not Applicable.
TX AUDIO 2 CLIP
Not Applicable.
CONFIGURATION
TX interface configuration fault.
Indicates the TX interface cannot execute a programmed
configuration parameter.
3–25
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Operation
3.4.3.4
Revision 2
MN/SNM1002.OM
FAULTS AND ALARMS:RX INTERFACE
RX INTERFACE
--------BUFFER UNDERFLOW
Buffer underflow alarm. Indicates that a buffer underflow has
occurred.
BUFFER OVERFLOW
Buffer overflow alarm. Indicates that a buffer overflow has
occurred.
RX DATA/AIS
Data or AIS. When data fault is selected in the Configuration
Interface menu, the fault indicates a data stable condition. This
indicates the data coming from the satellite is all 1s or 0s (i.e.,
data is not transitioning). When AIS is selected, the Alarm
indicates the data is all 1s from the satellite. When None is
selected in the Configuration Interface menu, the RX Data/AIS
Fault/Alarm is not activated.
Note: AIS is an alarm, not a switching fault.
FRAME BER
Frame BER fault. Indicates that the frame BER exceeds 1-3.
BACKWARD ALARM
Not Applicable.
BUFFER CLK PLL
Buffer clock phase-locked loop fault. Indicates the buffer clock
PLL is not locked.
BUFFER CLK ACT
Activity detector alarm of the selected interface receive clock.
The interface will fall back to the satellite clock when this fault is
active.
DEMUX LOCK
DEMUX lock fault. Indicates that the DEMUX is not locked.
RX 2047 LOCK
RX 2047 lock alarm. Indicates the RX 2047 data pattern is not
locked.
Note: This alarm is only active if RX 2047 is ON.
BUFFER FULL
Buffer full alarm. Indicates the buffer is less than 10% or greater
than 90% full.
RX INSERT
Not Applicable.
RX AUDIO 1 CLIP
Not Applicable.
RX AUDIO 2 CLIP
Not Applicable.
CONFIGURATION
Configuration alarm.
3–26
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Operation
3.4.3.5
Revision 2
MN/SNM1002.OM
FAULTS AND ALARMS:COMMON
COMMON
---------
BATTERY/CLOCK
Battery or clock fault.
-12V SUPPLY
-12V power supply fault.
+12V SUPPLY
+12V power supply fault.
+5V SUPPLY
+5V power supply fault.
SELF TEST
Self Test Fault. Indicates a selt test fault if the transmitted signal
is not not received.
CONTROLLER
Controller fault. Typically indicates the controller has gone
through a power on/off cycle.
INTERFACE MODULE
Interface module fault. Typically indicates that the interface
module is missing or will not program.
3–27
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Operation
3.4.4
Revision 2
MN/SNM1002.OM
FUNCTION SELECT:STORED FLTS/ALMS
FUNCTION SELECT
STORED FLTS/ALAMS
The modem stores the first 10 (Flt0 through Flt9) occurrences of fault status changes in
each of the following major fault categories:
•
•
•
•
•
Modulator
Demodulator
Transmit Interface
Receive Interface
Common Equipment
Each fault status change is stored with the time and date of the occurrence of the fault.
Stored faults may be viewed by entering the stored faults level from the Select menu.
Stored faults are not maintained through controller power-on reset cycle. However, the
last known time is maintained in nonvolatile Random Access Memory (RAM). On
power-up, a common equipment fault is logged (Flt0) with that last known time and date.
In addition, on power-up, an additional common equipment fault is logged (Flt1) to
indicate the power-up time and date. The power-down and power-up times are logged as
common equipment fault 0 and common equipment fault 1, respectively.
On entering the stored faults level, press [←] or [→] to move between the fault groups
and the “Clear Stored Faults ?” selections. The time and date of the first stored fault
status (Flt0) for the selected group will be displayed alternately on line 2 of the display.
Press [↑] or [↓] to cycle through the selected group has stored fault status (Flt0 through
Flt9). To display the fault status associated with the displayed time and date, press
[ENTER]. To identify the fault, press [←] or [→] to move the flashing cursor. To clear
the currently logged stored faults, press [ENTER] when the “Clear Stored Faults/Yes?”
selection is displayed.
Note: Faults are stored in time sequence, with the oldest fault status change stored in
Flt0, and the most recent in Flt9. Only the first 10 fault status changes are stored. All
stored faults, which have not been used, indicate “No Fault” on the display.
3–28
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Operation
3.4.4.1
Revision 2
MN/SNM1002.OM
STORED FLTS/ALMS:MODULATOR
MODULATOR
X
STORED TIME/DATE
(FAULT LABEL)
--------IF Synthesizer
DATA CLOCK SYN
I CHANNEL
Q CHANNEL
AGC LEVEL
MODEM REF ACT
MODEM REF PLL
MODULE CONFIGURATION
3.4.4.2
STORED FLTS/ALMS:DEMODULATOR
DEMODULATOR
STORED TIME/DATE
X
(FAULT LABEL)
--------CARRIER DETECT
IF SYNTHESIZER
I CHANNEL
Q CHANNEL
BER THRESHOLD
MODEL
CONFIGURATION
3.4.4.3
STORED FLTS/ALMS:TX INTERFACE
3–29
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TX INTERFACE
STORED TIME/DATE
X
(FAULT LABEL)
--------TX DROP
TX DATA/AIS
TX CLK PLL
TX CLK ACTIVITY
TX AUDIO 1 CLIP
TX AUDIO 2 CLIP
CONFIGURATION
3.4.4.4
(Not Applicable)
(Not Applicable)
(Not Applicable)
STORED FLTS/ALMS:RX INTERFACE
3–30
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RX INTERFACE
STORED TIME/DATE
X
(FAULT LABEL)
--------BUFFER UNDERFLOW
BUFFER OVERFLOW
RX DATA/AIS
FRAME BER
BACKWARD ALARM
BUFFER CLK PLL
BUFER CLK ACT
DEMUX LOCK
RX 2047 LOCK
BUFFER FULL
RX INSERT
RX AUDIO 1 CLIP
RX AUDIO 2 CLIP
CONFIGURATION
3.4.4.5
(Not Applicable)
(Not Applicable)
(Not Applicable)
(Not Applicable)
STORED FLTS/ALMS:COMMON
3–31
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COMMON
X
STORED TIME/DATE
(FAULT LABEL)
--------BATTERY/CLOCK
-12 VOLT SUPPLY
+12 VOLT SUPPLY
+5 VOLT SUPPLY
SELF TEST
CONTROLLER
INTERFACE MODULE
3.4.4.6
STORED FLTS/ALMS:CLEAR
CLEAR ??
STORED FAULTS
3–32
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Operation
3.4.5
Revision 2
MN/SNM1002.OM
FUNCTION SELECT:UTILITY
FUNCTION SELECT
UTILITY
The Function Select Utility menu is divided into the following categories:
•
•
•
•
•
•
•
Modulator
Demodulator
Interface
Network
System
Modem Type
Factory Setup
The menu information includes:
•
•
•
•
•
•
•
•
•
•
•
Filter Types
Terrestrial Interface Types
Mod/Demod Types
Time/Date
Encoder/Decoder Types
Modem Types
Current Firmware
Test Mode Status
Overhead Type
Revision Emulation
Lamp Test
Provisions are also made for assigning data and code rates to the modulator and
demodulator.
After entering the Utility menu, press [←] or [→] to select the desired sub-menu, and
press [ENTER].
Notes:
1. The Utility Factory Setup menu is for Comtech EF Data service personnel only.
Entering this menu without authorization may cause the modem to operate
incorrectly.
2. Changes in the Utility menu may cause changes in other front panel menus.
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Revision 2
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UTILITY:MODULATOR
UTILITY
MODULATOR
3.4.5.1.1
MODULATOR: ASSIGN TRANSMIT FILTERS
ASSIGN
TRANSMIT FILTERS
Transmit code rate/type as follows:
TX-A QPSK 1/2 19.200 kbps
TX-B QPSK 1/2 19.200 kbps
TX-C QPSK 1/2 19.200 kbps
TX-D QPSK 1/2 19.200 kbps
TX-V QPSK 1/2 19.200 kbps
Upon entry, the current transmitter rate is displayed.
3.4.5.1.2
MODULATOR:MOD POWER OFFSET
MODEM POWER OFFSET
+ 0.0 DB
Modulator power offset adjust. Offsets the modulator output power readout in the
Configuration menu. This feature does not actually change the modulator power level, but
displays an offset value in the monitor.
The modulator power offset range is -99.9 to +99.9 dB, in 0.1 dB steps.
Note: Anything except 0.0 dB will cause ADJ to be displayed for the TX power level.
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Revision 2
MN/SNM1002.OM
MODULATOR:MODULATOR TYPE
MODULATOR TYPE
INTELSAT OPEN
Transmit filter type select. Select one of the following for network filtering:
Note: Change in EFD, ASYNC, or Custom modem types only.
INTELSAT OPEN
EFD CLOSED
CSC CLOSED
FDC CLOSED
SDM-51 COMPATIBLE
Notes:
1. TX filter type is selectable only when CUSTOM is selected for the modem type in
the Utility Modem Type menu.
2. Code Rate 3/4 is not compatible with a combination of a CSC CLOSED Modulator
Type and Sequential Encoder.
3.4.5.1.4
MODULATOR:ENCODER TYPE
ENCODER TYPE
VITERBI
Encoder type selection. Select VITERBI or SEQUENTIAL encoder type.
Notes:
1. Change in EFD, ASYNC, or Custom modem types only.
2. A Sequential Encoder Type and a 3/4 Code Rate combination is
not compatible with a CSC CLOSED Modulator Type.
Press[←], [→], [↑], or [↓] to move the flashing cursor. Press [ENTER] to execute the
change.
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Operation
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Revision 2
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MODULATOR:TX BPSK ORDERING
TX BPSK ORDERING
STANDARD
Transmit BPSK bit ordering selection. Select STANDARD or NON-STANDARD
Press[←], [→], [↑], or [↓] to move the flashing cursor. Press [ENTER] to execute the
change.
3.4.5.1.6
MODULATOR:MOD SPECTRUM
MOD SPECTRUM
NORMAL
Programmable vector rotation allows the operator to select NORMAL or INVERT for
spectrum reversal of the I and Q baseband channels.
Press[←], [→], [↑], or [↓] to move the flashing cursor. Press [ENTER] to execute the
change
3.4.5.1.7
MODULATOR:TX SYMBOL RATE
TX SYMBOL RATE
19.200 KSPS
Status only. Selects TX Symbol Data rate.
3.4.5.2
UTILITY:DEMODULATOR
UTILITY
DEMODULATOR
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Operation
3.4.5.2.1
Revision 2
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DEMODULATOR:ASSIGN RECEIVE FILTERS
ASSIGN
RECEIVE FILTERS
Receive code rate/type as follows:
RX-A QPSK 1/2 19.200 kbps
RX-B QPSK 1/2 19.200 kbps
RX-C QPSK 1/2 19.200 kbps
RX-D QPSK 1/2 19.200 kbps
RX-V QPSK 1/2 19.200 kbps
Upon entry, the current transmitter rate is displayed.
3.4.5.2.2
DEMODULATOR: DEMODULATOR TYPE
DEMODULATOR TYPE
INTELSAT OPEN
Transmit filter type select. Select one of the following for network filtering:
Note: Change in EFD, ASYNC, or Custom modem types only.
INTELSAT OPEN
EFD CLOSED
CSC CLOSED
FDC CLOSED
SDM-51 COMPATIBLE
Notes:
1. TX filter type is selectable only when CUSTOM is selected for the modem type in
the Utility Modem Type menu.
2. Code Rate 3/4 is not compatible with a combination of a CSC CLOSED
Modulator Type and Sequential Encoder.
3.4.5.2.3
DEMODULATOR:DECODER TYPE
DECODER TYPE
VITERBI
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Decoder type selection. Select VITERBI or SEQUENTIAL decoder type.
Notes:
1. Change in EFD, ASYNC, or Custom modem types only.
2. A Sequential Decoder Type and a 3/4 Code Rate combination is
not compatible with a CSC CLOSED Modulator Type.
Press[←], [→], [↑], or [↓] to move the flashing cursor. Press [ENTER] to execute the
change.
3.4.5.2.4
DEMODULATOR:RX BPSK ORDERING
RX BPSK ORDERING
STANDARD
Receive BPSK bit ordering selection. Select STANDARD or NON-STANDARD
Press[←], [→], [↑], or [↓] to move the flashing cursor. Press [ENTER] to execute the
change.
3.4.5.2.5
DEMODULATOR:DEMOD SPECTRUM
DEMOD SPECTRUM
NORMAL
Programmable vector rotation allows the operator to select NORMAL or INVERT for
spectrum reversal of the I and Q baseband channels.
Press[←], [→], [↑], or [↓] to move the flashing cursor. Press [ENTER] to execute the
change.
3.4.5.2.6
DEMODULATOR:RX SYMBOL RATE
RX SYMBOL RATE
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19.200 KSPS
Status only.
Selects RX Symbol Data rate, with 4.800 to 2500.000 ksps.
3.4.5.3
UTILITY:INTERFACE
UTILITY
INTERFACE
3.4.5.3.1
INTERFACE:TX OVERHEAD TYPE
TX OVERHEAD TYPE
NONE
Select None for TX overhead type.
Note: Overhead types are selectable only when Custom is selected for modem type in the
Utility Modem Type menu.
3.4.5.3.2
INTERFACE:RX OVERHEAD TYPE
RX OVERHEAD TYPE
NONE
Select None RX overhead type.
Note: Overhead types are selectable only when Custom is selected for modem type in the
Utility Modem Type menu.
3.4.5.3.3
INTERFACE:TX TERR INTERFACE
TX TERR INTERFACE
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RS422
Displays the TX interface type RS-232, RS-422, or V.35.
3.4.5.3.4
INTERFACE:RX TERR INTERFACE
RX TERR INTERFACE
RS422
Displays the RX interface type RS-232, RS-422, or V.35.
3.4.5.3.5
INTERFACE:BUFFER PROGRAM
BUFFER PROGRAM
BITS
Buffer unit program function. Select MILLI-SECONDS or BITS.
Note: To have the modem calculate the plesiochronous shift, set the buffer units to MILLISECONDS. For a specific buffer depth, set the buffer units to BITS.
3.4.5.3.6
INTERFACE:FRAMING STRUCTURE
FRAMING STRUCTURE
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Operation
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T1 FRAMING
STRUCTURE:
G.704
E1 FRAMING
STRUCTURE:
G.704
Displays the currently selected framing type and structure of the data. This function is used
with the buffer program in ms for plesiochronous buffer slips.
Upon entry, the framing type (T1 or E1) is displayed on Line 1. The framing structure of
each type (None or G.704) is displayed on Line 2. Press [←] or [→] and [↑] or [↓] to select
framing structure and type. Press [ENTER] to execute the change.
3.4.5.3.7
INTERFACE:RTS TX-IF CNTRL
RTS TX-IF CNTRL
OFF
Programs the modem to allow a Request To Send (RTS) signal to On or Off the output
when data is ready for transmission.
Press[←], [→], [↑], or [↓] to move the flashing cursor. Press [ENTER] to execute the
change.
3.4.5.3.8
INTERFACE:TX DATA PHASE
TX DATA PHASE
NORMAL
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TX data phase relationship. Use this option to select NORMAL or INVERT for the TX
data relationship to the selected TX clock.
Upon entry, press [↑] or [↓] to make the selection. Press [ENTER] to execute the change.
3.4.5.3.9
INTERFACE:RX DATA PHASE
RX DATA PHASE
NORMAL
RX data phase relationship. Use this option to select NORMAL or INVERT for the RX
data relationship to the selected RX clock.
Upon entry, press [↑] or [↓] to make the selection. Press [ENTER] to execute the change.
3.4.5.3.10
INTERFACE:CTS DELAY
CTS DELAY
X SECONDS
Sets the delay in seconds (0 to 60) for the Clear To Send (CTS) signal.
Default: 0 Seconds.
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Operation
3.4.5.4
Revision 2
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UTILITY:SYSTEM
UTILITY
SYSTEM
3.4.5.4.1
SYSTEM:TIME/DATE
TIME: 12:00:00AM
DATE: 7/04/1976
Time of day and date display/set function.
The current time and date in the modem’s memory are displayed when selected.
To change the modem time and/or date, press [ENTER].
•
•
•
3.4.5.4.2
Press [←] or [→] to position the cursor over the parameter to be changed.
Press [↑] or [↓] to change the parameter.
Once the parameters are displayed as desired, press [ENTER] to set the time and
date.
SYSTEM:REMOTE BAUD RATE
REMOTE BAUD RATE
19.200 BPS NONE
The parity and baud rate settings of the modem are displayed.
To change the modem parity, press [ENTER].
• Press [←] or [→] to position the cursor over the parameter to be changed.
• Press [↑] or [↓] to change the parameter.
• Once the parameters are displayed as desired, press [ENTER] to set the baud rate
and parity.
• The parity can be set to EVEN, ODD, or NONE.
The baud rate is 19200 bit/s.
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Operation
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Revision 2
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SYSTEM:REMOTE ADDRESS
REMOTE ADDRESS
1
The current modem address is displayed (1 to 255).
Note: 0 is reserved as a global address.
To change the remote address, press [ENTER]. Press [↑] or [↓] to make the selection. Press
[ENTER] to execute the change.
3.4.5.4.4
SYSTEM:REMOTE TYPE
REMOTE TYPE
RS-232
Select RS-485 (2-Wire), RS-485 (4-Wire), or RS-232.
3.4.5.4.5
SYSTEM:OPERATION MODE
OPERATION MODE
DUPLEX
Programs the modem for DUPLEX, TRANSMIT ONLY, or RECEIVE ONLY operation.
Upon entry, the operational status may be changed. Press [↑] or [↓] to make the selection.
Press [ENTER] to execute the change.
Note: When TRANSMIT ONLY or RECEIVE ONLY are selected, the appropriate faults
are masked from the Faults and Stored Faults menus.
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Operation
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SYSTEM:YEAR DISPLAY
YEAR DISPLAY
2 - DIGIT
Selects the display for the year in either 2-digit or 4-digit format.
Upon entry, the year display may be changed. Press [↑] or [↓] to make the selection. Press
[ENTER] to execute the change
3.4.5.4.7
SYSTEM:TEST MODE STATUS
TEST MODE STATUS
--------Test mode status indicator. The following modem test points are listed and display a “+”
when a test mode is active:
•
•
•
•
•
•
•
•
RS CORR OFF
INTRFC LOOP BACK
B-BAND LOOP BACK
RF LOOP BACK
IF LOOP BACK
CARRIER MODE
RX 2047 PATTERN
TX 2047 PATTERN
To view the test modes, press [ENTER]. Press [↑] or [↓] to make the selection.
3.4.5.4.8
SYSTEM:LAMP TEST ??
LAMP TEST ??
PRESS ENTER
Lamp test function. Press [ENTER] to turn the front panel indicators on for 3 seconds.
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Operation
3.4.5.4.9
Revision 2
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SYSTEM:SELF TEST
SELF TEST
AUTO
Select OFF, AUTO, or RUN. After completion of the test, SELF TEST (“PASSED” or
“FAILED”) is displayed.
•
•
•
3.4.5.4.10
OFF bypasses built-in self test
AUTO initiates built-in self test when turning on modem
RUN initializes self test
SYSTEM:DISPLAY CONTRAST
DISPLAY CONTRAST
LEVEL:
64
Sets the contrast setting of the Front Panel menu.
Press [ENTER] to begin. Press [↑] or [↓] to increment or decrement the number at the
flashing cursor, from 0 to 100. Press [ENTER] to execute the change.
3.4.5.4.11
SYSTEM:M&C FIRMWARE
M&C FIRWARE
FW/NNNNNN-DDR
Displays the M&C module firmware version. The display includes the month, day, and
year.
3.4.5.4.12
SYSTEM:BOOT FIRMWARE
BOOT FIRWARE
FW/NNNNNN-DDR
Displays the boot module firmware version. The display includes the month, day, and year
3.4.5.4.13
SYSTEM:FPGA FIRMWARE
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FPGA FIRWARE
FW/NNNNNN-DDR
Displays the FPGA module firmware version.
The display includes the month, day, and year.
3.4.5.4.14
SYSTEM:DEMO MODE
DEMO MODE
OFF
Turn all FAST features ON that are installed in the modem for 60 minutes.
During this time period, the operator is encouraged to implement the features
and discover the capablilites of the different options. After the 60-minute
time limit, the modem resets to its previous configuration.
3.4.5.4.15
SYSTEM:EXT AGC: MAX PWR
EXT AGC: MAX PWR
0.0 VOLTS
Sets the AGC voltage for a receive signal level of -60.0 dBm. The voltage range is 0.0 to
10.0V, in 0.5V steps.
Upon entry, the current external AGC voltage level is displayed. Press [↑] or [↓] to
increment or decrement the AGC voltage level in 0.5V steps. Press [ENTER] to execute the
change.
Note: For any receive signal level between -25.0 and -60.0 dBm, the software will
interpolate the required AGC voltage.
3.4.5.4.16
SYSTEM:EXT AGC: MIN PWR
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EXT AGC: MIN PWR
10.0 VOLTS
Sets the AGC voltage for a receive signal level of -25.0 dBm. The voltage range is 0.0 to
10.0V, in 0.5V steps.
Upon entry, the current external AGC voltage level is displayed. Press [↑] or [↓] to
increment or decrement the AGC voltage level in 0.5V steps. Press [ENTER] to execute the
change.
Note: For any receive signal level between -25.0 and -60.0 dBm, the software will
interpolate the required AGC voltage.
3.4.5.4.17
SYSTEM:MASTER RESET
MASTER RESET
HARD/SOFT
Initiating a hard reset will reset the modem and place the
default configuration settings in ROM. Initiating a soft reset
will reset the modem hardware, but saves the current
configuration settings.
CAUTION
Select [ENTER] once to access HARD or SOFT.
Press [←] or [→] to make the selection. Press [ENTER].
Press [→] five times to move the cursor to YES. Select YES and press [ENTER] again.
Note: The following parameters do not revert to default settings after a hard reset:
•
•
•
•
•
•
•
3.4.5.5
Address
Parity
Baud Rate
Remote Type
Ext AGC: Min Pwr
Ext AGC: Max Pwr
Display Contrast
UTILITY:MODEM TYPE
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UTILITY
MODEM TYPE
3.4.5.5.1
MODEM TYPE:MODEM TYPE
MODEM TYPE
CUSTOM
Selects the following types of modem operation:
•
•
CUSTOM
EFD
Selections are made from the Front Panel menu
Closed Network Operation
When the modem is changed from one type of operation to another, the modem will be
reset to the default configurations of the new modem type. The RF-IF Output must be
turned on to get the modem to lock.
•
•
•
•
If the existing modem type is the same as the type entered, the modem will not
change any parameters.
If the modem type is changed to Custom, no parameters will be changed.
If the modem will not allow the modem type selection, that type of operation
may not be an available option.
Select MODEM OPTIONS and OVERHEAD OPTIONS to see which modem
operations are allowed.
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Operation
3.4.5.5.2
Revision 2
MN/SNM1002.OM
MODEM TYPE:MODEM EMULATION
MODEM EMULATION
DISABLED
Selects the following types of modem emulation:
SDM-100
SDM-300
SDM-308-4
SDM-308-4
SDM-308-4
SDM-308-4
SDM-309
SDM-650
SDM-650
SDM-6000
VER:
15.7.1
6.2.2
4.03
6.05
6.08
7.03
6.04
4.12A
4.16
5.1.1
or Disabled
Upon entry, the current modem emulation is displayed. Press [↑] or [↓] to change the
display. Press [ENTER] to execute the change.
3.4.5.5.3
MODEM TYPE:REVISION EMULATION
REV EMULATION
CURRENT VERSION
Programs an emulation mode of a previous functional revision. This allows the user to
select the CURRENT VERSION or FUNCTIONAL X.
Note: The number displayed in the CURRENT VERSION position increases with each
software version change.
Upon entry, the CURRENT VERSION is displayed. Press [↑] or [↓] to select the
FUNCTIONAL version. Press [ENTER] to execute the change.
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Notes:
1. Programming a current version (default) allows all features and options (if
installed) to operate normally.
2. Programming a FUNCTIONAL version (X) eliminates any changes that affect
the later version. Only functional changes are affected by the revision emulation
feature.
3. A correction change (e.g., VER 3.1.2) remains fixed in accordance with the latest
version. Since the revision emulation default is the current version, program the
functional version at the start of each operation.
4. The revision emulation feature does not affect some interface changes for the
direct operation of the modem (Configuration save/recall, test mode screen in the
Utility/System, all factory setup modes, etc.).
3.4.5.5.4
MODEM TYPE:MODEM OPTIONS
MODEM OPTIONS
--------------
Displays the installed modem options.
If the option is installed, a “+” symbol is displayed. To view the available options press
[ENTER]. Observe for the flashing cursor. Press the [←] [→] arrows to move from one
symbol to the next. The first line will display the option. The second line will display the
status:
HIGH POWER
HIGH STABILITY
ASLT
VITERBI
SEQUENTIAL
SINGLE RATE
LOW RATE VAR
FULL RATE VAR
CARD #1 PCB
CARD #2 PCB
CARD #3 PCB
8PSK 2/3
TX ONLY
RX ONLY
(0)
(0)
(-)
(+)
(-)
(-)
(-)
(+)
(x)
(x)
(x)
(-)
(-)
(-)
3–51
0 = Not Installed, Not Upgradeable
- = Not Installed
+ = Installed
X = Not Installed, Field Upgradeable
SNM-1002 LinkSync Modem
Operation
Revision 2
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3.4.5.5.5
MODEM TYPE:CARD #1 TYPE (NOT INSTALLED)
3.4.5.5.6
MODEM TYPE:CARD #2 TYPE (NOT INSTALLED)
3.4.5.5.7
MODEM TYPE:CARD #3 TYPE (NOT INSTALLED)
3.4.5.5.8
MODEM TYPE:LOCAL MODEM AUPC
LOCAL MODEM AUPC
OFF
Configures the modem for the self-monitoring Local Modem AUPC mode and for local TX
power control (self-monitoring) due to severe rain fade.
Notes:
1. The self-monitoring Local Modem AUPC mode is not used when the
ASYNC/AUPC is selected as the Modem Type.
2. Used for local control (self-monitoring) due to severe rain fade.
3.4.5.5.9
MODEM TYPE:MODEM SERIAL
MODEM SERIAL
123456789
Status Only
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Operation
3.4.5.5.10
Revision 2
MN/SNM1002.OM
MODEM TYPE:CONFIGURATION CODE - MODEM
CONFIGURATION
CODE - MODEM
1) AAAAAAAAAA
2) AAAAAAAAAA
If installed, Status Only
Comtech EF Data supplied code.
.
3.4.5.6
UTILITY:FACTORY SETUP (NOT APPLICABLE)
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This page is intentionally left blank.
3–54
Chapter 4. THEORY OF
OPERATION
4.1
LinkSync™
LinkSync™ is a unique MIDAS feature providing:
• Automatic Frequency Control (AFC)
• Uplink Power Control (UPC) at the MIDAS Controller
• Circuit Power Management (Option)
! Site level call blocking based on HPA power
4.1.1
Automatic Frequency Control
MIDAS provides automatic frequency control (AFC) to reduce the traffic modem
acquisition time for continuous mode operation and to improve the burst acquisition
performance of the SNM-1000/1001 Network Control Modem and the Node Control
Modems1, by keeping the frequency drift to within ± 500 Hz.
The outbound control channel is used as the system-wide reference, which is
continuously monitored by the LinkSync™ Modem at the MIDAS Controller site and all
the Node Control Modems2. The AFC process does not depend on the absolute accuracy
in any part of the system.
1
Includes SNM-1000 and the integrated traffic/control modems (SNM-1010 and SNM-1010L).
2
The integrated traffic/control modems and the network terminals in a standard configuration
monitor the outbound control channel in the “control mode”.
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Theory of Operation
Revision 2
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The AFC process consists of three steps:
1. Removing the receive offset of the Network Control Modem at the MIDAS
Controller.
2. Removing the receive offset of the Node Control Modems and the traffic
modems at the traffic sites.
2. Removing the transmit offset of the Node Control Modems and the traffic
modems at the traffic sites.
These three steps are performed as follows:
1. The LinkSync™ Modem measures the receive frequency of the outbound
control channel and provides this information to the MIDAS Controller
periodically, the period being user-configurable. The MIDAS Controller then
calculates the offset from the nominal, which is used to correct the Network
Control Modem’s TX frequency.
2. The Node Control Modem determines the receive offset by measuring the
receive frequency of the outbound control channel.
a. This offset is used to calibrate the RX frequency of the Node Control
Modem and all the traffic modems (during call setup) at the node.
b. The traffic modems that have active calls are not adjusted. Calibrations
are periodically performed where the period is user –configurable.
3. MIDAS Controller periodically polls a Node Control Modem to transmit
exclusively, and measures the receive frequency for the incoming bursts from
the Node Control Modem on the inbound control channel.
a. It then estimates the offset and provides this information to the Node
Control Modem.
b. The Node Control Modem then applies this offset to correct its TX
frequency and that of all the traffic modems (during call setup).
c. The traffic modems that have active calls are not adjusted. This process
is repeated periodically, the period being user-configurable.
4–2
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Theory of Operation
4.1.2
Revision 2
MN/SNM1002.OM
Uplink Power Control
Uplink Power Control at the MIDAS Controller site compensates for outbound control
channel uplink degradation so that it always downlinks at a constant power at the
satellite.
A reference Eb/No is calculated for the received outbound control channel at the MIDAS
Controller site for clear sky conditions. The LinkSync™ Modem, at the MIDAS
Controller site, measures the received outbound control channel Eb/No on a continuous
basis.
4.1.3
•
If the measured Eb/No differs from the calculated reference, the MIDAS
Controller calculates the offset to be applied to the transmit power level of the
outbound control channel to achieve the desired reference Eb/No.
•
The transmit power is adjusted only when the difference exceeds a threshold,
which is configurable.
Circuit Power Management (Option)
Circuit power management is provided as an option. It includes:
•
•
4.1.3.1
Circuits at setup.
Site level call blocking based on available High power Amplifiers (HPA) power.
Site Level Call Blocking
The MIDAS Controller supports dynamic site level call blocking based on the available
HPA power. The MIDAS Controller keeps track of the HPA power for each site. A call
originating from a site is blocked if it would cause the total transmit power for that site to
exceed the recommended HPA power (less backoff). This leads to improved system
stability.
4.2
Monitor and Control (M&C)
The M&C monitors the modem and provides configuration updates to other modems
within the modem when necessary.
The modem configuration parameters are maintained in battery-backed RAM, which
provides total recovery after power-down situation. The M&C functions include
extensive fault and status reporting. All modem functions are accessible through a remote
communications interface. A block diagram of the M&C is shown in Figure 4-1.
4–3
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Theory of Operation
4.2.1
Revision 2
MN/SNM1002.OM
Theory of Operation
The M&C card is composed of the following subsections:
•
•
•
•
•
•
•
•
Microcontroller with Universal Asynchronous Receiver/Transmitter (UART)
Digital-to-Analog Converter (DAC)
Read Only Memory (ROM)
Analog-to-Digital Converter (ADC)
Read Access Memory (RAM)
Universal ASYNC
User Interface
Fault and Alarm Relays
FAULT
AND ALARM
RELAYS
MODEM
11 MHz
CLOCK
ROM
(M&C,
BULK,
BOOT)
2
DAC
I C BUS
MICROCONTROLLER
RAM AND
REAL
TIME
CLOCK
ADC
EIA-232
OR
EIA-485
9-PIN
REMOTE
Figure 4-1. M&C Block Diagram
4–4
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Theory of Operation
Revision 2
MN/SNM1002.OM
The heart of the M&C card is the Dallas 80C310 microcontroller operating at 11 MHz.
This microcontroller contains 256 kbytes of internal RAM. The ROM at U8 is 29F040
(512 kbytes).
ROM access times must be equal to or greater than 150 ns. The RAM can be 8 or
32 kbytes in size. This RAM chip is internally battery-backed and contains a real time
clock used by the M&C.
The non-volatile RAM on the M&C module allows the module to retain configuration
information without prime power for 1 year (approximately). If the modem is powered
down, the following sequence is carried out by the M&C microcontroller.
1. When power is applied to the M&C, the microcontroller checks the non-volatile
memory to see if valid data has been retained. If valid data has been retained, the
modem is reconfigured to the parameters maintained by the RAM.
2. If the non-volatile memory fails the valid data test, a default configuration from
ROM is loaded into the system.
The UART supports serial ASYNC communications channels (remote port) with a data
rate of 19200 bit/s. The UART is a built-in peripheral of the microcontroller. The
communications type is EIA-232.
The DAC supplies a voltage that controls the contrast of the display. The ADC monitors
all the voltages from the power supply. The DAC and ADC are mapped to the
microcontroller with an Integrated Circuit (IC) bus.
All functions are memory-mapped to the micro-controller.
4.3
Modulator
The modulator provides PSK modulated carriers within the 50 to 180 MHz range. The
types of modulation that encode the transmitted baseband data from the interface PCB
are:
•
•
BPSK
QPSK
Refer to Section 4.2.3 for a description of each modulation type.
A block diagram of the modulator is shown in Figure 4-2.
4–5
SNM-1002 LinkSync Modem
Theory of Operation
Revision 2
MN/SNM1002.OM
SCT
PLL
OPTIONAL
SCT
MONITOR
&
CONTROL
CONVOLUTIONAL
ENCODER
REFERENCE
LO
BPF
DIGITAL
SIGNAL
PROCESSING
BPF
POWER LEVEL
CONTROL
LPF
RF
OUTPUT
RF LOOPBACK
OUTPUT
Figure 4-2. Modulator Block Diagram
4–6
SNM-1002 LinkSync Modem
Theory of Operation
4.3.1
Revision 2
MN/SNM1002.OM
Modulator Specifications
Refer to Table 4-1 for modulator specifications.
Table 4-1. Modulator Specifications
Parameter
Modulation Types
Data Rate Range
Symbol Rate Range
Test Modes
Frequency Range
Frequency Select Method
Frequency Step Size
Frequency Stability
Phase Error
Filtering Type
Spectral Occupancy
Spurious and Harmonics
Output Power Level Range
Output Stability
Output Power Adjustment
Output Impedance
Output Return Loss
Scrambler Type
Differential Encoding
FEC Convolution Encoding/
Viterbi or Sequential Encoding
Filter Masks
I/O Connector
Reported Faults
Specification
BPSK
QPSK
2.4 kbit/s to 1.25 Mbit/s
1/2 Rate BPSK
4.8 kbit/s to 2.5 Mbit/s
1/2 Rate QPSK
7.2 kbit/s to 3.75 Mbit/s
3/4 Rate QPSK
8.4 kbit/s to 4.375 Mbit/s
7/8 Rate QPSK
4.8 ks/s to 2.5 Ms/s
Carrier Null and Quadrature (Dual and Offset)
50 to 180 MHz
Synthesized
1 Hz
± 10 PPM oscillator
2.5° maximum
Nyquist, pre-equalized
Spectral density is -30 dB at ± 0.75 symbol rate
-55 dBc, 0 to 500 MHz
-5 to -30 dBm, ± 0.5 dB
± 0.5 dB
0.1 dB step size
75Ω
20 dB minimum
INTELSAT V.35
2-phase or none
Rate 1/2, 3/4, 7/8
EFD Closed
BNC 75Ω (TX IF)
AGC Level
IF Synthesizer
I Channel Filter Activity
Q Channel Filter Activity
Modem Reference Activity
Data Clock Syn
Module
Modem Reference PLL
4–7
SNM-1002 LinkSync Modem
Theory of Operation
4.3.2
Revision 2
MN/SNM1002.OM
Theory of Operation
The modulator is composed of eight basic subsections. These subsections are divided into
the baseband processing section and the RF section of the modulator. The modulator
controls all programmable functions on this module. Fault information from the
modulator is sent to the M&C. Refer to Chapter 5 for a list of reported faults.
The major modulator subsections are:
•
•
•
•
•
•
•
•
Scrambler/Differential Encoder
Convolutional Encoder
Programmable Vector Rotation
I/Q Nyquist Filters
Modulator
RF Synthesizer
Output Amplifier
Output Level Control
The data is sent to the scrambler for energy dispersal, and then to the differential encoder.
The differential encoder is a 2-bit encoder which allows for resolution of two of the four
ambiguity states of the QPSK demodulator.
The data is sent to the convolutional encoder for encoding the baseband data. The code
rates 1/2, 3/4, and 7/8 are based on the symbol rate range of 2.4 kbit/s to 2.5 Mbit/s. For
Viterbi codes, the convolutional encoder encodes the data at 1/2 rate. If the selected code
rate is 3/4, then 2 of every 6 symbols are punctured. For 3 bits in, there are 4 symbols out.
After the convolutional encoder, the data is sent to a programmable vector rotation
circuit. This feature provides the user with data communications compatibility for
spectrum reversal of the I and Q channels before and after satellite transmission.
The I and Q channel data then pass through a set of variable rate digital Nyquist filters.
4–8
SNM-1002 LinkSync Modem
Theory of Operation
Revision 2
MN/SNM1002.OM
The two identical digital Nyquist filters are followed by Direct Digital Modulation.
Symbol rates up to 2.5 Mbit/s can be achieved automatically.
The modulated carrier is applied to the RF section for conversion to the correct output
frequency. The spectral shape will be identical to that of the input data streams, but
double-sided about the carrier frequency.
The RF synthesizer provides the proper frequencies to convert the modulator IF to the
desired output frequency in the 50 to 180 MHz range. The synthesizer has a single loop,
and incorporates a Direct Digital Synthesis (DDS) chip to accommodate 1 Hz steps over a
range of 130 MHz. The RF section has a frequency stability of ± 1 x 10-5. An optional
2 x 10-7 Temperature Compensated Crystal Oscillator (TCXO) can be installed.
The signal is sent to the output amplifier. The amplifier takes the low level signal from
the modulator section and amplifies the signal to the proper level for output from the
module. The amplifier circuitry provides programmable control of the output level over a
range of -5 to -30 dB, in 0.1 dB steps. The amplifier has power leveling of ± 0.5 dB to
maintain the stability of the output level over time and temperature.
4.3.3
Theory of Modulation Types
The modulation types for the modem include BPSK or QPSK.
The PSK data transmission encoding method uses the phase modulation technique. This
method varies the phase angle of the carrier wave to represent a different bit value for the
receiver. The higher levels of modulation are required for an operating range that has a
limited bandwidth.
The order of modulation is represented by mPSK, where “m” relates to the number of
discrete phase angles. Refer to the following list for a brief description of the modulation
types.
•
•
BPSK: 2 discrete phase angles represent the 2 possible states of a symbol.
QPSK: 4 discrete phase angles represent the 4 possible states of a symbol.
Note: The code rate determines the number of symbols per bit.
4–9
SNM-1002 LinkSync Modem
Theory of Operation
4.3.3.1
Revision 2
MN/SNM1002.OM
BPSK Encoding
The modulator converts transmitted baseband data into a modulated BPSK carrier at
2.4 kbit/s to 1.25 Mbit/s (1/2 rate). Using vector analysis of the constellation pattern,
BPSK represents one symbol with the carrier phase either at 0° or 180°. The 1/2 rate
encoding at the convolutional encoder provides two symbols output for every bit input.
Code Rate
1/2
4.3.3.2
Symbols/Bit
2
Bits/Hz
0.5
QPSK Encoding
The modulator converts transmitted baseband data into a modulated QPSK carrier at the
following parameters:
•
•
•
4.8 kbit/s to 2.5 Mbit/s (1/2 rate)
7.2 kbit/s to 3.75 Mbit/s (3/4 rate)
8.4 kbit/s to 4.375 Mbit/s (7/8 rate)
Using vector analysis of the constellation pattern, QPSK represents a symbol with the
carrier phase angle at 45°, 135°, 225°, or 315°. The 1/2, 3/4, and 7/8 rates encoded at the
convolutional encoder provide the desired input/output bit rates.
Code Rate
1/2
3/4
7/8
Symbols/Bit
2
1.5
1.143
4–10
Bits/Hz
1
1.33
1.75
SNM-1002 LinkSync Modem
Theory of Operation
4.4
Revision 2
MN/SNM1002.OM
Demodulator
A block diagram of the demodulator is shown in Figure 4-3.
The demodulator converts PSK modulated carriers within the 50 to 180 MHz range to a
demodulated baseband data stream. The converted modulation types are BPSK and
QPSK (refer to Section 4.2.3 for a description of modulation types). The demodulator
then performs FEC on the data stream using Viterbi decoding algorithms.
LOOPBACK
RF INPUT
SWITCH
AGC
LPF
BPF
BPF
RF INPUT
50 TO 180 MHz
LO #1
REF
VCXO
OC XO
OPT
HIGH
STABILITY
A TO D
CONVERTER
LO #2
REFERENCE
REF
PLL
DIGITAL
SIGNAL
PROCESSING
VITERBI
DECODER
DIGITAL
CLOCK
RECOVERYLOOP
EXT REFERENCE
DOPPLER/
PLESIOCHRONOUS
BUFFER
Figure 4-3. Demodulator Block Diagram
4–11
INTERFACE
SNM-1002 LinkSync Modem
Theory of Operation
4.4.1
Revision 2
MN/SNM1002.OM
Demodulator Specifications
Refer to Table 4-2 for demodulator specification.
Table 4-2. Demodulator Specification
Parameter
Demodulation Types
Data Rate Range
Symbol Rate Range
IF Frequency
Input Level
Decoding Type
Filter Masks
Descrambler Type
Reported Faults
Specification
BPSK, QPSK
2.4 kbit/s to 1.25 Mbit/s
4.8 kbit/s to 2.5 Mbit/s
7.2 kbit/s to 3.75 Mbit/s
8.4 kbit/s to 4.375 Mbit/s
4.8 ks/s to 2.5 Ms/s
50 to 180 MHz, in 1 Hz steps
-30 to -55 dBm
Viterbi: 1/2, 3/4, 7/8
EFD Closed net
V.35
Carrier Detect
IF Synthesizer
BER Threshold
RX Clock Syn
Module
I Channel
Q Channel
4–12
1/2 Rate BPSK
1/2 Rate QPSK
3/4 Rate QPSK
7/8 Rate QPSK
SNM-1002 LinkSync Modem
Theory of Operation
4.4.2
Revision 2
MN/SNM1002.OM
Theory of Operation
The demodulator functions as an advanced, digital, coherent-phase-lock receiver and
decoder. Demodulator faults are also reported to the front panel. The demodulator
consists of the following basic subsections.
•
•
•
•
•
•
•
•
•
•
Digital Costas Loop
RF Section
Automatic Gain Control
Analog-to-Digital (A/D) Converter
Soft Decision Mapping
Programmable Vector Rotation
Digital Nyquist Filters
FEC Decoder
Digital Clock Recovery Loop
Decoder
The modulated IF signal at 50 to 180 MHz enters the RF module for conversion to an IF
frequency. The IF is then sampled by an A to D converter and digitally demodulated. The
I and Q data is then sent to the digital Nyquist filters, resulting in a filtered, digital
representation of the received signal. The digital data is then sent to four separate circuits:
•
•
•
•
Automatic Gain Control
Carrier Recovery (Costas) Loop
Clock Recovery Loop
Soft Decision Mapping
The AGC provides a gain feedback signal to the RF section. This closed loop control
ensures that the digital representation of the I and Q channels is optimized for the Costas
and Clock loops, as well as the soft-decision mapping circuitry.
When the active decoder determines that the modem is locked, the M&C stops the sweep
and begins the de-stress process. This involves fine tuning the DDS based on the phase
error in the Costas loop. The de-stress process continues as long as the modem is locked.
If the carrier is interrupted, the M&C resumes the sweep process.
The digital Costas loop, in conjunction with a Direct Digital Synthesizer (DDS), performs
the carrier recovery function. The Costas loop consists of a Costas phase detector, loop
filter, and DDS, all implemented digitally. The DDS performs the function of a
Voltage-Controlled Oscillator (VCO) in an analog implementation, but can be easily
programmed to the desired center frequency via the M&C. The output of the DDS is sent
to the RF module and provides the reference to which the local oscillator is locked. The
M&C sweeps the local oscillator (via DDS programming) through the user-specified
sweep range.
The digital clock loop, in conjunction with another DDS, performs the clock recovery
function. The clock loop consists of a phase detector, loop filter, and DDS, all
4–13
SNM-1002 LinkSync Modem
Theory of Operation
Revision 2
MN/SNM1002.OM
implemented digitally. The DDS performs the function of a VCO in an analog
implementation. The recovered data and symbol clocks are then used throughout the
demodulator.
The soft decision mapper converts the digital I and Q data to 3-bit soft decision values.
These values are then fed to the programmable vector rotation circuit, providing
compatibility with spectrum reversal of the I and Q channels.
The output of the vector rotation circuit is then sent to the Viterbi decoder.
4–14
Chapter 5.
MAINTENANCE
This chapter provides the following information:
•
•
•
5.1
System checkout
Fault isolation
Module replacement and identification
System Checkout
CAUTION
This equipment contains parts and assemblies sensitive to damage by ESD.
Use ESD precautionary procedures when touching, removing, or inserting
PCBs.
The modem comes equipped with an internal self-test feature. This feature is designed to
provide the operator with maximum confidence that the modem is fully operational
without installing external equipment.
A 2047 pattern is generated by the modem and routed through all sections. This is
accomplished by placing the modem in IF and baseband loopbacks. Pseudo Gaussian
noise is introduced to the modulated IF section allowing the modem to check its indicated
Eb/N0 against the known Eb/N0 of the demodulated input. Observe the following:
•
If this measurement falls outside of a specified window, the modem declares a
failed test.
•
Faults, if any, are stored in the Stored Fault menu.
5–1
SNM-1002 LinkSync Modem
Maintenance
5.1.1
Revision 2
MN/SNM1002.OM
Interface Checkout
Use the following procedure and the test setup in Figure 5-1 to inspect the interface.
Figure 5-1. Fault Isolation Test Setup
1. Connect a BER test set to the appropriate modem data connector as shown in
Figure 5-1. Refer to Chapter 2 for external modem connections.
2. Set up the modem for baseband loopback operation by using the directions
provided in section A.3.3. The modem will run error free.
3. Change the modem from baseband loopback to interface loopback operation by
using the directions provided in section A.3.3. The modem will run error free.
5–2
SNM-1002 LinkSync Modem
Maintenance
5.1.2
Revision 2
MN/SNM1002.OM
Modulator Checkout
Use the following procedure to check out the modulator:
1. Set up the equipment as shown in Figure 5-1. Refer to Chapter 4 for modulator
specifications.
2. Set up the modem for operation by using the directions provided in section A.3.
3. Clear all TX faults by correct use of data and clock selection (Chapter 4).
4. Measure the Eb/N0 with a receiver that is known to be operating properly. Refer
to Table 5-1 and Figure 5-2 to check for proper Eb/N0 level. The (S+N)/N is
measured by taking the average level of the noise and the average level of the
modem spectrum top. Use this measurement for the first column on Table 5-1.
Read across the page to find the S/N and Eb/N0 for the specific code rate.
Once the demodulator has locked to the incoming signal, the terminal will
display signal level, raw BER, corrected BER, and Eb/N0. Refer to Chapter 1 for
examples of BER performance curves.
5. Connect a spectrum analyzer to the modem as shown in Figure 5-1. Ensure the IF
output meets the appropriate mask and spurious specifications. Measure the
power output at different levels and frequencies.
A typical output spectrum is shown in Figure 5-3.
6. To check the frequency and phase modulation accuracy:
a. Set the modem to the continuous wave Normal mode by using the directions
in section A.3.1. This sets the Carrier mode in the off condition. A pure
carrier should now be present at the IF output. This should only be used for
frequency measurements. In this mode, spurious and power measurements
will be inaccurate.
b. Set the modem to the continuous wave Offset mode by using directions in
section A.3.1. This generates a single, upper side band suppressed carrier
signal. Ensure the carrier and side-band suppression is < 35 dBc.
5–3
SNM-1002 LinkSync Modem
Maintenance
Revision 2
MN/SNM1002.OM
Table 5-1. Conversion to S/N and Eb/N0 Chart
(dB)
(S+N)/N
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
15.0
15.5
16.0
16.5
17.0
17.5
18.0
18.5
19.0
19.5
20.0
Code
S/N
1.8
2.6
3.3
4.1
4.7
5.4
6.0
6.6
7.3
7.8
8.4
9.0
9.5
10.1
10.6
11.2
11.7
12.2
12.8
13.3
13.8
14.3
14.9
15.4
15.9
16.4
16.9
17.4
17.9
18.4
18.9
19.5
20.0
Rate 1/2
Eb/N0
1.8
2.6
3.3
4.1
4.7
5.4
6.0
6.6
7.3
7.8
8.4
9.0
9.5
10.1
10.6
11.2
11.7
12.2
12.8
13.3
13.8
14.3
14.9
15.4
15.9
16.4
16.9
17.4
17.9
18.4
18.9
19.5
20.0
Code
S/N
1.8
2.6
3.3
4.1
4.7
5.4
6.0
6.6
7.3
7.8
8.4
9.0
9.5
10.1
10.6
11.2
11.7
12.2
12.8
13.3
13.8
14.3
14.9
15.4
15.9
16.4
16.9
17.4
17.9
18.4
18.9
19.5
20.0
5–4
Rate 3/4
Eb/N0
0.0
0.8
1.6
2.3
3.0
3.6
4.3
4.9
5.5
6.1
6.7
7.2
7.8
8.3
8.9
9.4
10.0
10.5
11.0
11.5
12.1
12.6
13.1
13.6
14.1
14.6
15.2
15.7
16.2
16.7
17.2
17.7
18.2
Code
S/N
1.8
2.6
3.3
4.1
4.7
5.4
6.0
6.6
7.3
7.8
8.4
9.0
9.5
10.1
10.6
11.2
11.7
12.2
12.8
13.3
13.8
14.3
14.9
15.4
15.9
16.4
16.9
17.4
17.9
18.4
18.9
19.5
20.0
Rate 7/8
Eb/N0
-0.6
0.2
0.9
1.6
2.3
3.0
3.6
4.2
4.8
5.4
6.0
6.6
7.1
7.7
8.2
8.8
9.3
9.8
10.3
10.9
11.4
11.9
12.4
12.9
13.5
14.0
14.5
15.0
15.5
16.0
16.5
17.0
17.5
SNM-1002 LinkSync Modem
Maintenance
Revision 2
MN/SNM1002.OM
RL -49.00 dBm
ATTEN 10 dB
2.00 dB/DIV
RES BANDWIDTH
10.0 kHz
Modem Rate = 2144 kbit/s, 3/4 Rate Coding
with 7.7 dB Eb/No (S + N)/N = 10 dB
CENTER 70.000 MHz
*RB 10.0 kHz
*VB 10.0 Hz
SPAN 1.000 MHz
ST 30.00 sec
Figure 5-2. Typical Output Spectrum (with Noise)
RL -20.29 dBm
ATTEN 10 dB
5.00 dB/DIV
PASS
CENTER FREQUENCY
140.000 MHz
CENTER 140.000 MHz
*RB 30.0 kHz
*VB 3.00 Hz
SPAN 5.000 MHz
ST 166.7 sec
Figure 5-3. Typical Output Spectrum (without Noise)
5–5
SNM-1002 LinkSync Modem
Maintenance
5.1.3
Revision 2
MN/SNM1002.OM
Demodulator Checkout
Use the following procedure to test the demodulator.
1. Set up the equipment as shown in Figure 5-1. Refer to Chapter 4 for the
demodulator specifications.
2. Set up the modem with an external IF loop and level. Use a properly operating
modulator, and ensure that power levels, data rates, code rates, etc., are
compatible.
3. Allow the modem to lock up. Depending on the data rate and overhead type,
lock up may take several seconds. When the green carrier detect LED is on and
the DEMUX lock fault has been cleared (where applicable), the modem will run
at the specified error rate. Run the TX power level (input amplitude) over the full
range, and offset the TX frequency from the RX frequency by 35 kHz. Ensure
the modem still runs within the specified error rate.
4. Set up the modem to check the constellation patterns with an oscilloscope that is
set in the X-Y mode. Typical constellation patterns with noise and without noise
are shown in Figure 5-4. These test points are available on the auxiliary
connector (J9, pins 6 and 8). It is not necessary to open the modem to look at
these test points.
5–6
SNM-1002 LinkSync Modem
Maintenance
Revision 2
MN/SNM1002.OM
WITH NOISE
WITHOUT NOISE
Figure 5-4. Typical Eye Constellations
5–7
SNM-1002 LinkSync Modem
Maintenance
5.2
Revision 2
MN/SNM1002.OM
Fault Isolation
The modem’s design allows a technician to repair a faulty modem on location.
CAUTION
This equipment contains parts and assemblies sensitive to damage by ESD.
Use ESD precautionary procedures when touching, removing, or inserting
PCBs.
The fault isolation procedure lists the following categories of faults or alarms.
•
•
•
•
•
•
Modulator
Demodulator
Transmit Interface
Receive Interface
Common Equipment
Backward Alarms
Note: Each fault or alarm category includes possible problems and the appropriate action
required to repair the modem.
If any of the troubleshooting procedures mentioned earlier in this chapter do not isolate
the problem, and Comtech EFData Customer Support assistance is necessary, have the
following information available for the representative:
5.2.1
•
Modem configuration. Modem configuration includes the modulator,
demodulator, interface, or local AUPC sections.
•
Faults (active or stored).
System Faults/Alarms
System faults are reported in the “Faults/Alarms” menu, and stored faults are reported in
the “Stored Flts/Alms” menu. Refer to Appendix A for more information. To determine
the appropriate action for repairing the modem, refer to Table 5-2 and the list of possible
problems.
5–8
SNM-1002 LinkSync Modem
Maintenance
Revision 2
MN/SNM1002.OM
*
**
X
X
X
X
X
X
X
X
X
X
X
Legend
Note
Fault/Alarm Relay
Test Points Connector/Pins
1
TX FAULT
Pin 4 (NO), 5 (COM), 6 (NC) *
2
RX FAULT
Pin 7 (NO), 8 (COM), 9 (NC) *
3
COM EQ FAULT
Pin 1 (NO), 2 (COM), 3 (NC) *
4
TX ALARM #2
Pin 4 (NO), 5 (COM), 6 (NC) *
5
RX ALARM #3
Pin 7 (NO), 8 (COM), 9 (NC) *
6
PRIMARY ALARM
Pin 43 (NO), 10 (COM), 27 (NC) *
7
SECONDARY ALARM
Pin 44 (NO), 11 (COM), 28 (NC) *
8
DEF MAINT ALARM
Pin 17 **
A connection between the common and N.O. contacts indicate no fault/alarm.
Signal is open collector high impedance if faulted.
5–9
SECONDARY ALARM RELAY
DEFERRED MAIN ALARM
SPARE ALARM RELAY #1
RX ALARM RELAY #3
(5)
PRIMARY ALARM RELAY
(4)
X
X
X
X
X
RX ALARM LED
X
X
X
(3)
TX ALARM RELAY #2
X
X
X
TX ALARM LED
X
X
X
(2)
COM EQ FAULT RELAY
(1)
X
X
X
X
X
COM EQ FAULT LED
X
X
X
X
X
RX FAULT RELAY
X
X
X
X
X
RX FAULT LED
TX FAULT RELAY
IF SYNTHESIZER
DATA CLOCK SYN
I CHANNEL
Q CHANNEL
AGC
MODEM REF ACT
MODEM REF PLL
MODULE
CONFIGURATION
DEMODULATOR FAULTS
CARRIER DETECT
IF SYNTHESIZER
I CHANNEL
Q CHANNEL
BER THRESHOLD
MODULE
CONFIGURATION
TX FAULT LED
MODULATOR FAULTS
TX IF OUTPUT OFF
Table 5-2. SNM-1002 Fault Tree
(6)
(7)
(8)
SNM-1002 LinkSync Modem
Maintenance
Revision 2
MN/SNM1002.OM
TX DROP
TX DATA/AIS
TX CLK PLL
TX CLK ACTIVITY
TX AUDIO 1 CLIP
TX AUDIO 2 CLIP
CONFIGURATION
RX INTERFACE FAULTS
BUFFER UNDERFLOW
BUFFER OVERFLOW
RX DATA/AIS
FRAME BER
BACKWARD ALARM
BUFFER CLK PLL
BUFFER CLK ACT
DEMUX LOCK
RX 2047 LOCK
BUFFER FULL
RX INSERT
RX AUDIO 1 CLIP
RX AUDIO 2 CLIP
CONFIGURATION
X
X
X
X
X
X
SPARE RELAY ALARM #1
(5)
X
Not Applicable
Not Applicable
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Not Applicable
Not Applicable
X
X
X
X
Not Applicable
Not Applicable
Not Applicable
X
X
Legend
Test Note
Fault/Alarm Relay
Test Points Connector/Pins
1
TX FAULT
Pin 4 (NO), 5 (COM), 6 (NC) *
2
RX FAULT
Pin 7 (NO), 8 (COM), 9 (NC) *
3
COM EQ FAULT
Pin 1 (NO), 2 (COM), 3 (NC) *
4
TX ALARM #2
Pin 4 (NO), 5 (COM), 6 (NC) *
5
RX ALARM #3
Pin 7 (NO), 8 (COM), 9 (NC) *
6
PRIMARY ALARM
Pin 43 (NO), 10 (COM), 27 (NC) *
7
SECONDARY ALARM
Pin 44 (NO), 11 (COM), 28 (NC) *
8
DEF MAINT ALARM
Pin 17 **
*
A connection between the common and N.O. contacts indicate no fault/alarm.
**
Signal is open collector high impedance if faulted.
5–10
DEFERRED MAIN ALARM
(4)
RX ALARM RELAY #3
RX ALARM LED
TX ALARM RELAY #2
TX ALARM LED
COM EQ FAULT LED
COM EQ FAULT RELAY
(3)
SECONDARY ALARM RELAY
(2)
PRIMARY ALARM RELAY
(1)
Not Applicable
RX FAULT RELAY
RX FAULT LED
TX FAULT RELAY
TX FAULT LED
TX INTERFACE FAULTS
TX IF OUTPUT OFF
Table 5-2. SNM-1002 Fault Tree (Continued)
(6)
(7)
(8)
SNM-1002 LinkSync Modem
Maintenance
Revision 2
MN/SNM1002.OM
(5)
X
X
X
X
X
Legend
Test Note
Fault/Alarm Relay
Test Points Connector/Pins
1
TX FAULT
Pin 4 (NO), 5 (COM), 6 (NC) *
2
RX FAULT
Pin 7 (NO), 8 (COM), 9 (NC) *
3
COM EQ FAULT
Pin 1 (NO), 2 (COM), 3 (NC) *
4
TX ALARM #2
Pin 4 (NO), 5 (COM), 6 (NC) *
5
RX ALARM #3
Pin 7 (NO), 8 (COM), 9 (NC) *
6
PRIMARY ALARM
Pin 43 (NO), 10 (COM), 27 (NC) *
7
SECONDARY ALARM
Pin 44 (NO), 11 (COM), 28 (NC) *
8
DEF MAINT ALARM
Pin 17 **
*
A connection between the common and N.O. contacts indicate no fault/alarm.
**
Signal is open collector high impedance if faulted.
5–11
DEFERRED MAIN ALARM
SPARE ALARM RELAY #1
RX ALARM RELAY #3
RX ALARM LED
TX ALARM RELAY #2
(4)
SECONDARY ALARM RELAY
(3)
X
X
X
X
X
X
X
TX ALARM LED
COM EQ FAULT RELAY
COM EQ FAULT LED
RX FAULT RELAY
(2)
BATTERY/CLOCK
-12V POWER SUPPLY
+12V POWER SUPPLY
+5V SUPPLY
SELF TEST
CONTROLLER
INTERFACE MODULE
PRIMARY ALARM RELAY
(1)
RX FAULT LED
TX FAULT RELAY
TX FAULT LED
COMMON EQUIP FAULTS
TX IF OUTPUT OFF
Table 5-2. SNM-1002 Fault Tree (Continued)
(6)
(7)
(8)
SNM-1002 LinkSync Modem
Maintenance
5.2.2
Revision 2
MN/SNM1002.OM
Faults/Alarms Display
General fault, status, and alarm information are indicated by 10 LEDs located on the
modem’s front panel.
A fault (red LED) indicates a fault that currently exists in the modem.
When a fault occurs, it is stored in the stored fault memory, and indicated by the single
yellow LED.
The LED is turned off when the fault clears. If the fault clears, the occurrence is also
stored.
A total of 10 occurrences of any fault can be stored. Each fault or stored fault indicated
by a front panel LED could be one of many faults. To determine which fault has
occurred, use the directions in Appendix A.
Alarms are considered minor faults which will not switch the modem offline in a
redundant system. Alarms are shown by following the direction in section A.4.
5.2.3
Faults/Alarms Analysis
This section describes the possible problems and actions to take for the following faults:
•
•
•
•
•
•
Modulator
Demodulator
Transmit interface
Receive interface
Common equipment
Backward alarm
5–12
SNM-1002 LinkSync Modem
Maintenance
5.2.3.1
Revision 2
MN/SNM1002.OM
Modulator Faults
Fault/Alarm
IF SYNTHESIZER
Possible Problem and Action
Modulator IF synthesizer fault.
DATA CLOCK SYN
This is considered a major alarm, and will turn off the modulator
output. Return the modem for repair.
Transmit data clock synthesizer fault.
I CHANNEL
This fault indicates that the internal clock VCO has not locked to the
incoming data clock, or the internal clock synthesizer has not locked
to the internal reference. This is considered a major alarm, and will
turn off the modulator output. Ensure the proper data rate has been
set up and selected, and the incoming data rate matches the modem
selections Use interface loopback for isolating the problem. Verify
the frequency of the input data clock to be within the lock range of
100 PPM.
Activity alarm for the I channel digital filter.
Q CHANNEL
This alarm is considered a major alarm, and will turn off the
modulator IF output. An alarm in this position indicates either a fault
in the scrambler, or if the scrambler is disabled, the alarm indicates a
loss of incoming data. If the fault is active with the scrambler turned
off, check for input data at the DATA I/O connector.
Activity alarm for the Q channel digital filter.
AGC LEVEL
Use the I channel procedure.
Output power AGC level fault.
MODEM REF ACT
Indicates the level at the modulator output is not the programmed
level.
Modem REF ACT fault.
MODEM REF PLL
Indicates incorrect EXT REF frequency input.
Modem REF PLL
EXT REF ACT
Indicates phase lock loop is unable to lock to EXT REF.
External reference activity fault.
MODULE
Indicates clock reference not detected.
Modulator module fault.
CONFIGURATION
Typically indicates that the modulator module is missing or will not
program.
Modulator/Demodulator Configuration fault.
Indicates a fault in either the Modulator or Demodulator state.
5–13
SNM-1002 LinkSync Modem
Maintenance
5.2.3.2
Revision 2
MN/SNM1002.OM
Demodulator Faults
Fault/Alarm
CARRIER DETECT
Possible Problem and Action
Carrier detect fault.
Indicates the decoder is not locked. This is the most common fault
displayed in the modem. Any problem from the input data on the
modulator end of the circuit to the output of the decoder can cause this
alarm.
IF SYNTHESIZER
First, ensure the demodulator has an RF input at the proper frequency
and power level. Ensure the demodulator data rate is properly
programmed. Refer to the fault isolation procedure for Data Clock Sync
in the modulator section. Verify the frequency of the data transmitted
from the modulator is within 100 PPM.
Demodulator IF synthesizer fault.
Indicates the demodulator IF synthesizer is faulted.
I CHANNEL
Q CHANNEL
This fault is a hardware failure. Contact the Comtech EFData Customer
Support Department.
Indicates a loss of activity in the I channel of the quadrature
demodulator.
Typically indicates a problem in the modulator side of the circuit. Check
for proper RF input to the demodulator. If the input to the demodulator
is correct, then the problem is in the baseband processing.
Indicates a loss of activity in the Q channel of the quadrature
demodulator.
BER THRESHOLD
Follow the same procedure for the I channel fault.
Indicates the preset BER threshold has been exceeded.
MODULE
Setting of this alarm is done in the Utility menu. This is an alarm based
on the corrected BER reading on the front panel.
Demodulator module fault.
CONFIGURATION
Typically indicates that the demodulator module is missing or will not
program. Contact the Comtech EFData Customer Support Department.
Modulator/Demodulator Configuration fault.
Indicates a fault in either the Modulator or Demodulator state.
5–14
SNM-1002 LinkSync Modem
Maintenance
5.2.3.3
Revision 2
MN/SNM1002.OM
Transmit Interface Faults
Fault/Alarm
TX DROP
TX DATA/AIS
Possible Problem and Action
Not Applicable
Data or incoming AIS.
TX CLOCK PLL
TX CLOCK ACT
When the AIS is selected in the Interface Utility menu for TX data
fault, the transmit interface fault TX data/AIS is monitoring a fault
condition of all 1s from customer data input to the modem. When data
is selected in the Interface Utility menu for TX data fault, the TX
interface fault TX data/AIS is monitoring a fault condition of all 1s or
0s. This is referred to as a data-stable condition (data is not
transitioning). This fault indicates there is trouble in the chain sending
data to the modem. The modem passes this signal transparently, and
takes no other action. This indication is a monitor function only, and
aids in isolating the trouble source in a system.
Not Applicable
Activity detector alarm of the selected interface TX clock.
CONFIGURATION
Indicates the selected TX clock is not being detected. Check the signal
of the selected TX clock source to verify the signal is present. The
interface will fall back to the internal clock when this alarm is active.
Modulator/Demodulator Configuration fault.
Indicates a fault in either the Modulator or Demodulator state.
5–15
SNM-1002 LinkSync Modem
Maintenance
5.2.3.4
Revision 2
MN/SNM1002.OM
Receive Interface Faults
Fault/Alarm
BUFFER UNDERFLOW
Possible Problem and Action
Buffer underflow alarm.
BUFFER OVERFLOW
Indicates the plesiochronous buffer has underflowed. Buffer underflow
is normally a momentary fault (there are clock problems if this alarm is
continuously present). This alarm is included in this section to be
consistent with the fault reporting system and to be correctly registered
in the stored fault memory. The time and date of the first 10 receive
buffer underflow faults are stored in battery-backed memory as an aid
to troubleshooting. The interval between stored overflow/underflow
events can be used to determine relative clock accuracies.
Buffer overflow alarm.
Indicates the plesiochronous buffer has overflowed.
RX DATA/AIS
FRAME BER
BACKWARD ALARM
The problems and actions in the buffer underflow section apply to this
alarm.
Data or incoming AIS. The data monitored for RX data is coming from
the satellite.
When the AIS is selected for RX data fault in the Interface Utility
menu, the RX data/AIS is monitoring an alarm condition of all 1s from
the satellite. When data is selected for RX data fault in the Interface
Utility menu, the RX data/AIS is monitoring a fault condition of all 1s
or 0s. This is referred to as a data-stable condition (data is not
transitioning). The fault indicates trouble in receiving data from the
satellite. The modem passes this signal transparently, and can close a
FORM C contact. The indication is a monitor function only to help
isolate the source of trouble in a system.
Not Applicable
Not Applicable
5–16
SNM-1002 LinkSync Modem
Maintenance
Fault/Alarm
BUFFER CLK PLL
BUFFER CLK ACT
DEMUX_LOCK
Revision 2
MN/SNM1002.OM
Possible Problem and Action
Buffer clock phase-locked loop fault. The buffer synthesizer is the
wrong frequency or will not lock.
Ensure the selected buffer clock source is at the proper frequency and
level. If the fault continues, contact the Comtech EFData Customer
Support Department.
Activity detector alarm of the selected interface receive clock.
The interface will fall back to the satellite clock when this fault is
active.
Demultiplexer synchronization lock fault. This fault means that the
demultiplexer is unable to maintain valid frame and multiframe
alignment.
RX 2047 LOCK
The usual cause is invalid or absent receive data. This is a major
(prompt) alarm. The alarm will cause insertion of receive AIS (all 1s)
and the switch-over will be attempted. This fault is to be sent as a
backward alarm to the distant end. This fault will occur when no
carrier is present, but will probably never occur with a correct signal.
RX 2047 lock alarm.
BUFFER FULL
Indicates the RX 2047 data test pattern is not being received by the
decoder. The alarm probably indicates the transmitter is not set
correctly.
Buffer full alarm.
RX INSERT
RX AUDIO 1 CLIP
RX AUDIO 2 CLIP
CONFIGURATION
Indicates the buffer is < 10% or > 90% full.
Not Applicable
Not Appliable
Not Applicable
Modulator/Demodulator Configuration fault.
Indicates a fault in either the Modulator or Demodulator state.
5–17
SNM-1002 LinkSync Modem
Maintenance
5.2.3.5
Revision 2
MN/SNM1002.OM
Common Equipment Faults
Fault/Alarm
BATTERY/CLOCK
Possible Problem and Action
M&C battery voltage or clock fault.
-12 VOLT SUPPLY
Indicates a low voltage in the memory battery. Typically, this fault will
be active when a modem has been hard reset or the firmware has been
changed. When a hard reset has been executed or the firmware has been
changed, this fault will typically be active when the modem is first
turned on.
-12V power supply fault.
Indicates a high or low voltage condition. Level is ± 5%.
+12 VOLT SUPPLY
Check for a short on the –12V line from the power supply or on any of
the plug-in boards.
+12 VDC power supply fault. Use the same procedure as with –12V
fault.
+5 VOLT SUPPLY
+5V power supply fault. Use the same procedure as with a –12V fault.
SELF TEST
The +5V supply requires a minimum load of 1A.
Self test Fault.
CONTROLLER
Indicates a failed Self Test by sending a signal through the RF loopback
and IF loopback and checking for quality.
Controller fault.
INTERFACE
Indicates a loss of power in the M&C card. Typically indicates the
controller has gone through a power on/off cycle.
Interface module fault.
Indicates a problem in programming the interface card.
5–18
Appendix A. REMOTE CONTROL
OPERATION
This appendix describes the remote control operation of the SNM-1002 LinkSync™.
•
•
Firmware number:
Software version:
FW/6535-3G
4.1.5
Note: The firmware referenced in this manual may be an earlier version of the actual
firmware supplied with the unit.
A.1
General
Note: Under normal operation, the MIDAS NMS configures and controls the LinkSync
modem for all the functions it provides using the remote control port. For purpose of this
manual, the complete list of Remote Commands are provided. However, for practical usage,
these remote commands will likely never be used nor required by an operator.
Remote controls and status information are transferred via an EIA-232 serial
communications link. Commands and data are transferred on the remote control
communications link as US ASCII-encoded character strings. The remote communications
link is operated in a half-duplex mode. Communications on the remote link are initiated by
a remote controller or terminal. The modem never transmits data on the link unless it is
commanded to do so.
A–1
SNM-1002 LinkSync Modem
Remote Control Operation
A.2
Revision 2
MN/SNM1002.OM
Message Structure
The ASCII character format used requires 11 bits/character:
•
•
•
•
1 start bit
7 information bits
1 parity bit
2 stop bits
Messages on the remote link fall into the categories of commands and responses.
Commands are messages which are transmitted to a satellite modem, while responses are
messages returned by a satellite modem in response to a command.
The general message structure is as follows:
•
•
•
•
A.2.1
Start Character
Device Address
Command/Response
End of Message Character
Start Character
A single character precedes all messages transmitted on the remote link. This character flags
the start of a message. This character is:
•
•
A.2.2
“<” for commands
“>” for responses
Device Address
The device address is the address of the one satellite modem which is designated to receive
a transmitted command, or which is responding to a command.
Valid device addresses are 1 to 3 characters long, and in the range of 1 to 255. Address 0 is
reserved as a global address which simultaneously addresses all devices on a given
communications link. Devices do not acknowledge global commands.
Each satellite modem which is connected to a common remote communications link must
be assigned its own unique address. Addresses are software selectable at the modem, and
must be in the range of 1 to 255.
A–2
SNM-1002 LinkSync Modem
Remote Control Operation
A.2.3
Revision 2
MN/SNM1002.OM
Command/Response
The command/response portion of the message contains a variable-length character
sequence which conveys command and response data.
If a satellite modem receives a message addressed to it which does not match the established
protocol or cannot be implemented, a negative acknowledgment message is sent in
response. This message is:
•
>add/?ER1_parity error'cr''lf']
(Error message for received parity errors.)
•
>add/?ER2_invalid parameter'cr''lf']
(Error message for a recognized command which cannot be implemented or has parameters
which are out of range.)
•
>add/?ER3_unrecognizable command'cr''lf']
(Error message for unrecognizable command or bad command syntax.)
•
>add/?ER4_modem in local mode'cr''lf']
(Modem in local error; send the REM command to go to remote mode.)
•
>add/?ER5_hard coded parameter'cr''lf']
(Error message indicating that the parameter is hardware dependent and may not be changed
remotely.)
Note: “add” is used to indicate a valid 1 to 3 character device address in the range
between 1 and 255.
A.2.4
End Character
Each message is ended with a single character which signals the end of the message:
•
•
“cr”
“]”
Carriage return character for commands
End bracket for responses
A–3
SNM-1002 LinkSync Modem
Remote Control Operation
Revision 2
MN/SNM1002.OM
A.3
Configuration Commands/Responses
A.3.1
Modulator
Modulator
Frequency
RF Output (IF
Output)
Modulator
Rate Preset
Assignment
Where: nnn.nnnn = Frequency in MHz,
50.000000 to 180.000000 in 1 Hz steps.
Command:
Response:
<add/MF_nnn.nnnnnn'cr'
>add/MF_nnn.nnnnnn'cr'
RF_OFF'cr''lf']
Status:
Response:
<add/MF_'cr'
>add/MF_nnn.nnnnnn'cr''lf']
Command:
Response:
<add/RF_xxx'cr'
>add/RF_xxx'cr''lf']
Status:
Response:
<add/RF_'cr'
>add/RF_xxx'cr''lf']
Command:
Response:
<add/AMRx_nnnn_mmmm.mmm'cr'
>add/AMRx_nnnn_mmmm.mmm'cr''lf']
Status:
Response:
<add/AMRx_'cr'
>add/AMRx_nnnn_mmmm.mmm'cr''lf']
Note: When the modulator frequency is
programmed, the RF output is switched off.
Where: xxx = ON or OFF.
Where:
x = A, B, C, D, or V [preset designator].
nnnn = 1/2 (QPSK 1/2), [coder rate], 3/4
(QPSK 3/4), 7/8 (QPSK 7/8), BP12 (BPSK
1/2), 8P23 (8PSK 2/3).
mmmm.mmm = Data rate in kHz.
Modulator
Rate Preset
Selection
Modulator
Rate Variable
Assignment &
Selection
Where: x = A, B, C, D, or V (preset
designator).
Command:
Response:
<add/SMRx_'cr'
>add/SMRx_'cr'
RF_OFF'cr''lf']
Status:
See MR command.
Command:
Response:
<add/SMRV_nnnn_mmmm.mmm'cr'
>add/SMRV_nnnn_mmmm.mmm'cr'
RF_OFF'cr''lf']
Status:
Note: Setting the modulator rate turns off the
RF transmitter.
See MR command.
Where:
nnnn = 1/2 (QPSK 1/2), [coder rate], 3/4
(QPSK 3/4), 7/8 (QPSK 7/8), BP12 (BPSK
1/2), 8P23 (8PSK 2/3).
mmmm.mmm = Data rate in kHz.
Note: Setting the modulator turns off the RF
transmitter.
Set Modulator
Power Offset
Command:
Response:
<add/MPO_snn.n'cr'
>add/MPO_snn.n'cr''lf']
Where: snn.n = +99.0 to -99.0, in 0.1 dB
increments.
Status:
Response:
<add/MPO_'cr'
>add/MPO_snn.n'cr''lf']
Note: The modulator power offset is added to
the nominal power level to adjust the transmit
power range.
A–4
SNM-1002 LinkSync Modem
Remote Control Operation
Set
Modulator
Output
Power
Level
Revision 2
MN/SNM1002.OM
Command:
Response:
<add/MOP_snn.n'cr'
>add/MOP_snn.n'cr''lf']
Where: snn.n = -30.0 to -5.0, in 0.1 steps
(nominal range in dBm).
Status:
Response:
<add/MOP_'cr'
>add/MOP_snn.n'cr''lf']
Notes:
1.
2.
The nominal power range is modified
relativeto the value specified by the
modulator power offset (MPO_).
The MOP_ command will return
status only when local AUPC is
enabled.
Where: xxx = ON or OFF.
Command:
Response:
<add/SE_xxx'cr'
>add/SE_xxx'cr''lf']
Status:
Response:
<add/SE_'cr'
>add/SE_xxx'cr''lf']
Command:
Response:
<add/DENC_xxx'cr'
>add/DENC_xxx'cr''lf']
Status:
Response:
<add/DENC_'cr'
>add/DENC_xxx'cr''lf']
Command:
Response:
<add/MT_xxxx'cr'
>add/MT_xxxx'cr''lf']
Status:
Response:
<add/MT_xxxx'cr'
>add/MT_xxxx'cr''lf']
Where: xxxx = INTL (INTELSAT OPEN
NETWORK), EFD (EF DATA CLOSED
NETWORK), CSC (COMSTREAM CLOSED
NETWORK), FDC (FAIRCHILD CLOSED
NETWORK), SDM51 (SDM51 COMPATIBLE).
Command:
Response:
<add/MET_xxx'cr'
>add/MET_xxx'cr''lf']
Where: xxx = VIT (K-7 VITERBI ENCODER),
SEQ (SEQUENTIAL ENCODER).
Status:
Response:
<add/MET_xxx'cr'
>add/MET_xxx'cr''lf']
Command:
Response:
<add/MRC_xxxxx'cr'
>add/MRC_xxxxx'cr''lf']
Status:
Response:
<add/MRC_'cr'
>add/MRC_xxxxx'cr''lf']
Where: xxxxx = INT (INTERNAL), EXT1
(EXTERNAL 1 MHz), EXT5 (EXTERNAL 5
MHz), EXT10 (EXTERNAL 10 MHz), EXT20
(EXTERNAL 20 MHz), OUT10 (OUTPUT 10
MHz).
Command:
Response:
<add/MSR_xxx'cr'
>add/MSR_xxx'cr''lf']
Where: xxx = NRM (normal spectrum), INV
(inverted spectrum).
Status:
Response:
<add/MSR_'cr'
>add/MSR_xxx'cr''lf']
Transmit
BPSK
Data
Ordering
Command:
Response:
<add/TDA_xxx'cr'
>add/TDA_xxx'cr''lf']
Status:
Response:
<add/TDA_xxx'cr'
>add/TDA_xxx'cr''lf']
Carrier
Only Mode
Command:
Response:
<add/COM_xxxxxx'cr'
>add/COM_xxxxxx'cr''lf']
Status:
Response:
<add/COM_xxxxxx'cr'
>add/COM_xxxxxx'cr''lf']
Scrambler
Enable
Differential
Encoder
Enable
Modulator
Type
Modulator
Encoder
Type
Modem
Reference
Clock
Modulator
Spectrum
Rotation
Where: xxx = ON or OFF.
Where: xxx = NRM (STANDARD), INV (NONSTANDARD).
Where: xxxxxx = OFF (NORMALMODULATED), DUAL (DUAL-CW), OFFSET
(OFFSET-CW), CENTER (CENTER-CW).
A–5
SNM-1002 LinkSync Modem
Remote Control Operation
A.3.2
Set
Demodulator
Frequency
Demodulator
Rate Preset
Assignment
Revision 2
MN/SNM1002.OM
Demodulator
Command:
Response:
<add/DF_nnn.nnnnnn'cr'
>add/DF_nnn.nnnnnn'cr''lf']
Status:
Response:
<add/DF_'cr'
>add/DF_nnn.nnnnnn'cr''lf']
Command:
Response:
<add/ADRx_nnnn_mmmm.mmm'cr'
>add/ADRx_nnnn_mmmm.mmm'cr''lf']
Status:
Response:
<add/ADRx_'cr'
>add/ADRx_nnnn_mmmm.mmm'cr''lf']
Where: nnn.nnnn = Frequency in MHz,
50.000000 to 180.000000 in 1 Hz steps.
Where:
x = A, B, C, D, or V [preset designator].
nnnn = 1/2 (QPSK 1/2), [decoder rate], 3/4
(QPSK 3/4), 7/8 (QPSK 7/8), BP12 (BPSK
1/2), 8P23 (8PSK 2/3).
mmmm.mmm = Data rate in kHz.
Demodulator
Rate Preset
Selection
Demodulator
Rate Variable
Assignment &
Selection
Where: x = A, B, C, D, or V (preset
designator).
Command:
Response:
<add/SDRx_'cr'
>add/SDRx_'cr''lf']
Status:
See DR command.
Command:
Response:
<add/SDRV_nnnn_mmmm.mmm'cr'
>add/SDRV_nnnn_mmmm.mmm'cr''lf']
Status:
See DR command.
Where:
nnnn = 1/2 (QPSK 1/2), [decoder rate], 3/4
(QPSK 3/4), 7/8 (QPSK 7/8), BP12 (BPSK
1/2), 8P23 (8PSK 2/3).
mmmm.mmm = Data rate in kHz.
Descramble
Enable
Differential
Decoder
Enable
RF Loopback
Command:
Response:
<add/DE_xxx'cr'
>add/DE_xxx'cr''lf']
Status:
Response:
<add/DE_'cr'
>add/DE_xxx'cr''lf']
Command:
Response:
<add/DDEC_xxx'cr'
>add/DDEC_xxx'cr''lf']
Status:
Response:
<add/DDEC_'cr'
>add/DDEC_xxx'cr''lf']
Command:
Response:
<add/RFL_xxx'cr'
>add/RFL_xxx'cr''lf']
Status:
Response:
<add/RFL_'cr'
>add/RFL_xxx'cr''lf']
Where: xxx = ON or OFF.
Where: xxx = ON or OFF.
Where: xxx = ON or OFF.
A–6
SNM-1002 LinkSync Modem
Remote Control Operation
IF Loopback
Sweep Center
Frequency
Sweep Width
Range
Sweep
Reacquisition
Bit Error Rate
Threshold
Demodulator
Type
Demodulator
Decoder
Type
Demodulator
Spectrum
Rotation
Receive
BPSK Data
Ordering
Revision 2
MN/SNM1002.OM
Command:
Response:
<add/IFL_xxx'cr'
>add/IFL_xxx'cr''lf']
Status:
Response:
<add/IFL_'cr'
>add/IFL_xxx'cr''lf']
Command:
Response:
<add/SCF_snnnnn'cr'
>add/SCF_snnnnn'cr''lf']
Status:
Response:
<add/SCF_'cr'
>add/SCF_snnnnn'cr''lf']
Command:
Response:
<add/SWR_nnnnn'cr'
>add/SWR_nnnnn'cr''lf']
Status:
Response:
<add/SWR_'cr'
>add/SWR_nnnnn'cr''lf']
Command:
Response:
<add/SR_xxx'cr'
>add/SR_xxx'cr''lf']
Status:
Response:
<add/SR_'cr'
>add/SR_xxx'cr''lf']
Command:
Response:
<add/BERT_xxxx'cr'
>add/BERT_xxxx'cr''lf']
Status:
Response:
<add/BERT_'cr'
>add/BERT_xxxx'cr''lf']
Command:
Response:
<add/DT_xxxx'cr'
>add/DT_xxxx'cr''lf']
Status:
Response:
<add/DT_xxxx'cr'
>add/DT_xxxx'cr''lf']
Command:
Response:
<add/DDT_xxx'cr'
>add/DDT_xxx'cr''lf']
Status:
Response:
<add/DDT_xxx'cr'
>add/DDT_xxx'cr''lf']
Command:
Response:
<add/DSR_xxx'cr'
>add/DSR_xxx'cr''lf']
Status:
Response:
<add/DSR_'cr'
>add/DSR_xxx'cr''lf']
Command:
Response:
<add/RDA_xxx'cr'
>add/RDA_xxx'cr''lf']
Status:
Response:
<add/RDA_xxx'cr'
>add/RDA_xxx'cr''lf']
Where: xxx = ON or OFF.
Where: snnnnn = -35000 to +35000, in 1 Hz
steps.
Where: nnnnn = 0 to 70000, in 1 Hz steps.
Where: xxx = 0 to 999 (number of seconds).
Where: xxxx = NONE, or 1E-n, where n = 3,
4, 5, 6, 7, or 8 (exponent of threshold).
Where: xxxx = INTL (INTELSAT OPEN
NETWORK), EFD (EF DATA CLOSED
NETWORK), CSC (COMSTREAM CLOSED
NETWORK), FDC (FAIRCHILD CLOSED
NETWORK).
Where: xxx = VIT (K-7 VITERBI
ENCODER), SEQ (SEQUENTIAL
ENCODER).
Where: xxx = NRM (normal spectrum), INV
(inverted spectrum).
Where: xxx = NRM (STANDARD), INV
(NON-STANDARD).
A–7
SNM-1002 LinkSync Modem
Remote Control Operation
A.3.3
Interface
Interface
Transmit
Overhead
Type
Command:
Response:
<add/ITOT_xxxxx'cr'
>add/ITOT_xxxxx'cr''lf']
Status:
Response:
<add/ITOT_'cr'
>add/ITOT_xxxxx'cr''lf']
Interface
Receive
Overhead
Type
Command:
Response:
<add/IROT_xxxxx'cr'
>add/IROT_xxxxx'cr''lf']
Status:
Response:
<add/IROT_'cr'
>add/IROT_xxxxx'cr''lf']
TX Driver
Type
Command:
Response:
<add/TXDR_xxxxx'cr'
>add/TXDR_xxxxx'cr''lf']
Status:
Response:
<add/TXDR_'cr'
>add/TXDR_xxxxx'cr''lf']
Command:
Response:
<add/RXDR_xxxxx'cr'
>add/RXDR_xxxxx'cr''lf']
Status:
Response:
<add/RXDR_'cr'
>add/RXDR_xxxxx'cr''lf']
Command:
Response:
<add/TC_xxx'cr'
>add/TC_xxx'cr''lf']
Status:
Response:
<add/TC_'cr'
>add/TC_xxx'cr''lf']
External
ClockReference
Frequency
Command:
Response:
<add/ERF_nnnnn.n'cr'
>add/ERF_nnnnn.n'cr''lf']
Status:
Response:
<add/ERF_'cr'
>add/ERF_nnnnn.n'cr''lf']
Transmit
Clock
Phase
Command:
Response:
<add/TCP_xxxx'cr'
>add/TCP_xxxx'cr''lf']
Status:
Response:
<add/TCP_'cr'
>add/TCP_xxxx'cr''lf']
Command:
Response:
<add/BC_xxx'cr'
>add/BC_xxx'cr''lf']
Status:
Response:
<add/BC_'cr'
>add/BC_xxx'cr''lf']
Command:
Response:
<add/RCP_xxx'cr'
>add/RCP_xxx'cr''lf']
Status:
Response:
<add/RCP_'cr'
>add/RCP_xxx'cr''lf']
RX Driver
Type
Transmit
Clock
Buffer
Clock
Receive
Clock
Phase
Revision 2
MN/SNM1002.OM
Where: xxxxx = NONE
Where: xxxxx = NONE
Where: xxxxx = V35, RS422, or RS232.
Where: xxxxx = V35, RS422, or RS232.
Where: xxx = INT (internal SCT clock), EXT
(external TX terrestrial clock), REF (external clockreference frequency).
Where: nnnnn.n = 8.0 to 10000.0 (external clock
frequency in kHz).
Where: xxxx = NRM (normal clock phasing), INV
(inverted clock phasing), AUTO (automatic clock
phasing).
Where: xxx = INT (internal SCT clock), EXT
(external TX terrestrial clock), SAT (receive satellite
clock), REF (external clock-reference frequency),
INS (insert clock).
Where: xxx = NRM (normal clock phasing), INV
(inverted clock phasing).
A–8
SNM-1002 LinkSync Modem
Remote Control Operation
Baseband
Loopback
Interface
Loopback
Interface
Loop
Timing
Interface
Buffer Size
Command:
Response:
<add/BBL_xxx'cr'
>add/BBL_xxx'cr''lf']
Status:
Response:
<add/BBL_'cr'
>add/BBL_xxx'cr''lf']
Command:
Response:
<add/ILB_xxx'cr'
>add/ILB_xxx'cr''lf']
Status:
Response:
<add/ILB_'cr'
>add/ILB_xxx'cr''lf']
Command:
Response:
<add/ILT_xxx'cr'
>add/ILT_xxx'cr''lf']
Status:
Response:
<add/ILT_'cr'
>add/ILT_xxx'cr''lf']
Revision 2
MN/SNM1002.OM
Where: xxx = ON or OFF.
Where: xxx = ON or OFF.
Where: xxx = ON or OFF.
Buffer size programming is supported in two formats; bits, or milli-seconds. The selected format must be
chosen using the buffer programming command (IBP_). If the buffer is to be programmed in milli-seconds
and plesiochronous slips are required use the receive framing structure command (IRFS_) to define the
proper framing format.
Note: For Drop & Insert: Only milli-seconds format is allowed.
Interface
Buffer Size
(Bit
Format)
Command:
Response:
<add/IBS_nnnnnn'cr'
>add/IBS_nnnnnn'cr''lf']
Status:
Response:
<add/IBS_'cr'
>add/IBS_nnnnnn'cr''lf']
Interface
Buffer Size
(Millisecond
Format)
Command:
Response:
<add/IBS_nn'cr'
>add/IBS_nn'cr''lf']
Status:
Response:
<add/IBS_'cr'
>add/IBS_nn'cr''lf']
Interface
Buffer
Center
Command:
Response:
<add/IBC_'cr'
>add/IBC_'cr''lf']
Interface
Buffer
Programming
Command:
Response:
<add/IBP_xxxx'cr'
>add/IBP_xxxx'cr''lf']
Status:
Response:
<add/IBP_'cr'
>add/IBP_xxxx'cr''lf']
Interface
Receive
Farming
Structure
Command:
Response:
<add/IRFS_ff_ssss'cr'
>add/IRFS_ff_ssss'cr''lf']
Status:
Response:
<add/IRFS_ff'cr'
>add/IRFS_ff_ssss'cr''lf']
Where: nnnnnn = 32 to 262144, in 16 bit
increments.
Where: nn = 0 to 99 (buffer size in milli-seconds).
Note: For Drop & Insert:
1.
nn = 7.5, 15, or 30 (milli-seconds) for
E1CAS format.
2.
nn = 6, 12, 24, or 30 (milli-seconds)
for T1S/T1ESFS format.
3.
nn = 1, 2, 4, 8, 16, or 32 (milliseconds) for all other D&I formats.
Where: xxxx = BITS or MS (milli-seconds).
Note: For Drop & Insert: Only milli-seconds format
is allowed.
Where:
ff = T1 or E1 (frame type).
ssss = NONE or G704 (framing structure).
A–9
SNM-1002 LinkSync Modem
Remote Control Operation
Transmit
Data
Phase
Receive
Data
Phase
CTS Delay
Time
A.3.4
Time Of
Day
Date
Command:
Response:
<add/TDP_xxxx'cr'
>add/TDP_xxxx'cr''lf']
Status:
Response:
<add/TDP_'cr'
>add/TDP_xxxx'cr''lf']
Command:
Response:
<add/RDP_xxxx'cr'
>add/RDP_xxxx'cr''lf']
Status:
Response:
<add/RDP_'cr'
>add/RDP_xxxx'cr''lf']
Command:
Response:
<add/CTSD_xx'cr'
>add/CTSD_xx'cr''lf']
Status:
Response:
<add/CTSD_'cr'
>add/CTSD_xx'cr''lf']
Revision 2
MN/SNM1002.OM
Where: xxxx = NRM (normal data phasing), INV
(inverted data phasing).
Where: xxxx = NRM (normal data phasing), INV
(inverted data phasing).
Where: xx = 0 to 60 (number of seconds).
System
Where:
hh = 1 to 12 (hours).
mm = 00 to 59 (minutes).
xx = AM or PM.
Command:
Response:
<add/TIME_hh:mmxx'cr'
>add/TIME_hh:mmxx'cr''lf']
Status:
Response:
<add/TIME_'cr'
>add/TIME_hh:mmxx'cr''lf']
Command:
Response:
<add/DATE_mm/dd/yyyy'cr'
>add/DATE_mm/dd/yyyy'cr''lf']
Status:
Response:
<add/DATE_'cr'
>add/DATE_mm/dd/yyyy'cr''lf']
Where:
mm = 1 to 12 (month).
dd = 1 to 31 (day).
yyyy = 00 to 99 (year) in 2 - digit year mode, and
1975 to 1999 and 2000 to 2075 in 4 - digit mode.
Remote
Command:
Response:
<add/REM_'cr'
>add/REM_'cr''lf']
Configures the modem for remote operation.
The SDM300A will respond to any status request
at any time. However, the SDM300A must be in
'Remote Mode' to change configuration
parameters.
Clear
Stored
Faults
Modem
Operation
Mode
Command:
Response:
<add/CLSF_'cr'
>add/CLSF_'cr''lf']
This command is used to clear all stored faults
logged by the SDM300A.
Command:
Response:
<add/MOM_xxxxxxx'cr'
>add/MOM_xxxxxxx'cr''lf']
Where: xxxxxxx = TX_ONLY, RX_ONLY, or
DUPLEX.
Status:
Response:
<add/MOM_'cr'
>add/MOM_xxxxxxx'cr''lf']
This command configures the modem for simplex
or duplex operation modes. When transmit only
mode is selected, receive faults are inhibited and
when receive only mode is selected, transmit
faults are inhibited.
A–10
SNM-1002 LinkSync Modem
Remote Control Operation
System
Modem
Type
Save
Modem
Config.
Command:
Response:
<add/SMT_xxxxxxx'cr'
>add/SMT_xxxxxxx'cr''lf']
Status:
Response:
<add/SMT_'cr'
>add/SMT_xxxxxxx'cr''lf']
Command:
Response:
<add/SMC_n'cr'
>add/SMC_n'cr''lf']
Revision 2
MN/SNM1002.OM
Where: xxxxxx = EFD or CUSTOM.
Where: n = 1, 2, 3, 4, or 5 (stored configuration
number).
This command saves the current modem
configuration for recall at a later time using the
'RMC_' command. Up to five different modem
configurations can be saved.
Recall
Modem
Config.
Command:
Response:
Where: n = 1, 2, 3, 4, or 5 (stored configuration
number).
<add/RMC_n'cr'
>add/RMC_n'cr''lf']
This command causes the modem to be
reprogrammed with configuration parameters
previously saved using the 'SMC_' command.
One of five saved configurations can be
specified.
RTS TX-IF
Control
Mode
RF Mode
Control
Command:
Response:
<add/RTSM_xxx'cr'
>add/RTSM_xxx'cr''lf']
Status:
Response:
<add/RTSM_'cr'
>add/RTSM_xxx'cr''lf']
Command:
Response:
<add/RFMD_xxxx'cr'
>add/RFMD_xxxx'cr''lf']
Status:
Response:
<add/RFMD_xxxx'cr'
>add/RFMD_xxxx'cr''lf']
Where: xxx = ON or OFF.
This command configures the modem for the
RTS TX-IF control mode. If 'ON' is selected, the
TX-IF output will only be turned on if the incoming
RTS signal is asserted (also the TX-IF output has
to be programmed ON and no major modulator
faults are present). If 'OFF' is selected, the TX-IF
output will operate normal ignoring the RTS
signal.
Where: xxxx = NRM (Normal Mode), PWR (Turn
RF off on power up), COMM (Turn RF off on
power up and loss of remote communications
after 10 seconds), CD (Turn RF ON when carrier
is detected, turn RF OFF when no carrier is
detected. For the RF ON condition, the TX-IF
must be programmed ON. Note: RTS TX-IF,
when enabled over-rides CD).
This command allows for the RF output to be
enabled or disabled depending on the following
described conditions. One application for this
command will be in demand network systems.
A–11
SNM-1002 LinkSync Modem
Remote Control Operation
Revision 2
MN/SNM1002.OM
A.4
Status Commands/Responses
Modulator
Config.
Status
Command:
Response:
<add/MCS_'cr'
>add/MCS_'cr'
RF_xxx'cr'
MF_nnn.nnnnnn'cr'
MR_nnnn_mmmm.mmm'cr'
AMRA_nnnn_mmmm.mmm'cr'
AMRB_nnnn_mmmm.mmm'cr'
AMRC_nnnn_mmmm.mmm'cr'
AMRD_nnnn_mmmm.mmm'cr'
AMRV_nnnn_mmmm.mmm'cr'
MPO_snn.n'cr'
MOP_snn.n'cr'
SE_xxx'cr'
DENC_xxx'cr'
MT_xxxxx'cr'
MET_xxx'cr'
COM_xxxxxx'cr'
MRC_xxx'cr'
MSR_xxx'cr'
RSEN_xxx'cr'
TDA_xxx'cr'
TRSI_xx'cr'
T310_xxx'cr''lf']
RF Output
Modulator Frequency
Modulator Rate
Preset 'A' Assignment
Preset 'B' Assignment
Preset 'C' Assignment
Preset 'D' Assignment
Preset 'V' Assignment
Modulator Power Offset
Modulator Output Power
Scrambler Enable
Differential Encoder
Modulator Type
Modulator Encoder Type
Carrier Only Mode
Modulator Reference Clock
Modulator Spectrum Rotation
Reed-Solomon Encoder
Transmit BPSK Data Ordering
TX Reed-Solomon Interleave Value
TX 8PSK 2/3 IESS-310 Operation
The modulator configuration status command
causes a block of data to be returned by the
addressed modem. The block of data reflects the
current configuration status of the modulator
module. Additional configuration status of new
options and features will always be appended to
the end.
Modulator/
Coder
Config.
Program
Status
Command:
Response:
<add/MCP_'cr'
>add/MCP_'cr'
SMT_xxxxxxx'cr'
ITOT_xxxxx'cr'
MOM_xxxxxxx'cr'
MT_xxxxx'cr'
MET_xxx'cr'
TCEN_1_xxxx'cr'
TCDR_1_xxxx.x'cr'
TCEN_2_xxx'cr'
TCEN_3_xxxx'cr'
TCDR_3_xxxx.x'cr'
TCCP_3_yyy'cr'
TCDP_3_yyy'cr'
TCEN_4_xxxx'cr'
TCDR_4_xxxx.x'cr'
TCCP_4_yyy'cr'
TCDP_4_yyy'cr'
System Modem Type
Interface Transmit Overhead Type
Modem Operation Mode
Modulator Type
Modulator Encoder Type
Flex Mux TX Channel #1 Enable
Flex Mux TX Channel #1 Data Rate
Flex Mux TX Channel #2 Enable
Flex Mux TX Channel #3 Enable
Flex Mux TX Channel #3 Data Rate
Flex Mux TX Channel #3 Clock Phase
Flex Mux TX Channel #3 Data Phase
Flex Mux TX Channel #4 Enable
Flex Mux TX Channel #4 Data Rate
Flex Mux TX Channel #4 Clock Phase
Flex Mux TX Channel #4 Data Phase
Modulator Frequency
Modulator Rate
Modulator Power Offset
AUPC Local Power Enable
Modulator Output Power
(Note 1)
(Note 2)
(Note 1)
(Note 1)
(Note 3)
(Note 3)
(Note 3)
(Note 1)
(Note 4)
(Note 4)
(Note 4)
MF_nnn.nnnnnn'cr'
MR_nnnn_mmmm.mmm'cr'
MPO_snn.n'cr'
LPC_xxx'cr'
(Note 5)
MOP_snn.n'cr'
(Note 6)
SE_xxx'cr'
A–12
SNM-1002 LinkSync Modem
Remote Control Operation
Revision 2
MN/SNM1002.OM
DENC_xxx'cr'
ILT_xxx'cr'
ERF_nnnnn.n'cr'
TC_xxxx'cr'
TCP_xxxx'cr'
BBL_xxx'cr'
ILB_xxx'cr'
ILT_xxx'cr'
ICFT_xxxx'cr'
ISP_xxxxxx'cr'
ISP_xxx'cr'
TDF_xxxx'cr'
ISCL_TX1_nnn'cr'
ISCL_TX2_nnn'cr'
TDP_xxxx'cr'
DDF_xxxxxx'cr' (Note 7)
BDCA_dd;cc_dd;cc...'cr' (Note 7)
MRC_xxx'cr'
MSR_xxx'cr'
RSEN_xxx'cr'
BW_TX1_nnn'cr' (Note 8)
BW_TX2_nnn'cr' (Note 8)
BW_TX3_nnn'cr' (Note 8)
BW_TX4_nnn'cr' (Note 8)
TXDR_xxxxxx'cr'
TOBR_nnnnn'cr' (Note 9)
TCCL_n'cr'
(Note 9)
TCSB_n'cr'
(Note 9)
TOCP_xxxx'cr' (Note 9)
TCT_xxxxx'cr'
(Note 9)
NOMP_snn.n'cr' (Note 5)
MINP_snn.n'cr' (Note 5)
MAXP_snn.n'cr' (Note 5)
LCL_xxxx'cr'
(Note 5)
RCL_xxxx'cr'
(Note 5)
CTSD_xx'cr'
RTSM_xxx'cr'
TDA_xxx'cr'
COM_xxxxxx'cr'
TET_xxxxx'cr'
(Note 8)
MTDR_1_yyyyyy'cr'
(Note 10)
MTIT_1_yyyyy'cr' (Note 10)
MTCP_1_yyy'cr' (Note 10)
MTDP_1_yyy'cr' (Note 10)
MTMD_1_yyyyy'cr'
(Note 10)
MTAF_1_yyy'cr' (Note 10)
MTDR_2_yyyyyy'cr'
(Note 10)
MTIT_2_yyyyy'cr' (Note 10)
MTCP_2_yyy'cr' (Note 10)
MTDP_2_yyy'cr' (Note 10)
MTMD_2_yyyyy'cr'
(Note 10)
MTAF_2_yyy'cr' (Note 10)
MTDR_3_yyyyyy'cr'
(Note 10)
MTIT_3_yyyyy'cr' (Note 10)
MTCP_3_yyy'cr' (Note 10)
MTDP_3_yyy'cr' (Note 10)
MTMD_3_yyyyy'cr'
(Note 10)
MTAF_3_yyy'cr' (Note 10)
MTDR_4_yyyyyy'cr'
(Note 10)
MTIT_4_yyyyy'cr' (Note 10)
MTCP_4_yyy'cr' (Note 10)
A–13
Scrambler Enable
Differential Encoder
Interface Loop Timing
External Reference Frequency
Transmit Clock (Source)
Transmit Clock Phase
Baseband Loopback
Interface Loopback
Interface Loop Timing
Interface Coding Format Transmit
Interface Substitution Pattern (TX 2047)
Interface Substitution Pattern (TX 2047)
Transmit Data Fault
Service Channel Level TX1
Service Channel Level TX2
Transmit Data Phase
Drop Data Format
Bulk Drop Channels Assignment
Modulator Reference Clock
Modulator Spectrum Rotation
Reed-Solomon Encoder
Backward Alarm Enable TX1
Backward Alarm Enable TX2
Backward Alarm Enable TX3
Backward Alarm Enable TX4
TX Driver Type
ASYNC Transmit Overhead Baud Rate
ASYNC Transmit Channel Character Length
ASYNC Transmit Channel Stop Bits
ASYNC Transmit Overhead Channel Parity
ASYNC Transmit Communications Type
AUPC Nominal Power Value
AUPC Minimum Power Value
AUPC Maximum Power Value
AUPC Local Carrier Loss
AUPC Remote Carrier Loss
CTS Delay Time
RTS TX-IF Control Mode
Transmit BPSK Data Ordering
Carrier Only Mode
IDR Transmit ESC Type
Mux Tributary #1 Data Rate & Enable
Mux Tributary #1 Interface Type
Mux Tributary #1 Clock Phase
Mux Tributary #1 Data Phase
Mux Tributary #1 Mode
Mux Tributary #1 Async Mode
Mux Tributary #2 Data Rate & Enable
Mux Tributary #2 Interface Type
Mux Tributary #2 Clock Phase
Mux Tributary #2 Data Phase
Mux Tributary #2 Mode
Mux Tributary #2 Async Mode
Mux Tributary #3 Data Rate & Enable
Mux Tributary #3 Interface Type
Mux Tributary #3 Clock Phase
Mux Tributary #3 Data Phase
Mux Tributary #3 Mode
Mux Tributary #3 Async Mode
Mux Tributary #4 Data Rate & Enable
SNM-1002 LinkSync Modem
Remote Control Operation
Revision 2
MN/SNM1002.OM
MTDP_4_yyy'cr' (Note 10)
MTMD_4_yyyyy'cr'
(Note 10)
MTAF_4_yyy'cr' (Note 10)
MTDR_5_yyyyyy'cr'
(Note 10)
MTIT_5_yyyyy'cr' (Note 10)
MTCP_5_yyy'cr' (Note 10)
MTDP_5_yyy'cr' (Note 10)
MTMD_5_yyyyy'cr'
(Note 10)
MTAF_5_yyy'cr' (Note 10)
MTDR_6_yyyyyy'cr'
(Note 10)
MTIT_6_yyyyy'cr' (Note 10)
MTCP_6_yyy'cr' (Note 10)
MTDP_6_yyy'cr' (Note 10)
MTMD_6_yyyyy'cr'
(Note 10)
MTAF_6_yyy'cr' (Note 10)
MTDR_7_yyyyyy'cr'
(Note 10)
MTIT_7_yyyyy'cr' (Note 10)
MTCP_7_yyy'cr' (Note 10)
MTDP_7_yyy'cr' (Note 10)
MTMD_7_yyyyy'cr'
(Note 10)
MTAF_7_yyy'cr' (Note 10)
MTDR_8_yyyyyy'cr'
(Note 10)
MTIT_8_yyyyy'cr' (Note 10)
MTCP_8_yyy'cr' (Note 10)
MTDP_8_yyy'cr' (Note 10)
MTMD_8_yyyyy'cr'
(Note 10)
MTAF_8_yyy'cr' (Note 10)
TRSI_xx'cr'
T310_xxx'cr'
RF_xxx'cr''lf']
Mux Tributary #4 Interface Type
Mux Tributary #4 Clock Phase
Mux Tributary #4 Data Phase
Mux Tributary #4 Mode
Mux Tributary #4 Async Mode
Mux Tributary #5 Data Rate & Enable
Mux Tributary #5 Interface Type
Mux Tributary #5 Clock Phase
Mux Tributary #5 Data Phase
Mux Tributary #5 Mode
Mux Tributary #5 Async Mode
Mux Tributary #6 Data Rate & Enable
Mux Tributary #6 Interface Type
Mux Tributary #6 Clock Phase
Mux Tributary #6 Data Phase
Mux Tributary #6 Mode
Mux Tributary #6 Async Mode
Mux Tributary #7 Data Rate & Enable
Mux Tributary #7 Interface Type
Mux Tributary #7 Clock Phase
Mux Tributary #7 Data Phase
Mux Tributary #7 Mode
Mux Tributary #7 Async Mode
Mux Tributary #8 Data Rate & Enable
Mux Tributary #8 Interface Type
Mux Tributary #8 Clock Phase
Mux Tributary #8 Data Phase
Mux Tributary #8 Mode
Mux Tributary #8 Async Mode
TX Reed-Solomon Interleave Value
TX 8PSK 2/3 IESS-310 Operation
RF Output (ON/OFF)
This command is used by the Adaptive
Boradband M:N protection switch to collect
information that is necessary to configure backup modems. Because this command (content
and/or order) can be changed at any time by
Adaptive Boradband, it is advisable that other
commands ('MCS_' and 'ICS_', or 'BCS_') be
used for M&C systems.
Notes:
1
2.
3.
4.
5
Data is only returned if FLEX MUX PCB (Card Slot
#1) is installed.
Data not returned if Channel #1 is disabled.
Data not returned if Channel #3 is disabled or set
for AUPC.
Data not returned if Channel #4 is disabled or set
for AUPC.
Data is only returned for TX ASYNC
Overhead( or Flex Mux AUPC).
6. Data not returned if Local AUPC is enabled
& TX ASYNC overhead.
7. Data is only returned for TX D&I Overhead.
Data is only returned for TX IDR Overhead.
Data is only returned for TX ASYNC
Overhead (or Flex Mux D&I).
10. Data is only returned if MUX PCB (Card Slot
#1) is installed.
A–14
SNM-1002 LinkSync Modem
Remote Control Operation
Demodulat
or Config.
Status
Command:
Response:
Revision 2
MN/SNM1002.OM
<add/DCS_'cr'
>add/DCS_'cr'
DF_nnn.nnnnnn'cr'
DR_nnnn_mmmm.mmm'cr'
ADRA_nnnn_mmmm.mmm'cr'
ADRB_nnnn_mmmm.mmm'cr'
ADRC_nnnn_mmmm.mmm'cr'
ADRD_nnnn_mmmm.mmm'cr'
ADRV_nnnn_mmmm.mmm'cr'
DE_xxx'cr'
DDEC_xxx'cr'
RFL_xxx'cr'
IFL_xxx'cr'
SCF_snnnnn'cr'
SWR_nnnnn'cr'
SR_xxx'cr'
BERT_xxxx'cr'
DT_xxxx'cr'
DDT_xxx'cr'
DSR_xxx'cr'
RSDE_xxx'cr'
RDA_xxx'cr'
RRSI_xx'cr'
R310_xxx'cr''lf']
Demodulator Frequency
Demodulator Rate
Preset 'A' Assignment
Preset 'B' Assignment
Preset 'C' Assignment
Preset 'D' Assignment
Preset 'V' Assignment
Descrambler Enable
Differential Decoder
RF Loopback
IF Loopback
Sweep Center Frequency
Sweep Width Range
Sweep Reacquisition
BER Threshold
Demodulator Type
Demodulator Decoder Type
Demodulator Spectrum Rotation
Reed-Solomon Decoder
Receive BPSK Data Ordering
RX Reed-Solomon Interleave Value
RX 8PSK 2/3 IESS-310 Operation
The demodulator configuration status command
causes a block of data to be returned by the
addressed modem. The block of data reflects the
current configuration of the demod. Additional
configuration status of new options and features
will always be appended to the end.
Demod/
Decoder
Config.
Program
Status
Command:
Response:
<add/DCP_'cr'
>add/DCP_'cr'
SMT_xxxxxxx'cr'
IROT_xxxxx'cr'
MOM_xxxxxxx'cr'
BERT_xxxx'cr'
DT_xxxx'cr'
DDT_xxx'cr'
RCEN_1_xxxx'cr'
RCDR_1_xxxx.x'cr'
RCEN_2_xxx'cr'
RCEN_3_xxxx'cr'
RCDR_3_xxxx.x'cr'
RCCP_3_yyy'cr'
RCDP_3_yyy'cr'
RCEN_4_xxxx'cr'
RCDR_4_xxxx.x'cr'
RCCP_4_yyy'cr'
RCDP_4_yyy'cr'
System Modem Type
Interface Receive Overhead Type
Modem Operation Mode
BER Threshold
Demodulator Type
Demodulator Decoder Type
Flex Mux RX Channel #1 Enable
Flex Mux RX Channel #1 Data Rate
Flex Mux RX Channel #2 Enable
Flex Mux RX Channel #3 Enable
Flex Mux RX Channel #3 Data Rate
Flex Mux RX Channel #3 Clock Phase
Flex Mux RX Channel #3 Data Phase
Flex Mux RX Channel #4 Enable
Flex Mux RX Channel #4 Data Rate
Flex Mux RX Channel #4 Clock Phase
Flex Mux RX Channel #4 Data Phase
Demodulator Frequency
Demodulator Rate
Descrambler Enable
Differential Decoder
RF Loopback
IF Loopback
Sweep Center Frequency
Sweep Width Range
(Note 1)
(Note 2)
(Note 1)
(Note 1)
(Note 3)
(Note 3)
(Note 3)
(Note 1)
(Note 4)
(Note 4)
(Note 4)
DF_nnn.nnnnnn'cr'
DR_nnnn_mmmm.mmm'cr'
DE_xxx'cr'
DDEC_xxx'cr'
RFL_xxx'cr'
IFL_xxx'cr'
SCF_snnnnn'cr'
SWR_nnnnn'cr'
SR_xxx'cr'
A–15
SNM-1002 LinkSync Modem
Remote Control Operation
Revision 2
MN/SNM1002.OM
ILT_xxx'cr'
ERF_nnnnn.n'cr'
BC_xxx'cr'
RCP_xxxx'cr'
BBL_xxx'cr'
ILB_xxx'cr'
ILT_xxx'cr'
ICFR_xxxx'cr'
IRFS_T1_ssss'cr'
IRFS_E1_ssss'cr'
IBP_xxx'cr'
IRE_xxxxxx'cr'
RDF_xxxx'cr'
ISCL_RX1_nnn'cr'
ISCL_RX2_nnn'cr'
RDP_xxxx'cr'
IDF_xxxxxx'cr'
(Note 5)
ICRC_xxx'cr'
(Note 5)
IBS_nnnnnn'cr'
BICA_dd;cc_dd;cc...'cr'
(Note 5)
DSR_xxx'cr'
RSDE_xxx'cr'
BW_RX1_nnn'cr' (Note 6)
BW_RX2_nnn'cr' (Note 6)
BW_RX3_nnn'cr' (Note 6)
BW_RX4_nnn'cr' (Note 6)
RXDR_xxxxxx'cr'
ROBR_nnnnn'cr' (Note 7)
RCCL_n'cr'
(Note 7)
RCSB_n'cr'
(Note 7)
ROCP_xxxx'cr' (Note 7)
RCT_xxxxx'cr'
(Note 7)
ENSP_nn.n'cr'
(Note 8)
MAXT_n.n'cr'
(Note 8)
RDA_xxx'cr'
RET_xxxxx'cr'
(Note 6)
RRSI_xx'cr'
R310_xxx'cr''lf']
Sweep Reacquisition
Interface Loop Timing
External Reference Frequency
Buffer Clock
Receive Clock Phase
Baseband Loopback
Interface Loopback
Interface Loop Timing
Interface Coding Format Receive
Interface Receive T1 Frame Structure
Interface Receive E1 Frame Structure
Interface Buffer Programming
Interface Read Error (RX 2047)
Receive Data Fault
Service Channel Level RX1
Service Channel Level RX2
Receive Data Phase
Insert Data Format
Insert E1 CRC Enable
Interface Buffer Size
Bulk Insert Channels Assignment
Demodulator Spectrum Rotation
Reed-Solomon Decoder
Backward Alarm Enable RX1
Backward Alarm Enable RX2
Backward Alarm Enable RX3
Backward Alarm Enable RX4
RX Driver Type
ASYNC Receive Overhead Baud Rate
ASYNC Receive Channel Character Length
ASYNC Receive Channel Stop Bits
ASYNC Receive Overhead Channel Parity
ASYNC Receive Communications Type
AUPC EBN0 Target Set Point
AUPC Max. Tracking Rate
Receive BPSK Data Ordering
IDR Receive ESC Type
RX Reed-Solomon Interleave Value
RX 8PSK 2/3 IESS-310 Operation
This command is used by the Adaptive
Boradband M:N protection switch to collect
information that is necessary to configure
back-up modems. Because this command
(content and/or order) can be changed at
any time by Adaptive Boradband, it is
advisable that other commands ('DCS_' and
'ICS_', or 'BCS_') be used for M&C systems.
A–16
SNM-1002 LinkSync Modem
Remote Control Operation
Revision 2
MN/SNM1002.OM
Notes:
1.
2.
3.
4.
5.
6.
7.
8.
Interface
Config.
Status
Command:
Response:
<add/ICS_'cr'
>add/ICS_'cr'
TC_xxxx'cr'
ERF_nnnnn.n'cr'
TCP_xxxx'cr'
RCP_xxxx'cr'
BBL_xxx'cr'
ILB_xxx'cr'
ILT_xxx'cr'
ICFT_xxxx'cr'
ICFR_xxxx'cr'
BC_xxx'cr'
IRFS_T1_ssss'cr'
IRFS_E1_ssss'cr'
IBP_xxx'cr'
IBS_nnnnnn'cr'
ITOT_xxxxx'cr'
IROT_xxxxx'cr'
ISP_xxxxxx'cr'
IRE_xxxxxx'cr'
TDF_xxxx'cr'
RDF_xxxx'cr'
ISCL_TX1_nnn'cr'
ISCL_TX2_nnn'cr'
ISCL_RX1_nnn'cr'
ISCL_RX2_nnn'cr'
TDP_xxxx'cr'
RDP_xxxx'cr'
DDF_xxxxxx'cr' (Note 1)
BDCA_dd;cc_dd;cc...'cr' (Note 1)
ICRC_xxx'cr'
(Note 2)
IDF_xxxxxx'cr'
(Note 2)
BICA_dd;cc_dd;cc...'cr'
(Note 2)
BW_TX1_nnn'cr' (Note 3)
BW_TX2_nnn'cr' (Note 3)
BW_TX3_nnn'cr' (Note 3)
BW_TX4_nnn'cr' (Note 3)
BW_RX1_nnn'cr' (Note 4)
BW_RX2_nnn'cr' (Note 4)
BW_RX3_nnn'cr' (Note 4)
BW_RX4_nnn'cr' (Note 4)
TXDR_xxxxxx'cr'
A–17
Data is only returned if FLEX MUX PCB (Card Slot
#1) is installed.
Data not returned if Channel #1 is disabled.
Data not returned if Channel #3 is disabled or set
for AUPC.
Data not returned if Channel #4 is disabled or set
for AUPC.
Data is only returned for RX D&I Overhead
(or Flex Mux D&I mode).
Data is only returned for RX IDR Overhead.
Data is only returned for RX ASYNC
Overhead.
Data is only returned for RX ASYNC Overhead (or
Flex Mux AUPC mode).
Transmit Clock (Source)
External Reference Frequency
Transmit Clock Phase
Receive Clock Phase
Baseband Loopback
Interface Loopback
Interface Loop Timing
Interface Coding Format Transmit
Interface Coding Format Receive
Buffer Clock (Source)
Interface Receive Frame Structure (T1)
Interface Receive Frame Structure (E1)
Interface Buffer Programming
Interface Buffer Size
Interface Transmit Overhead Type
Interface Receive Overhead Type
Interface Substitution Pattern (TX 2047)
Interface Read Error (RX 2047)
Transmit Data Fault
Receive Data Fault
Service Channel Level TX1
Service Channel Level TX2
Service Channel Level RX1
Service Channel Level RX2
Transmit Data Phase
Receive Data Phase
Drop Data Format
Bulk Drop Channels Assignment
Insert E1 CRC Enable
Insert Data Format
Bulk Insert Channels Assignment
Backward Alarm Enable TX1
Backward Alarm Enable TX2
Backward Alarm Enable TX3
Backward Alarm Enable TX4
Backward Alarm Enable RX1
Backward Alarm Enable RX2
Backward Alarm Enable RX3
Backward Alarm Enable RX4
TX Driver Type
SNM-1002 LinkSync Modem
Remote Control Operation
RXDR_xxxxxx'cr'
TOBR_nnnnn'cr' (Note 5)
TCCL_n'cr'
(Note 5)
TCSB_n'cr'
(Note 5)
TOCP_xxxx'cr' (Note 5)
TCT_xxxxx'cr'
(Note 5)
ROBR_nnnnn'cr' (Note 6)
RCCL_n'cr'
(Note 6)
RCSB_n'cr'
(Note 6)
ROCP_xxxx'cr' (Note 6)
RCT_xxxxx'cr'
(Note 6)
LPC_xxx'cr'
(Note 5)
NOMP_snn.n'cr' (Note 5)
MINP_snn.n'cr' (Note 5)
MAXP_snn.n'cr' (Note 5)
LCL_xxxx'cr'
(Note 5)
RCL_xxxx'cr'
(Note 5)
ENSP_nn.n'cr'
(Note 6)
MAXT_n.n'cr'
(Note 6)
RTSM_xxx'cr'
CTSD_xx'cr'
TET_xxxxx'cr'
(Note 3)
RET_xxxxx'cr'
(Note 4)
MTDR_1_yyyyyy'cr'
MTIT_1_yyyyy'cr' (Note 7)
MTCP_1_yyy'cr' (Note 7)
MTDP_1_yyy'cr' (Note 7)
MTMD_1_yyyyy'cr'
MTAF_1_yyy'cr' (Note 7)
MTDR_2_yyyyyy'cr'
MTIT_2_yyyyy'cr' (Note 7)
MTCP_2_yyy'cr' (Note 7)
MTDP_2_yyy'cr' (Note 7)
MTMD_2_yyyyy'cr'
MTAF_2_yyy'cr' (Note 7)
MTDR_3_yyyyyy'cr'
MTIT_3_yyyyy'cr' (Note 7)
MTCP_3_yyy'cr' (Note 7)
MTDP_3_yyy'cr' (Note 7)
MTMD_3_yyyyy'cr'
MTAF_3_yyy'cr' (Note 7)
MTDR_4_yyyyyy'cr'
MTIT_4_yyyyy'cr' (Note 7)
MTCP_4_yyy'cr' (Note 7)
MTDP_4_yyy'cr' (Note 7)
MTMD_4_yyyyy'cr'
MTAF_4_yyy'cr' (Note 7)
MTDR_5_yyyyyy'cr'
MTIT_5_yyyyy'cr' (Note 7)
MTCP_5_yyy'cr' (Note 7)
MTDP_5_yyy'cr' (Note 7)
MTMD_5_yyyyy'cr'
MTAF_5_yyy'cr' (Note 7)
MTDR_6_yyyyyy'cr'
MTIT_6_yyyyy'cr' (Note 7)
MTCP_6_yyy'cr' (Note 7)
MTDP_6_yyy'cr' (Note 7)
MTMD_6_yyyyy'cr'
MTAF_6_yyy'cr' (Note 7)
MTDR_7_yyyyyy'cr'
Revision 2
MN/SNM1002.OM
(Note 7)
(Note 7)
(Note 7)
(Note 7)
(Note 7)
(Note 7)
(Note 7)
(Note 7)
(Note 7)
(Note 7)
(Note 7)
(Note 7)
(Note 7)
A–18
RX Driver Type
ASYNC Transmit Overhead Baud Rate
ASYNC Transmit Channel Character Length
ASYNC Transmit Channel Stop Bits
ASYNC Transmit Overhead Channel Parity
ASYNC Transmit Communications Type
ASYNC Receive Overhead Baud Rate
ASYNC Receive Channel Character Length
ASYNC Receive Channel Stop Bits
ASYNC Receive Overhead Channel Parity
ASYNC Receive Communications Type
AUPC Local Power Enable
AUPC Nominal Power Value
AUPC Minimum Power Value
AUPC Maximum Power Value
AUPC Local Carrier Loss
AUPC Remote Carrier Loss
AUPC EBN0 Target Set Point
AUPC Max. Tracking Rate
RTS TX-IF Control Mode
CTS Delay Time
IDR Transmit ESC Type
IDR Receive ESC Type
Mux Tributary #1 Data Rate & Enable
Mux Tributary #1 Interface Type
Mux Tributary #1 Clock Phase
Mux Tributary #1 Data Phase
Mux Tributary #1 Mode
Mux Tributary #1 Async Mode
Mux Tributary #2 Data Rate & Enable
Mux Tributary #2 Interface Type
Mux Tributary #2 Clock Phase
Mux Tributary #2 Data Phase
Mux Tributary #2 Mode
Mux Tributary #2 Async Mode
Mux Tributary #3 Data Rate & Enable
Mux Tributary #3 Interface Type
Mux Tributary #3 Clock Phase
Mux Tributary #3 Data Phase
Mux Tributary #3 Mode
Mux Tributary #3 Async Mode
Mux Tributary #4 Data Rate & Enable
Mux Tributary #4 Interface Type
Mux Tributary #4 Clock Phase
Mux Tributary #4 Data Phase
Mux Tributary #4 Mode
Mux Tributary #4 Async Mode
Mux Tributary #5 Data Rate & Enable
Mux Tributary #5 Interface Type
Mux Tributary #5 Clock Phase
Mux Tributary #5 Data Phase
Mux Tributary #5 Mode
Mux Tributary #5 Async Mode
Mux Tributary #6 Data Rate & Enable
Mux Tributary #6 Interface Type
Mux Tributary #6 Clock Phase
Mux Tributary #6 Data Phase
Mux Tributary #6 Mode
Mux Tributary #6 Async Mode
Mux Tributary #7 Data Rate & Enable
SNM-1002 LinkSync Modem
Remote Control Operation
Revision 2
MN/SNM1002.OM
MTIT_7_yyyyy'cr' (Note 7)
MTCP_7_yyy'cr' (Note 7)
MTDP_7_yyy'cr' (Note 7)
MTMD_7_yyyyy'cr'
(Note 7)
MTAF_7_yyy'cr' (Note 7)
MTDR_8_yyyyyy'cr'
(Note 7)
MTIT_8_yyyyy'cr' (Note 7)
MTCP_8_yyy'cr' (Note 7)
MTDP_8_yyy'cr' (Note 7)
MTMD_8_yyyyy'cr'
(Note 7)
MTAF_8_yyy'cr' (Note 7)
TCEN_1_xxxx'cr'
TCDR_1_xxxx.x'cr'
TCEN_2_xxx'cr'
TCEN_3_xxxx'cr'
TCDR_3_xxxx.x'cr'
TCCP_3_yyy'cr'
TCDP_3_yyy'cr'
TCEN_4_xxxx'cr'
TCDR_4_xxxx.x'cr'
TCCP_4_yyy'cr'
TCDP_4_yyy'cr'
RCEN_1_xxxx'cr'
RCDR_1_xxxx.x'cr'
RCEN_2_xxx'cr'
RCEN_3_xxxx'cr'
RCDR_3_xxxx.x'cr'
RCCP_3_yyy'cr'
RCDP_3_yyy'cr'
RCEN_4_xxxx'cr'
RCDR_4_xxxx.x'cr'
RCCP_4_yyy'cr'
RCDP_4_yyy'cr'
(Note 8)
(Note 9)
(Note 8)
(Note 8)
(Note 10)
(Note 10)
(Note 10)
(Note 8)
(Note 11)
(Note 11)
(Note 11)
(Note 8)
(Note 12)
(Note 8)
(Note 8)
(Note 13)
(Note 13)
(Note 13)
(Note 8)
(Note 14)
(Note 14)
(Note 14)
'lf']
Mux Tributary #7 Interface Type
Mux Tributary #7 Clock Phase
Mux Tributary #7 Data Phase
Mux Tributary #7 Mode
Mux Tributary #7 Async Mode
Mux Tributary #8 Data Rate & Enable
Mux Tributary #8 Interface Type
Mux Tributary #8 Clock Phase
Mux Tributary #8 Data Phase
Mux Tributary #8 Mode
Mux Tributary #8 Async Mode
Flex Mux TX Channel #1 Enable
Flex Mux TX Channel #1 Data Rate
Flex Mux TX Channel #2 Enable
Flex Mux TX Channel #3 Enable
Flex Mux TX Channel #3 Data Rate
Flex Mux TX Channel #3 Clock Phase
Flex Mux TX Channel #3 Data Phase
Flex Mux TX Channel #4 Enable
Flex Mux TX Channel #4 Data Rate
Flex Mux TX Channel #4 Clock Phase
Flex Mux TX Channel #4 Data Phase
Flex Mux RX Channel #1 Enable
Flex Mux RX Channel #1 Data Rate
Flex Mux RX Channel #2 Enable
Flex Mux RX Channel #3 Enable
Flex Mux RX Channel #3 Data Rate
Flex Mux RX Channel #3 Clock Phase
Flex Mux RX Channel #3 Data Phase
Flex Mux RX Channel #4 Enable
Flex Mux RX Channel #4 Data Rate
Flex Mux RX Channel #4 Clock Phase
Flex Mux RX Channel #4 Data Phase
The Interface configuration status command
causes a block of data to be returned by the
addressed MODEM. The block reflects the
current configuration of the interface.
Additional configuration status of new options
and features will always be appended to the
end.
Notes:
1. Data is only returned for TX D&I Overhead.
2. Data is only returned for RX D&I Overhead.
3. Data is only returned for TX IDR Overhead.
4. Data is only returned for RX IDR Overhead.
5. Data is only returned for TX ASYNC
Overhead.
6. Data is only returned for RX ASYNC
Overhead.
Data is only returned if MUX PCB (Card Slot
#1) is installed.
8.
Data is only returned if FLEX MUX PCB (Card Slot
#1) is installed.
9. Data not returned if TX Channel #1 is disabled.
10. Data not returned if TX Channel #3 is disabled or
set for AUPC.
11. Data not returned if TX Channel #4 is disabled or
set for AUPC.
12. Data not returned if RX Channel #1 is disabled.
A–19
SNM-1002 LinkSync Modem
Remote Control Operation
Revision 2
MN/SNM1002.OM
13. Data not returned if RX Channel #3 is disabled or
set for AUPC.
14. Data not returned if RX Channel #4 is
disabled or set for AUPC.
MODEM
Faults Status
(Summary)
Command:
Response:
Modulator
Status
Command:
Response:
Demodulator
Status
Interface
Transmit
Side Status
Command:
Response:
Command:
Response:
<add/MFS_'cr'
>add/MFS_'cr'
DMD_xxx'cr'
MOD_xxx'cr'
TX_xxx'cr'
IRX_xxx'cr'
CEQ_xxx'cr'
BWAL_xxx'cr'’lf']
Demodulator (FLT/OK)
Modulator (FLT/OK)
Interface Transmit Side (FLT/OK)
Interface Receive Side (FLT/OK)
Common Equipment (FLT/OK)
Backward Alarms (FLT/OK)
<add/MS_'cr'
>add/MS_'cr'
RF_xxx'cr'
MOD_xxx'cr'
SYN_xxx'cr'
DCS_xxx'cr'
ICH_xxx'cr'
QCH_xxx'cr'
AGC_xxx'cr'
SCT_xxx'cr'
EXT_xxx'cr'
CONF_xxx'cr'
SFLT_xx'cr''lf']
RF Output (ON/OFF) actual status not config
Module (OK/FLT)
IF Synthesizer (OK/FLT)
Data Clock Synthesizer (OK/FLT)
I Channel (OK/FLT)
Q Channel (OK/FLT)
AGC Level (OK/FLT)
Modem Reference PLL Lock (OK/FLT)
Modem Reference Activity (OK/FLT)
Configuration (OK/FLT)
Number of stored faults logged (0 to 10)
<add/DS_'cr'
>add/DS_'cr'
MOD_xxx'cr'
CD_xxx'cr'
SYN_xxx'cr'
ICH_xxx'cr'
QCH_xxx'cr'
BERT_xxx'cr'
CONF_xxx'cr'
SFLT_xx'cr''lf']
Demod Module (OK/FLT)
Carrier Detect (OK/FLT)
IF Synthesizer Lock (OK/FLT)
I Channel (OK/FLT)
Q Channel (OK/FLT)
BER Threshold (OK/FLT)
Configuration (OK/FLT)
Number of stored faults logged (0 to 10)
<add/ITXS_'cr'
>add/ITXS_'cr'
DRP_xxx'cr'
TXD_xxx'cr'
PLL_xxx'cr'
CLK_xxx'cr'
TAC1_xxx'cr'
TAC2_xxx'cr'
CONF_xxx'cr'
SFLT_xx'cr''lf']
D&I Drop (OK/FLT)
Transmit Data/AIS (OK/FLT)
Transmit Synthesizer PLL Lock (OK/FLT)
Selected Transmit Clock Activity (OK/FLT)
Transmit Audio Clip Channel #1 (OK/FLT)
Transmit Audio Clip Channel #2 (OK/FLT)
Configuration (OK/FLT)
Number of Stored Faults Logged (0 to 10)
A–20
SNM-1002 LinkSync Modem
Remote Control Operation
Interface
Receive Side
Status
Command:
Response:
Common
Equipment
Status
Command:
Response:
Revision 2
MN/SNM1002.OM
<add/IRXS_'cr'
>add/IRXS_'cr'
UNFL_xxx'cr'
OVFL_xxx'cr'
RXD_xxx'cr'
FBER_xxx'cr'
BWA_xxx'cr'
CLK_xxx'cr'
PLL_xxx'cr'
DMUX_xxx'cr'
2047_xxx'cr'
BUFF_xxx'cr'
INS_xxx'cr'
RAC1_xxx'cr'
RAC2_xxx'cr'
CONF_xxx'cr'
SFLT_xx'cr''lf']
Buffer Underflow (OK/FLT)
Buffer Overflow (OK/FLT)
Receive Data Loss/AIS (OK/FLT)
Frame BER (OK/FLT)
Receive Backward Alarm (OK/FLT)
Selected Buffer Clock Activity (OK/FLT)
Buffer Clock PLL Lock (OK/FLT)
Demux Lock (OK/FLT)
2047 Pattern Lock Detect (OK/FLT)
Buffer Full (OK/FLT)
D&I Insert (OK/FLT)
Receive Audio Clip Channel #1 (OK/FLT)
Receive Audio Clip Channel #2 (OK/FLT)
Configuration (OK/FLT)
Number of Stored Faults Logged (0 to 10)
<add/CES_'cr'
>add/CES_'
M&C_xxx'cr'
INT_xxx'cr'
BAT_xxx'cr'
+5_xxx'cr'
+12_xxx'cr'
-12_xxx'cr'
ST_xxx'cr'
MODE_xxxxxx'cr'
SFLT_xx'cr''lf']
Monitor & Control Module (OK/FLT)
Data Interface/Overhead Module (OK/FLT)
Battery/Clock (OK/FLT)
+5V Power Supply (OK/FLT)
+12V Power Supply (OK/FLT)
-12V Power Supply (OK/FLT)
Self Test (OK/FLT)
Mode (LOCAL or REMOTE)
Number of stored faults logged (0 to 10)
The common equipment status command causes
a block of data to be returned which indicates the
status of the common equipment.
A.4.1
Raw BER
Error Performance
Command:
Response:
<add/RBER_'cr'
>add/RBER_xm.mE-ee'cr''lf']
Where:
x = < or > (data modifier to indicate that the error
rate is less than or greater than the returned
value).
m.m = 1.0 to 9.9 (error rate mantissa).
ee = 1 to 99 (error rate exponent).
Notes:
1.
The 'x' (< or >) parameter is only
returned if the error rate has exceeded the
computational resolution of the system.
2.
'No Data' is returned if the error rate
cannot be calculated.
3.
'Sampling' is returned if not enough data
is currently available to calculate the error rate.
A–21
SNM-1002 LinkSync Modem
Remote Control Operation
Corrected
BER
Command:
Response:
Revision 2
MN/SNM1002.OM
<add/CBER_'cr'
>add/CBER_xm.mE-ee'cr''lf']
Where:
x = < or > (data modifier to indicate that the error
rate is less than or greater than the returned
value).
m.m = 1.0 to 9.9 (error rate mantissa).
ee = 1 to 99 (error rate exponent).
Notes:
1.
The 'x' (< or >) parameter is only
returned if the error rate has exceeded the
computational resolution of the system.
2.
'No Data' is returned if the error rate
cannot be calculated.
3.
'Sampling' is returned if not enough data
is currently available to calculate the error rate.
Corrected
BER Log
Command:
Response:
Examples:
<add/CBEL_'cr'
>add/CBEL_t.t;s1,s2,s3 ... sn'cr''lf']
[No new compiled data from last
poll]
>add/CBEL_1.0'cr''lf']
Where:
t.t = Time between corrected BER samples in
seconds ('0.1' to '9.9').
; = At least one data point has been logged.
[Momentary lock in 32 time intervals:
2.0E-3, 5.2E-7, 1.0E-10, <1.0E-12]
s1 to sn = Corrected BER samples in the format
of (xmmee).
>add/CBEL_1.0;,,,,,,,2003,5207,101
0,<1012,,,,,,,,,,,,,,,,,,,,,'cr''lf']
x = The optional data modifier '<' or '>' (less than
or greater than).
mm = The corrected BER mantissa ('10' for 1.0
to '99 for 9.9).
ee = The corrected BER negative exponent ('00'
to '99').
Error data (samples) are compiled at the nominal
system rate indicated by the time parameter (t.t).
The samples are stored in a thirty-two-element
FIFO. When the 'CBEL_' command is received,
the samples in the FIFO are formatted and
returned as indicated.
The FIFO is then
flushed. If the FIFO becomes full, the oldest
sample will be lost as the current sample is
written.
Notes:
1.
The most recent sample is represented
by 'sn' while the least recent sample is
represented by 's1'.
2.
Data delimited by a comma (',') will be
returned for all time intervals logged.
3.
The optional data modifiers '>' and '<'
are only present if the error rate exceeds the
computational resolution of the system.
A–22
SNM-1002 LinkSync Modem
Remote Control Operation
Interface
Read Error
Status
Command:
Response:
Revision 2
MN/SNM1002.OM
<add/IRES_'cr'
>add/IRES_tttt_xn.nE-ee'cr''lf']
Where:
tttt = FRM (FRAME) or 2047 (indicates type of
error being read).
x = < or > (data modifier to indicate that the error
rate is less than or greater than the returned
value).
m.m = 1.0 to 9.9 (error rate mantissa).
ee = 1 to 99 (error rate exponent).
This command returns frame or 2047 error rate.
The 'IRE_' configuration command is used to
select reading of frame or 2047 errors.
Notes:
1.
The 'x' (< or >) parameter is only
returned if the error rate has exceeded the
computational resolution of the system.
2.
'No Data' is returned if the error rate
cannot be calculated.
3.
'Sampling' is returned if not enough data
is currently available to calculate the error rate.
Eb/N0
Status
Command:
Response:
Where:
<add/EBN0_'cr'
>add/EBN0_xnn.ndB'cr''lf']
x = < or > (data modifier to indicate that the
Eb/N0 is less than or greater than the returned
value).
nn.n = 1.0 to 99.9 (Eb/N0 value).
Notes:
1.
The 'x' (< or >) parameter is only
returned if the Eb/N0 has exceeded the
computational resolution of the system.
2.
'No Data' is returned if the Eb/N0 cannot
be calculated.
3.
'Sampling' is returned if not enough data
is currently available to calculate the Eb/N0.
Modulator
Rate
Status
Command:
Response:
<add/MR_'cr'
>add/MR_nnnn_mmmm.mmm'cr''lf']
Where:
nnnn = 1/2 (QPSK 1/2), [coder rate], 3/4 (QPSK
3/4), 7/8 (QPSK 7/8), BP12 (BPSK 1/2), 8P23
(8PSK 2/3).
mmmm.mmm = Data rate in kHz.
Demodulat
or Rate
Status
Command:
Response:
<add/DR_'cr'
>add/DR_nnnn_mmmm.mmm'cr''lf']
Where:
nnnn = 1/2 (QPSK 1/2), [decoder rate], 3/4
(QPSK 3/4), 7/8 (QPSK 7/8), BP12 (BPSK 1/2),
8P23 (8PSK 2/3).
mmmm.mmm = Data rate in kHz.
A–23
SNM-1002 LinkSync Modem
Remote Control Operation
Receive
Signal
Level
Status
Command:
Response:
Revision 2
MN/SNM1002.OM
<add/RSL_'cr'
>add/RSL_xsnn.ndBm'cr''lf']
Where:
x = < or > (data modifier to indicate that the
receive signal level is less than or greater than
the returned value).
s = + or - (receive signal level sign, plus or
minus).
nn.n = 0.0 to 99.9 (receive signal level
magnitude).
Notes:
1.
The 'x' (< or >) parameter is only
returned if the level has exceeded the
computational resolution of the system.
2.
'No Data' is returned if the level cannot
be calculated.
3.
Sampling' is returned if not enough data
is currently available to calculate the level.
Interface
Buffer Fill
Status
Current
Sweep
Value
Command:
Response:
<add/IBFS_'cr'
>add/IBFS_nn%'cr''lf']
Where: nn = 1 to 99 (relative to buffer depth).
Command:
Response:
<add/CSV_'cr'
>add/CSV_xsnnnnn'cr''lf]
Where:
x = < or > (data modifier to indicate that the
sweep offset value is less than or greater than
the returned value).
s = + or - (sweep offset from center).
nnnnn = 0 to 35000.
yyy = OK or FLT (decoder lock status OK or
FAULT).
Notes:
1.
The 'x' (< or >) parameter is only
returned if the level has exceeded the
computational resolution of the system.
2.
'No Data' is returned if the level cannot
be calculated.
3.
'Sampling' is returned if not enough data
is currently available to calculate the level.
A–24
SNM-1002 LinkSync Modem
Remote Control Operation
A.5
Revision 2
MN/SNM1002.OM
Stored Faults
Information on stored faults is returned when requested. If no stored fault exists for a
given fault number, the words “NO Fault” will be returned instead of the normal
time/date status information.
The following symbols are commonly used to define the stored faults status commands:
•
•
•
•
•
•
•
#
hh
mm
ss
MM
DD
YYYY
Modulator
Stored
Faults
Command:
Response:
Demodulator
Stored
Faults
Command:
Response:
Interface
Transmit
Side Stored
Faults
Command:
Response:
Fault number (0 to 9). “0” is the first fault stored.
Hours in 24-hr. format.
Minutes.
Seconds.
Month.
Day.
Year.
<add/MSF_#'cr'
>add/MSF_# hh:mm:ss
MM/DD/YYYYY'cr'
MOD_xxx'cr'
SYN_xxx'cr'
DCS_xxx'cr'
ICH_xxx'cr'
QCH_xxx'cr'
AGC_xxx'cr'
SCT_xxx'cr'
EXT_xxx'cr'
CONF_xxx'cr''lf']
Module (OK/FLT)
IF Synthesizer (OK/FLT)
Data Clock Synthesizer (OK/FLT)
I Channel (OK/FLT)
Q Channel (OK/FLT)
AGC Level (OK/FLT)
Modem Reference PLL Lock (OK/FLT)
Modem Reference Activity (OK/FLT)
Configuration (OK/FLT)
<add/DSF_#'cr'
>add/DSF_# hh:mm:ss
MM/DD/YYYY'cr'
MOD_xxx'cr'
CD_xxx'cr'
SYN_xxx'cr'
ICH_xxx'cr'
QCH_xxx'cr'
BERT_xxx'cr'
CONF_xxx'cr''lf']
Demod Module (OK/FLT)
Carrier Detect (OK/FLT)
IF Synthesizer Lock (OK/FLT)
I Channel (OK/FLT)
Q Channel (OK/FLT)
BER Threshold (OK/FLT)
Configuration (OK/FLT)
<add/ITSF_#'cr'
>add/ITSF_# hh:mm:ss
MM/DD/YYYY'cr'
DRP_xxx'cr'
TXD_xxx'cr'
PLL_xxx'cr'
CLK_xxx'cr'
TAC1_xxx'cr'
TAC2_xxx'cr'
CONF_xxx'cr''lf']
D&I Drop (OK/FLT)
Transmit Data/AIS (OK/FLT)
Transmit Synthesizer PLL Lock (OK/FLT)
Selected Transmit Clock Activity (OK/FLT)
Transmit Audio Clip Channel #1 (OK/FLT)
Transmit Audio Clip Channel #2 (OK/FLT)
Configuration (OK/FLT)
A–25
SNM-1002 LinkSync Modem
Remote Control Operation
Interface
Receive Side
Stored
Faults
Command:
Response:
Common
Equipment
Stored
Faults
Command:
Response:
Revision 2
MN/SNM1002.OM
<add/IRSF_#'cr'
>add/IRSF_# hh:mm:ss
MM/DD/YYYY'cr'
UNFL_xxx'cr'
OVFL_xxx'cr'
RXD_xxx'cr'
FBER_xxx'cr'
BWA_xxx'cr'
CLK_xxx'cr'
PLL_xxx'cr'
DMUX_xxx'cr'
2047_xxx'cr'
BUFF_xxx'cr'
INS_xxx'cr'
RAC1_xxx'cr'
RAC2_xxx'cr'
CONF_xxx'cr''lf']
Buffer Underflow (OK/FLT)
Buffer Overflow (OK/FLT)
Receive Data Loss/AIS (OK/FLT)
Frame BER (OK/FLT)
Receive Backward Alarm (OK/FLT)
Selected Buffer Clock Activity (OK/FLT)
Buffer Clock PLL Lock (OK/FLT)
Demux Lock (OK/FLT)
2047 Pattern Lock Detect (OK/FLT)
Buffer Full (OK/FLT)
D&I Insert (OK/FLT)
Receive Audio Clip Channel #1 (OK/FLT)
Receive Audio Clip Channel #2 (OK/FLT)
Configuration (OK/FLT)
<add/CSF_#'cr'
>add/CSF_# hh:mm:ss
MM/DD/YYYY'cr'
M&C_xxx'cr'
INT_xxx'cr'
BAT_xxx'cr'
+5_xxx'cr'
+12_xxx'cr'
-12_xxx'cr'
ST_xxx'cr''lf']
Monitor & Control Module (OK/FLT)
Data Interface/Overhead Module (OK/FLT)
Battery/Clock (OK/FLT)
+5V Power Supply (OK/FLT)
+12V Power Supply (OK/FLT)
-12V Power Supply (OK/FLT)
Self Test (OK/FLT)
A–26
SNM-1002 LinkSync Modem
Remote Control Operation
Revision 2
MN/SNM1002.OM
Bulk
Command:
<add/BCAS_'cr'
Consol.
Response:
>add/BCAS_p1,p2,p3, . . . pn'cr''lf']
Analog
Status
Where 'pn' is the last parameter returned.
This command is similar to the 'BCS_' command, but returns
modem analog parameters. Additional status of new options
and features will always be appended to the end.
Parameter
Number
1
Parameter Name
(Command Reference)
Receive Signal Level
(ref. 'RSL_' command).
2
Raw BER
(ref. 'RBER_' command).
p2 = xm.mE-ee.
3
Corrected BER
(ref. 'CBER_' command).
p3 = xm.mE-ee.
4
Interface Read Error Status
(ref. 'IRES_' command).
p4 = tttt_xm.mE-ee.
5
EB/N0
(ref. 'EBN0_' command).
p5 = xnn.n, EB/N0 in dB.
6
Buffer Fill Status
(ref. 'IBFS_' command).
p6 = nn%, buffer fill status.
Description
p1 = xsnn.n, receive signal level in dBm.
Note: Parameters 2 through 6 are dependent on carrier acquisition, if the decoder is not locked empty data blocks are returned (,,,,,).
Bulk
Consol.
Status
Command:
Response:
<add/BCS_'cr'
>add/BCS_p1,p2,p3, . . . pn'cr''lf']
Where 'pn' is the last parameter returned.
A–27
This command causes bulk modem status to be
returned. To reduce the length of the response,
message parameter data are returned without
identifiers. However, parameter identification can be
determined by order of return. Each status parameter is
terminated with a ',' (comma) except for the last
parameter which has the standard message
termination sequence ('cr''lf']). Most of the data returned
is formatted the same way as the single command
status request (refer to the appropriate portions of this
document in preceding sections). Additional
configuration status of new options and features will
always be appended to the end.
SNM-1002 LinkSync Modem
Remote Control Operation
Revision 2
MN/SNM1002.OM
Parameter
Number
1
Parameter Name
(Command Reference)
Modulator RF output
(ref. 'RF_' command).
2
Modulator IF frequency
(ref. 'MF_' command).
p2 = nnn.nnnnnn, IF frequency in MHz.
3
Modulator rate
(ref. 'MR_' command).
p3 = nnnn_mmmm.mmm, code rate/data rate in kbit/s.
4
Modulator preset 'A' assignment
(ref. 'ARMA_' command).
p4 = nnnn_mmmm.mmm, code rate/data rate in kbit/s.
5
Modulator preset 'B' assignment
(ref. 'ARMB_' command).
p5 = nnnn_mmmm.mmm, code rate/data rate in kbit/s.
6
Modulator preset 'C' assignment
(ref. 'ARMC_' command).
p6 = nnnn_mmmm.mmm, code rate/data rate in kbit/s.
7
Modulator preset 'D'
(ref. 'ARMD_' command).
p7 = nnnn_mmmm.mmm, code rate/data rate in kbit/s.
8
Modulator preset 'V' assignment
(ref. 'ARMV_' command).
p8 = nnnn_mmmm.mmm, code rate/data rate in kbit/s.
9
Modulator power offset
(ref. 'MPO_' command).
p9 = snn.n, modulator power offset in dB.
10
Modulator output power level
(ref. 'MOP_' command).
p10 = snn.n, transmitter output power level in dBm.
11
Scrambler enable
(ref. 'SE_' command).
p11 = n, where 'n' is '0' (off) or '1' (on).
12
Differential encoder enable
(ref. 'DENC_' command).
p12 = n, where 'n' is '0' (off) or '1' (on).
13
Modulator type
(ref. 'MT_' command).
p13 = n, where 'n' is '0' (EFD), '1' (INTL), '3' (FDC), '4'
(CSC), or '6' (SDM51).
14
Modulator encoder type
(ref. 'MET_' command).
p14 = n, where 'n' is '0' ( SEQ), '1' (VIT).
15
Carrier only mode ON/OFF.
p15 = n, where 'n' is '0' (off) or '1' (on).
16
Demodulator IF
(ref. 'DF_' command).
p16 = nnn.nnnnnn, demodulator IF frequency in MHz.
Description
p1 = n, where 'n' is '0' (off) or '1' (on).
A–28
SNM-1002 LinkSync Modem
Remote Control Operation
Revision 2
MN/SNM1002.OM
Bulk Consol.
Status
(continued)
Parameter
Number
17
Parameter Name
(Command Reference)
Demodulator rate
(ref. 'DR_' command).
18
Demodulator preset A
(ref. 'ADRA_' command).
p18 = nnnn_mmmm.mmm, code rate/data rate in kbit/s.
19
Demodulator preset B assignment
(ref. 'ADRB_' command).
p19 = nnnn_mmmm.mmm, code rate/data rate in kbit/s.
20
Demodulator preset C assignment
(ref. 'ADRC_' command).
p20 = nnnn_mmmm.mmm, code rate/data rate in kbit/s.
21
Demodulator preset D assignment
(ref. 'ADRD_' command).
p21 = nnnn_mmmm.mmm, code rate/data rate in kbit/s.
22
Demodulator preset V assignment
(ref. 'ADRV_' command).
p22 = nnnn_mmmm.mmm, code rate/data rate in kbit/s.
23
Descrambler enable
(ref. 'DE_' command).
p23 = n, where 'n' is '0' (off) or '1' (on).
24
Differential decoder
(ref. 'DDEC_' command).
p24 = n, where 'n' is '0' (off) or '1' (on).
25
RF loopback
(ref. 'RFL_' command).
p25 = n, where 'n' is '0' (off) or '1' (on).
26
IF loopback
(ref. 'IFL_' command).
p26 = n, where 'n' is '0' (off) or '1' (on).
27
Sweep center frequency
(ref. 'SCF_' command).
p27 = snnnnn, sweep center frequency in Hertz.
28
Sweep width range
(ref. 'SWR_' command).
p28 = nnnnn, sweep range in Hertz.
29
Sweep reacquisition
(ref. 'SR_' command).
p29 = nnn, reacquisition time in seconds.
30
BER threshold
(ref. 'BERT_' command).
p30 = xxxx, BER threshold.
31
Demodulator type
(ref. 'DT_' command).
p31 = n, where 'n' is '0' (EFD), '1' (INTL), '3' (FDC), or '4'
(CSC).
32
Demodulator decoder type
(ref. 'DDT_' command).
p32 = n, where 'n' is '0' (SEQ), '1' (VIT).
33
34
Description
p17 = nnnn_mmmm.mmm, code rate/data rate in kbit/s.
p33 = n, where 'n' is '0' (INT), '1' (REF), '2' (EXT), or 6
(DATA).
Transmit clock source
(ref. 'TC_' command).
p34 = nnnnn.n, external reference frequency in kHz.
External reference frequency
(ref. 'ERF_' command).
A–29
SNM-1002 LinkSync Modem
Remote Control Operation
Revision 2
MN/SNM1002.OM
Bulk Consol.
Status
(continued)
Parameter
Number
35
Parameter Name
(Command Reference)
Transmit clock phase
(ref. 'TCP_' command).
36
Receive clock phase
(ref. 'RCP_' command).
p36 = n, where 'n' is '0' (NRM), '1' (INV).
37
Baseband loopback
ref. 'BBL_' command).
p37 = n, where 'n' is '0' (off) or '1' (on).
38
Interface loopback
(ref. 'ILB_' command).
p38 = n, where 'n' is '0' (off) or '1' (on).
39
Interface loop timing
(ref. 'ILT_' command).
p39 = n, where 'n' is '0' (off) or '1' (on).
40
TX Interface coding format
(ref. 'ICFT_' command).
p40 = n, where 'n' is '0' (AMI), '2' (B8ZS), or '3' (HDB3).
41
RX Interface coding format
(ref. 'ICFR_' command).
p41 = n, where 'n' is '0' (AMI), '2' (B8ZS), or '3' (HDB3).
42
Buffer clock source
(ref. 'BC_' command).
p42 = n, where 'n' is '0' (INT), '1' (REF), '2' (EXT), '3' (SAT),
'5' (INS).
43
Interface RX-T1 frame structure
(ref. 'IRFS_' command).
p43 = n, where n is '0' (NONE) or '1' (G704).
44
reserved null field.
45
Interface RX-E1 frame structure
(ref. 'IRFS_' command).
46
reserved null field.
47
Interface Buffer Programming
(ref. 'IBP_' command).
p47 = n, where 'n' is '0' (BITS) or '1' (MS).
48
Interface buffer size
(ref. 'IBS_' command).
p48 = nnnnnn, buffer size in bits or milli seconds.
49
Interface transmit overhead type
(ref. 'ITOT_' command).
p49 = n, where 'n' is '0' (NONE), '1' (IDR), '2' (IBS), '3' (DI),
'4' (ASYNC).
50
Interface receive overhead type
(ref. 'IROT_' command).
p50 = n, where 'n' is '0' (NONE), '1' (IDR), '2' (IBS), '3' (DI),
'4' (ASYNC).
51
52
Description
p35 = n, where 'n' is '0' (NRM), '1' (INV), '2' (AUTO).
p45 = n, where n is '0' (NONE) or '1' (G704).
p51 = n, where 'n' is '0' (OFF) or '1' (ON).
Interface substitution pattern
(ref. 'ISP_' command).
p52 = n, where 'n' is '0' (OFF) or '1' (ON).
Interface read error
(ref. 'IRE_' command).
A–30
SNM-1002 LinkSync Modem
Remote Control Operation
Revision 2
MN/SNM1002.OM
Bulk Consol.
Status
(continued)
Parameter
Number
53
Parameter Name
(Command Reference)
Transmit data fault
(ref. 'TDF_' command).
54
Receive data fault
(ref. 'RDF_' command).
p54 = n, where 'n' is '0' (NONE), '1' (DATA), or '2' (AIS).
55
Interface service channel TX1
(ref. 'ISCL_' command).
p55 = nnn, service channel level in dBm.
56
Interface service channel TX2
(ref. 'ISCL_' command).
p56 = nnn, service channel level in dBm.
57
Interface service channel RX1
(ref. 'ISCL_' command).
p57 = nnn, service channel level in dBm.
58
Interface service channel RX2
(ref. 'ISCL_' command).
p58 = nnn, service channel level in dBm.
59
System modem type
(ref. 'SMT_' command).
p59 = n, where 'n' is '0' (IDR), '1' (IBS), ''2' (EFD), 3'
(CUSTOM), '4' (DI), or '5' (ASYNC).
60
Modem operation mode
(ref. 'MOM_' command).
p60 = n, where 'n' is '1' (TX_ONLY), '2' (RX_ONLY), '3'
(DUPLEX).
61
MODEM REMOTE/LOCAL mode.
p61 = n, where 'n' is '0' (LOCAL), '1' (REMOTE).
62
Transmit data phase
(ref. 'TDP_' command).
p62 = n, where 'n' is '0' (NRM), '1' (INV).
63
Receive data phase
(ref. 'RDP_' command).
p63 = n, where 'n' is '0' (NRM), '1' (INV).
(Note 1)
64
Drop Data Format
(ref. 'DDF_' command).
p64 = n, where 'n' is '0' (T1), '1' (T1ESF), '2' (E1CCS), '3'
(E1CAS), '6' (E131TS), '7' (T1S), and '8' (T1ESFS).
(Note 2)
65
Insert Data Format
(ref. 'IDF_' command).
p65 = n, where 'n' is '0' (T1), '1' (T1ESF), '2' (E1CCS), '3'
(E1CAS), '6' (E131TS), '7' (T1S), and '8' (T1ESFS).
(Note 1)
66
Bulk Drop Channels Assignment.
p66 = dd;cc_dd;cc_dd;cc_dd;cc......, as defined by the
BDCA_ command.
(Note 2)
67
Bulk Insert Channels Assignment.
p67 = ii;cc_ii;cc_ii;cc_ii;cc......, as defined by the BICA_
command.
(Note 2)
68
Insert E1 CRC Enable
(ref. 'ICRC_' command).
p68 = n, where 'n' is '0' (off) or '1' (on).
69
70
Description
p53 = n, where 'n' is '0' (NONE), '1' (DATA), or '2' (AIS).
p69 = n, where 'n' is '0' (INT), '1' (EXT1), '2' (EXT5), '3'
(EXT10), or '4' (EXT20), respectively.
Modem Reference Clock
(ref. 'MRC_' command).
p70 = n, where 'n' is '0' (NRM), '1' (INV).
Modulator Spectrum Rotation
(ref. 'MSR_' command).
A–31
SNM-1002 LinkSync Modem
Remote Control Operation
Revision 2
MN/SNM1002.OM
Bulk Consol.
Status
(continued)
Parameter
Number
71
Parameter Name
(Command Reference)
Demodulator Spectrum Rotation
(ref. 'DSR_' command).
72
Reed-Solomon Encoder Enable
(ref. 'RSEN_' command).
p72 = n, where 'n' is '0' (off) or '1' (on).
73
Reed-Solomon Decoder Enable
(ref. 'RSDE_' command).
p73 = n, where 'n' is '0'(OFF), '1' (ON), '2' (CORR_OFF).
(Note 3)
74
Backward Alarm enable TX1
(ref. 'BW_TX1_' command).
p74 = n, where 'n' is '0' (off) or '1' (on).
(Note 3)
75
Backward Alarm enable TX2
(ref. 'BW_TX2_' command).
p75 = n, where 'n' is '0' (off) or '1' (on).
(Note 3)
76
Backward Alarm enable
(ref. 'BW_TX3_' command).
p76 = n, where 'n' is '0' (off) or '1' (on).
(Note 3)
77
Backward Alarm enable TX4
(ref. 'BW_TX4_' command).
p77 = n, where 'n' is '0' (off) or '1' (on).
(Note 4)
78
Backward Alarm enable RX1
(ref. 'BW_RX1_' command).
p78 = n, where 'n' is '0' (off) or '1' (on).
(Note 4)
79
Backward Alarm enable RX2
(ref. 'BW_RX2_' command).
p79 = n, where 'n' is '0' (off) or '1' (on).
(Note 4)
80
Backward Alarm enable RX3
(ref. 'BW_RX3_' command).
p80 = n, where 'n' is '0' (off) or '1' (on).
(Note 4)
81
Backward Alarm enable RX4
(ref. 'BW_RX4_' command).
p81 = n, where 'n' is '0' (off) or '1' (on).
82
TX Driver Type
(ref. 'TXDR_' command).
p82 = n, where 'n' is '0' (G.703), '1' (V.35), '2' (RS422), or '3'
(RS232).
83
RX Driver Type
(ref. 'RXDR_' command).
p83 = n, where 'n' is '0' (G.703), '1' (V.35), '2' (RS422), or '3'
(RS232).
84
reserved null field.
(Note 5)
85
ASYNC TX Overhead Baud Rate
(ref. 'TOBR_' command).
p85 = nnnnn, where 'nnnnn' is the currently programmed
baud rate.
(Note 6)
86
ASYNC RX Overhead Baud Rate
(ref. 'ROBR_' command).
p86 = nnnnn, where 'nnnnn' is the currently programmed
baud rate.
(Note 5)
87
(Note 6)
88
ASYNC TX Channel Char. Length
(ref. 'TCCL_' command).
ASYNC RX Channel Char. Length
(ref. 'RCCL_' command).
A–32
Description
p71 = n, where 'n' is '0' (NRM), '1' (INV).
p87 = n, where 'n' is the currently programmed character
length.
p88 = n, where 'n' is the currently programmed character
length.
SNM-1002 LinkSync Modem
Remote Control Operation
Revision 2
MN/SNM1002.OM
Bulk Consol.
Status
(continued)
(Note 5)
Parameter
Number
89
Parameter Name
(Command Reference)
ASYNC TX Channel Stop
(ref. 'TCSB_' command).
Description
p89 = n, where 'n' is the current number of stop bits
programmed.
(Note 6)
90
ASYNC RX Channel Stop Bits
(ref. 'RCSB_' command).
p90 = n, where 'n' is the current number of stop bits
programmed.
(Note 5)
91
ASYNC TX Channel Parity
(ref. 'TOCP_' command).
p91 = xxxx, where 'xxxx' is the currently programmed parity.
(Note 6)
92
ASYNC RX Channel Parity
(ref. 'ROCP_' command).
p92 = xxxx, where 'xxxx' is the currently programmed parity.
(Note 5)
93
ASYNC TX Communications Type
(ref. 'TCT_' command).
p93 = n, where 'n' is '0' (RS232), '1' (RS485_4WIRE), '2'
(RS485_2WIRE).
(Note 6)
94
ASYNC RX Communications Type
(ref. 'RCT_' command).
p94 = n, where 'n' is '0' (RS232), '1' (RS485).
(Note 14)
95
AUPC Local Power enable ON/OFF
(ref. 'LPC_' command).
p95 = n, where 'n' is '0' (off) or '1' (on).
(Note 14)
96
AUPC Nominal Power Value
(ref. 'NOMP_' command).
p96 = snn.n, where 'snn.n' Nominal Power Value in dBm.
(Note 14)
97
AUPC Minimum Power Value
(ref. 'MINP_' command).
p97 = snn.n, where 'snn.n' Minimum Power Value in dBm.
(Note 14)
98
AUPC Maximum Power Value
(ref. 'MAXP_' command).
p98 = snn.n, where 'snn.n' Maximum Power Value in dBm.
(Note 15)
99
AUPC EBN0 Target Set Point
(ref. 'ENSP_' command).
p99 = nn.n, where 'nn.n' EBN0 Target Set Point in dB.
(Note 15)
100
AUPC Max. Tracking Rate
(ref. 'MAXT_' command).
p100 = n.n, where 'n.n' is the Max. Tracking Rate in dB/Min.
(Note 14)
101
AUPC Local Carrier Loss
(ref. 'LCL_' command).
p101 = n, where 'n' is '0' (HOLD), '1' (NOMINAL), or '2'
(MAXIMUM).
(Note 14
102
AUPC Remote Carrier Loss
(ref. 'RCL_' command).
p102 = n, where 'n' is '0' (HOLD), '1' (NOMINAL), or '2'
(MAXIMUM).
103
reserved null field.
104
reserved null field.
105
106
p105 = n, where 'n' is '0' (NRM), '1' (INV).
Transmit BPSK Data Ordering
(ref. 'TDA_' command).
p106 = n, where 'n' is '0' (NRM), '1' (INV).
Receive BPSK Data Ordering
(ref. 'RDA_' command).
A–33
SNM-1002 LinkSync Modem
Remote Control Operation
Revision 2
MN/SNM1002.OM
Bulk Consol.
Status
(continued)
Paramete
r
Number
107
Parameter Name
(Command Reference)
Description
RTS TX-IF Control Mode
(ref. 'RTSM_' command).
p107 = n, where 'n' is '0' (off) or '1' (on).
108
CTS Delay Time
(ref. 'CTSD_' command).
p108 = nn, CTS delay time in seconds.
109
Carrier Only Mode
(ref. 'COM_' command).
p109 = n, where 'n' is '0' (OFF),'1' (CENTER-CW), '2'
(DUAL-CW) ,'3' (OFFSET-CW).
(Note 3)
110
IDR TX ESC Type
(ref. 'TET_' command).
p110 = n, where 'n' is '0' (AUDIO), '1' (DATA).
(Note 4)
111
IDR RX ESC Type
(ref. 'RET_' command).
p111 = n, where 'n' is '0' (AUDIO), '1' (DATA).
112
TX Reed-Solomon Interleave Value
(ref. 'TRSI_' command).
p112 = nn, Interleave value.
113
RX Reed-Solomon Interleave Value
(ref. 'RRSI_' command).
p113 = nn, Interleave value.
114
reserved null field.
115
reserved null field.
116
reserved null field.
117
TX 8PSK 2/3 IESS-310
Operation
(ref. 'T310_' command).
p117 = n, where 'n' is '0' (off) or '1' (on).
118
p118 = n, where 'n' is '0' (off) or '1' (on).
(Note 7)
119
RX 8PSK 2/3 IESS-310
Operation
(ref. 'R310_' command).
(Note (8)
120
Flex Mux Channel #1 Enable
(ref. "TCEN_1" command).
(Note 7)
(Note 7)
121
p119 = n, where 'n' is '0' (Disabled), '1' (D&I), or '2'
(for T1/E1) operation.
TX Flex Mux Channel #1 Data Rate
(ref. "TCDR_1" command).
p120 = nnnn.n, where 'nnnn.n' is the data rate in
Kbps.
TX Flex Mux Channel #2 Enable
(ref. "TCEN_2" command).
p121 = n, where 'n' is '0' (Disabled), '1' (Enabled).
TX Flex Mux Channel #3 Enable
(ref. "TCEN_3" command).
p122 = n, where 'n' is '0' (Disabled), '1' (Sync RS422),
'2' (Async RS422), '3' (Sync RS232), '4' (Async
RS232), or '5' (AUPC operation).
122
A–34
SNM-1002 LinkSync Modem
Remote Control Operation
Revision 2
MN/SNM1002.OM
Bulk Consol.
Status
(continued)
Parameter Name
(Command Reference)
(Note 9)
Paramete
r
Number
123
TX Flex Mux Channel #3 Data Rate
(ref. "TCDR_3" command).
p123 = nnnn.n, where 'nnnn.n' is the data rate in Kbps.
(Note 9)
124
TX Flex Mux Channel #3 Clock Phase
(ref. "TCCP_3" command).
p124 = n, where 'n' is '0' (Normal) or '1' (Invert).
(Note 9)
125
TX Flex Mux Channel #3 Data Phase
(ref. "TCDP_3" command).
p125 = n, where 'n' is '0' (Normal) or '1' (Invert).
(Note 7)
126
TX Flex Mux Channel #4 Enable
(ref. "TCEN_4" command).
(Note 10)
127
Description
TX Flex Mux Channel #4 Data Rate
(ref. "TCDR_4" command).
TX Flex Mux Channel #4 Clock Phase
(ref. "TCCP_4" command).
(Note 10)
128
p126 = n, where 'n' is '0' (Disabled), '1' (Sync
RS232), '2' (Async RS232), '3' (Async RS485), or
'4' (AUPC operation).
p127 = nnnn.n, where 'nnnn.n' is the data rate in Kbps.
TX Flex Mux Channel #4 Data Phase
(ref. "TCDP_4" command).
p128 = n, where 'n' is '0' (Normal) or '1' (Invert).
RX Flex Mux Channel #1 Enable
(ref. "RCEN_1" command).
p129 = n, where 'n' is '0' (Normal) or '1' (Invert).
RX Flex Mux Channel #1 Data Rate
(ref. "RCDR_1" command).
p130 = n, where 'n' is '0' (Disabled), '1' (D&I), or '2'
(T1/E1 operation).
(Note 10)
129
(Note 7)
130
(Note 11)
131
RX Flex Mux Channel #2 Enable
(ref. "RCEN_2" command).
(Note 7)
132
RX Flex Mux Channel #3 Enable
(ref. "RCEN_3" command).
(Note 7)
133
RX Flex Mux Channel #3 Data Rate
(ref. "RCDR_3" command).
p131 = nnnn.n, where 'nnnn.n' is the data rate in
Kbps.
p132 = n, where 'n' is '0' (Disabled), '1' (Enabled).
(Note 12)
(Note 12)
(Note 12)
134
135
RX Flex Mux Channel #3 Clock Phase
(ref. "RCCP_3" command).
p133 = n, where 'n' is '0' (Disabled), '1' (Sync
RS422), '2' (Async RS422), '3' (Sync RS232), '4'
(Async RS232), or '5' (AUPC operation).
RX Flex Mux Channel #3 Data Phase
(ref. "RCDP_3" command).
p134 = nnnn.n, where 'nnnn.n' is the data rate in Kbps.
RX Flex Mux Channel #4 Enable
(ref. "RCEN_4" command).
p135 = n, where 'n' is '0' (Normal) or '1' (Invert).
RX Flex Mux Channel #4 Data Rate
(ref. "RCDR_4" command).
p136 = n, where 'n' is '0' (Normal) or '1' (Invert).
136
(Note 7)
137
(Note 13)
138
(Note 13)
139
RX Flex Mux Channel #4 Clock Phase
(ref. "RCCP_4" command).
RX Flex Mux Channel #4 Data Phase
(ref. "RCDP_4" command).
p137 = n, where 'n' is '0' (Disabled), '1' (Sync
RS232), '2' (Async RS232), '3' (Async RS485), or
'4' (AUPC operation).
p138 = nnnn.n, where 'nnnn.n' is the data rate in
Kbps.
A–35
SNM-1002 LinkSync Modem
Remote Control Operation
(Note 13)
Revision 2
MN/SNM1002.OM
140
p139 = n, where 'n' is '0' (Normal) or '1' (Invert).
p140 = n, where 'n' is '0' (Normal) or '1' (Invert).
Bulk Consol.
Status
(continued)
Notes:
1. Data will only be returned if TX Overhead is programmed for Drop & Insert. Comma is always returned.
2. Data will only be returned if RX Overhead is programmed for Drop & Insert. Comma is always returned.
3. Data will only be returned if TX Overhead is programmed for IDR. Comma is always returned.
4. Data will only be returned if RX Overhead is programmed for IDR. Comma is always returned.
5. Data will only be returned if TX Overhead is programmed for ASYNC. Comma is always returned.
6. Data will only be returned if RX Overhead is programmed for ASYNC. Comma is always returned.
7. Data is only returned if FLEX MUX PCB (Card Slot #1) is installed. Comma is always returned.
8. Data not returned if TX Channel #1 is disabled. Comma is always returned.
9. Data not returned if TX Channel #3 is disabled or set for AUPC. Comma is always returned.
10. Data not returned if TX Channel #4 is disabled or set for AUPC. Comma is always returned.
11. Data not returned if RX Channel #1 is disabled. Comma is always returned.
12. Data not returned if RX Channel #3 is disabled or set for AUPC. Comma is always returned.
13. Data not returned if RX Channel #4 is disabled or set for AUPC. Comma is always returned (except for last
parameter).
14. Data will only be returned if TX Overhead is programmed for ASYNC. (or TX Flex Mux AUPC). Comma is
always returned.
15. Data will only be returned if RX Overhead is programmed for ASYNC. (or RX Flex Mux AUPC). Comma is
always returned.
A–36
SNM-1002 LinkSync Modem
Remote Control Operation
Bulk
Consolidated
Status
Faults
Command:
Response:
Revision 2
MN/SNM1002.OM
<add/BCSF_'cr'
>add/BCSF_abcdefghijklmnopq
r'cr''lf']
This command causes all modem fault status to be
returned. To reduce the length of the response, fault
status is embedded into the bit structure of the
characters that are returned. Faults are indicated by a
binary 1 in the designated bit position.
Character 'a': Modulator fault status character 1.
Bit 6 = 1 always.
Bit 5 = Modulator module fault.
Bit 4 = RF output status, actual not programmed
status (1 = on, 0 = off).
Bit 3 through Bit 0 = Binary representation (0 to 10) of
the number of modulator stored faults.
Character 'b': Modulator fault status character 2.
Bit 6 = 1 always.
Bit 5 = IF Synthesizer.
Bit 4 = reserved.
Bit 5 = Data Clock Synthesizer.
Bit 2 = I Channel.
Bit 1 = Q Channel.
Bit 0 = AGC Level.
Character 'c': Modulator fault status character 3.
Bit 6 = 1 always.
Bit 5 = Modem Reference PLL Lock.
Bit 4 = reserved.
Bit 3 = Configuration.
Bit 2 = Modem Reference Activity.
Bit 1 = reserved.
Bit 0 = reserved.
Character 'd': Demodulator fault status character 1.
Bit 6 = 1 always.
Bit 5 = Demod module fault.
Bit 4 = Carrier detect status (0 for decoder lock).
Bit 3 through Bit 0 = Binary representation (0 to 10) of
the number of demodulator stored faults.
Character 'e': Demodulator fault status character 2.
Bit 6 = 1 always.
Bit 5 = IF Synthesizer Lock.
Bit 4 = reserved.
Bit 3 = I Channel.
Bit 2 = Q Channel.
Bit 1 = reserved.
Bit 0 = BER threshold.
Character 'f': Demodulator fault status character 3.
Bit 6 = 1 always.
Bit 5 = reserved.
Bit 4 = Configuration.
Bit 3 = reserved.
Bit 2 = reserved.
Bit 1 = reserved.
Bit 0 = reserved.
A–37
SNM-1002 LinkSync Modem
Remote Control Operation
Revision 2
MN/SNM1002.OM
Character 'g': Interface transmit side faults character
1.
Bit 6 = 1 always.
Bit 5 = reserved.
Bit 4 = reserved.
Bit 3 through Bit 0 = Binary representation (0 to 10) of
the number of interface transmit side stored faults.
Character 'h': Interface transmit side faults character
2.
Bit 6 = 1 always.
Bit 5 = Transmit Data/AIS.
Bit 4 = Transmit Synthesizer PLL Lock.
Bit 3 = Selected Transmit Clock Activity.
Bit 2 = reserved.
Bit 1 = Configuration.
Bit 0 = Drop fault.
Character 'i': Interface transmit side faults character 3.
Bit 6 = 1 always.
Bit 5 = TX Audio Channel 1 Clip.
Bit 4 = TX Audio Channel 2 Clip.
Bit 3 = reserved.
Bit 2 = reserved.
Bit 1 = reserved.
Bit 0 = reserved.
Character 'j': Interface receive side faults character 1.
Bit 6 = 1 always.
Bit 5 = Insert fault.
Bit 4 = reserved.
Bit 3 through Bit 0 = Binary representation (0 to 10) of
the number of interface receive side stored faults.
Character 'k': Interface receive side faults character 2.
Bit 6 = 1 always.
Bit 5 = Buffer Underflow.
Bit 4 = Buffer Overflow.
Bit 3 = Receive Data Loss/AIS.
Bit 2 = Frame BER.
Bit 1 = Receive Backward Alarm.
Bit 0 = Selected Buffer Clock Activity.
Character 'l': Interface receive side faults character 3.
Bit 6 = 1 always.
Bit 5 = Buffer Clock PLL Lock.
Bit 4 = Demux Lock.
Bit 3 = 2047 Pattern Lock Detect.
Bit 2 = Buffer Full.
Bit 1 = reserved.
Bit 0 = Configuration.
A–38
SNM-1002 LinkSync Modem
Remote Control Operation
Revision 2
MN/SNM1002.OM
Character 'm': Interface receive side faults character
4.
Bit 6 = 1 always.
Bit 5 = RX Audio Channel 1 Clip.
Bit 4 = RX Audio Channel 2 Clip.
Bit 3 = reserved.
Bit 2 = reserved.
Bit 1 = reserved.
Bit 0 = reserved.
Character 'n': Common equipment fault status
character 1.
Bit 6 = 1 always.
Bit 5 = Monitor & Control Module.
Bit 4 = Interface Module.
Bit 3 through Bit 0 = Binary representation (0 to 10) of
the number of common equipment stored faults.
Character 'o': Common equipment fault status
character 2.
Bit 6 = 1 always.
Bit 5 = Battery/Clock.
Bit 4 = +5V power supply.
Bit 3 = reserved.
Bit 2 = +12V power supply.
Bit 1 = -12V power supply.
Bit 0 = reserved.
Character 'p': Interface backward alarm status
character 1.
Bit 6 = 1 always.
Bit 5 = TX Backward Alarm 1.
Bit 4 = TX Backward Alarm 2.
Bit 3 through Bit 0 = Binary representation (0 to 10) of
the number of backward alarm stored faults.
Character 'q': Interface backward alarm status
character 2.
Bit 6 = 1 always.
Bit 5 = TX Backward Alarm 3.
Bit 4 = TX Backward Alarm 4.
Bit 3 = RX Backward Alarm 1.
Bit 2 = RX Backward Alarm 2.
Bit 1 = RX Backward Alarm 3.
Bit 0 = RX Backward Alarm 4.
Character 'r': Interface Reed-Solomon Unavailable
Seconds
Bit 6 = 1 always.
Bit 5 = not used.
Bit 4 = not used.
Bit 3 through Bit 0 = Binary representation (0 to 10) of
the number of Reed-Solomon Unavailable Seconds
stored faults.
A–39
SNM-1002 LinkSync Modem
Remote Control Operation
Change
Status
Command:
Response:
Revision 2
MN/SNM1002.OM
Where:
<add/CS_'cr'
>add/CS_x'cr''lf']
The 'x' character is defined as follows:
'@' = no change since last BCS_ and BCSF_
polls.
'A' = BCS_ response has changed since last
BCS_ poll.
'B' = BCSF_ response has changed since last
BCSF_ poll.
'C' = Both responses have changed since last
BCS_ and BCSF_ polls.
This command indicates that a change has or
has not occurred on either the BCS_ or the
BCSF_ response since the last BCS_ or BCSF_
poll.
Equipment
Type
Command:
Response:
<add/ET_'cr'
>add/ET_tttttttt_xxx.yyy.zzz'cr''lf']
Where:
tttttttt = Equipment type.
xxx.yyy.zzz = Software version.
Monitor &
Control
Firmware
Information
Command:
Response:
<add/MCFI_'cr'
>add/MCFI_'cr'
VER_xxx.yyy.zzz'cr'
FW/nnnnnn-ddr'cr'
mm/dd/yy'cr''lf']
Where:
xxx.yyy.zzz = Software version number (0.0.0 to
999.999.999).
nnnnnn = Firmware number (0 to 999999).
dd = Firmware dash number (0 to 99).
r = Firmware revision (-, or A to Z).
DATA ROM
Firmware
Information
Command:
Response:
Where:
nnnnnn = Firmware number (0 to 999999).
dd = Firmware dash number (0 to 99).
r = Firmware revision (-, or A to Z).
<add/DFI_'cr'
>add/DFI_'cr'
FW/nnnnnn-ddr'cr'
mm/dd/yy'cr''lf']
Note: If Dash number is not used, '-dd' will be
reported.
Boot M&C
Firmware
Information
Command:
Response:
Where:
<add/BFI_'cr'
>add/BFI_'cr'
VER_xxx.yyy.zzz'cr'
FW/nnnnnn-ddr'cr'
mm/dd/yy'cr''lf']
xxx.yyy.zzz = Software version number (0.0.0 to
999.999.999).
nnnnnn = Firmware number (0 to 999999).
dd = Firmware dash number (0 to 99).
r = Firmware revision (-, or A to Z).
A–40
SNM-1002 LinkSync Modem
Remote Control Operation
Modem
Options/
Misc.
Information
Command:
Response:
Revision 2
MN/SNM1002.OM
<add/MOI_'cr'
>add/MOI_'cr'
s,HGH_PWR'cr'
s,HGH_STAB'cr'
s,ASLT'cr'
s,VIT'cr'
s,SEQ'cr'
s,SR'cr'
s,LRV'cr'
s,FRV'cr'
s,CARD_1_PCB'cr'
s,CARD_2_PCB'cr'
s,CARD_3_PCB'cr'
s,8PSK_2/3'cr'
(0 or +) High Power
(0 or +) High Stability
(- or +) Asymmetrical Loop Timing
(- or +) Viterbi Encoder/Decoder
(- or +) Sequential Encoder/Decoder
(- or +) Single Code/Data Rate
(- or +) Low Rate Variable
(- or +) Full Rate Variable
(x or +) Card #1 Installed
(x or +) Card #2 Installed
(x or +) Card #3 Installed
(- or +) 8PSK 2/3 Code Rate
(0 or +) TX Only Operation
(0 or +) RX Only Operation
s,TX_ONLY'cr'
s,RX_ONLY'cr''lf']
Notes:
1.
2.
3.
4.
Serial
Number
Built In Self
Test
Command:
Response:
Command:
Response:
s = 0 (Not Installed, Not Upgradable).
- (Not Installed, FAST Upgradable).
+ (Installed).
X (Not Installed, Field Upgradable).
<add/SNUM_'cr'
>add/SNUM_'cr'
MODEM_xxxxxxxxx'cr'
CARD_1_xxxxxxxxx'cr'
(Note 1)
CARD_2_xxxxxxxxx'cr'
(Note 2)
CARD_3_xxxxxxxxx'cr''lf']
(Note 3)
Where: xxxxxxxxx = Serial number 000000000 to
999999999.
<add/BIST_xxxx'cr'
for (OFF or AUTO):
>add/BIST_xxxx'cr''lf']
Where: xxxx = OFF (self test disabled), RUN (run self
test now), AUTO (run self test on power up/software
restart).
Notes:
1.
2.
3.
Data is only returned if Card #1 is installed.
Data is only returned if Card #2 is installed.
Data is only returned if Card #3 is installed.
for (RUN):
>add/BIST_xxxx'cr'
ST_xxx'cr''lf']
Self Test (OK/FLT)
Status:
Response:
<add/BIST_xxxx'cr'
>add/BIST_xxxx'cr''lf']
Note: Allow 35 Seconds for response to RUN the Self
Test.
A–41
SNM-1002 LinkSync Modem
Remote Control Operation
State Of
Product
Command:
Response:
<add/SOP_'cr'
>add/SOP_'cr'
add'cr'
abc'cr'
rrrrr bps'cr'
<var-string1>'cr'
<var-string2>'cr''lf']
Revision 2
MN/SNM1002.OM
Product address
Data format
Baud rate
Comm type
Where: abc = Explained below.
a = Number of data bits ( 7 )
b = Parity type (O, E, N)
c = Number of stop bits (2)
rrrrr = baud rate ("150", "300", "600", "1200", "2400",
"4800", "9600", "14.4K", "19.2K").
<var-string1> = Variable length strings explaining
communication hardware type "RS-485, 2 wire", "RS485, 4 wire", "RS-232".
<var_string2> = Variable length strings explaining the
intention of the product. "Under normal system
operation", "REFLASH of BULK firmware required",
"REFLASH of M&C firmware required".
A–42
METRIC CONVERSIONS
Units of Length
Unit
Centimeter
Inch
Foot
Yard
Mile
Meter
Kilometer
Millimeter
1 centimeter
—
0.3937
0.03281
0.01094
6.214 x 10-6
0.01
—
—
1 inch
2.540
—
0.08333
0.2778
1.578 x 10-5
0.254
—
25.4
1 foot
30.480
12.0
—
0.3333
1.893 x 10-4
0.3048
—
—
1 yard
91.44
36.0
3.0
—
5.679 x 10-4
0.9144
—
—
1 meter
100.0
39.37
3.281
1.094
6.214 x 10-4
—
—
—
1 mile
1.609 x 105
6.336 x 104
5.280 x 103
1.760 x 103
—
1.609 x 103
1.609
—
1 mm
—
0.03937
—
—
—
—
—
—
1 kilometer
—
—
—
—
0.621
—
—
—
Temperature Conversions
° Fahrenheit
Unit
° Centigrade
Formulas
0
—
C = (F - 32) * 0.555
(water freezes)
32° Fahrenheit
100
—
F = (C * 1.8) + 32
(water boils)
212° Fahrenheit
273.1
—
(absolute 0)
-459.6° Fahrenheit
Units of Weight
Gram
Ounce
Avoirdupois
Ounce
Troy
Pound
Avoir.
Pound
Troy
Kilogram
—
0.03527
0.03215
0.002205
0.002679
0.001
1 oz. avoir.
28.35
—
0.9115
0.0625
0.07595
0.02835
1 oz. troy
31.10
1.097
—
0.06857
0.08333
0.03110
1 lb. avoir.
453.6
16.0
14.58
—
1.215
0.4536
1 lb. Troy
373.2
13.17
12.0
0.8229
—
0.3732
1 kilogram
1.0 x 103
35.27
32.15
2.205
2.679
—
Unit
1 gram
2114 WEST 7TH STREET TEMPE ARIZONA 85281 USA
480 • 333 • 2200 PHONE
480 • 333 • 2161 FAX
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