Sencore ASM 988A User Manual
ASM 988A USER’S MANUAL
3200 Sencore Drive, Sioux Falls, SD. 57107
1-800-SENCORE
Form 7270
Support and Service information:
Your ASM 988A is a delicate piece of equipment and needs to be serviced and repaired
by SENCORE. For support and service information please address all your calls or mail
to:
SENCORE Inc.
3200 Sencore Drive
Sioux Falls, S.D.
57107
USA
Tel: (605)-339-0100
Fax: (605)-339-0432
WEB site: SENCORE.COM
EMAIL: mail@sencore.com
Copyright Sencore Inc.
October 2002
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TABLE OF CONTENTS
UNIT DESCRIPTION............................................................................................................1
FEATURES ......................................................................... 1
User Interface and Remote Control................................................. 1
Configurable Parameters .......................................................... 1
Monitored Parameters............................................................. 1
FRONT PANEL LAYOUT ................................................................ 2
BACK PANEL LAYOUT................................................................. 2
SPECIFICATIONS ................................................................... 3
8PSK Modulation Parameters ....................................................... 3
QPSK Modulation Parameters ....................................................... 3
ADVANCED QPSK Modulation Parameters ............................................... 3
16QAM Modulation Parameters ...................................................... 3
IF Output Specifications......................................................... 4
General Specifications........................................................... 4
UNIT QUICK SETUP.................................................................. 5
Unpacking and Installation ....................................................... 5
Connecting to the Unit........................................................... 5
UNIT OPERATION ...............................................................................................................6
Turning the Unit On............................................................... 6
Configuring the Unit .............................................................. 6
INPUT SOURCE ..................................................................... 7
PN-23 .......................................................................... 7
Inv PN-23....................................................................... 7
M2P source clock ................................................................ 7
M2P Sink Clock .................................................................. 8
DVB-SPI ........................................................................ 8
ASI Sink Clo ck.................................................................. 8
DVB-ASI ........................................................................ 8
MODULATION FORMAT................................................................. 9
IF FREQUENCY ..................................................................... 9
SYMBOL RATE (SPS)................................................................. 9
PAYLOAD RATE (bits/sec) ........................................................... 9
OUTPUT LEVEL .................................................................... 10
SPECTRUM ........................................................................ 10
ALPHA (Channel Rolloff) .......................................................... 10
CW TEST MODE .................................................................... 10
IF OUTPUT MUTED.................................................................. 11
DELETE SYNC BYTE................................................................. 11
SYSTEM PARAMETERS................................................................ 11
Setting Date ................................................................... 11
Display of system information ................................................... 12
IP Set ........................................................................ 12
Mute on Startup.................................................................. 12
FAULT SETTINGS .................................................................. 13
Reset Fault History Indicator ................................................... 13
Fault Log...................................................................... 13
Relay 1 Settings ............................................................... 13
Relay 2 Settings ............................................................... 14
Relay 3 Settings ............................................................... 14
VIEW FAULTS ..................................................................... 14
RESET SYSTEM .................................................................... 14
SNMP (SIMPLE NETWORK MANAGEMENT PROTOCOL).......................................... 15
LED INDICATORS .................................................................. 16
Status Indicators (3)........................................................... 16
Alarm Indicators (4)............................................................ 16
UNIT MAINTENANCE.......................................................................................................17
SERVICING THE UNIT ............................................................... 17
FAN FILTER CLEANING.............................................................. 17
APPENDIX A: CABLE PINOUTS ......................................................................................18
M2P Transport Stream Input Port................................................... 18
DVB-SPI Transport Stream Input Port ............................................... 19
Alarm Relay Output Port .......................................................... 20
APPENDIX B: SOFTWARE TREE ....................................................................................21
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ASM 988A – Manual
UNIT DESCRIPTION
The ASM 988A is a satellite modulator. This unit uses an advanced coding in the FEC
layer to operate near Shannon’s theoretical limit of bandwidth efficiency. This unit
accepts a M2P, DVB-SPI, DVB-ASI input transport stream and produces up to a 30
Mbaud modulated signal agile about 70 MHz.
FEATURES
User Interface and Remote Control
• Front Panel access (Vacuum-Fluorescent Display and Keypad) to modes, parameters
and status information.
• RS232, and 10BaseT Ethernet connections for configuration, monitoring and control.
• Relay contact outputs for fault monitoring and automated redundancy switch control.
Configurable Parameters
• 8PSK FEC Rates: 2/3, 3/4 (2.05), 3/4 (2.1), 5/6, 8/9
• TURBO QPSK FEC Rates: 1/4, 1/2, 3/4
• 16 QAM FEC Rates: 3/4
• DVB-QPSK FEC Rates: 1/2, 2/3, 3/4, 5/6, 7/8
• DSS-QPSK FEC Rates: 1/2, 2/3, 6/7
• Output Power Attenuation: -5 to –20 dBm
• Input Mode: M2P w/ internal clock, M2P w/ external clock, DVB-SPI, DVB-ASI
w/int clock, DVB-ASI w/ext clock
• Test Modes: PN-23, Inverted PN-23, Inverted PN-23 w/o Sync Byte
• Inpu t Levels: RS422, LVDS
• Input Rate: 0.52 to 85 Mbps (Depending of the modulation modes)
• Modulation Modes 8PSK, 16-QAM, Advanced QPSK, QPSK-DVB, DSS QPSK
• Symbol Rate: 0.256 to 30 MSps, depending on the modulation modes
• Excess Bandwidth (alpha): 0.10 – 0.50 with 0.01 resolution
• Spectral Inversion: on/off
• Output Mute: on/off
Monitored Parameters
• Input Activity
• Supply Voltages
• Temperature
• Fan Operation
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ASM 988A – Manual
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FRONT PANEL LAYOUT
1. Fan Intake with Removable Filter
2. Vacuum-Fluorescent Display (2 lines x 18 characters)
3. Keypad
4. Status LEDs
5. Alarm LEDs
6. Modulator Test Output –20 dB Attenuated Signal Strength (75Ω Terminated)
BACK PANEL LAYOUT
1. DVB-SPI Loopback Output. Available when ASI or M2P is used for input
2. DVB-SPI Input
3. M2P Input
4. DVB-ASI Input
5. Bit Clock Output. This can be used to control the rate of a multiplexer or an
encoder.
6. External 10 MHz Reference Input
7. Fault Alarm Output- Relay output
8. Modulator IF Output (75Ω Terminated)
9. Diagnostic RS232 Serial Port
10. Ethernet Port
11. 110/220 VAC Power Input and ON/OFF switch
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ASM 988A – Manual
SPECIFICATIONS
8PSK Modulation Parameters
FEC ra te FEC 2/3 FEC ¾-I FEC ¾-II FEC 5/6 FEC 8/9
Bit rate in
Mbits/s
Baud rate in
Mbauds
Note: FEC ¾-I represents 2.1 bits/ symbol s and FEC ¾-II represents 2.05 bits/ symbols
• Excess Bandwidth (alpha): 0.1 to 0.5 with 0.01 Resolution
• Spectral Inversion: on/off
QPSK Modulation Parameters
• FEC Code Rates: 1/2, 2/3, 3/4, 5/6, 7/8.
• FEC Modes: As per ETSI EN 300 421 V1.1.2 (DVB)
• Symbol Rate: 0.256 MSps to 30 MSps
• Excess Bandwidth (alpha): 0.1 to 0.5 with 0.01 Resolution
• Spectral Inversion: on/off
ADVANCED QPSK Modulation Parameters
• FEC Code Rates: 1/4, 1/2, 3/4.
• FEC Modes: Turbo Code
• Symbol Rate: 0.256 MSps to 30 MSps
• Excess Bandwidth (alpha): 0.1 to 0.5 with 0.01 Resolution
16QAM Modulation Parameters
• FEC Rate: 3/4
• FEC Mode: Turbo code
• Symbol Rate: 0.256 MSps to 30 MSps
• Excess Bandwidth (alpha): 0.1 to 0.5 with 0.01 Resolution
DSS QPSK Modulation Parameters:
• FEC Rate: 1/2, 2/3, 6/7 FEC Mode
• Symbol Rate: 0.256 MSps to 30 MSps
• Excess Bandwidth (alpha): 0.1 to 0.5 with 0.01 Resolution
0.52 to 57.1 0.55 to 62.8 0.5 to 61.2 .59 to 68.5 0.61 to 71.4
0.256 to 30 0.256 to 30 0.256 to 30 0.256 to 30 0.256 to 30
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ASM 988A – Manual
IF Output Specifications
• Center Frequency: 70MHz
• Agility: +/- 20MHz
• IF Step Size: 1Hz
• Power Attenuation: 5 to –20 dBm
• Power Accuracy: 1 dB
• Phase Noise:
@ 100Hz, -71 dBc
@ 1 kHz, -81 dBc
@ 10 kHz, -91 dBc
@ 100 kHz, -101 dBc
@ 1 MHz, -111 dBc
• Impedance: 75 Ω
General Specifications
• Line Power: 100 – 120/200 - 240 VAC, 60/50 Hz, 200 Watts
• Operating Temperature: 0 to 50° C
• Operating Humidity: < 95% non-condensing
• Pollution Degree 2
• Installation Category II
• Weight: 12 lbs
• Dimensions: 19” W x 19” D x 1.75” H (1U rack mount chassis)
Warning: Changes or modifications to this unit not expressly approved by SENCORE
could void the user’s authority to operate the equipment.
Note: This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions, may
cause harmful interference to radio communications. Operation of this equipment in
residential area is likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
Shielded cables must be used with this unit to ensure compliance with the Class A FCC
limits.
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ASM 988A – Manual
UNIT QUICK SETUP
Unpacking and Installation
Each ASM 988A is packed with a AC Power Cord and is ready to be mounted into a 19”
rack. The input data stream, IF output, and alarm output can be connected through the
back panel. The IF test output could be used to monitor a –20dB attenuated modulated
signal.
Connecting to the Unit
The tables located in Appendix A define the cable connections for the M2P, DVB-SPI
and Relay Alarm connectors.
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