Comtech EF Data SDM-9000 User manual

Part Number MN/SDM9000.IOM Revision 4
SDM-9000
Satellite Modem
Installation and O
p
eration Manual

Errata A
Comtech EFData Documentation Update
Subject: Added 8PSK and 16QAM information
Date: June 6, 2000
Document: SDM-9000 Satellite Modem Installation and Operation Manual
Part Number MN/SDM9000.IOM Rev. 4 dated May 5, 1997
Part Number: MN/SDM9000.EA4
Collating Instructions: Attach this page to page 1-16
Comments:
The following changes provide updated information for Section 1.4.3, Table 1-4, Figures
1-6 and 1-7. This information will be incorporated into the next revision.
Change Specifics:
1.4.3 8PSK and 16QAM (Viterbi Decoder and Reed-Solomon Codec)
The 8PSK and 16QAM specifications for the Eb/N0required to achieve 10-6 to
10-9 BER with the Viterbi decoder and Reed-Solomon Codec are shown in
Table 1-4. Refer to Figures 1-6 (8PSK) and 1-7 (16QAM) for the BER curves
with the Reed-Solomon option.
Table 1-4. 8PSK and 16QAM BER Data
Specification
Without IDR With IDR
8PSK 8PSK 16QAM 16QAM 8PSK 8PSK 16QAM 16QAM
BER 2/3 Rate 5/6 Rate 3/4 Rate 7/8 Rate 2/3 Rate 5/6 Rate ¾ Rate 7/8 Rate
10-6 6.1 dB 8.2 dB 8.3 dB 9.8 dB 6.5 dB 8.6 dB 8.7 dB 10.2 dB
10-7 6.4 dB 8.5 dB 8.5 dB 10.0 dB 6.9 dB 8.9 dB 8.9 dB 10.4 dB
10-8 6.6 dB 8.9 dB 8.7 dB 10.3 dB 7.1 dB 9.3 dB 9.1 dB 10.7 dB
10-9 6.9 dB 9.3 dB 8.9 dB 10.5 dB 7.4 dB 9.7 dB 9.4 dB 10.9 dB
Typical Typical
8PSK 8PSK 16QAM 16QAM 8PSK 8PSK 16QAM 16QAM
BER 2/3 Rate 5/6 Rate 3/4 Rate 7/8 Rate 2/3 Rate 5/6 Rate 3/4 Rate 7/8 Rate
10-6 5.6 dB 7.7 dB 7.8 dB 9.4 dB 5.9 dB 8.1 dB 8.2 dB 9.8 dB
10-7 5.8 dB 7.9 dB 8.1 dB 9.7 dB 6.2 dB 8.3 dB 8.5 dB 10.1 dB
10-8 6.1 dB 8.4 dB 8.3 dB 9.9 dB 6.5 dB 8.9 dB 8.7 dB 10.3 dB
10-9 6.3 dB 8.7 dB 8.6 dB 10.2 dB 6.7 dB 9.1 dB 9.0 dB 10.6 dB
Note: Reed-Solomon parameters differ from open network and closed network. Open network
meets IESS-308 QPSK operation, using a 4-deep interleaver. Closed networks run different
Reed-Solomon parameters. A longer code word and an 8-deep interleaver is used, resulting in
better performance.

10-4
10-3
10-5
10-6
BER
10-7
10-9
10-8
10-10
3.0 4.0 5.0 6.0
Eb/N0(dB)
7.0 8.0 9.0 10.0 11.0
10-2
2/3 RATE
SPECIFICATIONS
5/6 RATE
8 Mbit/s,
8PSK w/IDR
8 Mbit/s,
8PSK w/IDR
Figure 1-6. 8PSK BER Performance Curves (with Reed-Solomon)
Filename: T_ERRATA 2

8 Mbit/s,
w/ IDR
Figure 1-7. 16QAM BER Performance Curves (with Reed-Solomon)
Filename: T_ERRATA 3

Errata B
Comtech EFData Documentation Update
Subject: Changes to Note in Section 2.4.10, Alarms
Date: January 19, 2001
Document: SDM-9000 Satellite Data Modem Installation and Operation
Manual, Rev. 4, dated May 5, 1997
Part Number: MN/SDM9000.EB4
Collating Instructions: Attach this page to page 2-15
Comments:
The following changes provide updated information for page 2-15. This information will be
incorporated into the next revision.
Change Specifics:
2.4.10 Alarms (J10)
The alarms connector is used to provide three Form C contact closures for alarm
reporting, as follows:
• Alarm 1 = Not used
• Alarm 2 = TX
• Alarm 3 = RX
The two Form C summary fault contacts currently used are:
• Transmit alarm (Alarm 2)
• Receive alarm (Alarm 3)
Refer to Chapter 4 for a discussion of alarms monitored. To obtain a system summary
alarm, connect all the Form C contacts in parallel.
The alarms connection is a 9-pin female D connector located on the rear panel of the
modem. Screw locks are provided for mechanical security on the mating connector.
Pin # Signal Function Name
1 NO
2 Alarm 1 COM
3 NC
4 NO
5 Alarm 2 COM
6 NC
7 NO
8 Alarm 3 COM
9 NC
Note: A connection between the common (COM) and normally closed (NC) contacts
indicates no alarm.
Filename: T_ERRATA 1

Errata C
Comtech EFData Documentation Update
Subject: Changes to Table 3-2 (Modulator PCB Jumper Settings)
Date: January 23, 2002
Document: SDM-9000 Satellite Modem Installation and Operation Manual,
Rev. 4, dated May 5, 1997
Part Number: MN/SDM9000.EC4
Collating Instructions: Attach this page to page 3-3
Comments:
The following changes provide updated information for Table 3-2. This information will be
incorporated into the next revision.
Change Specifics:
3.2 Modulator
The modulator PCB (AS/3969) is located in the top slot of the modem chassis. The jumper settings are
listed in Table 3-2. Figure 3-2 shows the modulator card and the jumper locations.
Table 3-2. Modulator PCB Jumper Settings
Jumper Position Function
J7 1 to 2
2 to 3
Output forced ON, test mode
Normal, processor control
J9
(EEPROM size select)
1 to 2
2 to 3
27C512 (64K EEPROM)
27C256 (32K EEPROM)
Note: The modulator PCB jumpers in Table 3-2 are factory set.
Filename: T_ERRATA 1

Copyright © Comtech EFData, 2000. All rights reserved. Printed in the USA.
Comtech EFData, 2114 West 7th Street, Tempe, Arizona 85281 USA, [phone], FAX: [phone].
SDM-9000
Satellite Modem
Installation and Operation Manual
Part Number MN/SDM9000.IOM
Revision 4
May 5, 1997
Comtech EFData is an ISO 9001
Registered Company.

ii Rev. 4
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