Comtech EF Data SDM-9000 Manuale utente

Part Number MN/SDM9000.IOM Revision 4

SDM-9000

Satellite Modem

Installation and O

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

(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

Comtech EFData, 2114 West 7th Street, Tempe, Arizona 85281 USA, (480) 333-2200, FAX: (480) 333-2161.

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

Customer Support

Contact the Comtech EFData Customer Support Department for:

•Product support or training

•Information on upgrading or returning a product

•Reporting comments or suggestions concerning manuals

A Customer Support representative may be reached at:

Comtech EFData

Attention: Customer Support Department

2114 West 7th Street

Tempe, Arizona 85281 USA

(480) 333-2200 (Main Comtech EFData Number)

(480) 333-4357 (Customer Support Desk)

(480) 333-2161 FAX

or, E-Mail can be sent to the Customer Support Department at:

service@comtechefdata.com

1. To return a Comtech EFData product (in-warranty and out-of-warranty) for

repair or replacement:

2. Request a Return Material Authorization (RMA) number from the Comtech

EFData Customer Support Department.

3. Be prepared to supply the Customer Support representative with the model

number, serial number, and a description of the problem.

4. To ensure that the product is not damaged during shipping, pack the product in

its original shipping carton/packaging.

5. Ship the product back to Comtech EFData. (Shipping charges should be prepaid.)

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

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