Comtech EF Data SLM-7650 Installation And Operation Manual page 8

Comtech ef data satellite modem installation and operation manual

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SLM-7650 Satellite Modem

Preface

5.3

Modem Performance Verification Tests.................................................................................................5-14

5.3.1

Modulator Tests .....................................................................................................................................5-15

5.3.1.1 Spectral Shape of the IF Output ....................................................................................................... 5-15

5.3.1.2 Carrier Null ...................................................................................................................................... 5-15

5.3.1.3 Spurious using a Spectrum Analyzer ............................................................................................... 5-16

5.3.1.4 Output Frequency............................................................................................................................. 5-16

5.3.1.5 Power Level ..................................................................................................................................... 5-16

5.3.2

Demodulator Tests .................................................................................................................................5-18

5.3.2.1 Dynamic Range................................................................................................................................ 5-18

5.3.2.2 Acquisition Range............................................................................................................................ 5-18

5.3.3

System BER Test ...................................................................................................................................5-18

5.3.4

Modem Test Modes................................................................................................................................5-19

5.3.4.1 IF Loopback ..................................................................................................................................... 5-19

5.3.4.2 Base Band Loopback ....................................................................................................................... 5-20

5.3.4.3 Carrier Modes .................................................................................................................................. 5-21

5.3.4.4 Reed-Solomon Correction OFF ....................................................................................................... 5-22

5.3.4.5 2047 and MIL-188 Test Patterns...................................................................................................... 5-22

APPENDIX A. REMOTE CONTROL OPERATION..................................................B-1

GLOSSARY .................................................................................................................g-1

Revision 4

MN/SLM7650.IOM

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