DLS 400 Operating Manual
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4.8 Operating Two or More Units from the 400 Series Concurrently .......................24
5. SYSTEM DESCRIPTION ...............................................................................25
5.1 DLS 400 Description ...........................................................................................25
5.2 DLS 400 Unit Loopset Configurations ...............................................................26
5.3 Loop Descriptions ...............................................................................................28
5.3.1 CSA Loops ....................................................................................................28
5.3.2 ANSI Loops ...................................................................................................31
5.3.3 EIA Loops .....................................................................................................34
5.3.4 Variable Loops ..............................................................................................35
5.3.5 Reversing Loops ............................................................................................36
6. ADSL NOISE GENERATOR DESCRIPTION ......................................38
6.1 General ................................................................................................................38
6.2 Grouped Impairments ..........................................................................................38
6.2.1 Basic Rate Testing, ANSI T1.E1 T1.601 standard ........................................39
6.2.2 HDSL Rate Testing, ANSI Technical Report on HDSL ................................39
6.2.3 HDSL2 Rate Testing, ANSI Proposed Working Draft for
HDSL2 Standard (T1E1.4/98–268) ..............................................................39
6.2.4 ADSL Rate Testing, ANSI T1.413, Issue I and II ..........................................40
6.2.5 ADSL Rate Testing, ITU Standard for G.lite ................................................40
6.2.6 Basic Rate Testing, ETSI TS 102 080 ISDN Standard ..................................40
6.2.7 HDSL Rate Testing, ETSI TS 101 135 HDSL Standard ...............................41
6.2.8 European ADSL rate testing, ETSI ETR 328 ADSL Standard ......................41
6.3 Individual Impairments .......................................................................................41
6.4 Impairment Card Organization ............................................................................46
6.5 Output Stage ........................................................................................................47
6.6 Crosstalk Generators A and B .............................................................................48
6.7 Crosstalk Generator C .........................................................................................49
6.8 Shaped Noise Generator ......................................................................................50
6.9 Flat White Noise Generator .................................................................................50
6.10 Impulse Generator .............................................................................................50
6.11 External Noise ...................................................................................................52
6.12 Powerline Related Impairments ........................................................................52
6.12.1 Metallic Noise .............................................................................................53
6.12.2 Longitudinal Noise ......................................................................................53
6.12.3 DLS 200 Mode Crosstalk and White Noise ................................................55
