Measurement Functions | 3M™ Dynatel™ Advanced Modular System 965AMS |
DSL>DSL Spectrum Analyzer>Application Notes
Spectrum analysis allows you to visually see a disturbing signal’s shape by reading and displaying the level of noise in a frequency range.
The shape can be caused by ADSL, ISDN, HDSL, T1 or VDSL.
This chart shows the ADSL2+ spectrum with common disturbers and chart 2 shows the VDSL spectrum with potential disturbers.
Center Frequencies
DDS |
| ISDN | HDSL | T1 | AM Radio 680 kHz+ |
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| 40 | 196 | 772 |
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20 |
| ADSL | 138 140 | ADSL |
| 1100 | ADSL | 2200 | |
kHz | Upstream | kHz kHz | Downstream | kHz | Downstream | kHz | |||
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| Nyquist |
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| Frequency |
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VDSL Spectrum
US 0
DS 1
US 1
DS 2
US 2
US 2
1.1 | 3.75 | 5.2 | 8.5 | 12 | 30 |
MHz | MHz | MHz | MHz | MHz | MHz |
110
