3M Dynatel 965AMS Скачать руководство пользователя страница 18 | Manualshive

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3M

™

Dynatel

™

Advanced Modular System 965AMS 30-MHz Spectrum Analyzer

DSL>Resistance Balance>

Operation

3. Press

Test

to start the

test.

DSL>Resistance Balance>

Normal Values

Service

% Ohms Difference

POTS

3%

Wideband

1%

DSL>Resistance Balance>

Application Notes

The resistance balance test is used to identify a high resistance
open or a bad splice.

The test will also identify a loop that is resistively too long for
the selected autotest.

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Содержание Dynatel 965AMS

Страница 1: ...February 2009 78 8140 2658 5 A Future Proof Testing Platform 3 Dynatel Advanced Modular System 965AMS 30 Megahertz Spectrum Analyzer DSL User s Guide...

Страница 2: ...2 3M Dynatel Advanced Modular System 965AMS 30 MHz Spectrum Analyzer...

Страница 3: ...3 3M Dynatel Advanced Modular System 965AMS 30 MHz Spectrum Analyzer Contents DSL Digital Subscriber Line 5 DSL Loss 5 DSL Noise 9 DSL Spectrum Analyzer 13 Resistance Balance 17 DSL Impulse Noise 19...

Страница 4: ...4 3M Dynatel Advanced Modular System 965AMS 30 MHz Spectrum Analyzer...

Страница 5: ...Resistive Balance and DSL Impulse Noise DSL DSL Loss Use DSL Loss function to measure the amount of loss in a circuit at a specific frequency This is typically accomplished by sending tone with anoth...

Страница 6: ...and down arrow keys to select DSL Loss Use a tone source at the far end that is capable of sending a known output level such as a 965AMS Use 0dBm as the output level or follow your method of test 2 Pr...

Страница 7: ...ignal lost from a tone transmitter 965AMS 3M Dynatel Far End Device FED or other capable device to the measuring 965AMS High loss is an indication of 1 A loop that is too long for the potential servic...

Страница 8: ...that was performed with a 965AMS a 3M Dynatel Far End Device FED II and the selected service was ADSL2 Look at the before and after for these two readings When the bridge tap is removed then the slope...

Страница 9: ...unction to measure the Longitudinal or Metallic Noise on a DSL line DSL DSL Noise Hook Up 2 2 2ING 2ING ROUND ROUND 4IP 4IP DSL DSL Noise Operation 1 Press the blue DSL key to enter the DSL function U...

Страница 10: ...trum Analyzer DSL DSL Noise Operation 3 Use the up and down arrow keys to select the type of service that you are measuring 4 Press OK when finished 5 Press OK to start the measurement for DSL noise 6...

Страница 11: ...ss of connection The 965AMS measures longitudinal as well as metallic noise Having high noise in either of these tests will prompt you to look at the circuit with a Spectrum Analyzer to identify the s...

Страница 12: ...AMS 30 MHz Spectrum Analyzer Metallic Noise is a measured between Tip A and Ring B Metallic Noise measures the active noise on a pair 2 2ING 2ING 4IP 4IP Both tests are performed through filters based...

Страница 13: ...lyzer SA to display a graph of useful signals and interference noise at specific frequencies up to 30 MHz DSL DSL Spectrum Analyzer Hook Up 2 2ING 2ING 4IP 4IP DSL DSL Spectrum Analyzer Operation 1 Pr...

Страница 14: ...nge the frequency range 4 Use the left and right arrow keys to move the cursor The cursor position will display the frequency and the signal level 5 Once you have selected a span of 1M or 2M you may a...

Страница 15: ...15 3M Dynatel Advanced Modular System 965AMS 30 MHz Spectrum Analyzer DSL DSL Spectrum Analyzer Operation ADSL Upstream T1 HDSL ISDN...

Страница 16: ...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 28 kHz...

Страница 17: ...the Red and Green test leads Resistance difference between the two conductors DSL Resistance Balance Hook Up 2 2 2ING 2ING 2EFERENCE 2EFERENCE 4IP 4IP DSL Resistance Balance Operation 1 Press the blue...

Страница 18: ...to start the test DSL Resistance Balance Normal Values Service Ohms Difference POTS 3 Wideband 1 DSL Resistance Balance Application Notes The resistance balance test is used to identify a high resist...

Страница 19: ...damage data transmission if the amplitude and frequency are spiking into used transmission paths The 965AMS measures spikes eight times per second DSL DSL Impulse Noise Hook Up 2 2 2ING 2ING ROUND RO...

Страница 20: ...mpulse Noise Operation 3 Use the up and down arrow keys to select the type of service that you are measuring 4 Press OK when finished 5 Press OK to start the Impulse Noise test 6 Press Setup to select...

Страница 21: ...21 3M Dynatel Advanced Modular System 965AMS 30 MHz Spectrum Analyzer DSL DSL Impulse Noise Operation 8 Press Restart to begin a new test 9 Press Setup to return to the setup screen...

Страница 22: ...a spread of 2 dB then you will be able to see any hits that exceed 32 36 or 40 Although this circuit will pass at 40 you will be able to see if there is noise just under the threshold that can appear...

Страница 23: ...23 3M Dynatel Advanced Modular System 965AMS 30 MHz Spectrum Analyzer...

Страница 24: ...ary statements contained on your purchase order shall have no force or effect unless expressly agreed upon in writing by an authorized officer of 3M Warranty Limited Remedy Limited Liability This prod...

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