Communication Markets Division

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965AMS Autotest Training

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Communication Markets Division

Basic Testing

Press Autotest Select No Fed. Press Setup

When changes are made press OK

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Communication Markets DivisionAutotest Without FED

The Autotest identifies copper problems.

Vdc – Test for CO battery.

Vac – Test for Induced AC.

Ohms – Test for insulation problems resulting in shorts and/or grounds.

Opens – Measures capacitive length.

%Cap – Displays the difference in T-R and T-G Opens as a percentage.

Load – Counts load coils and provides distance to first.

LBal – Measures longitudinal Balance to test the electrical similarity between T to G and R to G.

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Communication Markets DivisionVacant POTS With FED

Loss – Measures loss at 1004 Hz.

Noise – Measures audible noise that would be heard on active pair.

PI (Power Influence) – Measure induced noise from power lines.

Slope – Measures difference between 1004 Hz and 2804 Hz.

RBal – Measures resistive difference between T-G and R-G. Indicates high resistance opens.

VB Slope – Identifies loading problems.

The FED allows additional tests that will identify potential voice problems.

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Communication Markets Division

Faults

Faults: Fault Locate Method:Complete Open Open Meter or TDRPartial Open TDR or Opens by RatioSplit TDRGround RFLShort R<1K use TDR else use RFLCross RFLBattery Cross RFLDirty Open RFL or TDR

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Communication Markets Division

Capacitance Faults

Complete OPEN:A fault where a conductor is cut off completely.

Partial OPEN:A fault where a high resistance path developed on a conductor. ( Ex. Corroding splice)

2305 ft

3400 ft

1573 ft

38

3340 ft

3300 ft

3400 ft

48

%46 %3

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Communication Markets Division

Capacitance Faults Cont..SPLIT: A splicing error where one conductor of a pair (normally ‘Tip [A]’ because they the same color) is spliced to ‘Tip

[A]’ of another pair.

3350 ft

3400 ft

3300 ft

46

%3

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Communication Markets Division

Resistance FaultsGROUND : A fault between ‘Tip [A]’ and ‘Ground’, ‘Ring [B]’ and ‘Ground’ or both conductors and ‘Ground’.

4 dB

200 Ω>999 MΩ

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Communication Markets Division

Resistance Faults Cont..

SHORT : A fault between ‘Tip [A]’ and ‘Ring [B]’ conductors.

71 dB

>420 Ω >999 MΩ

>999 MΩ

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Communication Markets Division

Resistance Faults Cont..CROSS : A fault between a non-working (pair under test) and another or other non-working pairs .

4200 ft

3600 ft

3900 ft

30 dB

8.4 %

% Cap and LBal will be pass/fail results that will be affected.

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Communication Markets Division

Resistance Faults Cont..Battery CROSS : A fault between a working pair and a non-working pair (pair under test).

Pair # 1 - Working pair

Pair # 2 - Non-working(Pair under test)

-48 VDC

-46 VDC

Solid Cross Fault

Water

-48 VDC

-7 VDC

Resistive Cross fault

Pair # 1 - Working pair

0.0 V 0.0 V -46.0 V

30 dB

Ohms and LBal will be pass/fail results that will be affected.

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Communication Markets Division

Dirty Opens3. Dirty OPEN: Any combination of a ‘RESISTANCE’ and ‘CAPACITANCE’ faults

A: Complete OPEN and a SHORT B: Complete OPEN and a GROUND C: Complete OPEN and a CROSS

D: Partial OPEN and a SHORT E: Partial OPEN and a GROUND

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Communication Markets Division

Open Shields

For shields that are breaking down the 965AMS can be used to determine distance to the break.

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Communication Markets Division

Wideband Testing

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Connecting the FED II

Connect the FED to pair being tested. Go to other end of pair and connect the 965AMS.

TipCable

s

CableVault

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Communication Markets Division

Wideband Setup

1. Press the Autotest key

2. Scroll up/down to Wideband

3. Press Setup

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Communication Markets Division

Wideband Setup – Cont.

Set the Wideband parameters.

Aircore

Jelly-Filled

2 Pair Drop

5 Pair Drop

Calibrated

19

22

24

25

26

28

Custom 1

Custom 2

56 KB

64 KB

ISDN

HDSL

T1

E1

ADSL

ADSL2

HDSL2

HDSL4

H2/4ACC

H4RACC

H4NACC

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Communication Markets Division

Wideband Test

When the parameters have been set then press Test Pair 1.

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Wideband Results

Press F1 to Navigate between Values and Pass/Fail

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Communication Markets Division

Wideband Autotest

VDC: Voltage DC which can indicate working dial tone or a cross to worker in DC is present.

VAC: Voltage AC which indicates powerline induction when present

Ohms: Insulation test. A low number indicates poor insulation at the fault(s)

Opens: The length of the conductors.

%Cap: Percent of Capacitance is the difference between the T-G and R-G length.

Noise: The level of noise that is measured with some type of filter. ADSL2+ uses the G2 filter. VDSL2 uses an H (H1, H2, H3 or H4) filter.

Load: Amount of load coils measured in the circuit. Can be false if DSLAM or customer equipment is connected during test.

LBal: Longitudinal Balance of the circuit. Tests for circuit balance with respect to ground.

Loss: The measured loss of some frequency in the range of the tested circuit.

RBal: Resistive balance to compare Tip to ground and ring to ground resistance to loop.