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Technical specifications – EXFO VDSL2 User Manual

Page 266

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Technical Specifications

258

AXS-200/635i

POWER SPECTRAL DENSITY (PSD) NOISE MEASUREMENT

Test type

Continuous or peak-hold

Vertical scale

–10 dBm/Hz to –145 dBm/Hz or +20 dBm to –110 dBm

Horizontal scale

4.3125 kHz to 17 MHz, in 4.3125 kHz steps or 8.625 kHz to 30 MHz, in 8.625 kHz steps

Noise filters

None or E, F, G, VDSL2-8, VDSL2-12, VDSL2-17 and VDSL2-30

DSL IMPULSE NOISE MEASUREMENT

Threshold

–50 dBm (40 dBrn) to 0 dBm (90 dBrn) in 1 dB steps

Counter

Maximum 65 000

Test duration

1, 5, 10, 15 and 60 min, 24 h or continuous (up to 360 h)

Histogram plot interval

1, 5, 10, 15 or 60 min

Uncertainty (accuracy) (dB)

±2

SWEPT LONGITUDINAL BALANCE TEST

Frequency uncertainty (accuracy) (ppm)

±50

Level uncertainty (accuracy)(dB)

±2.0

Vertical scale (dB)

0 to 80.0 up to 2.2 MHz
0 to 60.0 up to 30 MHz

Horizontal scale

ADSL/2+: 26 kHz to 2.2 MHz
SHDSL: 26 kHz to 1 MHz
VDSL/VDSL2-12: 26 kHz to 12 MHz
VDSL2-17: 26 kHz to 17.66 MHz
VDSL2-30: 26 kHz to 30 MHz

DIGITAL MULTIMETER (DMM)

Measurement

Range

Resolution

Uncertainty (accuracy)

DC voltage

0 to 200 V

1 V

the better of ±2 % or ±1 V

AC voltage

0 to 140 Vrms

1 V

the better of ±2 % or ±1 V

Isolation resistance

0 to 999 M

Ÿ

3 digits

0 to 999

Ÿ

the better of ±2 % or ±5

Ÿ

1 k

Ÿ to 99 MŸ

±(2 % + 1 digit)

100 M

Ÿ to 999 MŸ

±(5 % + 1 digit)

Distance up to 30 000 m (100 000 ft)

Resistance

0 to 30 M

Ÿ

3 digits

0 to 999

Ÿ

the better of ±2 % or ±5

Ÿ

1 k

Ÿ to 30 MŸ

±(2 % + 1 digit)

Distance up to 30 000 m (100 000 ft)

Capacitance

1 nF to 10

—F

3 digits

±(2 % + 1 digit)

Distance up to 30 000 m (100 000 ft)

DC current

0 to 110 mA

1 mA

±(2 % + 1 digit)

AC current

0 to 77 mA

1 mA

±(2 % + 1 digit)

SPECTRAL DETECTIVE

Allows the AXS-200/635 to bridge (high-impedance) onto a live circuit to display a plot of transmitted levels and spectrum (PSD). The Spectral Detective test can be
referenced to any user-selected impedance. The impedance reference setting is required to display proper readings in dBm/Hz or dBm.
Test type

Continuous or peak-hold

Bridging impedance

15 k

Ÿ

Vertical scale

–10 to –145 dBm/Hz or +20 to –110 dBm

Horizontal scale

4.3125 kHz to 17 MHz, in 4.3125 kHz steps or 8.625 kHz to 30 MHz, in 8.625 kHz steps

Noise filters

None or E, F, G, VDSL2-8, VDSL2-12, VDSL2-17 and VDSL2-30

STRESS/LEAKAGE (ISOLATION RESISTANCE)

Source

100 VDC, current safely limited to <1.0 mA

Range (M

Ÿ)

0 to 999 auto-ranging

Resolution

3 significant digits

Uncertainty (accuracy)

0 to 999

Ÿ, the better of ±2 % or ±5 Ÿ

1 k

Ÿ to 99 MŸ, ±(2 % + 1 digit)

100 M

Ÿ to 999 MŸ, ±(5 % + 1 digit)

Soak timer (s)

1 to 99

RESISTIVE FAULT LOCATION (RFL)

Test type

Single pair and separate good pair

Fault detection (M

Ÿ)

0 to 20

Resolution

3 digits

Loop resistance (k

Ÿ

7 maximum

Multiple cable sections

Five (includes gauge and temperature setting)

Fault location

*Total resistance, near-end to fault resistance, fault to strap resistance (four significant digits)
*Total length, distance to fault, distance from fault to strap (3 ft/1 m resolution)

Uncertainty (accuracy)

The better of 0.2

Ÿor ±2 %

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