Exfo VDSL2 Bedienungsanleitung PDF herunterladen (Seite 266)

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 3 digits

0 to 999  the better of ±2 % or ±5 

1 k to 99 M ±(2 % + 1 digit)

100 M to 999 M ±(5 % + 1 digit)

Distance up to 30 000 m (100 000 ft)

Resistance 0 to 30 M 3 digits

0 to 999  the better of ±2 % or ±5 

1 k to 30 M ±(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

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) 0 to 999 auto-ranging

Resolution 3 signiﬁcant digits

Uncertainty (accuracy) 0 to 999 , the better of ±2 % or ±5 

1 k to 99 M, ±(2 % + 1 digit)

100 M to 999 M, ±(5 % + 1 digit)

Soak timer (s) 1 to 99

RESISTIVE FAULT LOCATION (RFL)

Test type Single pair and separate good pair

Fault detection (M) 0 to 20

Resolution 3 digits

Loop resistance (k 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 or ±2 %

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