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Chapter 9 Technical specifications
Characteristics of the OTDR
106 User Manual 7SMART102 Rev002
Characteristics
of reflectometry
measurements
Distance measurement
– Automatic or Dual cursor
– Distance displayed takes into account the calibration of the refrac-
tive index of the fiber.
– Index adjustable from 1,30000 to 1,70000 in steps of 0,00001
– Resolution of display: 1 cm max.
– Resolution of cursor: 1 cm max.
– Spacing of measurement points: from 4 cm, with up to 256 000
acquisition points.
– Accuracy: ± 1m± sampling resolution ±1.10
-5
x distance
(excluding errors of calibration of refractive index of the fiber).
– Display span: 0.1 km m to 260 km for single mode
Attenuation measurement
– Automatic, manual, 2-point, 5-point, and LSA
– Resolution of display: 0,001 dB
– Resolution of cursor: 0,001 dB
– Linearity: ± 0.04 dB/dB for single mode
– Display span: 1.25 dB to 55 dB
Reflectance / ORL Measurement
– Resolution of display: 0,01 dB
– Accuracy: ± 2 dB
Automatic measurement
– Automatic measurement of all the elements of the signal. Slope
measurement by least squares or 2 points of measurement.
– Display threshold of faults:
Distance measurement Automatic or dual cursor
Display range 0.1 km to 260 km for single-mode
Cursor resolution 1 cm
Sampling resolution 4 cm for single-mode
Accuracy
±1 m ±sampling resolution ±1.10–5 * x dis-
tance (Excluding group index uncertainties)