Application Notes for Line Testing with ET 91

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Single Sided Measurements

END to END Measurements

LCL Balance

Impedance

Return Loss

Near End Crosstalk

Spectrum Analyser

Frequency Response with MTTS

Automatic Master Slave Test

Micro Interruption Analysis

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LCL Balance Measurement with ET 91Two balance measuring modes are provided:Two balance measuring modes are provided: ■ ■ Measurement with one single frequencyMeasurement with one single frequency ■ ■ Measurement in sweep modeMeasurement in sweep mode

ET 91 performs LCL measurement using the test circuit described in ITU-T Rec. 0.9ET 91 performs LCL measurement using the test circuit described in ITU-T Rec. 0.9

Test results are available in Test results are available in graphicgraphic or or numericnumeric formats. formats.

Selectable ranges

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Impedance Measurement with ET 91

ET 91 provides impedance measurement for balanced and coaxial test ET 91 provides impedance measurement for balanced and coaxial test objects in objects in fix frequencyfix frequency or or sweepsweep modes modes withoutwithout any any external adapterexternal adapter. .

Test results are available in Test results are available in graphicgraphic or or numericnumeric formats. formats.

Selectable ranges

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Return Loss Measurement with ET 91

ET 91 provides return loss measurement for balanced and coaxial test ET 91 provides return loss measurement for balanced and coaxial test objects in objects in fix frequencyfix frequency or or sweepsweep modes modes withoutwithout any any external adapterexternal adapter. .

Test results are available in Test results are available in graphicgraphic or or numericnumeric formats. formats.

Selectable ranges

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Near End Crosstalk measurement with ET 91

ET 91 provides Near EET 91 provides Near Ennd Crosstalk measurement for balanced and d Crosstalk measurement for balanced and coaxial test objects by transmitting on socket L2 and receiving on L1.coaxial test objects by transmitting on socket L2 and receiving on L1.

Fix frequencyFix frequency or or sweepsweep modes are available modes are available

Test results are available in Test results are available in graphicgraphic or or numericnumeric formats. formats.

Selectable ranges

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Spectrum Analyzer Measurement with ET 91

Noise Level MeasurementPower Spectral Density (PSD) Measurement

ET 91 provides sophisticated spectrum analyser measurements with extremely large dynamic range and high resolution.

Display range: down to -140 dBm/HzEvaluation: NORM, PEAK, AVG, SAWG

Test results are available in Test results are available in graphicgraphic or or numericnumeric formats. formats.

Selectable ranges

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Quick Frequency Response Test of ET 91 with Multi Tone Test Signal

MTTS METHOD: ■ The transmitter generates 35 test tones ■ The receiver measures the 35 test tones simultaneously

ADVANTAGES: ■ No synchronisation is necessary between the two instruments ■ The measuring time is shorter than that of other methods

Selectable ranges

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Automatic Line Test in Master Slave Mode of ET 91

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Detailed Test Results of Automatic Master Slave Line Measurement

All the test results are available also in numeric form and they can be transferred to PC via USB interface. ELEKTR NIKA

Micro Interruption Measurement withMicro Interruption Measurement with ET 91ET 91

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An interruption is detected when the level of test tone drops below a designated threshold for more than 0,6 ms. The detected interruptions are included into five categories by duration

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Detailed Results of Micro Interruption Measurement

All the test results are available also in numeric form and they can be transferred to PC via USB interface.

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