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Application Notes for Frequency Division Multiplex System Testing with ET 9 2

Application Notes for Frequency Division Multiplex System Testing with ET 9 2. Level Measurement in Tracking Mode. Noise Level Measurement. Pilot Level Measurement. Psophometric Noise Measurement. Impulsive Noise Measurement. Frequency Response Test with MTTS. Micro Interruption Analysis.

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Application Notes for Frequency Division Multiplex System Testing with ET 9 2

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  1. Application Notes for Frequency Division Multiplex System Testing withET 92 Level Measurement in Tracking Mode Noise Level Measurement Pilot Level Measurement Psophometric Noise Measurement Impulsive Noise Measurement Frequency Response Test with MTTS Micro Interruption Analysis Group Delay Distortion Jitter and Frequency Difference To learn more click on note! ELEKTR NIKA

  2. Signal Level Measurement in Transmitter Tracking Mode ofET 92 Changing the transmitter frequency (Tx) the receiver automatically follows the change according to the selected rule: Rx=CARRIER+Tx or CARRIER-Tx ELEKTR NIKA

  3. Noise Level Measurement at Master Group withET 92 ELEKTR NIKA

  4. Pilot Level Measurement at Super Group withET 92 ELEKTR NIKA

  5. Pilot FrequencyAllocationSchematics ELEKTR NIKA

  6. Psophometric Noise Level Measurement withET 92 Display format up to 1 min Display format over 1 min ELEKTR NIKA

  7. Impulsive NoiseMeasurement with ET 92 Display format up to 30 sec Display format over 30 sec An impulse is counted when the received noise signal exceeds a preset threshold for more than 500 ns ELEKTR NIKA

  8. Frequency Response Test ofET 92with MTTSMethod MTTS METHOD: The transmitter generates 36 test tones ■Frequencyrange: 100 to 3600 Hz ■Frequency step: 100 Hz ■Level: -20 dBm/frequency The receiver measures the 36 test tones simultaneously ADVANTAGES: ■No synchronisation is necessary between the two instruments ■The measuring time is shorter than that of other methods ELEKTR NIKA

  9. Micro Interruption Analysis withET 92 An interruption is detected when the level of test tone drops below a designated threshold formore than 0,6 ms. The detected interruptions are included into five categories by duration ▼ Click here to see the test results In graphic and numeric forms ELEKTR NIKA

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

  11. Group Delay Distortion Measurement withET 92 ET 92 applies the multi tone test method described in Recommendation ITU-T O.81 Appendix I The transmitter generates 36 test tones ■ Frequency range: 100 to 3600 Hz ■Frequency step: 100 Hz ■Level: -20 dBm / frequency The receiver measures the 36 test tones simultaneously ELEKTR NIKA

  12. Phase Jitter and Frequency Difference Measurement ET 92 performs jitter and frequency error measurements simultaneously according to Recommendation ITU-T O.91 That measurement needs two instruments connected to the ends of the tested line. ■ One of them transmits jitter free quartz accurate 1020 Hz test tone ■ The other one receives and evaluates it ELEKTR NIKA

  13. THANK YOU FOR YOUR ATTENTION!

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