1 / 9

FREQUENCY CONTROL MODES OF ET 9 2

FREQUENCY CONTROL MODES OF ET 9 2. Frequency Setting with Number Keys. Frequency Modification with Cursor Keys. Frequency Tracking with Sweep. Fr receiver = Carrier ± Tone. Fr receiver = Carrier ± Fr transmitter. END to END Loss Measurement. Group Delay Distortion Measurement.

lorenas
Download Presentation

FREQUENCY CONTROL MODES OF ET 9 2

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. FREQUENCY CONTROL MODES OFET 92 Frequency Setting with Number Keys Frequency Modificationwith Cursor Keys Frequency Tracking with Sweep Fr receiver = Carrier ± Tone Fr receiver = Carrier ± Fr transmitter END to END Loss Measurement Group Delay Distortion Measurement To learn more click on note! ELEKTR NIKA

  2. Frequency Setting with Number Keys Option Option Option To set a new frequency use the NUMBER keys as usual. E.g. 3825 Hz Notice: don’t touch the cursor keys ELEKTR NIKA

  3. Frequency Modification with Cursor Keys Option Option Option FREQU: 100.000 kHz FREQU: 100.000 kHz FREQU: 100.000 kHz FREQU: 100.000 kHz FREQU: 100.100 kHz FREQU: 100.200 kHz The frequency STEP can be modified with the HORIZONTAL cursor keys The FREQUENCY can be modified with the VERTICAL cursor keys Notice: don’t touch the number keys ELEKTR NIKA

  4. Frequency Tracking with Sweep Option Option Option For Options For Next/Loss Selectable ranges ELEKTR NIKA

  5. Receiver Frequency Setting in Carrier ± Tone Format Test instructions of FDM systems often specify the test frequency in format: Carrier ± Channel ( Tone) Frequency. ET 92 provides the separate setting of carrier and tone frequencies and so: No frequency calculation is required! Select mode Final display format Set carrier Set tone ELEKTR NIKA

  6. Special Transmitter Tracking Mode Often used test procedure of FDM equipment is: ■ feeding audio frequency test signal to the input of the tested channel ■ measuring the level of modulation product at a high frequency test point In that case: Receiver Frequency (Rx)= Carrier ± Transmitter Frequency (Tx) ET 92 provides a special transmitter tracking mode. In that special mode: ■ The frequency range of transmitter: 200Hz to 4 kHz ■The level meter is controlled by the generator according to the above mentioned rule. ADVANTAGES:No frequency calculation is required ! Only one frequency setting is required ! ELEKTR NIKA

  7. END to END Loss Measurements with MTTS 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 ELEKTR NIKA

  8. Group Delay Distortion Measurement with MTTS ET 92 applies the multi tone test method described in Recommendation ITU-T O.81 Appendix I MTTS METHOD: 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 ADVANTAGES: ■No synchronisation is necessary between the two instruments ■Group delay and signal level measurement at the same time ■The measuring time is shorter than that of other methods ELEKTR NIKA

  9. THANK YOU FOR YOUR ATTENTION!

More Related