1 / 20

HIFI consortium meeting Utrecht 19 April 2004 High Resolution Spectrometer AIV / QM test results

HIFI consortium meeting Utrecht 19 April 2004 High Resolution Spectrometer AIV / QM test results. Performance test results (1/6) - Summary. Performance test results (2/6) - Spurious / aliasing. USB 2. Aliasing. spurious. Performance test results (2/6) - Spurious / aliasing.

solana
Download Presentation

HIFI consortium meeting Utrecht 19 April 2004 High Resolution Spectrometer AIV / QM test results

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. HIFI consortium meetingUtrecht19 April 2004High Resolution SpectrometerAIV / QM test results

  2. Performance test results (1/6) - Summary HIFI consortium meeting, Utrecht

  3. Performance test results (2/6) - Spurious / aliasing USB 2 Aliasing spurious HIFI consortium meeting, Utrecht

  4. Performance test results (2/6) - Spurious / aliasing HIFI consortium meeting, Utrecht

  5. Performance test results (3/6) - Linearity measurements Input power / optimal input power (dB) -4 -2 0 2 4 Gain variations (%) non linearity : 1.1% in a 3dB range HIFI consortium meeting, Utrecht

  6. Performance test results (4/6) - Linearity measurements Linearity “wide range” USB 4 Output power / optimal output power (dB) Step number HIFI consortium meeting, Utrecht

  7. Performance test results (5/6) - Spectral resolution HIFI consortium meeting, Utrecht

  8. Performance test results (6/6) - Stability HIFI consortium meeting, Utrecht

  9. Vibration & shock test results The HRS has successfully passed the vibration and shock tests HIFI consortium meeting, Utrecht

  10. Thermal vacuum test results (1/2) • The maximum temperature in the HRS is less than 35°C above the temperature of the plate (the hot spots are the correlator ASICs and the DC/DC). • The following performances does not change all along the test: • efficiency = 79%  1% • linearity = 1%  0.2% • stability (total power): > 10s with an excess noise < 20% • stability (spectroscopic): > 100s with an excess noise < 20% • IRM Rejection > 25 dB (measured at some frequencies only) • spectral resolution • One of the four tuneable LOs failed during the cycling. • The frequency of the GaAs ASICs has to be reduced at lowest temperatures. HIFI consortium meeting, Utrecht

  11. Thermal vacuum test results (2/2) The GaAs correlator ASICs are used with thermal straps. These thermal straps can be reduced or removed to increase the ASIC’s performances. (extra characterisation to be done) The temperature of the base plate under the HRS should be greater than 36°C. Is this confirmed ? HIFI consortium meeting, Utrecht

  12. EMC test results (1/3) The problems of radiated emission and susceptibility are due to the bad shielding of SMA connectors. The problem has been characterised and some solutions have been identified (add EMI shields or conductive glue). HIFI consortium meeting, Utrecht

  13. EMC test results (2/3) A susceptibility test is considered to be successful when no perturbation is detected at a power level greater than -128 dBm  We need ON / OFF integrations over 60 seconds to detect such a power level HIFI consortium meeting, Utrecht

  14. EMC test results (3/3) The test method is a “very worst case” as the perturbation is at its maximum level in the ON spectrum and is switched off in the OFF spectrum. Is the injection level of 2 V/m appropriated ? Radiated susceptibility, 1.4 GHz, 2V/m HIFI consortium meeting, Utrecht

  15. ICC (1/3) - User applications available for HRS QLA QLA applications launched during the run of a test (Near Real Time) • Check of HRS health • Quick analysis and display of HRS data during a test • Relative Total Power • Analog and digital offsets • Raw correlation function • Normalized correlation function • QLA spectrum (with basic correction) HIFI consortium meeting, Utrecht

  16. ICC (2/3) - User applications available for HRS IA • Check, analysis and display for HRS functional & performance tests • Relative Total Power • Raw correlation function • Normalized correlation function • Spectrum (with full correction) • Normalized spectrum • Calibrated spectrum • Check FT-01 : HRS Switch-on • Check FT-02 : ACS internal BIT • Check FT-03 : IF functional test • Check FT-04 : IF/IRM attenuators • Check PRFT-01 : Efficiency • Check PRFT-02 : Spectral Resolution • Check PRFT-03a : Linearity (Line) • Check PRFT-03b : Linearity (Noise) • Check PRFT-03c : Linearity (Wide) • Check PRFT-04 : Stability • Check PRFT-05 : Band/Band Rejection • Check PRFT-06 : Spurious • Check PRFT-07 : Ripple HIFI consortium meeting, Utrecht

  17. HRS QM Planning We will deliver the HRS-QM mid of June to repair and to perform the necessary extra characterisations (to be discussed with HIFI project) Is the DRB maintained the 27 of April ? HIFI consortium meeting, Utrecht

  18. HRS FM Planning (1/3) - IF HIFI consortium meeting, Utrecht

  19. HRS FM Planning (2/3) - ACS HIFI consortium meeting, Utrecht

  20. HRS FM Planning (3/3) - AIV HIFI consortium meeting, Utrecht

More Related