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Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 1 IF Downconverter Travis Newton LO/IF Engineer.

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Presentation on theme: "Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 1 IF Downconverter Travis Newton LO/IF Engineer."— Presentation transcript:

1 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 1 IF Downconverter Travis Newton LO/IF Engineer

2 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 2 IF Downconverter -Converts 8-12 GHz IF to two 2-4 GHz baseband IF’s for 3-bit, 4GHz sampling -Converts 8-12 GHz IF to one 1-2 GHz baseband IF’s for 8-bit, 2GHz sampling

3 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 3 IF Downconverter Specifications ITEMSPECIFICATIONNOTES Number of modules 1244 per antenna plus 12 spares Number of IF inputs per module 1 Input frequency range 7.5 – 12.5 GHz

4 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 4 IF Downconverter Specifications ITEMSPECIFICATIONNOTES Input power level -45 dBm/GHz Variation of power spectral density +/- 1.5 dB Headroom> 20 dB

5 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 5 IF Downconverter Specifications ITEMSPECIFICATIONNOTES Number of LO per module 32 independently tunable, 1 fixed Frequency range of LO 2 @ 10.8 – 14.8 GHz, 1 @ 4.096 GHz fixed Power level LO +10 dBm

6 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 6 IF Downconverter Specifications ITEMSPECIFICATIONNOTES Spurious levels of LO <-70 dBc for spurious, < -80 dBc for harmonics related to any reference frequency, <-40 dBc for harmonics

7 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 7 IF Downconverter Specifications ITEMSPECIFICATIONNOTES Number of IF outputs per module 3 Frequency range of output 2 bands 2-4 GHz 1 band 1-2 GHz Power level of output TBD

8 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 8 IF Downconverter Specifications ITEMSPECIFICATIONNOTES IF headroom>20 dB LO 2 nd harmonic spur and leakage < -40 dBc IF input VSWR < 1.5:1.0

9 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 9 IF Downconverter Specifications ITEMSPECIFICATIONNOTES IF input noise figure < 12 dB Image rejection < -25 dBc Overall amplitude flatness 2 dB / 200 MHz avg. slope Smooth variations, no large jumps

10 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 10 IF Downconverter Specifications ITEMSPECIFICATIONNOTES Phase/delay stability TBD Isolation between channels > 70 dB

11 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 11 IF Downconverter Specifications ITEMSPECIFICATIONNOTES Total power detector response time TBD Phase linearity 2.8 nsec / any 2 MHz InterfaceTBD M&CTBD

12 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 12 IF Downconverter Filters: Phase Linearity: < +/- 25  across any 2 GHz Amplitude: 0.5 dB pp Delay matched: < 15  across 80% centered BW Phase  w/ Temp: <20  across BW

13 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 13 IF Downconverter Variable Attenuators: 0.125 dB LSB, 32.875 dB max Phase shift with Attenuation change: +/- 5  to 20 dB +/- 10  to 32 dB, TBD

14 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 14 IF Downconverter Isolation/Isolators: 4096 MHz LO – 2-4 GHz path: 133 dB in Switch, Isolator, Mixer 2-4 GHz paths: 40 dB in Isolator, Power Divider 2 nd LO #1 – 2 nd LO #2: 100 dB in Isolators, Mixer, Power Divider Output: TBD

15 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 15 IF Downconverter Total Power Detectors Similar to or same as ALMA 2 ms sampled Servo Attenuators locally (closed loop) or attenuators servoed from MCC TPD and Variable Attenuators possibly served by separate MIB

16 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 16 IF Downconverter Path 1 Converts 8-12 GHz to 2-4 GHz

17 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 17 IF Downconverter 8-12 GHz Device 8-12 GHz GainSignal dBm/GHz Noise dBm/GHz Spectral SNR Headroom Input-34-6430 Coax-3-37-6730 Isolator-0.6-37.6-67.529.9 Attenuator-5-42.6-72.329.7 Amplifier20-22.6-51.729.126.6

18 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 18 IF Downconverter 8-12 GHz Device 8-12 GHz GainSignal dBm/GHz Noise dBm/GHz Spectral SNR Headroom Attenuator-3-25.6-54.729.1 BP Filter-26.6-55.729.1 Attenuator-6-32.6-61.729.1 Dig. Attn.-5-37.6-66.729.1 Amplifier12-25.6-54.528.921.6

19 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 19 IF Downconverter 8-12 GHz Device 8-12 GHz GainSignal dBm/GHz Noise dBm/GHz Spectral SNR Headroom Gain Eq.-26.6-55.528.9 Power Div.-3.5-30.1-5928.9 TPD-10-40.1-68.928.819.1 Power Div.-3.5-33.6-62.428.8 Isolator-2-35.6-64.428.8

20 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 20 IF Downconverter 2-4 GHz Device 2-4 GHz GainSignal dBm/GHz Noise dBm/GHz Spectral SNR Headroom Mixer 2-4-5.5-41.1-69.828.724.1 Isolator-0.4-41.5-70.228.7 Attenuator-3-44.5-7328.5 BP Filter-45.5-73.928.4 Attenuator-3-48.5-76.528

21 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 21 IF Downconverter 2-4 GHz Device 2-4 GHz GainSignal dBm/GHz Noise dBm/GHz Spectral SNR Headroom Amplifier16.5-32-58.626.635 RF Switch-1.8-33.8-60.426.6

22 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 22 IF Downconverter 2-4 GHz Device 2-4 GHz GainSignal dBm/GHz Noise dBm/GHz Spectral SNR Headroom Attenuator-3-36.8-63.426.6 Amplifier13-23.8-50.326.520.8

23 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 23 IF Downconverter 2-4 GHz Device 1-4 GHz GainSignal dBm/GHz Noise dBm/GHz Spectral SNR Headroom RF Switch-1.8-25.6-52.126.5 Attenuator-3-28.6-55.126.5 LP Filter-29.6-56.126.5 Attenuator-3-32.6-59.126.5 Amplifier13-19.6-46.126.5 16.6

24 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 24 IF Downconverter 2-4 GHz Device 1-4 GHz GainSignal dBm/GHz Noise dBm/GHz Spectral SNR Headroom Attenuator-3-22.6-49.126.5 BP Filter-23.6-50.126.5 Attenuator-3-26.6-53.126.5 Dig. Attn.-8-34.6-6126.4 Amplifier13-21.6-4826.418.5

25 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 25 IF Downconverter 2-4 GHz Device 1-4 GHz Gain dB Signal dBm/GHz Noise dBm/GHz Spectral SNR Headroom dB Power Div.-3.5-25.1-51.526.4 TPD-10-35.1-61.526.418 Amplifier0-25.1-51.526.422 Out to Sampler -.1-25.2-51.626.4

26 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 26 IF Downconverter Path 2 Converts 8-12 GHz to 1-2 GHz

27 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 27 IF Downconverter 8-12 GHz Device 8-12 GHz GainSignal dBm/GHz Noise dBm/GHz Spectral SNR Headroom Input-34-6430 Coax-3-37-6730 Isolator-0.6-37.6-67.529.9 Attenuator-5-42.6-72.329.7 Amplifier20-22.6-51.729.126.6

28 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 28 IF Downconverter 8-12 GHz Device 8-12 GHz GainSignal dBm/GHz Noise dBm/GHz Spectral SNR Headroom Attenuator-3-25.6-54.729.1 BP Filter-26.6-55.729.1 Attenuator-6-32.6-61.729.1 Dig. Attn.-5-37.6-66.729.1 Amplifier12-25.6-54.528.921.6

29 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 29 IF Downconverter 8-12 GHz Device 8-12 GHz GainSignal dBm/GHz Noise dBm/GHz Spectral SNR Headroom Gain Eq.-26.6-55.528.9 Power Div.-3.5-30.1-5928.9 TPD-10-40.1-68.928.819.1 Power Div.-3.5-33.6-62.428.8 Isolator-2-35.6-64.428.8

30 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 30 IF Downconverter 2-4 GHz Device 2-4 GHz GainSignal dBm/GHz Noise dBm/GHz Spectral SNR Headroom Mixer 2-4-5.5-41.1-69.828.724.1 Isolator-0.4-41.5-70.228.7 Attenuator-3-44.5-7328.5 BP Filter-45.5-73.928.4 Attenuator-3-48.5-76.528

31 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 31 IF Downconverter 2-4 GHz Device 2-4 GHz GainSignal dBm/GHz Noise dBm/GHz Spectral SNR Headroom Amplifier16.5-32-58.626.635 RF Switch-1.8-33.8-60.426.6

32 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 32 IF Downconverter 1-2 GHz Device 1-2 GHz GainSignal dBm/GHz Noise dBm/GHz Spectral SNR Headroom Isolator-0.8-34.6-61.226.6 Mixer-5-39.6-66.126.5 Isolator-0.6-40.2-66.726.5 BP Filter-41.2-67.726.5 Amplifier20-21.2-47.526.332.2

33 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 33 IF Downconverter 1-2 GHz Device 1-4 GHz GainSignal dBm/GHz Noise dBm/GHz Spectral SNR Headroom RF Switch-1.8-23-49.326.3 Attenuator-3-26-52.326.3 LP Filter-27-53.326.3 Attenuator-3-30-56.226.2 Amplifier13-17-43.226.217

34 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 34 IF Downconverter 1-2 GHz Device 1-4 GHz GainSignal dBm/GHz Noise dBm/GHz Spectral SNR Headroom Attenuator-3-20-46.226.2 BP Filter-21-47.226.2 Attenuator-3-24-50.226.2 Dig. Attn.-8-32-58.226.2 Amplifier13-19-45.226.218.9

35 Travis Newton LO-IF Engineer EVLA LO/IF PDR 22-23 January 2002 35 IF Downconverter 1-2 GHz Device 1-4 GHz Gain dB Signal dBm/GHz Noise dBm/GHz Spectral SNR Headroom dB Power Div.-3.5-22.5-48.726.2 TPD-10-32.5-58.726.218.4 Amplifier0-22.5-48.726.222.4 Out to Sampler -.1-22.6-48.826.2

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