1. Bob Hayward Receiver Engineer Feed & Front End PDR 12-13 Feb 2002 1 Feed & Front End PDR Q, Ka, K, Ku & X-Band Receivers Backup Slides

2. Bob Hayward Receiver Engineer Feed & Front End PDR 12-13 Feb 2002 2 T Rx Estimates VLBA vs. EVLA Comparison Receiver VLBA T Rx (  K)EVLA T Rx (  K) Q 5644 Ka - 38 K 6128 Ku 3421 X 3521 C 2416 S 1311 L 179

3. Bob Hayward Receiver Engineer Feed & Front End PDR 12-13 Feb 2002 3 EVLA Receiver Prototype Schedule -------------------------------------------------------------------------------- | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | |--------+--------+--------+--------+--------+--------+--------+--------+--------| | | | | | | | | | | Modify Antennas | | >--1-7--->--8-14-->-15-21-->-22-28--> | | | | | | | | | | | | | Prototype K-Band |--------> | | | | | | | | Prototype Q-Band |--------> | | | | | | | | Prototype C-Band | >--------> | | | | | | | | Prototype U-Band | >--------> | | | | | | | | Prototype L-Band | | >-------> | | | | | | | Prototype X-Band | | >-------> | | | | | | | Prototype S-Band | | | >--------> | | | | | | Prototype A-Band | | | >--------> | | | | | | | | | | | | | | | | |--------+--------+--------+--------+--------+--------+--------+--------+--------| | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | --------------------------------------------------------------------------------

4. Bob Hayward Receiver Engineer Feed & Front End PDR 12-13 Feb 2002 4 EVLA Receiver Production Schedule -------------------------------------------------------------------------------- | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | |--------+--------+--------+--------+--------+--------+--------+--------+--------| Modify Antennas | | >--1-7--->--8-14-->-15-21-->-22-28--> | | | | | | | | | | | | | Build/Install K | | >-2->---7---->---7---->---7---->---7----> | | | Build/Install Q | | >-2->---7---->---7---->---7---->---7----> | | | | | | | | | | | | | Build/Install C | | >---7---->---7---->---7---->---7---->-2-> | | | Build/Install U | | >---7---->---7---->---7---->---7---->-2-> | | | | | | | | | | | | | Build/Install L | | | | >-1->---3---->---3---->---8---->----8--->----7---> Build/Install X | | | | >-1->---3---->---3---->---8---->----8--->----7---> | | | | | | | | | | Build/Install S | | | | >---3---->---3---->---7---->----9--->----8---> Build/Install A | | | | >---3---->---3---->---7---->----9--->----8---> |--------+--------+--------+--------+--------+--------+--------+--------+--------| | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | --------+--------+--------+--------+--------+--------+--------+--------+-------- No. of Upgraded Rx’s 4 14 14 14 14 0 0 0 No. of New Rx’s 0 14 16 26 26 34 36 30 ---- ---- ---- ---- ---- ---- ---- ---- Total per year 6 30 32 40 40 34 34 30

5. Bob Hayward Receiver Engineer Feed & Front End PDR 12-13 Feb 2002 5 EVLA Amplifier Production Schedule -------------------------------------------------------------------------------- | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | |--------+--------+--------+--------+--------+--------+--------+--------+--------| Sub- Antennas | | >--1-7--->--8-14-->-15-21-->-22-28--> | | | total | | | | | | | | | | ----- K-Amps | | |2 2 2 |2 2 2 |2 2 2 |2 2 2 | | | | = 24 Q-Amps | | |2 2 2 2 |2 2 2 2 |2 2 2 2 |2 2 2 2 | | | | = 32 | | | | | | | | | | C-Amps | |P4 4 |4 4 4 4 |4 4 4 4 |4 4 4 4 |4 4 4 4 | | | | = 72 U-Amps | |P4 4 |4 4 4 4 |4 4 4 4 |4 4 4 4 |4 4 4 4 | | | | = 72 | | | | | | | | | | L-Amps | | |P4 2 |2 2 2 |2 2 2 |2 2 2 |4 4 4 4 |4 4 4 4 |4 4 4 4 | = 72 X-Amps | | |P4 2 |2 2 2 |2 2 2 |2 2 2 |4 4 4 4 |4 4 4 4 |4 4 4 4 | = 72 | | | | | | | | | | S-Amps | | | |P4 2 |2 2 2 |4 4 4 |4 4 4 4 |4 4 4 4 |4 4 4 4 | = 72 A-Amps | | | |P4 2 |2 2 2 |4 4 4 |4 4 4 4 |4 4 4 4 |4 4 4 4 | = 72 |--------+--------+--------+--------+--------+--------+--------+--------+--------| | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | --------+--------+--------+--------+--------+--------+--------+--------+-------- Prototypes 0 8 8 8 0 0 0 0 0 Production 0 8 50 62 70 82 64 64 64 ---- ---- ---- ---- ---- ---- ---- ---- ---- Total/year 0 16 58 70 70 82 64 64 64 488

6. Bob Hayward Receiver Engineer Feed & Front End PDR 12-13 Feb 2002 6 What can we Scavenge from the Old A&F-Racks? Nope: LNA’s, Filters, Post Amps, Model 1020 Fridge Maybe: Noise Diodes & Couplers (Noise Diode for K / Ku Spec’d for 14.4-24.0 GHz) Hopefully: Various Switches

7. Bob Hayward Receiver Engineer Feed & Front End PDR 12-13 Feb 2002 7 Gain/Phase Stability Improvement Calibration Noise Sources: Constant Current Circuits Temperature Coefficient typically 0.01 dB/  C (~1% change in T Cal for a 5  C temperature change) Thermally Lagged and/or Temperature Stabilization Post Amps: Temperature Stabilization IF/LO Cabling: Improved rigidity & support of heliax cables

8. Bob Hayward Receiver Engineer Feed & Front End PDR 12-13 Feb 2002 8 Transition Old Rx’s on New Antennas Current K-Band VLA receiver will not work on modified EVLA antennas Incompatible IF’s bands (4.0-4.5 vs. 8-12 GHz) Current Q-Band would work with a kludge IF system limited to 7.7-9.1 GHz Ku-Band will have an Up-Converter (LO/IF) This “Interim” unit later built into new Ku-Band Rx

9. Bob Hayward Receiver Engineer Feed & Front End PDR 12-13 Feb 2002 9 Transition New Rx’s on Old Antennas New Q, Ka, K, Ku receivers will not work on unmodified antennas: Incompatible LO Reference Frequencies –F3 (16-20 GHz) vs. new 1 st LO (12-20 GHz) will not cover entire range of new Ka, K & Ku-Bands IF Power Levels (no IF amp in new receivers)

10. Bob Hayward Receiver Engineer Feed & Front End PDR 12-13 Feb 2002 10 Quiet Sun Amplifier Compression (Level : OK ; above 1% ; above 1 dB) Rx BW GHz Tsky 1000  K LNA (P o =-10dBm)Post (P o =+10dBm)3 rd Amp Tn  K G dB P dBm NF dB G dB P dBm G dB P dBm L1100225-34.1.0325-9.12010.9 S270440-18.12256.9-- C430840-18.12256.2-- X4201040-20.62254.4-- Ku610 40-21.83253.2-- K891535-26.0425-- Ka1362035-25.7525-0.7-- Q17635 -24.55250.5--

11. Bob Hayward Receiver Engineer Feed & Front End PDR 12-13 Feb 2002 11 Active Sun (10 x Quiet) Amplifier Compression (Level : OK ; above 1% ; above 1 dB) Rx BW GHz Tsky 1000  K LNA (P o =-10dBm)Post (P o =10dBm)3 rd Amp Tn  K G dB P dBm NF dB G dB P dBm G dB P dBm L11000225-24.1.03250.92020.9 S2700440-8.122516.9-- C4300840-8.822516.2-- X42001040-10.622514.4-- Ku61001040-11.832513.2-- K8901535-16.04259.0-- Ka13602035-15.75259.3-- Q176035 -14.552510.5--

12. Bob Hayward Receiver Engineer Feed & Front End PDR 12-13 Feb 2002 12 Front End Group Test Equipment Vector Network Analyzer (0.01-26.5 GHz) Scalar Network Analyzer (0.01-26.5 GHz) Waveguide Source Modules (Ka, Q & W-Band) Spectrum Analyzer (0.01-26.5 GHz) Waveguide Harmonic mixers for Ka, Q and W-Band High Dynamic Range Power Meter Sensors covering DC-110 GHz

13. Bob Hayward Receiver Engineer Feed & Front End PDR 12-13 Feb 2002 13 Automated Receiver Test Systems SOIDA- 2 Synthesizers + Down Converter - Power Meter + Cal Switch Driver - PC Controlled using Quick Basic Automated Measurement of T Rx, T cal and S Cal Have 2 “old-style” SOIDA systems now (largely obsolete) Will need 2 “new-generation” systems to meet production schedule (  $100K each) Need new low reflection Hot/Cold loads for L,S,C,X & Ku Use CV-3 absorber for Hot & Cold (dipped in LN2) Loads for K, Ka & Q

14. Bob Hayward Receiver Engineer Feed & Front End PDR 12-13 Feb 2002 14 Lab Polarization Measurements at Q-Band

15. Bob Hayward Receiver Engineer Feed & Front End PDR 12-13 Feb 2002 15 ComponentTemp (K)L/G (dB)  T Rx (K) Feed300-0.053.474 Vacuum Window300-0.0010.069 OMT50-0.11.165 Hybrid18-0.20.848 Cal Coupler18-0.20.848 LNATn = 8+409.082 Cold SS Coax150-20.010 Warm Coax300-0.50.007 Post AmpNF=2 dB+250.035 Splitter300-40.000 Mixer300-100.004 IF Cable300-30.005 Total T Rx 11.01 C-Band Noise Budget Cooled Isolator (0.5 dB) add 3.31  K

16. Bob Hayward Receiver Engineer Feed & Front End PDR 12-13 Feb 2002 16 ComponentTemp (K)L/G (dB)  T Rx (K) Feed300-0.053.474 Vacuum Window300-0.0010.069 OMT50-0.11.165 Hybrid18-0.20.848 Cal Coupler18-0.20.848 LNATn = 4+404.541 Cold SS Coax150-20.010 Warm Coax300-0.50.007 Post AmpNF=2 dB+250.035 Splitter300-40.000 Mixer300-100.004 IF Cable300-30.005 Total T Rx 11.01 S-Band Noise Budget Cooled Isolator (0.5 dB) add 2.75  K

17. Bob Hayward Receiver Engineer Feed & Front End PDR 12-13 Feb 2002 17 ComponentTemp (K)L/G (dB)  T Rx (K) Feed300-0.053.474 Vacuum Window300-0.0010.069 OMT50-0.11.165 Hybrid18-0.20.848 Cal Coupler18-0.50.848 LNA – 1 st G-BlockTn = 2+252.271 Cooled Filter18-30.64 LNA – 2 nd G-BlockTn = 4+250.029 Coax150 & 300-2 & -0.50.003 Post AmpNF=2 dB+250.007 Splitter300-40.000 Mixer300-100.001 Total T Rx 8.78 L-Band Noise Budget Cooled Isolator (0.5 dB) add 2.49  K