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EVLA Front-End CDR EVLA Receiver Monitor & Control F317 and F320 Modules Antenna Front Ends Two Types of Front End Styles  VLA Style Card Cage System  EVLA Interface to F14’s Required  This EVLA Interface is Called the F320  EVLA Style Card Cage System

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Evla front end cdr l.jpg

EVLA Front-End CDR

EVLA Receiver

Monitor & Control

F317 and F320 Modules

EVLA Front-End CDR – EVLA Receiver Monitor & Control

April 24, 2006


Antenna front ends l.jpg
Antenna Front Ends

  • Two Types of Front End Styles

     VLA Style Card Cage System

     EVLA Interface to F14’s Required

     This EVLA Interface is Called the F320

     EVLA Style Card Cage System

     This EVLA Interface is Called the F317

EVLA Front-End CDR – EVLA Receiver Monitor & Control

April 24, 2006


F320 f14 l.jpg
F320 & F14

  • F320

     Incorporates a MIB and Analog Card

     Two New Regulator Card Supplies +5V,

    +15V, -15V, & 28V to F320, F14’s, and

    Front Ends

     New Interface Card Manages F14 Logic

    Functions using MIB Features SPI and GPIO

EVLA Front-End CDR – EVLA Receiver Monitor & Control

April 24, 2006


F320 f144 l.jpg
F320 & F14

  • Front End to F14 (Manages Three)

    Two DB25 Cables

     Carries Power, 11 Analog Signals, Solar

    or Normal Cals, 21 Digital Bits, and

    3 bits of Cryogenics Control

    All Logic Switching, Sampling, etc. is Internal

    to the F14.

EVLA Front-End CDR – EVLA Receiver Monitor & Control

April 24, 2006


Slide5 l.jpg
F317

  • Design – We Want More, But We Want Less

     Card Cage Allows for 96 Analog Monitor Points

    • Card Cage Allows for 128 Bits Digital Monitor Points

    • Card Cage Allows for 128 Bits Digital Control Points

    • During Astronomy We Want Only These Defaults

       3 Analogs, 4 Bits Digital Monitors, No Commands

       Analogs – 15°K, RCP & LCP Gate Voltage

      Summation

EVLA Front-End CDR – EVLA Receiver Monitor & Control

April 24, 2006


Slide6 l.jpg
F317

  • Front End to F317 (Manages Five)

    One DB50 Cable

     3 Analog Channels, Solar or Normal Cals, 4 Bit

    Digital Monitor Bus, 4 Bits Digital Command Bus,

    5 Bit Address Bus, and a SPI Port

     All Signals are Differential

    All Logic Switching, Analog Switching, etc. is Internal

    to the Card Cage.

     Each Front End Receiver is Individualized

EVLA Front-End CDR – EVLA Receiver Monitor & Control

April 24, 2006


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