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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

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
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
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
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
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
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