README file for the guider camera CAD files
===========================================

The Magellan guider camera board set that we use is the following:
gcam_pre_v1             Preamp pcb
gcam_dsp_v2             DSP timing generator pcb
gcam_clkdrv_v1          Clock driver pcb
gcam_sig_v1             Signal processing pcb
gcam_pwr_v1             Power board
gcam_bp_v1              Backplane pcb

pci_v2                  PCI interface pcb [RS-485]


The Magellan board set was designed with Protel99SE, which
is now obsolete.  Known issues with the pcbs are listed here:
a- some capacitors barnacled onto the pwr board
b- resistor + capacitor added to the preamp board temperature 
monitoring circuit
c- extra filter capacitors on preamp board -- these are 
oversized (1206) parts that just barely fit on 0805 pads.


The updated board set that is available is listed here:
gcam_pre_v2             Preamp pcb
gcam_dsp_v3             DSP timing generator pcb
gcam_clkdrv_v2          Clock driver pcb
gcam_sig_v2             Signal processor pcb
gcam_pwr_v2             Power pcb
gcam_bp_v2              Backplane pcb

pci_v2                  PCI interface [RS-485]
pci_v3                  PCI interface [RS-485]


The updated boards were designed with Protel DXP. These boards 
have a few differences from the first board set:
a- the preamplifier is a simpler design
b- the barnacles have been cleaned up
c- power board inductors are changed
d- signal processing pcb now has 16-bit ADC, improved filtering

The epld files that go with the board sets are listed here:
gcam_epld_v3.1          EPLD code for gcam_dsp_v3
gcam_epld_v2.3          EPLD code for gcam_dsp_v2
pci16_epld_v3.6a        EPLD code for pci_v3 [RS-485]
pci16_epld_v2.5a        EPLD code for pci_v2 [RS-485]
nvram_v3                Serial eprom code for pci (all versions)


CAD notes
=========

Protel99SE was used to design the v1 pcbs.  The revised v2 pcbs
were designed with Protel DXP.

The v1 schematics and pcb layouts have been imported into DXP,
but I haven't tried to generate gerbers from these DXP files.
So far, we have only used them for printing the schematics and
viewing the layouts.

The epld files were originally designed with Altera MaxPlusII.
These have been converted over to the QuartusII software, and
re-designed using verilog.

Rather than breaking out the schematic files seperately in pdf 
format (as was done previously), these files are now included in
the folder for each board.