The hardware (1995 design).

This is the decoder/generator hardware for HRPT, CHRPT and HRI (note: no HRI after december 2005!)

The 2 square IC's are the FPGA's.
Left-below, on PCB the trimmer to adjust the central VCO frequency
Right-below left-FPGA: EPROM containing the decoder and generator codes
Below right-FPGA: The elastic-store DRAM and XTAL, for the DRAM controller (which is in this FPGA)
Top (back panel), left: connectors for HRPT-input (from receiver) and output
right from middle: output to PC parallel port.
Bottom, against front panel: PCB with LEDs; switches for decoder choice, power switch

between EPROM and RAM module: Dip switch. Just 2 switches are used, to select between HRPT, CHRPT and PDUS. (Selection between decoders and generators is done via the parallel port.) This dip-switch is replaced by connectors/jumpers on the new PCB.

At the left the trimmer to adjust the VCO frequency.

Where to get FPGAs

Here are a few addresses where you can try to get the FPGA's. If you know other addresses please let me know, so I can add them to the list.
Note that this is just a collection of possible addresses; I don't check this info from time to time if it is still valid. So, no guaranty!

Make sure that you get the right type in the right package:

Type:
- XC3042A (Xilinx) (prefered one; see note!)
- Or XC3042 (Xilinx)
- Or 3042 (Lucent or AT&T)
Package PLCC 84 pins (PC84)
Frequency minimal 70 MHz (or speed grade of 7 ns)

E.g.:

XC3042-70PC84

XC3042A-7PC84

Note: Xilinx type XC3042L is a 3.5V type, so you need different EPROM/RAM/74HC14 and parallel port types (3.5V equivalents) or 3.5<-->5V translators. The schematic and EPROM content stay the same.

NOTE: For future designs maybe just the XC3042A type will be possible to use. So, if you have the choice between XC3042 and XC3042A then use XC3042A.

Firm URL/address comment
Digi-Key http://www.digi-key.com XC3042A-7PC84C, XC3042-100PC84C
Avnet http://www.avnet.com Try http://www.em.avnet.com/cgi-bin/sc.cgi
and enter near Enter your Part number(s): xc3042
Display Electronica Utrecht, the Netherlands not in stock
Farnell http://www.farnell.com ATT3042-125
Insight http://www.insight.de.memec.com XC3042-100PC84

Firm	URL/address	comment
Digi-Key	http://www.digi-key.com	XC3042A-7PC84C, XC3042-100PC84C
Avnet	http://www.avnet.com	Try http://www.em.avnet.com/cgi-bin/sc.cgi and enter near Enter your Part number(s): xc3042
Display Electronica	Utrecht, the Netherlands	not in stock
Farnell	http://www.farnell.com	ATT3042-125
Insight	http://www.insight.de.memec.com	XC3042-100PC84

How to get a PCB

See PCB info if you want to make your own PCB.
See Eprom files if you want to program your own EPROM.

PCB and EPROM can be ordered at: farcircuits.
In this link, go to the table below, and choose:
DTMF Encoders, Decoders & Controllers
Last item in this page is the HRPT decoder.

Incl. shipping
PCB Eur. 13,00
EPROM Eur. 10,00
PCB + EPROM Eur. 23,-

	Incl. shipping
PCB	Eur. 13,00
EPROM	Eur. 10,00
PCB + EPROM	Eur. 23,-

PCB's are made of g-10 material and are drilled, etched, and solder coated
The EPROM contains decoders and generators for HRPT, CHRPT and HRI.

Order form in html: order.htm
Same, in pdf format: order pdf

Please mention on the form that you want to order the HRPT/PDUS DECODER BOARD and/or EPROM for HRPT/PDUS decoder.