This is the decoder/generator hardware for HRPT, CHRPT and HRI (note: no HRI after december 2005!)
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.
Make sure that you get the right type in the right package:
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 |
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,- |
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.