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.
and enter near Enter your Part number(s): xc3042
|Display Electronica||Utrecht, the Netherlands||not in stock|
PCB and EPROM can be ordered at:
In this link, go to the table below, and choose:
DTMF Encoders, Decoders & Controllers
Last item in this page is the HRPT decoder.
|PCB + EPROM||Eur. 23,-|
Order form in html:
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.